CN102943628A - Double-layered casing windowing drillbit - Google Patents
Double-layered casing windowing drillbit Download PDFInfo
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- CN102943628A CN102943628A CN2012104598689A CN201210459868A CN102943628A CN 102943628 A CN102943628 A CN 102943628A CN 2012104598689 A CN2012104598689 A CN 2012104598689A CN 201210459868 A CN201210459868 A CN 201210459868A CN 102943628 A CN102943628 A CN 102943628A
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Abstract
The invention discloses a double-layered casing windowing drillbit. The drillbit comprises a primary drillbit basic body (1) and a secondary drillbit basic body (2), wherein a columnar tooth distribution surface (9), a conical tooth distribution surface (10), a bottom end face (12), a transition folding surface (19) and a tooth socket (20) are formed on the primary drillbit basic body (1), a spiral columnar tooth distribution surface (16) and a spiral tooth socket (17) are formed on the secondary drillbit basic body (2), and hard alloy teeth (3) and a hard alloy block are respectively formed on different positions of the primary drillbit basic body (1) and the secondary drillbit basic body (2). The drillbit has the beneficial effects that the drillbit has the advantages of combining the cutting of both the hard alloy teeth and the hard alloy block, teeth are reasonably distributed in a staggering mode, so that the drillbit can be better suitable for the continuous cutting working condition of double-layered casing windowing process; and the drillbit has the characteristics of high efficiency, long service life and high success ratio, and the technical problems of low double-layered casing windowing success rate and low efficiency are solved.
Description
Technical field
The present invention relates to oil drilling and well workover engineering downhole tool technical field, particularly a kind of double-layer sleeve windowing drill bit.
Background technology
Double-layer sleeve windowing is the window sidetracking technique that exists simultaneously the position of production string and protective casing to carry out at down-hole certain depth place, be mainly used in solving casing damaged well on the oil field old block, distortion well and accident well, making it to recover production capacity, also is one of important measures that the oil field middle and later periods reduce cost incremental oil production (develop residual oil gas reservoir).The core of double-layer sleeve windowing SIDETRACKING TECHNOLOGY is that the supporting with it reliable high efficiency drill bit of windowing will be arranged, and does not also have special-purpose double-layer sleeve windowing drill bit at present, mostly is common individual layer casing sidetracking to be milled cone be applied to the double-layer sleeve windowing operation.Such as Chinese patent 2012100454151, a kind of hard stratum casing windowing drill bit is disclosed, has bit matrix, bit matrix comprises joint, gage surface, taper surface and bottom face, be provided with the cutting abrading block of different structure shape at the different parts of bit matrix, the abrading block that wherein leads is arranged at bottom face, and the boring abrading block is arranged at taper surface, and the gauge abrading block is arranged at gage surface.Because the size of bilayer sleeve is large, casing wall thickness, casing grade intensity are high, cone is opened the increase of double layer of metal sleeve pipe difficulty, poor reliability, the success rate of windowing is low, the cycle of windowing is long so that common list only mills, greatly reduce double-layer sleeve windowing sidetracking efficient, has increased drilling cost.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, a kind of double-layer sleeve windowing drill bit that the efficient of windowing is high, the life-span long, the success rate of windowing is high is provided.
Purpose of the present invention is achieved through the following technical solutions: a kind of double-layer sleeve windowing drill bit, it comprises the one-level bit matrix, the one-level bit matrix is provided with top connection and the one-level cutting portion that connects successively, the one-level cutting portion comprises the cylindricality cloth flank of tooth, the taper cloth flank of tooth and bottom face, it also comprises the secondary bit matrix, the secondary bit matrix is provided with the joint that connects successively, secondary cutting portion and lower contact, top connection and lower contact connect as one, the secondary cutting portion is provided with the spiral cylindricality cloth flank of tooth, spiral alveolar, spiral tank and the transition folding face that is arranged at secondary cutting portion and lower contact junction, also be provided with teeth groove and tank on the one-level cutting portion, the cylindricality cloth flank of tooth, the taper cloth flank of tooth, bottom face, be distributed with boring on the spiral cylindricality cloth flank of tooth and the transition folding face, be provided with hard-metal insert in the boring, be provided with hard alloy blocks A in the teeth groove, be provided with hard alloy blocks B in the spiral alveolar.
