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公开(公告)号：GB2408735B
公开(公告)日：2009-01-28
申请号：GB0426586
申请日：2004-12-03
Applicant: SMITH INTERNATIONAL
Inventor： BELNAP JOHN DANIEL , MIDDLEMISS STEWART , GRIFFO ANTHONY , OLDHAM THOMAS W , KEMBAIYAN KUMAR THIPPAIYAGOWDER
IPC: C01B31/06 , B01J3/06 , B22F7/06 , B24D3/00 , B24D11/00 , C04B35/52 , C04B35/645 , C22C26/00 , E21B10/00 , E21B10/56 , E21B10/567 , E21B10/573
Abstract: Thermally-stable polycrystalline diamond materials comprise a first phase including a plurality of bonded together diamond crystals, and a second phase including a reaction product formed between a binder/catalyst material and a material reactive with the binder/catalyst material. The reaction product is disposed within interstitial regions of the polycrystalline diamond material that exists between the bonded diamond crystals. The first and second phases are formed during a single high pressure/high temperature process condition. The reaction product has a coefficient of thermal expansion that is relatively closer to that of the bonded together diamond crystals than that of the binder/catalyst material.
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公开(公告)号：CA2598143A1
公开(公告)日：2008-02-29
申请号：CA2598143
申请日：2007-08-20
Applicant: SMITH INTERNATIONAL
Inventor： LOCKSTEDT ALAN W , OLDHAM THOMAS W
Abstract: A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.
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公开(公告)号：GB2434590A
公开(公告)日：2007-08-01
申请号：GB0701738
申请日：2007-01-30
Applicant: SMITH INTERNATIONAL
Inventor： LIANG DAH-BEN , GRIFFO ANTHONY , OLDHAM THOMAS W , LOCKWOOD GREGORY T
Abstract: A drill bit body 26 made from a matrix powder comprising & 30 weight % stoichiometric tungsten carbide particles with mesh size 325-625, & 40 weight % cemented tungsten carbide particles with mesh size 170-625, & 60 weight %, cast tungsten carbide particles with mesh size 60-325 and optionally nickel, cobalt, iron or alloys thereof. The bit body also comprises an infiltration binder of copper, nickel or alloys thereof. After formation of the bit body it has an erosion rate of less than 0.001 in/hr, a toughness of greater than 20 ksi(in ), and a transverse rupture strength of greater than 140 ksi. Cutting elements 32 are supported in the body 26.
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公开(公告)号：CA2851894A1
公开(公告)日：2006-11-26
申请号：CA2851894
申请日：2006-05-26
Applicant: SMITH INTERNATIONAL
Inventor： MIDDLEMISS STEWART N , BELNAP J DANIEL , MOURIK NEPHI , OLDHAM THOMAS W , GRIFFO ANTHONY
IPC: C04B35/645 , C04B35/52 , C04B41/87 , C30B33/06 , E21B10/46
Abstract: Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are thermally stable at temperatures greater than about 750°C. The thermally stable region can occupy a partial portion of or the entire ultra-hard material body. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable. The ultra-hard material body is attached to a desired substrate, an intermediate material is interposed between the body and the substrate, and the intermediate material joins the substrate and body together by high pressure/high temperature process.
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公开(公告)号：DE102005048687A1
公开(公告)日：2006-05-11
申请号：DE102005048687
申请日：2005-10-11
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
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Patent Agency Ranking
公开(公告)号：GB2408735A
公开(公告)日：2005-06-08
申请号：GB0426586
申请日：2004-12-03
Applicant: SMITH INTERNATIONAL
Inventor： BELNAP JOHN DANIEL , MIDDLEMISS STEWART , GRIFFO ANTHONY , OLDHAM THOMAS W , KEMBAIYAN KUMAR THIPPAIYAGOWDE
IPC: B01J3/06 , B22F7/06 , B24D3/00 , B24D11/00 , C01B31/06 , C04B35/52 , C04B35/645 , C22C26/00 , E21B10/00 , E21B10/56 , E21B10/567 , E21B10/573
Abstract: A polycrystalline diamond material comprises a first phase 12 of bonded together diamond crystals and a second phase 14 of a reaction product between a binder/catalyst material used to facilitate diamond bonding and a material that reacts with the binder/catalyst material. The reaction product occurs at interstitial regions between diamond crystals and has a coefficient of thermal expansion that is closer to that of the bonded diamond crystals that the CTE for the binder/catalyst material alone. The binder/catalyst may be a group VIII element such as cobalt and the reacting material may be silicon, silicon carbide, aluminium, boron, beryllium, molybdenum, niobium, tantalum, titanium, vanadium or zirconium. The PCD material can be attached to a carbide, nitride, carbonitride or cermet substrate and can be used to make cutting inserts and shear cutters in subterranean drill bits.
