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Publication numberCN101573197 A
Publication typeApplication
Application numberCN 200780048351
PCT numberPCT/US2007/026052
Publication date4 Nov 2009
Filing date20 Dec 2007
Priority date27 Dec 2006
Also published asCA2672704A1, EP2111474A2, US7841259, US8176812, US20080156148, US20100319492, WO2008085381A2, WO2008085381A3
Publication number200780048351.8, CN 101573197 A, CN 101573197A, CN 200780048351, CN-A-101573197, CN101573197 A, CN101573197A, CN200780048351, CN200780048351.8, PCT/2007/26052, PCT/US/2007/026052, PCT/US/2007/26052, PCT/US/7/026052, PCT/US/7/26052, PCT/US2007/026052, PCT/US2007/26052, PCT/US2007026052, PCT/US200726052, PCT/US7/026052, PCT/US7/26052, PCT/US7026052, PCT/US726052
InventorsRH史密斯, JH史蒂文斯
Applicant贝克休斯公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Methods and systems for compaction of powders in forming earth-boring tools
CN 101573197 A
Abstract
Methods for forming bodies of earth-boring drill bits and other tools include milling a plurality of hard particles and a plurality of particles comprising a matrix material to form a mill product comprising powder particles, separating the particles into a plurality of particle size fractions. Some of the particles from the fractions may be combined to form a powder mixture, which may be pressed to form a green body. Additional methods include mixing a plurality of hard particles and a plurality of particles comprising a matrix material to form a powder mixture, and pressing the powder mixture with pressure having an oscillating magnitude to form a green body. In yet additional methods a powder mixture may be pressed within a deformable container to form a green body and drainage of liquid from the container is enabled as the powder mixture is pressed.
Claims(20)  translated from Chinese
1. 一种形成钻地工具的钻头体的方法,所述方法包括: 研磨多个硬质颗粒和多个包括基材的颗粒以形成包括粉末颗粒的研磨产物; 将所述粉末颗粒分离成多个粒度级; 将所述多个粒度级中的至少两个粒度级的至少一部分进行组合以提供粉末混合物; 挤压所述粉末混合物以形成钻头体生坯;以及至少部分地烧结所述钻头体生坯。 A method for forming a bit body of an earth-boring tool, the method comprising: milling a plurality of hard particles and a plurality of particles comprising a substrate to form an abrasive product comprising powder particles; and separating the powder particles into a plurality of grain fractions; the plurality of the at least a portion of the at least two grain size fractions of the grain size fractions are combined to provide a powder mixture; extruding the powder mixture to form a green bit body; and at least partially sintering the bit body green.
2. 按照权利要求l的方法,其中,挤压所述粉末混合物包括以具有振荡幅值的基本上均匀的压力挤压所述粉末混合物。 2. A method according to claim l, wherein said powder mixture comprises extruding a substantially uniform pressure with the amplitude of oscillation of pressing the powder mixture.
3. —种形成钻地工具的钻头体的方法,所述方法包括: 混合多个硬质颗粒和多个包括基材的颗粒以形成粉末混合物; 以具有振荡幅值的基本上均匀的压力挤压所述粉末混合物以形成钻头体生坯;以及至少部分地烧结所述钻头体生坯。 3. - seed drill bit body to form a tool, the method comprising: mixing a plurality of hard particles and a plurality of particles comprising a substrate to form a powder mixture; substantially uniform amplitude pressure oscillations having a pressing pressing said powder mixture to form a green bit body; and at least partially sintering the green bit body.
4. 按照权利要求2和3中任一项的方法,其中,以具有振荡幅值压力总体上增加至选定的最大压力的同时使得所述基本上均匀的压力的幅值振荡。 2 and 4. While the method of any one of claim 3, wherein, in order to have an increased amplitude of oscillation is generally a selected pressure such that the maximum pressure amplitude of oscillation substantially uniform pressure.
5. 按照权利要求2和3中任一项的方法,其中,以具有振荡幅值的基本上均匀的压力挤压所述粉末混合物包括使得所述基本上均匀的压力的幅值以大约每秒一个周期(1赫兹)和大约每秒一百个周期(100 赫兹)之间的平均频率振荡。 Amplitude 5.2 and method according to claim 3, wherein the substantially uniform pressure oscillations having a magnitude such that pressing the powder mixture comprising the substantially uniform pressure is approximately every second the average frequency of the oscillation period of between one (1 Hertz) and about one hundred cycles per second (100 Hz).
6. 按照权利要求5的方法,其中,以具有振荡幅值的基本上均匀的压力挤压所述粉末混合物包括使得所述基本上均匀的压力的幅值以大约千分之六兆帕(0.006MPa)和大约六十九兆帕(69MPa)之间的平均振荡幅值振荡。 6. The method according to claim 5, wherein a substantially uniform pressure with the magnitude of the amplitude of oscillation of pressing the powder mixture comprises a substantially uniform pressure so that approximately six thousandths of megapascals (0.006 MPa) and the average amplitude of oscillation of the oscillation between about sixty-nine megapascals (69MPa).
7. 按照权利要求2和3中任一项的方法,其中,以基本上均匀的压力挤压所述粉末混合物包括以大于约三十五兆帕(35MPa)的选定最大压力挤压所述粉末混合物。 And 7.2 A method according to any one of claim 3, wherein the substantially uniform pressure comprises pressing the powder mixture is greater than about 35 to a selected megapascals (35MPa) the maximum pressure of the extrusion powder mixture.
8. 按照权利要求1和3中任一项的方法,进一步包括在挤压所述粉末混合物的同时排出液体。 8. The method as claimed in claim 1 and any one of 3, further comprising draining liquid while pressing the powder mixture.
9. 一种形成钻地工具的钻头体的方法,所述方法包括: 混合多个硬质颗粒和多个包括基材的颗粒以形成粉末混合物; 将所述粉末混合物提供到可变形容器中; 将压力施加至所述可变形容器的至少一个外表面上,以挤压所述粉末混合物并形成钻头体生坯; 在将压力施加至所述可变形容器的至少一个外表面上的同时,使得液体能够从所述可变形容器排出;以及至少部分地烧结所述钻头体生坯。 The method of the bit body, the method of forming an earth-boring tool comprising: mixing a plurality of hard particles and a plurality of particles comprising a substrate to form a powder mixture; the powder mixture may be supplied to the deformable container; at least one outer surface of the applying pressure to the deformable container to press the powder mixture and form a green bit body; at least one outer surface while applying pressure to the deformable container, such that the liquid can be discharged from the deformable container; and at least partially sintering the green bit body.
10. 按照权利要求9的方法,进一步包括将真空施加至所述粉末混合物以利于液体从所述可变形容器排出。 10. The method according to claim 9, further comprising applying a vacuum to the powder mixture to facilitate liquid from the deformable container.
11. 按照权利要求9的方法,其中,混合多个硬质颗粒和多个包括基材的颗粒以形成粉末混合物的步骤包括: 研磨多个硬质颗粒和多个包括基材的颗粒以形成包括粉末颗粒的研磨产物; 将所述粉末颗粒分离成多个粒度级;以及将所述多个粒度级中的至少两个粒度级的至少一部分进行组合以提供所述粉末混合物。 11. The method as claimed in claim 9, wherein mixing a plurality of hard particles and a plurality of particles comprising a substrate to form a powder mixture comprises: milling a plurality of hard particles comprising a substrate and a plurality of particles to form comprises milled product powder particles; separating the powder particles into a plurality of levels of granularity; and at least a portion of the plurality of the at least two grain size fractions of the grain size fractions are combined to provide the powder mixture.
12. 按照权利要求1和11中任一项的方法,其中,将所述多个粒度级中的至少两个粒度级的至少一部分进行组合的步骤包括对所述多个粒度级中的非全部粒度级中的至少一部分进行组合以提供所述粉末混合物。 11 and 12. The method according to any one of claims, wherein at least a portion of the plurality of the at least two grain fractions in the grain fractions comprises the step of combining all of said plurality of non-granularity of the size fraction are combined to provide at least a portion of the powder mixture.
13. 按照权利要求1和11中任一项的方法,其中,研磨多个硬质颗粒和多个包括基材的颗粒的步骤包括: 将所述多个硬质颗粒和所述多个包括基材的颗粒与研磨介质一起提供至容器中;以及使所述研磨介质相对于所述多个硬质颗粒和所述多个包括基材的颗粒移动,以研磨所述多个硬质颗粒和所述多个包括基材的颗粒。 11 and 13. The method according to any one of claims, wherein the plurality of abrasive particles and a plurality of hard particles comprising a substrate comprising the step of: the plurality of hard particles and the plurality of groups comprises providing a particulate material together with a grinding medium into a container; and the grinding media relative to the plurality of hard particles and said substrate comprises a plurality of moving particles to abrade the hard particles and the plurality said plurality of particles comprising the substrate.
14. 按照权利要求1和11中任一项的方法,其中,分离所述粉末颗粒的步骤包括使得所述粉末颗粒依次经过多个筛网中的每一个。 14. A method according to claim 1 and any one of 11, wherein the step of separating the powder particles comprises causing the powder particles sequentially through each of the plurality of screens.
15. 按照权利要求1和11中任一项的方法,进一步包括使得所述粉末混合物经受具有能够增加粉末混合物中的最终密度的平均幅值和峰值加速度的机械振动。 15. The method as claimed in claim 1 and any one of 11, further comprising causing said powder mixture is subjected to mechanical vibrations having an average amplitude can be increased and the peak density of the final powder mixture acceleration.
16. 按照权利要求15的方法,进一步包括使得所述粉末混合物经受平均幅值在大约0.25毫米和大约2.50毫米之间、峰值加速度在大约二分之一重力加速度和大约五倍重力加速度之间的机械振动。 16. The method according to claim 15, further comprising subjecting the powder mixture so that the average amplitude of between about 0.25 mm and about 2.50 mm, a peak acceleration of between about one-half the acceleration of gravity and about five times the acceleration of gravity mechanical vibration.
17. 按照权利要求l、 3和9中任一项的方法,进一步包括: 选择所述多个硬质颗粒以包括选自由以下材料所组成的群组的材料:金刚石、碳化硼、氮化硼、氮化铝以及W、 Ti、 Mo、 Nb、 V、 Hf、 Zr、 Si、 Ta和Cr的碳化物或硼化物;以及从由下述材料所组成的群组中选择所述基材:钴基合金、铁基合金、镍基合金、钴镍基合金、铁镍基合金、铁钴基合金、铝基合金、 铜基合金、镁基合金和钛基合金。 Claim 17. The L, 3 and 9, the method of any one of, further comprising: selecting the plurality of hard particles to comprise a material selected from the group consisting of consisting of the following materials: diamond, boron carbide, boron nitride , aluminum nitride, and W, Ti, Mo, Nb, V, Hf, Zr, Si, Ta, and Cr carbide or boride; and selecting said substrate from the group consisting of the following materials consisting of: cobalt based alloys, iron based alloys, nickel based alloys, cobalt and nickel-based alloys, iron-nickel-based alloys, iron-cobalt-based alloys, aluminum based alloys, copper based alloys, magnesium-based alloys and titanium based alloys.
18. 按照权利要求9的方法,其中,将压力施加至所述可变形容器的至少一个外表面上以挤压所述粉末混合物并形成钻头体生坯的步骤包括:以具有振荡幅值的基本上均匀的压力挤压所述粉末混合物以形成钻头体生坯。 Step least one outer surface to press the powder mixture and form a green bit body 18. A method according to claim 9, wherein applying pressure to the deformable container comprising: an oscillation amplitude substantially uniform pressure on the powder mixture is pressed to form a green bit body.
19. 一种以权利要求1至18中任一项的方法所形成的钻地工具的钻头体。 19. A method as claimed in claim bit body to earth-boring tool of any of the methods 1 to 18 is formed.
20. —种用于形成钻地工具的钻头体的系统,所述系统包括: 压力腔; 可变形容器,其设置在所述压力腔内并构造成在其内容纳粉末混合物;以及至少一个管道,其提供所述可变形容器的内部区域和所述压力腔的外部之间的流体连通。 20. - The system used to form the bit body kinds of boring tool, the system comprising: a pressure chamber; deformable container, which is disposed in the pressure chamber and configured to accommodate therein the powder mixture; and at least one conduit which provides fluid communication between the exterior of said deformable container and the interior region of the pressure chamber communicates.
Description  translated from Chinese
用于挤压粉末形成钻地工具的方法和系统优先权要求本申请要求2006年12月27日申请的美国专利申请第11/646,225 号的优先权。 A method for pressing powders forming earth-boring tools and systems PRIORITY CLAIM This application claims the benefit of Dec. 27, 2006 U.S. Patent Application Serial No. 11 / 646,225.