Described bottom face is made of folding face and curved surface, is provided with hydrophthalmia in the tank on the bottom face.
Along circumferentially being evenly equipped with four tanks, and four tanks intersect at the center of bottom face on the described one-level cutting portion.
Described transition folding face is made of three folding faces, is symmetrical arranged two spiral tanks on the secondary cutting portion.
Hard-metal insert on the described cylindricality cloth flank of tooth and the taper cloth flank of tooth linearly type is interspersed, hard-metal insert on the spiral cylindricality cloth flank of tooth is screw type and is interspersed, hard-metal insert and hard alloy blocks A are along circumferential alternate layout on the one-level cutting portion, and hard-metal insert and hard alloy blocks B are along circumferential alternate layout on the secondary cutting portion.
Be positioned on the cylindricality cloth flank of tooth, the taper cloth flank of tooth and the bottom face of described carbide alloy between cog and also be provided with hard alloy particle.
Also be provided with the carbide reactor weld groove on the described secondary cutting portion, be provided with hard alloy particle in the carbide reactor weld groove.
Hard-metal insert on described one-level cutting portion and the secondary cutting portion is all along 5 ° of settings of the reverse deflection of bit cutting direction.
Described hard-metal insert, hard alloy blocks A, hard alloy blocks B and hard alloy particle all adopt high-wearing feature, high strength, high hardness material to make.
The present invention has the following advantages:
The present invention is provided with one-level bit matrix and the secondary bit matrix of two different structures, and the different parts that adopts carbide cutting tooth that high-wearing feature, high strength, high hardness material make and hard alloy blocks to be arranged at bit matrix, cutting advantage in conjunction with hard-metal insert and hard alloy blocks, reasonably mix staggered cloth tooth, can adapt to preferably the formed interrupted cut operating mode of asymmetry, instability and form randomness of double-layer sleeve windowing process; Be provided with hard alloy particle on the cutting portion of one-level bit matrix and secondary bit matrix, further improved cutting ability and the anti-wear performance of drill bit, prolonged the application life of drill bit; Because the two-stage drill bit matrix being set, can realize simultaneously milling double layer of metal sleeve pipe, expand window and repair the techniques such as window, the different cutting stages are finished the cutting of corresponding position by the different parts of the cutting portion of one-level bit matrix and secondary bit matrix, disposablely finish the double-layer sleeve windowing operation, have the advantages that efficient is high, the life-span is long and success rate is high, solved low, the inefficient technical barrier of double-layer sleeve windowing success rate.
Description of drawings
Fig. 1 is structural representation of the present invention
Fig. 2 is main TV structure schematic diagram of the present invention
Fig. 3 is the structural representation of looking up of the present invention
Fig. 4 is that Fig. 2 is along the amplification view in A-A cross section
Among the figure, 1-one-level bit matrix, 2-secondary bit matrix, 3-hard-metal insert, 4-hard alloy blocks A, 5-hard alloy particle, 6-hard alloy blocks B, 7-hydrophthalmia, 8-one-level cutting portion, the 9-cylindricality cloth flank of tooth, the 10-taper cloth flank of tooth, 11-top connection, the 12-bottom face, 13-joint, 14-secondary cutting portion, 15-lower contact, the 16-spiral cylindricality cloth flank of tooth, 17-spiral alveolar, 18-spiral tank, 19-transition folding face, the 20-teeth groove, 21-tank, 22-carbide reactor weld groove.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing, and protection scope of the present invention is not limited to the following stated:
Such as Fig. 1, Fig. 2, shown in Figure 4, a kind of double-layer sleeve windowing drill bit, it comprises one-level bit matrix 1, one-level bit matrix 1 is provided with top connection 11 and the one-level cutting portion 8 that connects successively, one-level cutting portion 8 comprises the cylindricality cloth flank of tooth 9, the taper cloth flank of tooth 10 and bottom face 12, also be provided with the teeth groove 20 and the tank 21 that extend vertically on the external surface of one-level cutting portion 8, it also comprises secondary bit matrix 2, secondary bit matrix 2 is provided with the joint 13 that connects successively, secondary cutting portion 14 and lower contact 15, top connection 11 connects as one with lower contact 15, and secondary cutting portion 14 is provided with the spiral cylindricality cloth flank of tooth 16, spiral alveolar 17, spiral tank 18 and the transition folding face 19 that is arranged at secondary cutting portion 14 and lower contact 15 junctions.The double-layer sleeve windowing drill bit is connected with down-hole equipment by joint 13.
