WO2004040095A1 - Tool insert - Google Patents

Tool insert Download PDF

Info

Publication number
WO2004040095A1
WO2004040095A1 PCT/IB2003/003892 IB0303892W WO2004040095A1 WO 2004040095 A1 WO2004040095 A1 WO 2004040095A1 IB 0303892 W IB0303892 W IB 0303892W WO 2004040095 A1 WO2004040095 A1 WO 2004040095A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool insert
protective layer
cutting edge
substrate
ultra
Prior art date
Application number
PCT/IB2003/003892
Other languages
French (fr)
Inventor
Klaus Tank
Raymond Albert Chapman
Roy Derrick Achilles
Original Assignee
Element Six (Proprietary) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Element Six (Proprietary) Limited filed Critical Element Six (Proprietary) Limited
Priority to AU2003259458A priority Critical patent/AU2003259458A1/en
Priority to US10/533,046 priority patent/US20060144621A1/en
Priority to EP03809804A priority patent/EP1565642B1/en
Priority to CA2504518A priority patent/CA2504518C/en
Priority to AT03809804T priority patent/ATE493559T1/en
Priority to DE60335568T priority patent/DE60335568D1/en
Publication of WO2004040095A1 publication Critical patent/WO2004040095A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5676—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a cutting face with different segments, e.g. mosaic-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations

Definitions

  • THIS invention relates to tool inserts and more particularly tool inserts which can be used as cutting elements in rotary drilling bits intended for subterranean rock drilling.
  • diamond compacts also known as PCD
  • PCD diamond compacts
  • cutters in drilling operations is well known due to the high abrasion resistant properties of diamond cutters. It is also well established that diamond cutters cannot be used satisfactorily for milling or drilling through ferrous substrates such as steel. Therein lies a problem in the use of diamond cutters in certain down the hole drilling operations, particularly with regard to subterranean directional drilling, such as drilling horizontally into a rockbed from an underground location in a vertical borehole or shaft.
  • a steel casing is typically positioned down the vertical borehole or shaft, creating a lining therefor in the region requiring horizontal drilling.
  • a deflector which is positioned adjacent the position where horizontal drilling is to be carried out. The function of the deflector, which is generally wedge-shaped, is to cause the drill to change direction and begin milling through the steel casing to create a window to the bedrock.
  • tungsten carbide cutters are typically used in the drill bit to mill through the steel casing. Once through the casing, the tungsten carbide inserts have to be replaced with abrasive resistant cutters such as diamond cutters in order to drill into the bedrock. This means that the drill bit has to be removed and replaced with an appropriate bit. As the drill strings that have to be removed are very long, this is a time consuming exercise. that results in costly downtime.
  • a tool insert comprises:
  • the layer of ultra-hard abrasive material having a side surface and a top surface, a portion of the periphery of the top surface of the ultra- hard abrasive material providing a primary cutting edge for the tool insert;
  • a protective layer a surface of the protective layer being bonded to the top surface and/or the side surface of the ultra-hard abrasive material so as to protect the primary cutting edge thereof, a periphery of the protective layer providing a secondary cutting edge for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling a window through a first substance, such as a casing or lining of a borehole or shaft, but to expose the primary cutting edge upon encountering a second substance, such as a rockbed.
  • a first substance such as a casing or lining of a borehole or shaft
  • a method of drilling a horizontal or angled hole in a subterranean rock formation includes the steps of: 1) preparing the. site for horizontal or angled drilling by a) using an existing borehole or, if not available, drilling a borehole into a subterranean rock formation to an appropriate depth and b) lining the borehole, at least in the region where horizontal or angled drilling is to take place, with a casing or lining having a passage and a deflector means mounted in the passage;
  • each cutting tool insert comprising a substrate, a layer of ultra-hard abrasive material bonded to the substrate, the ultra-hard abrasive material providing a primary cutting edge for the tool insert, and a protective layer for protecting the primary cutting edge and for providing a secondary cutting edge;
  • the depth of the protective layer is such as to protect the primary cutting edge whilst milling through the casing or lining and to expose the primary cutting edge upon encountering the subterranean rock formation.
  • the above method can also be used for the drilling of multiple directional holes from a central vertical borehole.
  • Figure 1 is a schematic sectional side view of a rotary drill bit in a subterranean rock drilling operation
  • Figure 2 is a sectional side view of a first embodiment of a tool insert of the invention
  • Figure 3 is a plan view of the tool insert of figure 2;
  • Figure 4 is a sectional side view of a second embodiment of a tool insert of the invention.
  • Figure 5 is a sectional side view of a third embodiment of a tool insert of the invention.
  • Figure 6 is a plan view of the tool insert of Figure 5;
  • Figure 7 is a sectional side view of a fourth embodiment of a tool insert of the invention.
  • Figure 8 is a plan view of the tool insert of Figure 7;
  • Figure 9 is a sectional side view of a fifth embodiment of a tool insert of the invention.
  • Figure 10 is a plan view of the tool insert of Figure 9. DESCRIPTION OF EMBODIMENTS
  • a drill assembly 10 consists of a rotary drill string 12 and a rotary drill bit 14, of the drag bit kind in this case.
  • the drill bit 14 is directed down a passage 16 within a steel tubular casing 18.