技术领域 FIELD

本发明的实施例涉及用于形成钻地工具钻头体的方法以及使用此种方法形成的钻地工具,其中所述钻头体包括颗粒基复合材料。 Embodiments of the present invention relates to a method for earth-boring bit body forming tools and the use of such a method of forming earth-boring tool, wherein the bit body comprises a particle-matrix composite material. 背景技术旋转式钻头广泛用在在地层中钻孔或井。 BACKGROUND Rotary drill bits are widely used in drilling or well in the formation. 一种类型的旋转式钻头是固定牙轮式钻头(经常称为"刮刀钻头"),其通常包含固定至钻头体的面区域的切削元件。 One type of rotary drill bit is the fixed-cutter bit (often referred to as "drag bits"), which typically comprises a cutting element secured to a face region of the bit body. 旋转式钻头的钻头体可以钢制成。 Rotary drill bit body may be made of steel. 替代地, 钻头体可以颗粒基复合材料形成。 Alternatively, the bit body may be formed particulate matrix composite. 在图1中示出传统钻地旋转式钻头10,其包含包括颗粒基复合材料的钻头体12。 In FIG 1 illustrates a conventional earth-boring rotary drill bit 10, which includes a drill bit comprising a particulate matrix composite body 12. 钻头体12固定至具有美国石油协会(API)螺紋连接部28的钢杆12,用于将钻头体12附接至钻杆(未示出)。 12 is fixed to the bit body having American Petroleum Institute (API) threaded connection portion 28 of the steel rod 12 for the bit body 12 is attached to a drill pipe (not shown). 钻头体12包含冠部14和钢坯件16。 The bit body 12 includes a crown portion 14 and the billet 16. 钢坯件16 部分地嵌在冠部14内。 Steel blank 16 is partially embedded within the crown portion 14. 冠部14包含诸如例如嵌在铜合金基材中的碳化鴒。 Crown portion 14 comprising a substrate such as a copper alloy is embedded in the carbonization e.g. ling. 钻头体12通过螺紋连接部22和沿着钻头体12和钢杆20之间的分界面在外表面上绕着钻头10延伸的焊接部的方式固定至钢杆20。 The bit body 12 through the interface between the body 22 and the drill bit 12 and steel rod 20 along the threaded portion of the drill 10 extends around the outer surface of the welded portion 20 is fixed to a steel rod. 钻头体12可以进一步包含由排屑槽分隔的翼或刃30。 The bit body 12 may further comprise wings separated by flutes or blades 30. 在钻头体12的端面18和纵向孔40之间延伸的内部流体通道(未示出),纵向孔40延伸穿过钢杆20且部分地穿过钻头体12。 In the internal fluid passage 40 which extends between the end face 18 of the bit body 12 and a longitudinal bore (not shown), the longitudinal bore 40 extends through the steel bars 20 and 12 partially through the bit body. 喷嘴嵌件(未示出) 也可以在所迷内部流体通道内设置在钻头体12的端面18处。 A nozzle insert (not shown) may be provided at the end face 18 of the bit body 12 within the internal fluid passage of the fan. 多个切削元件34附接至钻头体12的端面18。 A plurality of cutting elements 34 is attached to the end face 18 of the bit body 12. 通常,固定牙轮式钻头或者为盘形,或者为圆柱形。 Typically, the fixed-cutter drill or a disk-shaped, or cylindrical. 包括硬的超耐磨材料(诸如多晶金 It includes hard superabrasive materials (such as polycrystalline gold