Described transition folding face 19 is made of three folding faces that connect successively vertically, be symmetrical arranged two spiral tanks 18 on the secondary cutting portion 14, the cylindricality cloth flank of tooth 9, the taper cloth flank of tooth 10, bottom face 12, be distributed with boring on the spiral cylindricality cloth flank of tooth 16 and the transition folding face 19, be provided with hard-metal insert 3 in the boring, hard-metal insert 3 is that welding-on is in boring, hard-metal insert 3 on one-level cutting portion 8 and the secondary cutting portion 14 is all along 5 ° of settings of the reverse deflection of bit cutting direction, be provided with hard alloy blocks A4 in the teeth groove 20, be provided with hard alloy blocks B6 in the spiral alveolar 17, hard-metal insert 3 on the cylindricality cloth flank of tooth 9 and the taper cloth flank of tooth 10 linearly type is interspersed, hard-metal insert 3 on the spiral cylindricality cloth flank of tooth 16 is screw type and is interspersed, hard-metal insert 3 and hard alloy blocks A4 are along circumferential alternate layout on the one-level cutting portion 8, and hard-metal insert 3 and hard alloy blocks B6 are along circumferential alternate layout on the secondary cutting portion 14.Be positioned on the cylindricality cloth flank of tooth 9, the taper cloth flank of tooth 10 and the bottom face 12 of 3 of described hard-metal inserts and also be provided with in right amount hard alloy particle 5, also be provided with carbide reactor weld groove 22 on the secondary cutting portion 14, be provided with hard alloy particle 5 in the carbide reactor weld groove 22, hard alloy particle 5 built-up welding are in the above-mentioned cylindricality cloth flank of tooth 9, the taper cloth flank of tooth 10, bottom face 12 and carbide reactor weld groove 22, and hard-metal insert 3, hard alloy blocks A4, hard alloy blocks B6 and hard alloy particle 5 all adopt high-wearing feature, high strength, high hardness material to make.
As shown in Figure 3, described bottom face 12 is made of the folding face and the curved surface that connect successively, the another side of this folding face is connected with the taper cloth flank of tooth 10, be provided with hydrophthalmia 7 in the tank 21 on the bottom face 12, bottom face 12 is provided with two hydrophthalmias 7 in the present embodiment, along circumferentially being evenly equipped with four tanks 21, and four tanks 21 intersect at the center of bottom face 12 on the one-level cutting portion 8.