  • the steel casing 18 is anchored in a borehole or shaft 20 drilled into a subterranean bedrock or rock formation 22.
  • a deflector 26 which is attached to the casing 18 and which has previously been positioned adjacent the region 'X', causes the bit 14 to change direction in this manner.
  • the deflector 26 is supported by an anchor 28.
  • the layer of ultra-hard abrasive material will generally be a layer of PCD, although under appropriate conditions PCBN may also be used.
  • the layer may also be a layer of diamond produced by chemical vapour deposition, called CVD diamond.
  • the substrate of the tool insert will generally be a cemented carbide substrate. Such substrates are well known in the art and are generally cemented tungsten carbide substrates.
  • the protective layer which may be an extension of the substrate or a separate layer, will also generally be of cemented tungsten carbide, although it may be of a different grade to that of the substrate. In certain instances, the' protective layer may be formed of tool steel or other appropriate material suited to milling through steel or other material used for the casing or lining.
  • a cemented carbide substrate 40 has a planar base surface 42 and an upper surface 44.
  • a centrally located recess 46 is formed in the upper surface 44.
  • the recess 46 is surrounded by an annular region 48 and has a surface 50. Although the recess 46 is centrally located in this embodiment, it could also be positioned off centre.
  • the recess 46 is filled with diamond particles. Thereafter, the diamond- filled substrate 40 is placed in a reaction capsule and the reaction capsule placed in the reaction zone of a conventional high pressure/high temperature apparatus. The capsule is exposed to conditions of high pressure and temperature suitable to produce a diamond abrasive compact (PCD) 52. Under these conditions the PCD 52 will form and bond to the cemented carbide substrate over the entire surface which defines the recess 46. A cutting edge 54, the primary cutting edge of the tool insert, is defined by the periphery of the PCD 52.
  • PCD diamond abrasive compact
  • the cemented carbide / PCD body is then removed from the reaction capsule using known techniques. As such the cemented carbide / PCD body forms a precursor of a tool insert of the invention.
  • the annular region 48 of the substrate 40 is ground or otherwise removed so as to leave a predetermined depth, indicated by the numeral 56, of tungsten carbide material.
  • This depth of material 56 is selected so as to correspond to the amount of tungsten carbide material required to mill through the wall of a steel casing or lining of a borehole, as described above.
  • the depth of tungsten carbide 56 provides a protective layer for the primary cutting edge 54 of the PCD 52, and also a secondary cutting edge 58 for milling through the steel casing. Once a window has been milled through the steel casing, ideally the layer 56 should be almost expended so as to expose the cutting edge 54 for drilling into the rockbed.
  • the tungsten carbide substrate 40 whilst having the desired properties for forming the PCD layer 52, may not have the desired properties for milling through a steel casing or lining.
  • the annular protective layer 48 may be replaced by tungsten carbide of a different grade or by another suitable material, such as tool steel, for example.
  • the annular region 48 in such a case could be formed as a ring in situ or, alternatively, could be formed as a separate ring component which , is attached to the tool insert.
  • the ring 48 may be attached to the tool insert, which has been machined to accept the ring, by for example brazing, press fitting, shrink fitting or any other convenient method.
  • a second embodiment of a tool insert of the invention comprises a tungsten carbide substrate 60, a PCD layer 62 having a cutting edge 64, and a tungsten carbide protective overiayer 66 having a cutting edge 68.
  • the depth 70 of the protective overiayer 66 is selected so as to mill a window through the steel casing or lining of a borehole in a subterranean bedrock whilst exposing the PCD cutting edge 64 once through the steel casing.
  • a third embodiment of a tool insert of the invention is illustrated in figures 5 and 6 of the accompanying drawings.
  • the tool insert consists of a cemented carbide substrate 80, a PCD layer 82, having a cutting edge 84, and a tungsten carbide protective segment 86, having a cutting edge 88, bonded to the substrate 80.
  • the tungsten carbide segment 86 could be an extension of the substrate 80.
  • the tungsten carbide segment 86 could be formed of a tungsten carbide material of a different grade that is adapted to the particular substrate to be milled.
  • the depth of the tungsten carbide segment 86 is once again selected so as to protect the cutting edge 84 whilst drilling through a steel casing, but to expose the cutting edge 84 soon after encountering the subterranean bedrock.
  • a tungsten carbide substrate 90 includes a number of parallel recesses 92 in which parallel PCD segments or strips 94 are formed.
  • the PCD segments 94 are protected by respective tungsten carbide segments or strips 96.
  • the cutting edges 98 of respective PCD segments 94 are protected by the tungsten carbide segments 96, which .in turn have cutting edges 100.
  • This arrangement allows the tool insert to be used for cutting through successive layers of steel and subterranean bedrock and can therefore be used multiple times.
  • a fifth embodiment of a tool insert of the invention comprises a substrate 110 on which is formed a PCD layer 112.
  • the substrate 110 and PCD layer 112 would be formed in a conventional high pressure/high temperature apparatus, whereafter the relevant portion of the substrate would be ground away to expose the primary cutting edge 1 14 of the PCD layer 112.
  • the substrate 10 and PCD layer 112 are brazed into a cup 116 which is typically formed of a high speed tool steel, which cup 116 includes a cutting edge 118 for milling through the steel casing or lining of a borehole in a subterranean rockbed.