刚石的互相约束颗粒)的切削表面35可以设置在各切削元件34的基本上为圆形的端面上。 Cutting surface of diamond particles bound to each other) 35 may be provided in each of the cutting element 34 is substantially circular end face. 此种切削元件34通常称为"多晶金刚石复合片,, (PDC)切削元件34。 PDC切削元件34可以沿着在钻头体12的端面18中形成的凹部36内的刃30设置,以及可以由支持部38从后面支撑,所述支持部38可以与钻头体12的冠部14整体成形。通常,切削元件34与钻头体12分离地制造并固定在钻头体的外表面中形成的凹部36内。诸如粘合剂的结合材料,更典型地硬钎焊合金可以用于将切削元件34固定至钻头体12。在钻井操作中,钻头10固定至钻杆的端部,钻杆包括圆筒状的管子和端对端联接在钻头10和表面处的其它钻井设备之间的设备部。钻头10定位在井孔的底部,使得切削元件34临近待钻井的地层。诸如旋转台或顶部驱动装置的设备可以用来旋转钻杆以及钻井内的钻头10。替代地,钻头10的杆20可以直接联接至钻井马达的驱动轴,然后,所述驱动轴可以用于旋转钻头10。随着钻 Such cutting elements 34 commonly referred to as "polycrystalline diamond compact ,, (PDC) cutting elements 34. PDC cutting elements 34 may be provided within the edge 30 along the recessed portion 36 formed in the end face 18 of the bit body 12, and can be recessed portion 36 supported portion is supported from the rear 38 of the support portion 38 may be 14 integrally molded crown portion 12 of the drill body. typically, the cutting element 34 and the bit body 12 manufactured separately and fixed is formed on the outer surface of the bit body in the., such as adhesive bonding material, more typically brazing alloy may be used for the cutting element 34 secured to the bit body 12. in the drilling operation, the drill bit 10 is fixed to the end portion of the drill pipe, the drill pipe comprising a cylindrical shaped tube and coupled end to end between the drill bit 10 and other drilling equipment at the surface of the device portion drill bit 10 is positioned at the bottom of the well bore, so that the cutting element 34 adjacent the formation to be drilled. such as a rotary table or top drive the device can be used to rotate the drill rod and the drill bit 10. the drilling Alternatively, the rod 20 of the drill bit 10 may be directly coupled to the drive shaft of the drilling motor and the drive shaft 10. as the rotary drill bit may be used to drill 10旋转,钻头上的重量或其它轴向力被施加,钻井流体通过纵向孔40以及内部流体通道(未示出)被泵送至钻头体12的面18。钻头10的旋转使得切削元件34刮削并剪切下部地层的表面。地层切削物与钻井流体混合并悬浮在其中,经过排屑槽32以及井孔和钻杆之间的环形空间流至地层的表面。常规地,包含颗粒基复合材料的钻头体,诸如前述的钻头体12, 已经使用所谓的"渗透,,工艺在石墨模具中制造。 10 is rotated, the weight or other axial force is applied on bit, drilling fluid through the longitudinal bore 40 and internal fluid passage (not shown) is pumped to the surface 18. A drill bit body 12 such that rotation of the cutting element 10 of the scraper 34 and cutting a lower surface of the formation. formation cuttings mix with the drilling fluid and suspended therein, through the flute 32 and an annular space between the wellbore and drill pipe to flow to the surface of the formation. conventionally, particulate matrix composite comprising the bit body, the bit body 12 such as have been used so-called "penetration ,, a graphite mold in the manufacturing process. 石墨模具的腔通常由多轴机床加工。 Graphite mold cavity is typically fabricated from multi-axis machine. 然后,以手持工具将细小结构特征加至石墨模具的腔。 Then, the fine structure of the hand tool wherein the graphite is added to the mold cavity. 可以将可能在有机结合剂中包括无机颗粒的附加粘土施加至模具腔内的模具表面,以及使所述粘土成形以获得模具的所需最终构造。 May be additionally may include inorganic particles of clay in an organic binding agent applied to the mold surface of the mold cavity, and forming the clay to obtain desired final configuration of the mold. 如果需要,执行元件或替换元件(其可以包括陶资材料、石墨或涂覆有树脂的经压实的砂子)可以定位在模具内,用于限定所述内部通道、切削元件凹部36、排屑槽32以及钻头体12的其它结构特征。 If desired, or alternatively the actuator element (which may comprise ceramic material resources, graphite or compacted sand coated with resin) may be positioned within the mold, for defining the inner channel, recess 36 of the cutting element, chip other structural features of the grooves 32 and 12 of the bit body. 在模腔已经被限定且替换元件根据需要定位在模具内之后,可以在模腔内形成钻头体。 Has been defined and replaced after the element needs to be positioned in accordance with the mold, the bit body may be formed within the mold cavity in the mold cavity. 石墨模具的腔被填充以硬质颗粒状的碳化物材料(诸如碳化钨、碳化钛、碳化钽等)。 Graphite mold cavity is filled with hard particulate carbide material (such as tungsten carbide, titanium carbide, tantalum carbide, etc.). 然后待加工的钢坯件16可以适当的位置和方向定位在模具内。 16 may be suitable position and orientation to be machined steel blank is then positioned within the mold. 钢坯件16可以至少部分浸没在模具内的颗粒状碳化物材料内。 The inner billet member 16 may be at least partially submerged in the particulate carbide material within the mold. 然后,模具可以被振动或者颗粒被压紧,以减小颗粒状碳化物材料的相邻颗粒之间的空间的体积。 Then, the mold may be vibrated or the particles are compacted to reduce the volume of the space between adjacent particles of the particulate carbide material. 可以使基材(通常称为"结合剂"材料)诸如铜基合金熔化或允许其渗入模腔内的颗粒状碳化物材料。 Substrate may be (commonly referred to as "binder" materials) such as a copper-based alloy is melted or allowed to penetrate the cavity of the particulate carbide material. 允许模具和钻头体12冷却以使得基材固化。 And allowing the mold to cool the bit body 12 such that the cured substrate. 在钻头体12冷却和基材固化时,钢坯件16结合至形成冠部14的颗粒基复合材料。 When the bit body 12 is cooled and solidified substrate, the billet 16 is bonded to the crown portion formed matrix composite particles 14. 一旦钻头体12已经冷却,钻头体12从模具移除,并且替换元件从钻头体12移除。 Once the bit body 12 has cooled, the bit body 12 is removed from the mold, and removed from the replaced bit body member 12. 通常需要破坏石墨模具以移除钻头体12。 Typically it requires the destruction of the graphite mold 12 to remove the bit body. 在钻头体12已经从模具移除后,PDC切削元件34可以结合至钻头体12的端面18,例如通过铜焊、机械附接或粘合附接。 After the bit body 12 has been removed from the mold, the PDC cutting elements 34 may be bonded to the end face 18 of the bit body 12, for example by brazing, mechanical attachment or adhesive attachment. 钻头体12 还可以固定至钢杆20。 12 the bit body 20 may also be fixed to a steel rod. 由于用于形成冠部14的颗粒基复合材料相对较硬且不容易被机加工,所以钢坯件16可以用于将钻头体12固定至杆20。 Since the particles for forming the crown portion 14 is relatively stiff matrix composite not easily be machined, the steel blank 16 may be used to the bit body 12 is fixed to the rod 20. 可以在钢坯件16的暴露表面上机加工出螺紋,以在钻头体12 和钢杆20之间提供螺紋连接22。 Threads can be processed on the exposed surface of the billet machine 16 to provide the bit body 12 between the threaded steel rod 20 and 22 are connected. 钢杆20可以旋至钻头体12上,然后沿着钻头体12和钢杆20之间的分界面提供焊接24。 Steel rod 20 can be screwed to the drill body 12, and the interface between the body 12 and the steel rods 24 welded along the drill bit 20 provided. 发明内容在一些实施例中,本发明包含可以用于形成诸如例如旋转式钻头、 钻心、双心钻头、偏心钻头、所谓的"扩眼钻头"以及钻井和其它向下钻进装置的其它钻地工具的钻头体的方法。 SUMMARY In some embodiments, the present invention may be used to form comprises such as a rotary drill bit, terrible, bi-center bits, eccentric bits, so-called "reamer" and other earth-boring drilling and other downhole apparatus e.g. methods bit body of the tool. 例如,根据本发明教示的方法包括:研磨多个硬质颗粒和多个包括基材的颗粒以形成研磨产物。 For example, the method according to the teachings of the present invention comprises: a plurality of abrasive particles and a plurality of hard particles comprising a substrate to form a milled product. 所述研磨产物可以包括粉末颗粒,所述粉末颗粒可以分离成多个粒度级。 The abrasive product may include powder particles, the powder particles can be separated into a plurality of levels of granularity. 所述多个粒度级中的至少两个粒度级的至少一部分可以组合以形成粉末混合物,并且所述粉末混合物可以受压以形成钻头体生坯,然后所述钻头体生坯可以至少部分地被烧结。 At least a portion of the plurality of the at least two grain size fractions may be combined in a particle size fraction to form a powder mixture and the powder mixture can be pressed to form the green bit body, then the green bit body may be at least partially sintering. 作为另一个示例,根据本发明的教示的另一方法可以包括:混合多个硬质颗粒和多个包括基材的颗粒以形成粉末混合物;以及以具有振荡幅值的压力挤压所述粉末 As another example, another method in accordance with the teachings of the present invention may comprise: mixing a plurality of hard particles and a plurality of particles comprising a substrate to form a powder mixture; and the amplitude of oscillation having a pressure pressing said powder

混合物以形成钻头体生坯。 Mixture to form a green bit body. 作为再一个示例,根据本发明的教示的另一方法可以包括:将粉末混合物压在可变形的容器内以形成钻头体生坯,以及在所述粉末混合物受压时使得液体能够从所述容器排出。 As a further example, another method according to the teachings of the present invention may include: powder mixture was pressed in a deformable container to form a green bit body, and such that when the liquid in the powder mixture can be pressed from the container discharge. 在另一实施例中,本发明包括可以用于形成此种钻头和其它工具的钻头体的系统。 In another embodiment, the present invention may comprise a system for forming such a drill bit body and other tools. 所述系统包括设置在压力腔内的可变形容器,所述可变形容器可以构造成在其内容纳粉末混合物。 The system includes a cavity disposed in a pressure deformable container, the deformable container may be configured to accommodate therein the powder mixture. 所述系统进一步包括至少一个管道,在所述可变形容器的内部和所述压力腔的外部之间提供流体连通。 The system further comprises at least one duct between the interior of the deformable outer container and said pressure chamber to provide fluid communication. 在另一些实施例中,本发明包含使用此种方法和系统形成的钻头和其它工具(诸如上述的设备)。 In other embodiments, the present invention comprises the use of such a method and system for forming a drill bit and other tools (such as the above-mentioned apparatus). 附图说明尽管说明书以权利要求书为总结,且权利要求书特别地指出并清楚地限定本发明,但是本发明的优点可以通过结合附图阅读下面的说明而更加容易地确定。 BRIEF DESCRIPTION While the specification claims is summarized, and the claims particularly pointing out and distinctly define the present invention, but the advantages of the present invention can read the following description in conjunction with the accompanying drawings be more readily determined. 在所述附图中:图l是具有包括颗粒基合成材料的钻头体的传统钻地旋转式钻头的局部剖侧^L图;图2是可以使用本发明的实施方式所教示的方法来制造的旋转式钻头的钻头体的局部剖侧视图;图3A是剖视图,示出将基本上均衡的压力施加至压力器亚或容器中的粉末混合物以由所述粉末混合物形成生坯体;图3B是图3A中示出的生坯体在从压力容器中取出后的剖视图;图3C是通过对图3B中示出的生坯体进行加工所形成的另一生坯体的剖视图;图3D是可以通过对图3C中示出的生坯体进行局部烧结而形成的褐色坯体的剖视图;图3E是可以通过对图3D中示出的褐色坯体进行加工而形成的另一褐色坯体的剖视图;图3F是图3E中示出的褐色坯体的剖视图,示出定位在切削元件8 In the drawings: Figure l is a partial cross-sectional side has a bit body comprising a particle-matrix composite material of a conventional earth-boring rotary drill bit ^ L; Figure 2 is an embodiment of the present invention may be used in the method as taught manufactured local bit body of a rotary drill bit sectional side view; FIG. 3A is a sectional view illustrating the substantially uniform pressure applied to a pressure vessel or an alkylene powder mixture to form a green body from said powder mixture; FIG. 3B is a cross-sectional view of Figure 3A is shown in the green body is removed from the pressure vessel; FIG. 3C is a cross-sectional view of another green body by processing green body shown in FIG. 3B formed out; FIG. 3D is a cross-sectional view of a brown body by partial sintering the green body shown in FIG. 3C is formed out; cross-sectional view of another brown body 3E is formed may be processed by FIG. 3D brown body shown ; FIG 3F is a cross-sectional view of the brown body shown in FIG. 3E shows the cutting element 8 is positioned