The course of work of the present invention is as follows: transfer drilling tool in the bilayer sleeve that is furnished with whipstock, under the guiding of whipstock, at first the junction by the taper cloth flank of tooth 10 and the cylindricality cloth flank of tooth 9 touches the production string inwall, and it is carried out milling, along with drill bit creeps into downwards along whipstock, simultaneously the production string wall is carried out milling by the cylindricality cloth flank of tooth 9 and the taper cloth flank of tooth 10, and milling is to the production string wall, at this moment, bottom face 12 also touches the production string wall, and the production string wall that bottom face 12 touches is carried out milling; Along with drill bit creeps into, form upper window behind the cylindricality cloth flank of tooth 9 and the taper cloth flank of tooth 10 worn out production string walls, bottom face 12 rides over and continues downward milling production string on the production string wall, at this moment, the junction of the taper cloth flank of tooth 10 and the cylindricality cloth flank of tooth 9 touches the protective casing inwall and it is carried out milling, simultaneously, secondary cutting portion 14 touches window, and begins window is expanded and repairs; Along with drill bit continues to creep into, the cylindricality cloth flank of tooth 9 and the taper cloth flank of tooth 10 are worn out with the protective casing wall, and bottom face 12 breaks away from the production string wall and rides over the downward milling protective casing of continuation on the protective casing wall; Under the guiding of whipstock, form lower window break away from the outer wall of protective casings when the cylindricality cloth flank of tooth 9 after, simultaneously, secondary cutting portion 14 continues to finish to the expansion window of whole window and repaiies the window operation, finishes whole windowing work.Hydrophthalmia 7, be arranged at the tank 21 on the one-level bit matrix 1 and be arranged at spiral tank 18 on the secondary bit matrix 2 as the runner of mud, play cooling drill bit and chip removal effect.
Claims (9)
1. double-layer sleeve windowing drill bit, it comprises one-level bit matrix (1), one-level bit matrix (1) is provided with top connection (11) and the one-level cutting portion (8) that connects successively, one-level cutting portion (8) comprises the cylindricality cloth flank of tooth (9), the taper cloth flank of tooth (10) and bottom face (12), it is characterized in that: it also comprises secondary bit matrix (2), secondary bit matrix (2) is provided with the joint (13) that connects successively, secondary cutting portion (14) and lower contact (15), top connection (11) connects as one with lower contact (15), secondary cutting portion (14) is provided with the spiral cylindricality cloth flank of tooth (16), spiral alveolar (17), spiral tank (18) and be arranged at the transition folding face (19) of secondary cutting portion (14) and lower contact (15) junction, also be provided with teeth groove (20) and tank (21) on the one-level cutting portion (8), the cylindricality cloth flank of tooth (9), the taper cloth flank of tooth (10), bottom face (12), be distributed with boring on the spiral cylindricality cloth flank of tooth (16) and the transition folding face (19), be provided with hard-metal insert (3) in the boring, teeth groove is provided with hard alloy blocks A(4 in (20)), spiral alveolar is provided with hard alloy blocks B(6 in (17)).
2. a kind of double-layer sleeve windowing drill bit according to claim 1, it is characterized in that: described bottom face (12) is made of folding face and curved surface, is provided with hydrophthalmia (7) in the tank (21) on the bottom face (12).
3. a kind of double-layer sleeve windowing drill bit according to claim 1 and 2 is characterized in that: described one-level cutting portion (8) is upper along circumferentially being evenly equipped with four tanks (21), and four tanks (21) intersect at the center of bottom face (12).
4. a kind of double-layer sleeve windowing drill bit according to claim 1 is characterized in that: described transition folding face (19) is made of three folding faces, is symmetrical arranged two spiral tanks (18) on the secondary cutting portion (14).
5. a kind of double-layer sleeve windowing drill bit according to claim 1, it is characterized in that: the hard-metal insert (3) on the described cylindricality cloth flank of tooth (9) and the taper cloth flank of tooth (10) linearly type is interspersed, hard-metal insert (3) on the spiral cylindricality cloth flank of tooth (16) is screw type and is interspersed, the upper hard-metal insert (3) of one-level cutting portion (8) and hard alloy blocks A(4) along circumferential alternate layout, the upper hard-metal insert (3) of secondary cutting portion (14) and hard alloy blocks B(6) along circumferential alternate layout.
6. a kind of double-layer sleeve windowing drill bit according to claim 1 is characterized in that: be positioned on the cylindricality cloth flank of tooth (9), the taper cloth flank of tooth (10) and the bottom face (12) between described hard-metal insert (3) and also be provided with hard alloy particle (5).