Abstract

A tool insert comprises a substrate (40), a layer of ultra-hard abrasive material (52) bonded to the substrate and presenting a primary cutting edge (54) for the tool insert, and a protective layer (56) bonded to the ultra-hard abrasive material so as to protect the primary cutting edge thereof. The protective layer provides a secondary cutting edge (58) for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling a window through a first substance, such as a casing or lining of a borehole or shaft, but to expose the primary cutting edge upon encountering a second substance, such as a rockbed. The invention extends to a method of drilling a horizontal or angled hole in a subterranean rock formation using a rotary drill string and bit incorporating a tool insert of the invention.

Description

TOOL INSERT
BACKGROUND OF THE INVENTION
THIS invention relates to tool inserts and more particularly tool inserts which can be used as cutting elements in rotary drilling bits intended for subterranean rock drilling.
The use of diamond compacts, also known as PCD, as cutters in drilling operations is well known due to the high abrasion resistant properties of diamond cutters. It is also well established that diamond cutters cannot be used satisfactorily for milling or drilling through ferrous substrates such as steel. Therein lies a problem in the use of diamond cutters in certain down the hole drilling operations, particularly with regard to subterranean directional drilling, such as drilling horizontally into a rockbed from an underground location in a vertical borehole or shaft.
In order to drill horizontally into a rockbed from an underground location, it is necessary to change the direction of movement of the drill bit from a vertical direction to a horizontal direction. To do so, a steel casing is typically positioned down the vertical borehole or shaft, creating a lining therefor in the region requiring horizontal drilling. Located within the steel casing is a deflector which is positioned adjacent the position where horizontal drilling is to be carried out. The function of the deflector, which is generally wedge-shaped, is to cause the drill to change direction and begin milling through the steel casing to create a window to the bedrock.
As PCD is not suitable for drilling through the steel casing due to reactions with the ferrous materials, an alternative drill bit insert is required. Accordingly, tungsten carbide cutters are typically used in the drill bit to mill through the steel casing. Once through the casing, the tungsten carbide inserts have to be replaced with abrasive resistant cutters such as diamond cutters in order to drill into the bedrock. This means that the drill bit has to be removed and replaced with an appropriate bit. As the drill strings that have to be removed are very long, this is a time consuming exercise. that results in costly downtime.
SUMMARY OF THE INVENTION
According to one aspect of the invention, a tool insert comprises:
a substrate;
a layer of ultra-hard abrasive material bonded to the substrate, the layer of ultra-hard abrasive material having a side surface and a top surface, a portion of the periphery of the top surface of the ultra- hard abrasive material providing a primary cutting edge for the tool insert; and
a protective layer, a surface of the protective layer being bonded to the top surface and/or the side surface of the ultra-hard abrasive material so as to protect the primary cutting edge thereof, a periphery of the protective layer providing a secondary cutting edge for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling a window through a first substance, such as a casing or lining of a borehole or shaft, but to expose the primary cutting edge upon encountering a second substance, such as a rockbed.
According to a further aspect of the invention, a method of drilling a horizontal or angled hole in a subterranean rock formation includes the steps of: 1) preparing the. site for horizontal or angled drilling by a) using an existing borehole or, if not available, drilling a borehole into a subterranean rock formation to an appropriate depth and b) lining the borehole, at least in the region where horizontal or angled drilling is to take place, with a casing or lining having a passage and a deflector means mounted in the passage;
2) providing a drill bit with at least one cutting tool insert, the or each cutting tool insert comprising a substrate, a layer of ultra-hard abrasive material bonded to the substrate, the ultra-hard abrasive material providing a primary cutting edge for the tool insert, and a protective layer for protecting the primary cutting edge and for providing a secondary cutting edge;
3) guiding the drill bit down the borehole until it contacts the deflector and is deflected towards the casing or lining;
4) milling a window through the casing or lining to the subterranean rock formation; and
5) drilling a hole in the subterranean rock formation,
wherein the depth of the protective layer is such as to protect the primary cutting edge whilst milling through the casing or lining and to expose the primary cutting edge upon encountering the subterranean rock formation.
The above method can also be used for the drilling of multiple directional holes from a central vertical borehole. BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a schematic sectional side view of a rotary drill bit in a subterranean rock drilling operation;
Figure 2 is a sectional side view of a first embodiment of a tool insert of the invention;
Figure 3 is a plan view of the tool insert of figure 2;
Figure 4 is a sectional side view of a second embodiment of a tool insert of the invention;
Figure 5 is a sectional side view of a third embodiment of a tool insert of the invention;
Figure 6 is a plan view of the tool insert of Figure 5;
Figure 7 is a sectional side view of a fourth embodiment of a tool insert of the invention;
Figure 8 is a plan view of the tool insert of Figure 7;
Figure 9 is a sectional side view of a fifth embodiment of a tool insert of the invention; and
Figure 10 is a plan view of the tool insert of Figure 9. DESCRIPTION OF EMBODIMENTS
Referring to figure 1 a drill assembly 10 consists of a rotary drill string 12 and a rotary drill bit 14, of the drag bit kind in this case.
The drill bit 14 is directed down a passage 16 within a steel tubular casing 18. The steel casing 18 is anchored in a borehole or shaft 20 drilled into a subterranean bedrock or rock formation 22.
In order for the rotary drill bit 14 to drill a horizontal or angled hole in the bedrock 22 in the region indicated by an 'X', it is necessary for the drill bit 14 to be redirected from a vertical direction of movement to a horizontal or angled direction of movement, along the arrow 24. A deflector 26, which is attached to the casing 18 and which has previously been positioned adjacent the region 'X', causes the bit 14 to change direction in this manner. The deflector 26 is supported by an anchor 28.