凹部中的、根据本发明教示的置换构件;图3G是可以通过将图3F中示出的褐色坯体烧结至所需最终密度而形成的钻头体的剖视侧视图,且示出切削元件凹部中的置换构件;图3H是图3G中示出的钻头体在将替换元件从切削元件凹部移除后的剖视侧视图;图4的图表示出了施加至粉末混合物的振动的峰值加速度与得到的粉末混合物最终密度之间的潜在关系的示例;图5A-5C的图表示出在以粉末混合物形成钻地旋转式钻头的钻头体时可以将压力施加至粉末混合物的方法的示例;图6是可以通过将切削元件固定在图3H所示钻头体的切削元件凹部中、以及通过将所述钻头体固定至钻头接头部分以附接至钻柱而形成的钻地旋转式钻头的局部剖侧视图。 Recess, according to the present invention is replacement member teachings; FIG. 3G is by a cross-sectional side view of the drill bit body in FIG. 3F brown body shown sintered to a desired final density is formed, and shows the cutting element recesses the displacement member; FIG. 3G, 3H are diagrams illustrating the bit body shown in cross-sectional side view of the alternative element after removal from the recessed portion of the cutting element; FIG. 4 graphically illustrates peak acceleration of vibration applied to the powder mixture and examples of potential relationship between the density of the final powder mixture is obtained; FIGS. 5A-5C shown in FIG pressure may be exerted on the drill bit to form a powder mixture boring rotary drill bit body to a powder mixture of an example method; FIG 6 It is secured by the cutting element of the cutting element as shown in the bit body recess portion in FIG. 3H, and by the local fixed to the drill bit body is attached to the head portion to the drill string formed by earth-boring rotary drill bit sectional side view. 具体实施方式文中的图示并不意味是任何特定材料、装置、系统或方法的具体图示,而仅仅是用于描述本发明。 DETAILED embodiment illustrated embodiments herein are not meant to imply any particular material specifically illustrated, apparatus, system or method, but are merely used to describe the present invention. 另外,附图之间共同的要素可以采用相同的数字标号。 Additionally, elements common between figures may be employed like numerals. 文中所使用的术语"生"意指未烧结。 As used herein the term "green" means an unfired. 文中所使用的术语"钻头体生坯"意指未烧结结构,其包括由粘合材料保持在一起的多个离散颗粒,所述结构的尺寸和形状允许通过包括但不限于机加工和致密化的后续制造过程而以所述结构形成适用于钻地钻头中的钻头体。 The term "green bit body" as used herein means an unsintered structure comprising a plurality of discrete particles held together by the adhesive material, the size and shape of the structure allows include but are not limited to machining and densification the subsequent manufacturing processes to form a structure suitable for the earth-boring bit body of the drill bit. 文中所使用的术语"褐色"意指部分烧结。 As used herein the terms "brown" means partially sintered. 文中所述使用的术语"褐色钻头体,,意指部分烧结的结构——其包括多个颗粒,其中至少部分颗粒已经部分烧结在一起以提供临近颗粒之间的至少部分结合,所述结构的尺寸和形状允许通过包括但不限于机加工和进一步致密化的后续制造过程而以所述结构形成适用于钻地钻头中的钻头体。褐色钻头体例如可以通过对钻头体生坯进行部分烧结而形成。 The term "brown bit body described herein used means a partially sintered structure ,, - which comprises a plurality of particles, wherein at least a portion of the particles have partially sintered together to provide a bond between adjacent particles at least partially, of the structure sized and shaped to allow a subsequent manufacturing processes including, but not limited to, machining and further densification to form a bit body suitable for earth-boring drill bit to the structure brown bit body, for example by partially sintering the green bit body and form.

文中所使用的术语"烧结"意指颗粒成分的致密化——涉及去除最初颗粒之间的至少一部分孔隙(伴随着收缩),并且还涉及临近颗粒之间的合并和结合。 As used herein the term "sintering" means densification of a particulate component - relates to the removal of at least a first portion of the pores between the particles (accompanied by shrinkage), and also to the consolidation and bonding between adjacent particles. 文中所使用的术语"[金属】基合金"(其中[金属l是任何金属)除了指金属合金之外还包括商业意义上的纯[金属】,其中合金中的【金属】 的重量百分比大于合金中任何其它成分的重量百分比。 The term herein used "[Metal] based alloy" (where [metal l is any metal) in addition refers to addition to the metal alloy further includes a pure [metal] in the commercial sense, wherein the alloy [metal] is the weight percentage is greater than Alloy the weight percentage of any other component. 文中所使用的术语"材料组分"意指材料的化学组分和微结构。 Chemical composition and microstructure as used herein the term "material component" means a material. 换句话说,具有相同化学组分但微结构不同的材料看作是具有不同的材料组分。 In other words, having the same chemical composition but a different microstructure are considered material having different material compositions. 文中所使用的术语"碳化鴒"意指含有鴒和碳的化学化合物(例如,WC、 W2C、以及WC和W2C的组合)的任何材料组分。 Any material components used herein the term "carbonization ling" is meant a chemical compound containing ling and carbon (e.g., WC, W2C, and combinations of WC and W2C) is. 碳化鴒包括例如铸造碳化鵠、烧结碳化鵠、以及微晶碳化鵠。 E.g. comprising carbonized ling Hu cast carbide, sintered carbide, Hu, Hu and microcrystalline carbonized. 随着浅深度含碳氢化合物地层持续减少,待钻的钻井深度持续增加。 With the shallow depth hydrocarbon containing formation continued to decrease, continued to increase the drilling depth to be drilled. 这些不断增加的钻井深度使得传统钻头在性能和耐久性上达到器极限。 These increased drilling depth is reached that limit a conventional drill bit performance and durability. 经常需要数个钻头来钻一个钻井,而更换钻杆上的钻头不论是是成本高昂的。 Often requires several drill bit to a drilling, drill bit and drill string to replace either cost prohibitive. '、当前在开发新的颗粒基(particle -matrix )复合材料以改善钻地旋转式钻头的性能和耐久性。 ', The development of new particles in the current group (particle -matrix) composite material to improve the earth-boring rotary drill bit performance and durability. 此外,包括这些新的颗粒基复合材料中的至少一些的钻头体可以前述渗透工艺之外的其它方法来形成。 In addition, these new particle-comprising composite material of at least some of the bit body may be a method other than the aforementioned process to form the permeate. 作为示例而非限制,包括新的颗粒基复合材料的钻头体可以采用粉末压制和烧结技术来形成。 By way of example and not limitation, including new particle-composite bit body may be formed using powder compaction and sintering techniques. 此种技术的例子在于2005年11月10日申请的待决美国专利申请第11/271,153号和也于2005年11月10日申请的待决美国专利申请第11/272,439号中公开。 Examples of such techniques is that the November 10, 2005 filed pending US Patent Application No. 11 / 271,153 and also be on November 10, 2005 filed pending US Patent Application Publication No. 11 / 272,439. 可以使用粉末压制和烧结技术形成的钻头体50的一个示例实施例在图2中示出,如图中所示,钻头体50类似于先前参照图l描述的钻头体12,并且可以包括由排屑槽32分隔的翼或刃30、纵向孔40、 以及多个切削元件34 (诸如,例如PDC切削元件)——其可以固定在钻头体12的钻头端面52上的切削元件凹部中。 One example may use powder pressing and sintering technique for forming a bit body 50 of the embodiment illustrated in FIG. 2, as shown in FIG bit body 50 similar to that previously described with reference to Figure l of the bit body 12, and may include a row flutes 32 separated by wings or blades 30, longitudinal bore 40, and a plurality of cutting elements 34 (such as, for example, PDC cutting element) - which can be fixed to the drill bit body 12 of the cutting member end surface 52 of the recess. PDC切削元件34 PDC cutting elements 34