7. a kind of double-layer sleeve windowing drill bit according to claim 1 is characterized in that: also be provided with carbide reactor weld groove (22) on the described secondary cutting portion (14), be provided with hard alloy particle (5) in the carbide reactor weld groove (22).
8. a kind of double-layer sleeve windowing drill bit according to claim 1, it is characterized in that: the hard-metal insert (3) on described one-level cutting portion (8) and the secondary cutting portion (14) is all along 5 ° of settings of the reverse deflection of bit cutting direction.
9. it is characterized in that: described hard-metal insert (3), hard alloy blocks A(4 according to claim 6 or 7 described a kind of double-layer sleeve windowing drill bits), hard alloy blocks B(6) and hard alloy particle (5) all adopt high-wearing feature, high strength, high hardness material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210459868.9A CN102943628B (en) | 2012-11-15 | 2012-11-15 | Double-layered casing windowing drillbit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210459868.9A CN102943628B (en) | 2012-11-15 | 2012-11-15 | Double-layered casing windowing drillbit |
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| Publication Number | Publication Date |
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| CN102943628A true CN102943628A (en) | 2013-02-27 |
| CN102943628B CN102943628B (en) | 2015-04-15 |
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| CN201210459868.9A Active CN102943628B (en) | 2012-11-15 | 2012-11-15 | Double-layered casing windowing drillbit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178872A (en) * | 2015-09-09 | 2015-12-23 | 长江大学 | Mechanical auxiliary device used for improving bit pressure |
| CN108104753A (en) * | 2017-12-18 | 2018-06-01 | 海林新科石油耐磨工具有限责任公司 | Integrated high-efficiency sidetrack drilling tool |
| CN111749636A (en) * | 2020-07-09 | 2020-10-09 | 合力（天津）能源科技股份有限公司 | Multi-layer casing windowing mill shoe |
| CN113202438A (en) * | 2021-05-24 | 2021-08-03 | 北京探矿工程研究所 | Combined cutting windowing milling cone |
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| US20010035302A1 (en) * | 1998-03-13 | 2001-11-01 | Desai Praful C | Method for milling casing and drilling formation |
| CN201495991U (en) * | 2009-06-02 | 2010-06-02 | 武汉亿斯达工具有限公司 | Gauge protection pad surfacing structure of steel diamond bit |
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| CN102162343A (en) * | 2011-04-14 | 2011-08-24 | 中国海洋石油总公司 | Milling shoes for casing window sidetracking |
| CN202215176U (en) * | 2011-08-31 | 2012-05-09 | 东营博深石油机械有限责任公司 | Novel dismountable and replaceable compound windowing milling wimble |
| CN202401998U (en) * | 2011-12-02 | 2012-08-29 | 辽宁跨克石油装备有限公司 | High-efficiency drilling and reaming milling cone |
| CN202900051U (en) * | 2012-11-15 | 2013-04-24 | 西南石油大学 | Double-layer casing window-opening drill bit |
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2012
- 2012-11-15 CN CN201210459868.9A patent/CN102943628B/en active Active
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| US5657820A (en) * | 1995-12-14 | 1997-08-19 | Smith International, Inc. | Two trip window cutting system |
| US5769166A (en) * | 1996-01-24 | 1998-06-23 | Weatherford/Lamb, Inc. | Wellbore window milling method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178872A (en) * | 2015-09-09 | 2015-12-23 | 长江大学 | Mechanical auxiliary device used for improving bit pressure |
| CN108104753A (en) * | 2017-12-18 | 2018-06-01 | 海林新科石油耐磨工具有限责任公司 | Integrated high-efficiency sidetrack drilling tool |
| CN111749636A (en) * | 2020-07-09 | 2020-10-09 | 合力（天津）能源科技股份有限公司 | Multi-layer casing windowing mill shoe |
| CN113202438A (en) * | 2021-05-24 | 2021-08-03 | 北京探矿工程研究所 | Combined cutting windowing milling cone |
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| Publication number | Publication date |
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| CN102943628B (en) | 2015-04-15 |
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