As mentioned previously, in order to drill through the casing 18, typically cemented tungsten carbide cutters have traditionally been used. Once a window 30 has been milled through the casing 18, the drill bit 14 is withdrawn and replaced with a drill bit having abrasion resistant cutters such as PCD cutters. This time consuming operation is obviated by using tool inserts or cutters of the invention.
The layer of ultra-hard abrasive material will generally be a layer of PCD, although under appropriate conditions PCBN may also be used. The layer may also be a layer of diamond produced by chemical vapour deposition, called CVD diamond.
The substrate of the tool insert will generally be a cemented carbide substrate. Such substrates are well known in the art and are generally cemented tungsten carbide substrates. The protective layer, which may be an extension of the substrate or a separate layer, will also generally be of cemented tungsten carbide, although it may be of a different grade to that of the substrate. In certain instances, the' protective layer may be formed of tool steel or other appropriate material suited to milling through steel or other material used for the casing or lining.
Referring to figures 2 and 3, a first embodiment of a tool insert of the invention is illustrated. A cemented carbide substrate 40 has a planar base surface 42 and an upper surface 44. A centrally located recess 46 is formed in the upper surface 44. The recess 46 is surrounded by an annular region 48 and has a surface 50. Although the recess 46 is centrally located in this embodiment, it could also be positioned off centre.
The recess 46 is filled with diamond particles. Thereafter, the diamond- filled substrate 40 is placed in a reaction capsule and the reaction capsule placed in the reaction zone of a conventional high pressure/high temperature apparatus. The capsule is exposed to conditions of high pressure and temperature suitable to produce a diamond abrasive compact (PCD) 52. Under these conditions the PCD 52 will form and bond to the cemented carbide substrate over the entire surface which defines the recess 46. A cutting edge 54, the primary cutting edge of the tool insert, is defined by the periphery of the PCD 52.
The cemented carbide / PCD body is then removed from the reaction capsule using known techniques. As such the cemented carbide / PCD body forms a precursor of a tool insert of the invention.
To produce a tool insert of the invention, the annular region 48 of the substrate 40 is ground or otherwise removed so as to leave a predetermined depth, indicated by the numeral 56, of tungsten carbide material. This depth of material 56 is selected so as to correspond to the amount of tungsten carbide material required to mill through the wall of a steel casing or lining of a borehole, as described above. To this end, the depth of tungsten carbide 56 provides a protective layer for the primary cutting edge 54 of the PCD 52, and also a secondary cutting edge 58 for milling through the steel casing. Once a window has been milled through the steel casing, ideally the layer 56 should be almost expended so as to expose the cutting edge 54 for drilling into the rockbed.
In some applications, the tungsten carbide substrate 40, whilst having the desired properties for forming the PCD layer 52, may not have the desired properties for milling through a steel casing or lining. In view thereof, the annular protective layer 48 may be replaced by tungsten carbide of a different grade or by another suitable material, such as tool steel, for example. The annular region 48 in such a case could be formed as a ring in situ or, alternatively, could be formed as a separate ring component which, is attached to the tool insert. The ring 48 may be attached to the tool insert, which has been machined to accept the ring, by for example brazing, press fitting, shrink fitting or any other convenient method.
As the function of the protective layer is to protect the cutting edge of the PCD and provide a cutting edge for drilling through a steel substrate, it need not be an extension of the substrate of the tool insert as described above. As shown in figure 4, a second embodiment of a tool insert of the invention comprises a tungsten carbide substrate 60, a PCD layer 62 having a cutting edge 64, and a tungsten carbide protective overiayer 66 having a cutting edge 68. As before, the depth 70 of the protective overiayer 66 is selected so as to mill a window through the steel casing or lining of a borehole in a subterranean bedrock whilst exposing the PCD cutting edge 64 once through the steel casing.
A third embodiment of a tool insert of the invention is illustrated in figures 5 and 6 of the accompanying drawings. The tool insert consists of a cemented carbide substrate 80, a PCD layer 82, having a cutting edge 84, and a tungsten carbide protective segment 86, having a cutting edge 88, bonded to the substrate 80. The tungsten carbide segment 86 could be an extension of the substrate 80. Alternatively, if the grade of the tungsten carbide substrate 80 is not appropriate for the cutting of a particular grade of steel, the tungsten carbide segment 86 could be formed of a tungsten carbide material of a different grade that is adapted to the particular substrate to be milled. The depth of the tungsten carbide segment 86 is once again selected so as to protect the cutting edge 84 whilst drilling through a steel casing, but to expose the cutting edge 84 soon after encountering the subterranean bedrock.
Referring to figures 7 and 8, which illustrate a fourth embodiment of a tool insert of the invention, a tungsten carbide substrate 90 includes a number of parallel recesses 92 in which parallel PCD segments or strips 94 are formed. The PCD segments 94 are protected by respective tungsten carbide segments or strips 96. In this arrangement, the cutting edges 98 of respective PCD segments 94 are protected by the tungsten carbide segments 96, which .in turn have cutting edges 100. This arrangement allows the tool insert to be used for cutting through successive layers of steel and subterranean bedrock and can therefore be used multiple times.
Referring to figures 9 and 10, a fifth embodiment of a tool insert of the invention comprises a substrate 110 on which is formed a PCD layer 112. Typically, the substrate 110 and PCD layer 112 would be formed in a conventional high pressure/high temperature apparatus, whereafter the relevant portion of the substrate would be ground away to expose the primary cutting edge 1 14 of the PCD layer 112. In order to protect the cutting edge 114 in a subterranean rock drilling process of the invention, the substrate 10 and PCD layer 112 are brazed into a cup 116 which is typically formed of a high speed tool steel, which cup 116 includes a cutting edge 118 for milling through the steel casing or lining of a borehole in a subterranean rockbed.
As should be evident from the above, a number of different configurations of the tool insert of the invention are possible in order to achieve the desired purpose of protecting the primary cutting edge of a PCD or PCBN layer whilst milling a window through the steel casing or lining of a borehole in a subterranean bedrock, and exposing the PCD or PCBN cutting edge once through the steel casing.