可以由支持部38从后面支撑,支持部38可以与钻头体50成一个整体。 Support portion 38 supported from the rear by the support portion 38 may be a drill bit body 50 as a whole. 钻头体50可以不包括诸如图1中所示钻头体12的钢坯件16之类的钢坯件。 The bit body 50 may not include a steel blank, such as a drill bit body shown in FIG. 16 or the like of the slab 12. 在一些实施方式中,钻头体50可以主要或基本上由颗粒基复合材料54组成。 In some embodiments, the bit body 50 may be substantially or essentially of particulate composite material composed of 54 groups. 尽管在图2中没有示出,但是钻头体50还可以包含在钻头体50的钻头端面52和纵向孔40之间延伸的内部流体通道。 Although not shown in FIG. 2, the bit body 50 may also be included in the bit face of the bit body 52 and a longitudinal bore 50 extending between the internal fluid passageway 40. 还可以在钻头体50的钻头端面52处在此种内部流体通道中设置喷嘴嵌件(未示出)。 The bit body 50 may also end surface 52 in the internal fluid passage is provided such a nozzle insert (not shown) in the drill bit. 如前所述,钻头体50可以使用粉末压制和烧结技术形成。 As previously mentioned, the bit body 50 may be formed using powder compaction and sintering techniques. 下面简要描述此种技术的一个非限制性示例。 A non-limiting example of such technology is described briefly below. 参见图3A,示出一个可以挤压粉末混合物的系统。 3A, the system shows a powder mixture may be extruded. 该系统包括压力腔70和可设置在压力腔70中的可变形容器62。 The system comprises a deformable container 62 and the pressure chamber 70 may be disposed in the pressure chamber 70. 该系统进一步包括一个或多个管道75,所述管道75提供的可变形容器62的内部和压力腔70的外部之间的流体连通,这一点在下文详细描述。 The system further comprises one or more conduits 75, fluid communication between the exterior of the conduit 75 provides a deformable inner container 62 and the pressure chamber 70 communicates, which described in detail below. 粉末混合物60可以在可变形容器62中被基本上均勻的压力挤压。 The powder mixture 60 may be pressed in a substantially uniform pressure of the deformable container 62. 粉末混合物60可以包括多个硬质颗粒以及多个包含基材的颗粒。 The powder mixture 60 may include a plurality of hard particles and a plurality of particles comprising the substrate. 作为示例而非限制,所述多个硬质颗粒可以包括诸如金刚石、碳化硼、氮化硼、氮化铝以及W、 Ti、 Mo、 Nb、 V、 Hf、 Zr、 Si、 Ta和Cr的碳化物或硼化物。 By way of example and not limitation, the plurality of hard particles may include carbide such as diamond, boron carbide, boron nitride, aluminum nitride, and W, Ti, Mo, Nb, V, Hf, Zr, Si, Ta and Cr or boride. 类似地,基材可以包括钴基合金、铁基合金、镍基合金、钴镍基合金、铁镍基合金、铁钴基合金、铝基合金、铜基合金、 镁基合金或钛基合金。 Similarly, the substrate may include a cobalt-based alloy, iron-based alloys, nickel-based alloys, cobalt and nickel-based alloys, iron-nickel-based alloys, iron-cobalt-based alloys, aluminum based alloys, copper based alloys, magnesium-based alloy or a titanium-based alloy. 可选地,粉末混合物60可以进一步包括在挤压粉末混合物时通常使用的添加剂,诸如,例如用于对被压的粉末组分提供结构强度的结合剂;用于使结合剂更加柔顺的增塑剂;以及用于降低颗粒间摩擦及在挤压期间提供润滑的润滑剂或压制辅辅助剂。 Alternatively, the powder mixture 60 may further include additives commonly used when pressing powder mixtures such as, for example, to provide structural strength of the binding agent on the powder components are pressed; binding agent for plasticizing more supple agent; and for reducing the friction between the particles and providing a lubricant or lubricating agent during pressing auxiliary extrusion aid. 在采用本发明教示的一些方法中,粉末混合物60可以包含选定的多种颗粒尺寸分布。 In some methods using the teachings of the present invention, the powder mixture 60 may comprise a plurality of selected particle size distribution. 通过使用选定的多种颗粒尺寸分布,可以控制在后续烧结过程中出现的收缩量。 By using a plurality of selected particle size distribution can be controlled amount of shrinkage occurring in the subsequent sintering process. 例如,通过使用选定的多种颗粒尺寸分布,可以选择性地降低或增加在后续烧结过程中出现的收缩量。 For example, by using a plurality of selected particle size distribution, it may be selectively increase or decrease the amount of shrinkage occurring in the subsequent sintering process. 此外,通过使用选定的多种颗粒尺寸分布,可以改善在后续烧结过程中出现的收缩一致性与均匀性。 Further, by using a plurality of selected particle size distribution, it can improve the consistency and uniformity of the shrinkage occurs in the subsequent sintering process. 换句话说,通过在粉末混合物60中提供选定的多种颗粒尺寸分布,可以减小在后续烧结过程中出现的钻头体的非均匀性扭曲。 In other words, by providing a selected plurality of the powder mixture 60 particle size distribution, non-uniformity can be reduced distortion occurring in the bit body during subsequent sintering. 由于在烧结期间的收缩至少部分地依据由粉末混合物60形成的生组分中的内部孔隙率(颗粒之间的间隙空间)而变化,从而可以选择多种颗粒尺寸分布来在粉末混合物60中提供减小的或最小量的颗粒间隙空间。 Since the internal porosity (interstitial spaces between the particles) in the green component shrinkage during sintering is at least partially formed from a powder based mixture 60 changes, so that a variety of particle size distribution may be selected to provide a powder mixture 60 reduced or minimal amount of interstitial space particles. 例如,可以选择具有第一平均颗粒尺寸(例如,直径) 的第一粒度级。 For example, you may be selected having a first average particle size (e.g., diameter) of a first size fraction. 可以选择具有第二平均颗粒尺寸——其是第一平均颗粒尺寸的几分之一——的第二粒度级。 May be selected having a second average particle size - which is one of the first average particle size fraction - a second level of granularity. 根据需要或期望,可以重复上面的过程,以在粉末混合物60中提供任何数量的选定的粒度级以降低或最小化粉末混合物60中的初始孔隙率(或间隙空间的体积)。 Necessary or desired, the above process may be repeated to provide any number of selected particle size in the powder mixture 60 stages to reduce the initial porosity (or volume of the interstitial spaces) 60 or minimized powder mixture. 在一些实施例中,第一平均颗粒尺寸与第二平均颗粒尺寸的比(或任何其它最接近的粒度级之间的比)可以在大约5至大约20之间。 In some embodiments, the ratio of the first average particle size and second average particle size (or between any other than the nearest grain fractions) may be between about 5 to about 20. 作为示例而非限制,可以通过提供多个硬质颗粒以及多个包括基材的颗粒而制备粉末混合物60。 By way of example and not limitation, by providing a plurality of hard particles and a plurality of prepared powder mixture comprising particles of a substrate 60. 所述多个硬质颗粒以及多个包括基材的颗粒可以经过碾磨过程,诸如经过例如球磨研磨过程或棒磨过程。 The plurality of hard particles and a plurality of particles comprising a substrate may be subjected to the milling process, such as for example ball milling process or a process through the rod mill. 此种过程例如可以使用球、棒或超微碾磨机而进行。 Such processes can be carried out, for example, using a ball, a rod mill or ultra. 在本文中,术语"碾磨"在用于与"碾磨多个颗粒"相关的描述时,其不同于传统的碾磨机操作,其意指其中颗粒及任何可选添加物混合在一起而获得基本上均匀的混合物的过程。 As used herein, the term "grinding" as used with "a plurality of grinding particles" related description, which is different from the conventional mill operation, which means wherein the particles and any optional additives are mixed together and process to obtain a substantially homogeneous mixture. 作为非限制的示例,所述多个硬质颗粒以及多个包括基材的颗粒可以混合在一起并且悬浮在液体中以形成浆料,该浆料可以在大致圆柱形的碾磨容器中提供。 As a non-limiting example, the plurality of hard particles and a plurality of particles comprising a substrate may be mixed together and suspended in a liquid to form a slurry, the slurry may be provided in a generally cylindrical milling container. 在一些方法中,研磨介质还可以与所述浆料一起提供在碾磨容器中。 In some methods, the grinding media may also be provided in the milling container together with the slurry. 研磨介质可以包括离散的球、 小丸、棒等,包括相对硬的材料并且在尺寸上显著地比待碾磨的颗粒(即所述硬质颗粒以及包括基材的颗粒)大。 Grinding media may comprise discrete balls, pellets, rods, comprising a relatively hard material and significantly in size than the particles to be milled (i.e., the hard particles comprising particles and a substrate) is greater. 在一些方法中,研磨介质和/或碾磨容器可以与硬质颗粒和/或基材的材料相同或基本上类似的材料制成,这可以降低对所制备的粉末混合物60的玷污。 In some methods, grinding media and / or the milling container may be made of the hard particles and / or the same or substantially similar material for the base material, which may reduce contamination of the powder mixture 60 is prepared. 然后,碾磨容器可以旋转以使得浆料及可选的研磨介质在碾磨容器内一起被碾轧或研磨。 Then, the milling container may be rotated so that the slurry and the optional grinding media to be rolled or ground together in a grinding the mill container. 碾磨过程可以使得所述多个硬质颗粒以及多12 The milling process may be such that the plurality of hard particles and a plurality of 12

个包括基材的颗粒的颗粒尺寸改变。 A substrate comprising particles of a particle size change. 碾磨过程还可以使得硬质颗粒至少部分地被涂覆上相对较软的基材层。 Milling process may also cause the hard particles are at least partially relatively soft coating on the substrate layer. 在碾磨后,可以将浆料从碾磨容器去除并将之与研磨介质分离。 After milling, the slurry may be removed from the grinding and polishing of the separation medium in the container. 然后浆料中的固体颗粒可以从液体分离。 Then the solid particles in the slurry can be separated from the liquid. 例如,浆料中的液体成分可以被蒸发,或者固体颗粒可以从浆料中过滤出来。 For example, the liquid components of the slurry may be evaporated, or the solid particles may be filtered from the slurry. 在从浆料中去除固体颗粒后,固体颗粒可以经受颗粒分离过程, 该过程被设计用来将固体颗粒分成对应不同颗粒尺寸范围的不同部分。 After removing the solid particles from the slurry, the solid particles may be subjected to a particle separation process that is designed to the solid particles into different sections corresponding to the different particle size range. 作为示例而非限制,可以通过使颗粒经受筛选过程而将固体颗粒分成相应的粒度级,其中,可以使得固体颗粒依序通过一系列的筛网。 By way of example and not limitation, the particle can be obtained by subjecting the screening process the solid particles into the appropriate level of granularity, wherein the solid particles can be made sequentially through a series of screens. 各筛网可以包括尺寸基本上一致的开口,且各筛网中的筛网开口的平均尺寸可以在流经这一系列筛网的流动方向上减小。 Each screen may include a substantially uniform size of the opening, and the average size of the screen openings in each screen may decrease in the flow direction through the series of screens. 换句话说,这一系列篩网中的第一筛网可以具有这一系列筛网中最大的平均开口尺寸,并且这一系列筛网中的最后一个筛网可以具有这一系列筛网中最小的平均开口尺寸。 In other words, the first series of sieve screens may have the largest average opening size in the series of screens, and this last series of sieve screens may have the smallest sieve series the average opening size. 当使固体颗粒经过这一系列筛网时,各颗粒被捕获在平均开口尺寸小到不允许相应颗粒经过相应筛网的篩网上。 When the solid particles through the series of screens, each particle is trapped in a small average opening size corresponding particles allowed through the respective screen mesh. 结果, 在筛选过程之后,在各筛网上可以收获一定量的颗粒,所述颗粒对应于特定的粒度级。 As a result, after the screening process, each of the sieve can be harvested in an amount of particles which corresponds to a particular level of granularity. 在采用本发明教示的其它方法中,可以使用不同于筛选方法的方法将所述颗粒分离成多种粒度级,例如使用空气分级方法和淘选方法。 In another method of the present invention teachings can be used a method other than the screening method of separating the particles into a plurality of levels of granularity, for example, air classification methods and panning methods. 作为一个特定的非限制示例,固体颗粒可以被分离成提供四个分开的粒度级。 As a specific non-limiting example, the solid particles may be separated to provide four separate particle size fraction. 第一粒度级可以具有第一平均颗粒尺寸,第二粒度级可以具有大致为第一平均颗粒尺寸的七分之一的第二平均颗粒尺寸,第三粒度级可以具有大致为第二平均颗粒尺寸的七分之一的第三平均颗粒尺寸,第四粒度级可以具有大致为第三平均颗粒尺寸的七分之一的第四平均颗粒尺寸。 First fraction may have a first average particle size, the second particle size fraction may have a second average particle size of approximately one-seventh the first average particle size, the third fraction may have a second average particle size of approximately the average particle size of the third one-seventh, fourth particle size fraction may have a fourth average particle size of approximately one-seventh the third average particle size. 例如,第一平均颗粒尺寸(例如,平均直径)可以是大约500微米(500nm),第二平均颗粒尺寸可以是大约70微米(70nm),第三平均颗粒尺寸可以是大约10微米(lOjim),第四平均颗粒尺寸可以是大约1微米(ljim)。 For example, the first average particle size (e.g., average diameter) may be about 500 microns (500 nm), a second average particle size may be about 70 microns (70nm), the third average particle size may be about 10 microns (lOjim), fourth average particle size may be about 1 micron (ljim). 然后四个粒度级各自的至少一部分可以组合以提供颗粒混合物60。 Then four grain size fractions of at least a portion of each may be combined to provide a particulate mixture 60. 例如,第一粒度级可以包括粉末混合物60的大约百分之六十(60% ,重量百分比),第二粒度级可以包括粉末混合物60的大约百分之二十五(25%,重量百分比),第三粒度级可以包括粉末混合物60的大约百分之十(10%,重量百分比),第四粒度级可以包括粉末混合物60的大约百分之五(5%,重量百分比)。 For example, the first size fraction 60 may comprise a powder mixture of approximately sixty percent (60% by weight), the second particle size fraction may comprise about twenty-five percent of the powder mixture 60 (25% by weight) , the third particle size fraction may comprise about ten percent (10% by weight) of the powder mixture 60, the fourth particle size fraction 60 may comprise a powder mixture of approximately five percent (5% by weight). 在其它的实施例中,粉末混合物60可以包括其它的重量百分比分布。 In other embodiments, the powder mixture 60 may comprise other weight percent distributions. 继续参考图3A,容器62可以包含流体密封的可变形构件64。 With continued reference to Figure 3A, container 62 may comprise a fluid-tight deformable member 64. 例如,流体密封的可变形构件64可以是包括可变形聚合物材料的基本上为圆柱形的袋。 For example, fluid-tight deformable member 64 may be a deformable polymeric material comprising a substantially cylindrical bag. 容器62可以进一步包括基本上为刚性的密封板66。 Container 62 may further comprise a substantially rigid sealing plate 66. 可变形容器64例如可以由诸如橡胶、氯丁橡胶、硅树脂或聚氨酯的弹性体形成。 The deformable container 64 may be formed of an elastic material such as rubber, neoprene, silicone, or polyurethane. 可变形容器64可以被填充以粉末混合物60。 The deformable container 64 may be filled with the powder mixture 60. 在可变形容器64被填充以粉末混合物60之后,粉末混合物60 可以被振动以提供粉末混合物60在可变形容器64内的均勻分布。 The deformable container 64 is then filled with the powder mixture 60, the powder mixture 60 may be vibrated to provide a uniform distribution of the powder mixture 60 within the deformable container 64. 振动可以包括如下特征:例如振动的幅值以及峰值加速度。 Vibration may include the following features: the vibration amplitude, for example, and the peak acceleration. 作为示例而非限制,粉末混合物60可以经受幅值在大约0.25毫米和2.50毫米之间、峰值加速度在大约二分之一重力加速度和大约五倍重力加速度之间的振动。 By way of example and not limitation, the powder mixture 60 may be subjected to between about 0.25 mm and 2.50 mm, the peak acceleration vibration amplitude between about one-half the acceleration of gravity and about five times the acceleration of gravity. 对于任何颗粒粉末混合物60,可以在使粉末承受特定振动幅值、各种峰值加速度的振动之后,测量得到的或最终的粉末密度。 For any particulate powder mixture 60, the powder may be subjected to a specific vibration amplitude, the vibration after the peak acceleration variety of measured or final powder density. 所获得的结果数据可以用于提供类似于图4的图表。 Results obtained can be used to provide a graph similar to Figure 4. 如图4中所示, 对于特定的粉末混合物60,可以有最优峰值加速度100,以及导致最大的或增加的最终粉末密度102的振动幅值。 As shown in FIG. 4, for a particular powder mixture 60, there may be an optimal peak acceleration 100, and results in a maximum or increased final powder density vibration amplitude 102. 结果,通过使用振动和最优峰值加速度压紧特定粉末混合物60,可以在粉末混合物60中获得增加的或最优的最终粉末密度。 As a result, by using the vibration and the optimum specific peak acceleration of pressing the powder mixture 60 may be increased or obtained optimal final powder density in the powder mixture 60. 对于各种振动幅值可以执行类似的测试,以识别导致增加的或最优的最终粉末密度的振动幅值。 For the various vibration amplitude may perform similar tests to identify the cause of the increased vibration amplitude or optimum final powder density. 结果,粉末混合物60可以在振动幅值和峰值施加速度的最优组合下振动,以在粉末组合物60中提供最大或最佳的最终粉末密度。 As a result, the powder mixture 60 may be applied at the optimal combination of the vibration velocity and vibration amplitude at the peak, to provide maximum or optimum final powder density in the powder composition 60. 通过在粉末组合物60中提供最大或最佳的最终粉末密度,在后续烧结过程中出现的任何收缩可以被减小或最小化。 By providing a maximum or optimum final powder density in the powder composition 60, any shrinkage occurring in the subsequent sintering process may be reduced or minimized. 此外,通过在粉末组合物60中提供最大或最佳的最终粉末密度,可以改善此种收缩的均匀性,这可以在收缩时提供增加的尺寸精度。 Further, by providing a maximum or optimum final powder density in the powder composition 60 can improve the uniformity of such shrinkage, which may provide increased dimensional accuracy upon shrinking.