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公开(公告)号：CA2159796A1
公开(公告)日：1996-04-05
申请号：CA2159796
申请日：1995-10-03
Applicant: SMITH INTERNATIONAL
Inventor： LARSEN JAMES L , SIRACKI MICHAEL A , OLDHAM THOMAS W , KESHAVAN MADAPUSI K
Abstract: A composite mini-extended nozzle is disclosed that is designed to both resist erosion and be strong enough to withstand the shock of a downhole drilling environment. In addition, means are provided to shroud at least a portion of theextended nozzle to further protect a portion of the nozzle nearest the exit plane from downhole obstructions. A combination of materials used to form the nozzle may include a matrix of tungsten carbides with suitable binder joined to an outer metal jacket nozzle body. A third ceramic matrix material may be utilized to line or partially line an interior passage formed by the mini-extended nozzle and a reduced in diameter portion of the nozzle design may include a built-in fractureplane in the unlikely event the end of the nozzle hits an obstruction. The extended portion of the nozzle will shear off along this fracture plane thereby preventing a nozzle washout that likely would result in a trip out of the hole to repair the resultant damage to the rock bit.
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公开(公告)号：IE86274B1
公开(公告)日：2013-10-09
申请号：IE20120262
申请日：2005-09-20
Applicant: SMITH INTERNATIONAL
Inventor： EYRE RONALD K , OLDHAM THOMAS W , GRIFFO ANTHONY
Abstract: Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals. A metallic substrate is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region that is substantially free of a catalyst material that extends a partial depth from a surface into the body, and a second region that includes the catalyst material. The diamond body first region extends from the working surface to depth of at least about 0.02 mm to a depth of less than about 0.09 mm. The diamond body includes diamond crystals having an average diamond grain size of greater than about 0.02mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body. The body can include natural diamond grains and/or a blend of natural and synthetic diamond grains, and is treated to form the first region. Before treatment, a portion of the body to be treated is finished to an approximate final dimension so that the depth of the first region of the finished product is substantially the same as when treated. During treatment, catalyst materials as well as non-catalyst metallic materials are removed from the diamond body to provide a further enhanced degree of thermal stability.
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公开(公告)号：IE20110188A1
公开(公告)日：2011-07-20
申请号：IE20110188
申请日：2005-09-20
Applicant: SMITH INTERNATIONAL
Inventor： OLDHAM THOMAS W , GRIFFO ANTHONY , EYRE RONALD K
Abstract: Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals and interstitial regions disposed among the crystals. A metallic substrate is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region that is substantially free of a catalyst material that extends a partial depth from a surface into the body, and a second region that includes the catalyst material. The diamond body first region extends from the working surface to depth of at least about 0.02mm to a depth of less than about 0.09mm. The diamond body includes diamond crystals having an average diamond grain size of greater than about 0.02mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body. The body can include natural diamond grains and/or a blend of natural and synthetic diamond grains, and is treated to form the first region. Before treatment, a portion of the body to be treated is finished to an approximate final dimension so that the depth of the first region of the finished product is substantially the same as when treated. During treatment, catalyst materials as well as non-catalyst metallic materials are removed from the diamond body to provide a further enhanced degree of thermal stability.
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公开(公告)号：CA2576072C
公开(公告)日：2010-03-30
申请号：CA2576072
申请日：2007-01-29
Applicant: SMITH INTERNATIONAL
Inventor： LIANG DAH-BEN , GRIFFO ANTHONY , OLDHAM THOMAS W , LOCKWOOD GREGORY T
Abstract: A drill bit that includes a bit body formed from a matrix powder and at least one cutting element for engaging a formation, wherein the matrix powder included (a) stoichiometric tungsten carbide particles, (b) cemented tungsten carbide particles, and (c) cast tungsten carbide particles, and wherein after formation with the matrix powder, the bit has an erosion rate of less than 0.001 in/hr, a toughness of greater than 20 ksi(in0.5), and a transverse rupture strength of greater than 140 ksi is disclosed.
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