Claims

1. A tool insert comprising:
a substrate;
a layer of ultra-hard abrasive material bonded to the substrate, the layer of ultra-hard abrasive material having a side surface and a top surface, a portion of the periphery of the top surface of the ultra- hard abrasive material providing a primary cutting edge for the tool insert; and
a protective layer, a surface of the protective layer being, bonded to the top surface and/or the side surface of the ultra-hard abrasive material so as to protect the primary cutting edge thereof, a' periphery of the protective layer providing a secondary cutting edge for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling a window through a first substance but to expose the primary cutting edge upon encountering a second substance.
2. A tool insert according to claim 1 , wherein the. substrate is a tungsten carbide substrate.
3. A tool insert according to claim 1 or claim 2, wherein the protective layer is integrally formed with the substrate and is formed of the same material as the substrate.
4. A tool insert according to claim 1 or claim 2, wherein the protective layer is formed as a separate component in situ.
5. A tool insert according to claim 1 or claim 2, wherein the protective layer is formed as a separate component which is bonded to the top surface and/or the side surface of the ultra-hard abrasive material.
6. A tool insert according to any one of the preceding claims, wherein the protective layer is provided in the form of a ring which is located about the periphery of the layer of ultra-hard abrasive material.
7. A tool insert according to any one of claims 1 to 5, wherein the protective layer is an overiayer bonded to the top surface of the ultra-hard abrasive material.
8. A tool insert according to any one of claims 1 to 5, wherein the protective layer forms a segment which is bonded to the substrate adjacent the layer of ultra-hard abrasive material.
9. A tool insert according to any one of claims 1 to 5, wherein a plurality of alternating ultra-hard abrasive material strips and protective layer strips are located on the substrate, the successive strips of ultra-hard abrasive material providing a series of primary cutting edges and the successive protective layer strips providing a series of secondary cutting edges.
10. A tool insert according to any one of the preceding claims, wherein the protective layer is formed of the same type of material as the substrate but of a different grade to that of the substrate, or of tool steel or of another suitable material dependent on the first substance.
11. A tool insert according to any one of the preceding claims, wherein the first substance is a casing or lining of a borehole or shaft in a bedrock and the second substance is the bedrock.
12. A method of drilling a horizontal or angled hole in a subterranean rock formation includes the steps of: 1 ) preparing the site for horizontal or angled drilling by a) using an existing borehole or, if not available, drilling a borehole into a subterranean rock formation to an appropriate depth and b) lining the borehole, at least in the region where horizontal or angled drilling is to take place, with a casing or lining having a passage and a deflector means mounted in the passage;
2) providing a drill bit with at least one cutting tool insert, the or each cutting tool insert comprising a substrate, a layer of ultra-hard abrasive material bonded to the substrate, the ultra-hard abrasive material providing a primary cutting edge for the tool insert, and a protective layer for protecting the. primary cutting edge and for providing a secondary cutting edge;
3) guiding the drill bit down the borehole until it contacts the deflector and is deflected towards the casing or lining;
4) milling a window through the casing or lining to the subterranean rock formation; and
5) drilling a hole in the subterranean rock formation,
wherein the depth of the protective layer is such as to protect the primary cutting edge whilst milling through the casing or lining and to expose the primary cutting edge upon encountering the subterranean rock formation.
13. A method according to claim 12, which is used for the drilling of multiple directional holes from a central vertical borehole.
4. A method according to claim 12 or claim 13, wherein the cutting tool insert is as defined in any one of claims 1 to 11.
PCT/IB2003/003892 2002-10-30 2003-09-12 Tool insert WO2004040095A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2003259458A AU2003259458A1 (en) 2002-10-30 2003-09-12 Tool insert
US10/533,046 US20060144621A1 (en) 2002-10-30 2003-09-12 Tool insert
EP03809804A EP1565642B1 (en) 2002-10-30 2003-09-12 Tool insert
CA2504518A CA2504518C (en) 2002-10-30 2003-09-12 Tool insert
AT03809804T ATE493559T1 (en) 2002-10-30 2003-09-12 TOOL USE
DE60335568T DE60335568D1 (en) 2002-10-30 2003-09-12 TOOL USE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2002/8777 2002-10-30
ZA200208777 2002-10-30

Publications (1)

Publication Number Publication Date
WO2004040095A1 true WO2004040095A1 (en) 2004-05-13

Family

ID=32231603

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/003892 WO2004040095A1 (en) 2002-10-30 2003-09-12 Tool insert

Country Status (9)

Country Link
US (1) US20060144621A1 (en)
EP (1) EP1565642B1 (en)
CN (1) CN100557188C (en)
AT (1) ATE493559T1 (en)
AU (1) AU2003259458A1 (en)
CA (1) CA2504518C (en)
DE (1) DE60335568D1 (en)
WO (1) WO2004040095A1 (en)
ZA (1) ZA200503785B (en)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405424A (en) * 2003-08-29 2005-03-02 Smith International Cutting element structure for roller cone bit
WO2007069025A3 (en) * 2005-12-12 2007-09-13 Element Six Production Pty Ltd Cutting method
WO2007122489A2 (en) * 2006-04-21 2007-11-01 Element Six (Production) (Pty) Ltd Method of making a cbn compact
US7303030B2 (en) 2003-11-25 2007-12-04 Smith International, Inc. Barrier coated granules for improved hardfacing material
US7726420B2 (en) 2004-04-30 2010-06-01 Smith International, Inc. Cutter having shaped working surface with varying edge chamfer
US7757791B2 (en) 2005-01-25 2010-07-20 Smith International, Inc. Cutting elements formed from ultra hard materials having an enhanced construction
US7828088B2 (en) 2005-05-26 2010-11-09 Smith International, Inc. Thermally stable ultra-hard material compact construction
US7836981B2 (en) 2005-02-08 2010-11-23 Smith International, Inc. Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US7874383B1 (en) 2005-01-17 2011-01-25 Us Synthetic Corporation Polycrystalline diamond insert, drill bit including same, and method of operation
US7942219B2 (en) 2007-03-21 2011-05-17 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US7980334B2 (en) 2007-10-04 2011-07-19 Smith International, Inc. Diamond-bonded constructions with improved thermal and mechanical properties
US8020643B2 (en) 2005-09-13 2011-09-20 Smith International, Inc. Ultra-hard constructions with enhanced second phase
US8028771B2 (en) 2007-02-06 2011-10-04 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US8057562B2 (en) 2006-02-09 2011-11-15 Smith International, Inc. Thermally stable ultra-hard polycrystalline materials and compacts
US8083012B2 (en) 2008-10-03 2011-12-27 Smith International, Inc. Diamond bonded construction with thermally stable region
US8197936B2 (en) 2005-01-27 2012-06-12 Smith International, Inc. Cutting structures
US8309050B2 (en) 2005-05-26 2012-11-13 Smith International, Inc. Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance
US8377157B1 (en) 2009-04-06 2013-02-19 Us Synthetic Corporation Superabrasive articles and methods for removing interstitial materials from superabrasive materials
US8499861B2 (en) 2007-09-18 2013-08-06 Smith International, Inc. Ultra-hard composite constructions comprising high-density diamond surface
US8590130B2 (en) 2009-05-06 2013-11-26 Smith International, Inc. Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same
US8771389B2 (en) 2009-05-06 2014-07-08 Smith International, Inc. Methods of making and attaching TSP material for forming cutting elements, cutting elements having such TSP material and bits incorporating such cutting elements
US8783389B2 (en) 2009-06-18 2014-07-22 Smith International, Inc. Polycrystalline diamond cutting elements with engineered porosity and method for manufacturing such cutting elements
US8852304B2 (en) 2004-05-06 2014-10-07 Smith International, Inc. Thermally stable diamond bonded materials and compacts
US8881851B2 (en) 2003-12-05 2014-11-11 Smith International, Inc. Thermally-stable polycrystalline diamond materials and compacts
US8932376B2 (en) 2005-10-12 2015-01-13 Smith International, Inc. Diamond-bonded bodies and compacts with improved thermal stability and mechanical strength
US8951317B1 (en) 2009-04-27 2015-02-10 Us Synthetic Corporation Superabrasive elements including ceramic coatings and methods of leaching catalysts from superabrasive elements
US9144886B1 (en) 2011-08-15 2015-09-29 Us Synthetic Corporation Protective leaching cups, leaching trays, and methods for processing superabrasive elements using protective leaching cups and leaching trays
US9233422B2 (en) 2009-05-15 2016-01-12 Element Six Limited Superhard cutter element
US9297211B2 (en) 2007-12-17 2016-03-29 Smith International, Inc. Polycrystalline diamond construction with controlled gradient metal content
US9352447B2 (en) 2009-09-08 2016-05-31 Us Synthetic Corporation Superabrasive elements and methods for processing and manufacturing the same using protective layers
US9394747B2 (en) 2012-06-13 2016-07-19 Varel International Ind., L.P. PCD cutters with improved strength and thermal stability
US9550276B1 (en) 2013-06-18 2017-01-24 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US9789587B1 (en) 2013-12-16 2017-10-17 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US9908215B1 (en) 2014-08-12 2018-03-06 Us Synthetic Corporation Systems, methods and assemblies for processing superabrasive materials
US9931732B2 (en) 2004-09-21 2018-04-03 Smith International, Inc. Thermally stable diamond polycrystalline diamond constructions
US10011000B1 (en) 2014-10-10 2018-07-03 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US10723626B1 (en) 2015-05-31 2020-07-28 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US10807913B1 (en) 2014-02-11 2020-10-20 Us Synthetic Corporation Leached superabrasive elements and leaching systems methods and assemblies for processing superabrasive elements
US10900291B2 (en) 2017-09-18 2021-01-26 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same
US11766761B1 (en) 2014-10-10 2023-09-26 Us Synthetic Corporation Group II metal salts in electrolytic leaching of superabrasive materials