再次参见图3A,在可变形构件64内可以设置至少一个嵌件或置换构件68,用于限定钻头体50 (图2)的特征,诸如,例如限定纵向孔40。 Referring again to Figure 3A, may be provided within the deformable member 64 may be at least one insert or displacement member 68 for defining features of the bit body 50 (FIG. 2), such as, for example, defining a longitudinal bore 40. 替代性地,可以不使用置换构件68,而在后续过程中采用传统机加工方法形成纵向孔40。 Alternatively, the displacement member 68 may not be used, the longitudinal bore 40 is formed using conventional machining methods in a subsequent process. 然后密封板66可以附接或粘接至可变形构件64,以在其间提供流体密封。 Then the sealing plate 66 may be attached or bonded to deformable member 64, to provide a fluid seal therebetween.

容器62 (带有粉末混合物60以及任何容纳在其内的所需的置换构件68)可以设置在压力腔70内。 Container 62 (with the powder mixture 60 and any desired displacement members 68 housed therein) may be disposed within the pressure chamber 70. 可以使用可移除盖71来提供至压力腔70内部的进出路径。 Removable cap 71 may be used to provide a path out to the interior of the pressure chamber 70. 使用泵(未示出)在高压下将气体(诸如, 例如空气或氮气)或基本上不可压缩的流体(诸如,例如水或油)通过开口72泵送至压力腔70内。 Using a pump (not shown) at a high pressure gas (such as, for example, air or nitrogen) or a substantially incompressible fluid (such as, for example, water or oil) is pumped into the pressure chamber 70 through the opening 72. 气体或流体的高压使得可变形容器64 的壁变形。 A high pressure gas or fluid such that deformation of the walls 64 of the deformable container. 流体压力可以基本上均匀的传递至粉末混合物60。 Fluid pressure may be transmitted substantially uniformly to the powder mixture was 60.

粉末混合物60的此种均匀加压可以形成图3B中示出的粉末部件生坯或生坯体80,在加压后,生坯体80可以从压力腔70和容器62 移除。 Such powder mixture 60 may form a uniform powder pressing member shown in FIG. 3B green or green body 80, after pressing, the green body 80 may be removed from the pressure chamber 70 and the container 62.

当流体通过开口72被泵送至压力腔70内以增加压力腔70内的压力时,压力可以随着时间线性地增加至选定的最大压力。 When increasing the pressure in the pressure chamber 70 through the fluid 70 within the opening 72 is pumped to the pressure chamber, the pressure may be increased to a selected maximum pressure linearly with time. 在其它方法中,压力可以随着时间非线性地增加至选定的最大压力。 In other methods, the pressure may increase non-linearly with pressure to a selected maximum time. 图5A示出可以增加压力腔70内压力的方法的再一示例。 5A shows another exemplary method may increase the pressure in the pressure chamber 70. 如图5A所示,可以4吏得压力在整体向上增加的情况下上下振荡。 FIG, 4 officials can oscillate up and down pressure obtained in the case of increasing the overall upward in FIG. 5A. 也如图5A所示,压力波形可以具有基本上正弦或平滑的曲线形式。 As shown in FIG. 5A, the pressure waveform may have a smooth curve or a substantially sinusoidal form. 参见图5B,在其它方法中, 压力波形可以不具有基本上平滑的曲线形式,而是可以随着压力在整体向上趋势下上下振荡而具有多个相对尖锐的峰和谷。 Referring to Figure 5B, in other methods, the pressure waveform may not have a substantially smooth curved form, but can oscillate up and down as the pressure in the overall upward trend of having a plurality of relatively sharp peaks and valleys. 在另一其它方法中,可以使得压力上下振荡从而对于选定的时间阶段不具有任何整体向上的趋势,在该时间阶段之后,压力可以增加至所需的最大压力, 如图5C中所示。 In still other methods may be shaken up and down so that the pressure for a selected period of time does not have any overall upward trend, after which period of time, the pressure may be increased to a desired maximum pressure, as shown in FIG 5C.

在一些实施例中,图5A-5C中示出的振荡的频率可以在大约每秒一个周期(l赫兹)和大约每秒100周期(IOO赫兹)之间(一个周期定义为图中相邻波峰之间限定的部分)。 In some embodiments, the frequency of oscillation shown in FIG. 5A-5C may be adjacent peaks as in FIG. (A defined period of between about one cycle per second (hertz L) and about 100 cycles per second (IOO Hz) defined between portions). 此外,在一些实施例中,振荡的平均幅值可以在大约千分之六兆帕(0.006MPa)和大约六十九兆帕(69MPa)之间。 Further, in some embodiments, the average amplitude of the oscillation may be between approximately six thousandths MPa (0.006 MPa for) and about sixty-nine megapascals (69MPa).

通过使容器62内的粉末混合物60承受如上所述的压力振荡,在粉末混合物60中挤压获得的最终密度可以增加。 By the powder mixture 60 in the container 62 subjected to pressure oscillations as described above, the final density in the powder mixture 60 may be increased to obtain extruded. 此外,通过使得容器62内的粉末混合物60承受压力振荡,可以增加粉末混合物60中颗粒挤压的均勻性。 Further, by making the powder mixture 60 in the vessel 62 under pressure oscillations can increase the uniformity of the powder mixture is extruded in granules 60. 换句话说,通过使施加至粉末混合物60的压力振荡, 可以减小粉末部件生坯或生坯体80中的任何密度梯度。 In other words, by making the pressure applied to the powder mixture 60 oscillations may be reduced in any density gradient in the green body member 80 powder or green body. 通过减小粉末部件生坯或生坯体80中的任何密度梯度,在后续烧结过程期间粉末部件生坯或生坯体80可以具有更好的尺寸精度。 By reducing the green powder component or green body 80 of any density gradient, during a subsequent sintering process the green powder component or green body 80 may have better dimensional accuracy.

如上所述,粉末混合物60可以包含一个或多个添加物,诸如例如粘接剂,用于对经挤压的粉末部件提供结构强度;可以包含增塑剂, 用于使得粘接剂更加柔顺;可以包含润滑剂或挤压辅助剂,用于减小颗粒间摩擦以及在加压期间提供润滑。 As described above, the powder mixture 60 may comprise one or more additives, such as adhesive, for example, for providing structural strength to the pressed powder component through; may comprise a plasticizer, such an adhesive for more supple; It may include a lubricant or pressing aid, for reducing inter-particle friction and providing lubrication during pressing. 当粉末混合物60在压力腔70 内的容器62内被加压时,这些添加物可以限制粉末混合物60在容器62内被挤压或致密化的程度。 When the powder mixture 60 is pressurized within the container 62 within the pressure chamber 70, these additives may limit the extent of the powder mixture 60 within the container 62 is compressed or densified.

如图3A中所示,可以在容器62中设置一个或多个端口或开口74。 As shown in FIG. 3A may be provided one or more ports or openings 62 in the container 74. 例如,可以在密封板66中设置一个或多个开口74。 For example, the sealing plate can be provided a plurality of openings 66 or 74. 开口74可以通过管道75 (例如软管或管子)连接至出口和或容器(未示出)。 May be connected to the outlet opening 74 and or container (not shown) through a conduit 75 (such as a hose or tube). 管道75 提供可变形容器62的内部区域和压力腔70的外部之间的流体连通, 以及当压力被施加至可变形容器62的外表面上时使得液体可以从可变形容器62排出。 Deformable conduit 75 providing fluid communication between the container 62 and the outer region of inner pressure chamber 70 is communicated, and when pressure is applied to the outer surface 62 of the deformable container so that the liquid may be expelled from the deformable container 62. 可选地,可以使用一个或多个阀76来控制通过开口74和管道至出口和/或容器的流动,和/或控制管子内的压力。 Alternatively, one or more may be used to control the valve 76 and through the opening 74 and to conduit / flow container, and / or the pressure in the outlet pipe or control. 作为示例而非限制,所述一个或多个阀76可以包含流量控制阀和压力控制阀。 By way of example and not limitation, the one or more valves 76 may include a flow control valve and pressure control valve.

当粉末混合物60在压力腔70内的容器62内被加压时,粉末混合物60中的添加物可以由于施加至粉末混合物的热量而液化。 When the powder mixture 60 is pressurized within the container 62 within the pressure chamber 70, the powder mixture 60 may be additive due to the heat applied to the powder mixture is liquefied. 如图3A 中管道75内的方向箭头所示,由于容器62内部和压力腔70外部之间的压力差,至少部分所述液化的添加物可通过开口74和管道75从粉末混合物60中流走。 In the direction of the arrow in conduit 75 as shown in FIG. 3A, the pressure between the inner container 62 and outer chamber 70 pressure difference, at least partially liquefied additives through the opening 74 and the pipe 75 away from the powder mixture 60 flowing . 在一些实施方式中,可以将真空施加至管道75 In some embodiments, a vacuum may be applied to the conduit 75

可以利于过量的液化添加物从粉末混合物60去除。 Can facilitate excess liquefied additives from the powder mixture 60 is removed. 所述一个或多个阀76可以用于选择性地控制何时允许液化添加物从容器62流走,以及允许从容器62流走的液化添加物的量。 The one or more valves 76 may be used to selectively control when the liquefied additives allowed to flow away from the container 62, and allowing the amount of the liquefied additive flow away from the container 62.

在一些实施方式中,粉末混合物60中的添加物可以选择为具有临近(例如大约二十摄氏度范围之内)环境温度(即大约二十二摄氏度) 的熔点,以利于过量添加物随着粉末混合物60在可变形容器62内被加压而排出。 In some embodiments, the additives in the powder mixture 60 may be selected to have a near (e.g., within a range of about twenty degrees Celsius) ambient temperature of the melting point (i.e. about two-two degrees Celsius) to facilitate an excess of additives with the powder mixture 60 in the deformable container 62 is pressurized and discharged. 例如,粉末混合物中的一种或多种添加物的熔化温度可以在大约二十五摄氏度(25。C)和大约五十摄氏度(50C)之间。 For example, the powder mixture of one or more of the melting temperature of the additive may be about twenty-five degrees Celsius (25.C) and about fifty degrees Celsius (50 C) between. 作为一个特定的非限制性示例,粉末混合物60中的添加物可以选择为包含1 - 4 -癸醇(C14H3。0 )——其熔点在大约三十五摄氏度(35。C ) 和大约三十九摄氏度(39'C)之间。 As a specific non-limiting example, the powder mixture 60 may be selected to contain the additive 1--4-- decanol (C14H3.0) - a melting point of about thirty five degrees Celsius (35.C) and about thirty nine degrees Celsius (39'C) between.

在允许或使得过量的液化添加物从粉末混合物60去除之后,可以使得留在粉末混合物60中的液化添加物固化。 After allowing such excess or liquefied additive is removed from the powder mixture 60, the liquefied additives that may remain in the powder mixture 60 to solidify. 例如,粉末混合物60 可以冷却以使得留在粉末混合物60中的液化添加物固化。 For example, the powder mixture 60 may be cooled so that the liquefied additives remaining in the powder mixture 60 to solidify.

作为可以用来在压力腔70中加热和/或冷却粉末混合物60的方法的一个示例,可以设置热交换器(未示出)与压力腔70的外表面直接物理接触。 As exemplary methods can be used in a pressure chamber and / or cooling of the powder 70 in the heated mixture 60, a heat exchanger may be provided (not shown) in direct physical contact with the outer surface 70 of the pressure chamber. 例如,可以使得经加热的流体流经热交换器以加热压力腔70以及粉末混合物60,以及可以使得经冷却的流体流经热交换器以冷却压力腔70以及粉末混合物60。 For example, such that the heated fluid through the heat exchanger to heat the pressure chamber 70 and the powder mixture 60, such that fluid flows through the heat exchanger and can be cooled to cool the pressure chamber 70 and the powder mixture 60. 作为另一个示例,通过选择性地控制(例如,选择性地加热和/或选选择性地冷却)压力腔70内的用于对容器62外表面施加压力以对粉末混合物60加压的流体的温度,粉末混合物60可以在压力腔70内被加热和/或冷却。 As another example, by selectively controlling (e.g., selective heating and / or cooling selected from optionally) for applying an outer surface of the container 62 within the pressure chamber 70 to the pressure of the pressurized fluid mixture 60 of powder temperature, the powder mixture 60 may be heated and / or cooled within the pressure chamber 70.

通过在挤压粉末混合物60时允许粉末混合物60中的任何过量液化添加物从粉末混合物60和容器62流走,可以增加在粉末混合物60 中得到的挤压程度。 By allowing any excess liquefied additives in the powder mixture 60 upon pressing the powder mixture 60 and the container 60 from the powder mixture 62 flow away, it can increase the degree of pressing the powder 60 obtained in the mixture. 换句话说,通过当挤压粉末混合物60时允许粉末混合物60中的任何过量液化添加物从粉末混合物60流走,可以增加图3B中示出的生坯体80的密度。 In other words, by pressing the powder mixture when 60 allows any excess liquefied additives from the powder mixture 60 powder mixture 60 flow away, you can increase the density of the green body shown in FIG. 3B 80.

在用于压紧粉末混合物60以形成图3B中所示生坯体80的一替代方法中,可以使用一个或多个机械致动或液压致动的柱塞在模具或模(未示出)中轴向地对粉末混合物60加压(例如,单轴向加压或多轴向加压)。 60 for pressing the powder mixture to form a green alternative method shown in FIG. 3B body 80, it is possible to use one or more mechanical actuation or hydraulic actuation of the plunger in the mold or die (not shown) axially pressing the powder mixture 60 (e.g., a uniaxial or multiaxial pressure to the pressure).

如前所述,图3B中示出的生坯体80可以包含设置在粉末混合物60 (图3A)中的、由粘接剂保持在一起的多个颗粒(硬质颗粒和基材颗粒)。 As described above, FIG. 3B, the green body 80 shown may be included in the powder mixture 60 is provided (FIG. 3A) of the plurality of particles (hard particles and substrate particles) held together by the adhesive. 可以使用常规机加工技术,例如使用车削技术、碾磨技术以及钻削技术,来在生坯体80中机加工出某些结构特征。 Using conventional machining techniques, for example, turning techniques, milling techniques, and drilling techniques, to process the certain structural features of the machine 80 in the green body. 还可以使用手持工具来在生坯体80上手工形成或加工特征。 It may also be formed using hand tools or machining features in the green body 80 by hand. 作为示例而非限制,可以采用机加工或其它方式在生坯体80上形成刃30、排屑槽32 (图2) 和其它特征,以形成图3C中所示的部分成形的生坯体84。 By way of example and not limitation, blades 30 are formed on the green body 80 may be machined or otherwise employed, 32 (FIG. 2) and other features of the flutes to form the portion shown in FIG. 3C-shaped green body 84 .

图3C中所示的部分成形的生坯体84可以至少部分地烧结以提供图3D中所示的褐色坯体90,褐色坯体90的密度小于所需的最终密度。 Portion shown in FIG. 3C shaped green body 84 may be at least partially sintered to provide a brown body shown in FIG. 3D 90, the final density less than the density of brown body 90 required. 作为示例而非限制,图3C中所示的部分成形的生坯体84可以采用在2005年11月10日提交的待决美国专利申请第11/272,439号中所描述的任何适当烧结方法而至少部分地烧结以提供褐色坯体卯。 By way of example and not limitation, portions shown in FIG. 3C shaped green body 84 in any suitable method to be sintered on November 10, 2005, filed pending US Patent Application No. 11 / 272,439 described may be employed at least partially sintered to provide a brown body d. 褐色坯体90由于其中留有的空隙而基本上能够进行机加工。 Since the brown body 90 to leave voids which can be substantially machined. 可以使用常规机加工技术,例如使用车削技术、碾磨技术以及钻削技术,来在褐色坯体卯上机加工出某些结构特征。 Using conventional machining techniques, for example, turning techniques, milling techniques, and drilling techniques, to certain structural features in the machined blank brown Maoshang machine. 还可以使用手持工具来在褐色坯体卯上手工成形或形成特征。 The hand tool may also be used to manually Maoshang shaped or formed features in the brown body.