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7395882B2 (en) 2004-02-19 2008-07-08 Baker Hughes Incorporated Casing and liner drilling bits
US7624818B2 (en) * 2004-02-19 2009-12-01 Baker Hughes Incorporated Earth boring drill bits with casing component drill out capability and methods of use
US7954570B2 (en) 2004-02-19 2011-06-07 Baker Hughes Incorporated Cutting elements configured for casing component drillout and earth boring drill bits including same
US7942218B2 (en) 2005-06-09 2011-05-17 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US7836978B2 (en) * 2007-06-15 2010-11-23 Baker Hughes Incorporated Cutting elements for casing component drill out and subterranean drilling, earth boring drag bits and tools including same and methods of use
US7954571B2 (en) 2007-10-02 2011-06-07 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
KR100942983B1 (en) * 2007-10-16 2010-02-17 주식회사 하이닉스반도체 Semiconductor device and method for manufacturing the same
US8789894B2 (en) * 2009-01-13 2014-07-29 Diamond Innovations, Inc. Radial tool with superhard cutting surface
US8887839B2 (en) 2009-06-25 2014-11-18 Baker Hughes Incorporated Drill bit for use in drilling subterranean formations
RU2012103935A (en) 2009-07-08 2013-08-20 Бейкер Хьюз Инкорпорейтед CUTTING ELEMENT AND METHOD FOR ITS FORMATION
RU2012103934A (en) * 2009-07-08 2013-08-20 Бейкер Хьюз Инкорпорейтед CUTTING ELEMENT FOR DRILLING BIT USED FOR DRILLING UNDERGROUND ROCKS
EP2459344A4 (en) 2009-07-27 2013-10-02 Baker Hughes Inc Abrasive article and method of forming
EP2480747A2 (en) * 2009-09-25 2012-08-01 Baker Hughes Incorporated Cutting element and method of forming thereof
CN102071877A (en) * 2010-12-30 2011-05-25 西南石油大学 Polycrystalline diamond compact
US8807247B2 (en) 2011-06-21 2014-08-19 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and methods of forming such cutting elements for earth-boring tools
CA2884374C (en) * 2012-09-11 2019-09-17 Halliburton Energy Services, Inc. Cutter for use in well tools
US11015397B2 (en) 2014-12-31 2021-05-25 Schlumberger Technology Corporation Cutting elements and drill bits incorporating the same
US20180355670A1 (en) * 2017-06-08 2018-12-13 Varel International Ind., L.L.C. Hybrid roller-mill bit and hybrid roller-drag bit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462955A1 (en) * 1990-06-15 1991-12-27 Sandvik Aktiebolag Improved tools for cutting rock drilling
US5979571A (en) * 1996-09-27 1999-11-09 Baker Hughes Incorporated Combination milling tool and drill bit
US20010035302A1 (en) * 1998-03-13 2001-11-01 Desai Praful C Method for milling casing and drilling formation
US20020074168A1 (en) * 2000-09-20 2002-06-20 Matthias Terry R. Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE62468B1 (en) * 1987-02-09 1995-02-08 De Beers Ind Diamond Abrasive product
DE68919454T2 (en) * 1988-08-15 1995-04-06 De Beers Ind Diamond Tool insert.
IT1243302B (en) * 1990-06-19 1994-05-26 St Microelectronics Srl MULTI-CONTACT UNIVERSAL CONNECTION BETWEEN EWS PROBE CARD AND TEST CARD FOR A TEST STATION ON SLICE OF SEMICONDUCTOR DEVICES.
ZA935525B (en) * 1992-08-06 1994-02-24 De Beers Ind Diamond Tool insert
US6009963A (en) * 1997-01-14 2000-01-04 Baker Hughes Incorporated Superabrasive cutting element with enhanced stiffness, thermal conductivity and cutting efficiency
US6003623A (en) * 1998-04-24 1999-12-21 Dresser Industries, Inc. Cutters and bits for terrestrial boring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462955A1 (en) * 1990-06-15 1991-12-27 Sandvik Aktiebolag Improved tools for cutting rock drilling
US5979571A (en) * 1996-09-27 1999-11-09 Baker Hughes Incorporated Combination milling tool and drill bit
US20010035302A1 (en) * 1998-03-13 2001-11-01 Desai Praful C Method for milling casing and drilling formation
US20020074168A1 (en) * 2000-09-20 2002-06-20 Matthias Terry R. Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength

Cited By (73)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405424B (en) * 2003-08-29 2006-09-13 Smith International Cutting element structure for roller cone bit
GB2405424A (en) * 2003-08-29 2005-03-02 Smith International Cutting element structure for roller cone bit
US7303030B2 (en) 2003-11-25 2007-12-04 Smith International, Inc. Barrier coated granules for improved hardfacing material
US8881851B2 (en) 2003-12-05 2014-11-11 Smith International, Inc. Thermally-stable polycrystalline diamond materials and compacts
US7726420B2 (en) 2004-04-30 2010-06-01 Smith International, Inc. Cutter having shaped working surface with varying edge chamfer
US8037951B2 (en) 2004-04-30 2011-10-18 Smith International, Inc. Cutter having shaped working surface with varying edge chamfer
US8852304B2 (en) 2004-05-06 2014-10-07 Smith International, Inc. Thermally stable diamond bonded materials and compacts
US9931732B2 (en) 2004-09-21 2018-04-03 Smith International, Inc. Thermally stable diamond polycrystalline diamond constructions
US10350731B2 (en) 2004-09-21 2019-07-16 Smith International, Inc. Thermally stable diamond polycrystalline diamond constructions
US7874383B1 (en) 2005-01-17 2011-01-25 Us Synthetic Corporation Polycrystalline diamond insert, drill bit including same, and method of operation
US7757791B2 (en) 2005-01-25 2010-07-20 Smith International, Inc. Cutting elements formed from ultra hard materials having an enhanced construction
US8197936B2 (en) 2005-01-27 2012-06-12 Smith International, Inc. Cutting structures
US8567534B2 (en) 2005-02-08 2013-10-29 Smith International, Inc. Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US7836981B2 (en) 2005-02-08 2010-11-23 Smith International, Inc. Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US7946363B2 (en) 2005-02-08 2011-05-24 Smith International, Inc. Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US8157029B2 (en) 2005-02-08 2012-04-17 Smith International, Inc. Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US8852546B2 (en) 2005-05-26 2014-10-07 Smith International, Inc. Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance
US8309050B2 (en) 2005-05-26 2012-11-13 Smith International, Inc. Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance
US8056650B2 (en) 2005-05-26 2011-11-15 Smith International, Inc. Thermally stable ultra-hard material compact construction
US7828088B2 (en) 2005-05-26 2010-11-09 Smith International, Inc. Thermally stable ultra-hard material compact construction
US8020643B2 (en) 2005-09-13 2011-09-20 Smith International, Inc. Ultra-hard constructions with enhanced second phase
US8932376B2 (en) 2005-10-12 2015-01-13 Smith International, Inc. Diamond-bonded bodies and compacts with improved thermal stability and mechanical strength
WO2007069025A3 (en) * 2005-12-12 2007-09-13 Element Six Production Pty Ltd Cutting method
US8057562B2 (en) 2006-02-09 2011-11-15 Smith International, Inc. Thermally stable ultra-hard polycrystalline materials and compacts
WO2007122490A2 (en) * 2006-04-21 2007-11-01 Element Six (Production) (Pty) Ltd cBN COMPOSITE MATERIAL AND TOOL
KR101409123B1 (en) 2006-04-21 2014-06-17 엘리먼트 씩스 (프로덕션) (피티와이) 리미티드 cBN COMPOSITE MATERIAL AND TOOL
WO2007122489A2 (en) * 2006-04-21 2007-11-01 Element Six (Production) (Pty) Ltd Method of making a cbn compact
US8414229B2 (en) 2006-04-21 2013-04-09 Element Six Abrasives S.A. cBN composite material and tool
WO2007122490A3 (en) * 2006-04-21 2008-11-20 Element Six Production Pty Ltd cBN COMPOSITE MATERIAL AND TOOL
WO2007122489A3 (en) * 2006-04-21 2008-11-20 Element Six Production Pty Ltd Method of making a cbn compact
US9387571B2 (en) 2007-02-06 2016-07-12 Smith International, Inc. Manufacture of thermally stable cutting elements
US10124468B2 (en) 2007-02-06 2018-11-13 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US8028771B2 (en) 2007-02-06 2011-10-04 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US7942219B2 (en) 2007-03-21 2011-05-17 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US10132121B2 (en) 2007-03-21 2018-11-20 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US8499861B2 (en) 2007-09-18 2013-08-06 Smith International, Inc. Ultra-hard composite constructions comprising high-density diamond surface
US7980334B2 (en) 2007-10-04 2011-07-19 Smith International, Inc. Diamond-bonded constructions with improved thermal and mechanical properties
US10076824B2 (en) 2007-12-17 2018-09-18 Smith International, Inc. Polycrystalline diamond construction with controlled gradient metal content
US9297211B2 (en) 2007-12-17 2016-03-29 Smith International, Inc. Polycrystalline diamond construction with controlled gradient metal content
US8622154B2 (en) 2008-10-03 2014-01-07 Smith International, Inc. Diamond bonded construction with thermally stable region
US8365844B2 (en) 2008-10-03 2013-02-05 Smith International, Inc. Diamond bonded construction with thermally stable region
US9404309B2 (en) 2008-10-03 2016-08-02 Smith International, Inc. Diamond bonded construction with thermally stable region
US8083012B2 (en) 2008-10-03 2011-12-27 Smith International, Inc. Diamond bonded construction with thermally stable region
US8741005B1 (en) 2009-04-06 2014-06-03 Us Synthetic Corporation Superabrasive articles and methods for removing interstitial materials from superabrasive materials
US8377157B1 (en) 2009-04-06 2013-02-19 Us Synthetic Corporation Superabrasive articles and methods for removing interstitial materials from superabrasive materials
US8951317B1 (en) 2009-04-27 2015-02-10 Us Synthetic Corporation Superabrasive elements including ceramic coatings and methods of leaching catalysts from superabrasive elements
US10105820B1 (en) 2009-04-27 2018-10-23 Us Synthetic Corporation Superabrasive elements including coatings and methods for removing interstitial materials from superabrasive elements
US9115553B2 (en) 2009-05-06 2015-08-25 Smith International, Inc. Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same
US8771389B2 (en) 2009-05-06 2014-07-08 Smith International, Inc. Methods of making and attaching TSP material for forming cutting elements, cutting elements having such TSP material and bits incorporating such cutting elements
US8590130B2 (en) 2009-05-06 2013-11-26 Smith International, Inc. Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same
US9233422B2 (en) 2009-05-15 2016-01-12 Element Six Limited Superhard cutter element
US8783389B2 (en) 2009-06-18 2014-07-22 Smith International, Inc. Polycrystalline diamond cutting elements with engineered porosity and method for manufacturing such cutting elements
US11420304B2 (en) 2009-09-08 2022-08-23 Us Synthetic Corporation Superabrasive elements and methods for processing and manufacturing the same using protective layers
US9352447B2 (en) 2009-09-08 2016-05-31 Us Synthetic Corporation Superabrasive elements and methods for processing and manufacturing the same using protective layers
US11383217B1 (en) 2011-08-15 2022-07-12 Us Synthetic Corporation Protective leaching cups, leaching trays, and methods for processing superabrasive elements using protective leaching cups and leaching trays
US9144886B1 (en) 2011-08-15 2015-09-29 Us Synthetic Corporation Protective leaching cups, leaching trays, and methods for processing superabrasive elements using protective leaching cups and leaching trays
US10265673B1 (en) 2011-08-15 2019-04-23 Us Synthetic Corporation Protective leaching cups, leaching trays, and methods for processing superabrasive elements using protective leaching cups and leaching trays
US9394747B2 (en) 2012-06-13 2016-07-19 Varel International Ind., L.P. PCD cutters with improved strength and thermal stability
US11370664B1 (en) 2013-06-18 2022-06-28 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US9783425B1 (en) 2013-06-18 2017-10-10 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US9550276B1 (en) 2013-06-18 2017-01-24 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US10183867B1 (en) 2013-06-18 2019-01-22 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US9789587B1 (en) 2013-12-16 2017-10-17 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US10807913B1 (en) 2014-02-11 2020-10-20 Us Synthetic Corporation Leached superabrasive elements and leaching systems methods and assemblies for processing superabrasive elements
US11618718B1 (en) 2014-02-11 2023-04-04 Us Synthetic Corporation Leached superabrasive elements and leaching systems, methods and assemblies for processing superabrasive elements
US9908215B1 (en) 2014-08-12 2018-03-06 Us Synthetic Corporation Systems, methods and assemblies for processing superabrasive materials
US11253971B1 (en) 2014-10-10 2022-02-22 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US10011000B1 (en) 2014-10-10 2018-07-03 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US11766761B1 (en) 2014-10-10 2023-09-26 Us Synthetic Corporation Group II metal salts in electrolytic leaching of superabrasive materials
US10723626B1 (en) 2015-05-31 2020-07-28 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US11535520B1 (en) 2015-05-31 2022-12-27 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US10900291B2 (en) 2017-09-18 2021-01-26 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same
US11946320B2 (en) 2017-09-18 2024-04-02 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same