作为示例而非限制,可以采用机加工或其它方式在褐色坯体90 上形成内部流体通道(未示出)、切削元件凹部36以及支持部38 (图2),以形成图3E中所示的更充分成形的褐色坯体96。 By way of example and not limitation, machined or otherwise formed in the internal fluid passage (not shown), the cutting element 36 and the supporting recess portions 38 (FIG. 2) in the brown body 90 may be employed to form shown in FIG. 3E more fully shaped brown body 96.

然后3E中所示的褐色坯体96可以被充分烧结至所需最终密度, 以提供先前所描述的图2中所示钻头体50。 Then brown body 96 shown in 3E may be fully sintered to a desired final density to provide the previously described FIG. 2, the bit body 50 shown in FIG. 由于烧结涉及致密化和去除结构中的孔隙,所以被烧结的结构将在烧结过程中收缩。 Since sintering involves densification and removal of the pore structure, the structure being sintered will shrink during the sintering process. 因此,在对未完全烧结的生坯体或褐色坯体进行机加工时,必须考虑和计算尺寸收缩。 Accordingly, when the fully sintered green body or a brown body is machined, dimensional shrinkage must be considered and calculated.

在其它方法中,图3B中所示生坯体80可以被部分烧结以形成未被机加工的褐色坯体,在将褐色坯体完全烧结至所需最终密度之前对褐色坯体执行所有需要的机加工。 In other methods, the green body 80 may be partially sintered to form a brown body is not machined as shown in Figure 3B, the need to perform all of the brown body prior to fully sintering the brown body to a desired final density machining. 在其它方法中,可以对图3B中所示生坯体80执行所有需要的机加工,然后将其充分烧结至所需最终密度。 In other methods, the green body shown in FIG. 80 may be performed all the required machining in FIG. 3B, which is then fully sintered to a desired final density.

由于图3E中所示的褐色坯体96在烧结期间收缩,所以褐色坯体96的各种结构特征的几何偏差(例如尺寸和形状)将潜在地以不合需要的方式变化。 Since the brown body 96 shown in FIG. 3E shrinkage during sintering, so that the geometrical deviations of the various structural features of the brown body 96 (e.g., size and shape) will vary in a manner potentially undesirable. 因此,在烧结和部分烧结过程期间,可以使用耐火结构或可置换构件68来支撑生坯体或褐色坯体的至少一部分,以在烧结过程期间获得或维持所需几何特征(诸如,例如尺寸和形状)。 Therefore, during sintering and partial sintering processes, refractory structures may be used or may be replaced with at least a portion of the support member 68 to a green body or a brown body to obtain or maintain the desired geometric characteristics during the sintering process (such as, for example, the size and shape). 例如, 于2006年12月7日以John H. Stevens和Redd H. Smith的名义申请的、名称为"Displacement Members And Methods Of Using SuchDisplacement Members To Form Bit Bodies Of Earth-Boring Rotary Drill Bits"的美国专利申请(已转让给本申请的受让人,转让文号为1684-8037US )中描述的置换构件的各种实施例中的任一个可以用于支撑生坯体或褐色坯体的至少一部分,以在执行根据本发明的教示的方法时在烧结过程期间获得或维持所需几何特征(诸如,例如尺寸和形状)。 For example, on December 7, 2006 in the name of John H. Stevens and Redd H. Smith of the application, entitled "Displacement Members And Methods Of Using SuchDisplacement Members To Form Bit Bodies Of Earth-Boring Rotary Drill Bits" US Patent application of any of embodiments (assigned to the assignee of the present application, the transfer of the symbol 1684-8037US) displacement members described in various embodiments may be used in at least a portion of the support green body or a brown body to during the sintering process performed to obtain or maintain the desired geometric characteristics (such as, for example, the size and shape) of the method according to the teachings of the present invention.

参见图3F,置换构件68可以设置在于成形的褐色坯体96内形成的一个或多个凹槽或其它特征内,先前参考图3E进行了说明。 Referring to 3F, the displacement member 68 may be disposed within one or more recesses or other features formed in the shaped brown body 96 that, with reference to FIG. 3E previously been described. 例如, 可以在各切削元件凹部36中设置置换构件68。 For example, displacement member 68 may be provided in each recess 36 of the cutting element. 在一些方法中,置换构件68可以使用例如粘接材料固定在切削元件凹部中选定位置处。 In some methods, the displacement member 68 may be fixed by using an adhesive material such as selected locations in the cutting element recess. 尽管没有示出,但是附加的置换构件68可以设置在成形的褐色坯体96 的附加凹槽或特征内,例如,设置在流体通道、喷嘴凹部等处。 Although not shown, additional displacement members 68 may be provided in additional recesses or features of the shaped brown body 96, e.g., disposed in the fluid passage, the nozzle recesses, etc..

如图3G所示,在将置换构件68设置在成形的褐色坯体96的凹槽或其他特征内之后,成形的褐色坯体96可以被烧结至最终密度,以提供充分烧结的钻头体50 (图2)。 As shown, after the displacement member is disposed within the groove 68 or other features of the brown body 96 molded, shaped brown body 96 may be sintered to a final density of 3G, to provide sufficient sintered bit body 50 ( figure 2). 然而,在将成形的褐色坯体96 烧结至最终密度之后,置换构件68可能仍保持固定在充分烧结的钻头体50的各种凹槽或其它特征内(例如,在切削元件凹槽36内)。 However, after the shaped brown body 96 to a final sintered density, displacement members 68 may remain (e.g., within a recess in the cutting element 36) within the various grooves or other features secured sufficiently sintered bit body 50 .

参见图3H,可以将置换构件68从钻头体50的切削元件凹部36 去除,以允许切削元件34 (图2)可以后续地固定在其中。 Referring to Figure 3H, the cutting element may be replaced with member 36 the recess 50 is removed from the bit body 68, to allow the cutting element 34 (FIG. 2) may be subsequently secured therein. 可以使置换构件68破碎或破裂成相对较小的片以利于置换构件68从充分烧结的钻头体50去除。 That the displacement member 68 may be crushed or broken into relatively smaller pieces to facilitate the displacement member 50 is removed from the body 68 of the drill sufficiently sintered.

参见图6,在形成钻头体50之后,切削元件34可以固定在切削元件凹部36内以形成钻地旋转式钻头110。 Referring to Figure 6, after forming the bit body 50, cutting element 34 may be fixed within the recess portion 36 to form the cutting element earth-boring rotary drill bit 110. 钻头体50还可以固定至钻头接头部分112,钻头接头部分112具有螺紋部114用于将旋转式钻头IIO连接至钻杆(未示出)。 The bit body 50 may also be secured to the drill joint portion 112, a drill 112 having a threaded portion fitting portion 114 for connecting the rotary drill bit to the drill rod IIO (not shown). 钻头体50例如还可以通过在钻头体50和钻头接头部分112之间提供硬钎焊合金(braze alloy) 116或其它粘接材料而固定至钻头接头部分112。 The bit body 50 may also be, for example, by a drill bit body 50 and the connector provides brazing alloy (braze alloy) 116 or other adhesive material between portions of the drill bit 112 is secured to the joint portion 112. 此外,沿着钻头体50和钻头接头部分112之间的界面在旋转式钻头110周围可以提供焊接部118。 Also, the bit body along an interface between the drill bit 50 and the joint portion 112 around the rotary drill bit 110 may provide a welded portion 118. 此外, 一个或多个销120或其它机械紧固构件可以用来将钻头体50 固定至钻头接头部分112。 In addition, one or more pins 120 or other mechanical fastening members may be used to the drill bit body 50 is fixed to the joint portion 112. 此种用于将钻头体50固定至钻头接头部分112的方法已在2005年11月10曰申请的待决美国专利申请第11/271,153号中更详细地描述。 Such a method of securing the bit body 50 to the joint portion 112 of the drill bit has been pending US Patent Application No. 11 / 271,153 No. described in more detail in said November 10, 2005 to be filed.

虽然本文已经结合钻地旋转式钻头和此种钻地旋转式钻头的钻头体对根据本发明教示的方法、装置以及系统进行了基本说明,但可以理解的是,本发明并非受此限制。 Although this article has been bound to a rotary drill bit body and the drill bit of such earth-boring rotary drill bit according to the teachings of the present invention, a method, apparatus and system of the basic instructions, it will be appreciated that the present invention is not so limited. 文中所使用的术语"钻头体,,包括钻地旋转式钻头的钻头体、以及包括但不限于钻心、双心钻头、偏心钻头、所谓的"扩眼钻头,,以及钻井和其它向下钻进装置的其它钻地工具的钻头体。 As used herein the term "earth-boring bit body ,, comprising a rotary drill bit body, and including but not limited to terrible, bi-center bits, eccentric bits, so-called" reamers,, as well as drilling and other downhole other earth-boring bit body of the tool device.

尽管已结合一些优选实施例对本发明进行了说明,但本领域技术人员明白本发明不是必须如此受限。 Although certain preferred embodiments of the present invention have been described, those skilled in the art will understand that the present invention is not to be so limited. 与之相反,在不脱离如下文所要求保护的本发明范围的情况下,可以对所述优选实施例进行许多添附、 删除和修改。 In contrast, in the case as described without departing from the scope of the claimed invention, it may be appended to the many of the preferred embodiments, delete, and modify. 此外,来自一个实施例的特征可以于其它实施例的特征相结合,而且也包含在本发明人所预期的本发明范围之内。 In addition, features from one embodiment may be combined with features of other embodiments, but also included in the present invention within the scope of the invention contemplated.

Referenced by
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CN104010751A *8 Nov 201227 Aug 2014六号元素有限公司Method of making cutter elements
CN105089508A *5 May 201425 Nov 2015成都百施特金刚石钻头有限公司Rotational drilling well drill bit and manufacturing method for same
Classifications
International ClassificationE21B10/46, C22C26/00, B22F7/06, C22C29/00
Cooperative ClassificationC22C26/00, C22C29/00, E21B10/54, B22F7/06
European ClassificationB22F7/06, C22C26/00, E21B10/54, C22C29/00
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