Also Published As

Publication number Publication date
ZA200503785B (en) 2006-08-30
AU2003259458A1 (en) 2004-05-25
CN1714225A (en) 2005-12-28
CA2504518C (en) 2011-08-09
ATE493559T1 (en) 2011-01-15
DE60335568D1 (en) 2011-02-10
CA2504518A1 (en) 2004-05-13
CN100557188C (en) 2009-11-04
EP1565642B1 (en) 2010-12-29
US20060144621A1 (en) 2006-07-06
EP1565642A1 (en) 2005-08-24

Similar Documents

Publication Publication Date Title
CA2504518C (en) Tool insert
US7594553B2 (en) Composite tool insert
US7836978B2 (en) Cutting elements for casing component drill out and subterranean drilling, earth boring drag bits and tools including same and methods of use
EP0916803B1 (en) Rotary drill bit for casing milling and formation drilling
US6612383B2 (en) Method and apparatus for milling well casing and drilling formation
US5979571A (en) Combination milling tool and drill bit
EP1242711B1 (en) Drilling bit for drilling while running casing
EP1926883B1 (en) Earth boring drill bit with casing component drill out capability, and method of use
CA2538545C (en) Fixed cutter drill bit for abrasive applications
SA520411653B1 (en) Earth-boring tools having a gauge region configured for reduced bit walk and method of drilling with same
ZA200503787B (en) Composite tool insert
US11834909B1 (en) Cutter insert for a section milling tool
US11085243B2 (en) Drill bit cutter
CN116507788A (en) Blade cover
Spyridakis Interinstitutional Master of Science Degree Programme “Hydrocarbon Exploration and Exploitation”

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2504518

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2005/03785

Country of ref document: ZA

Ref document number: 200503785

Country of ref document: ZA

WWE Wipo information: entry into national phase

Ref document number: 2003809804

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 20038256371

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2003809804

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2006144621

Country of ref document: US

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 10533046

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 10533046

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP