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公开(公告)号：GB2397832A
公开(公告)日：2004-08-04
申请号：GB0401258
申请日：2004-01-21
Applicant: SMITH INTERNATIONAL
Inventor： KEMBAIYAN KUMAR THIPPAIYAGOWDE , OLDHAM THOMAS W , ZHANG JOHN YOUHE
Abstract: An earth boring drill bit features a reinforcement member 32 produced from high strength steel having a Carbon content less than 0.3 % by weight, and featuring a yield strength of at least 379.2 MN/m , a tensile strength of at least 551.6 MN/m and a CVN-L toughness of 54.2Nm. In a preferred embodiment, the steel comprises Carbon in a range of 0.1 - 0.3 % by weight, Manganese in a range of 0.5 - 1.5% by weight, up to 0.8% by weight of Chromium, 0.05 - 0.4% by weight Nickel and 0.02 - 0.8% by weight Molybdenum. Also claimed is an earth boring drill bit featuring a wear resistant outer body, an end configured for connection to a drill string, and a cutting member mounted on the outer surface of the bit.
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公开(公告)号：CA2455716A1
公开(公告)日：2004-07-31
申请号：CA2455716
申请日：2004-01-21
Applicant: SMITH INTERNATIONAL
Inventor： KEMBAIYAN KUMAR T , ZHANG JOHN YOUHE , OLDHAM THOMAS W
Abstract: Drill bit reinforcing members or blanks of this invention are formed from hi gh- strength steels having a carbon content less than about 0.3 percent by weight, a yiel d strength of at least 55,000 psi, a tensile strength of at least 80,000 psi, a toughness of at lea st 40 CVN-L, Ft-lb, and a rate of expansion percentage change less than about 0.0025 %/.degree.F durin g austenitic to ferritic phase transformation. In one embodiment, such steel comprises in the range o f from about 0.1 to 0.3 percent by weight carbon, 0.5 to 1.5 percent by weight manganese, up to about 0.8 percent by weight chromium, 0.05 to 4 percent by weight nickel, and 0.02 to 0.8 percent by weight molybdenum. In another example, such steel comprises in the range of from about 0.1 to 0.3 percent by weight carbon, 0.9 to 1.5 percent by weight manganese, 0.1 to 0.5 percent by weight silicon, and one or more microalloying element selected from the group consisting of vanadium, niobium, titanium, zirconium, aluminum and mixtures thereof.
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公开(公告)号：GB2393449A
公开(公告)日：2004-03-31
申请号：GB0322502
申请日：2003-09-25
Applicant: SMITH INTERNATIONAL
Inventor： KEMBAIYAN KUMAR THIPPAIYAGOWDE , OLDHAM THOMAS W
Abstract: A rock bit drilling or cutting body is made from a sintered spherical tungsten carbide and a nickel, cobalt or iron infiltration binder. Particles of cast tungsten carbide and carburized tungsten carbide may also be present in the material. The body is made by packing a mould with tungsten carbide, which include pellets of cemented tungsten carbide, and optionally nickel powder. The mould is then infiltrated with a binder alloy.
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公开(公告)号：GB2353053B
公开(公告)日：2003-10-15
申请号：GB0016244
申请日：2000-06-30
Applicant: SMITH INTERNATIONAL
Inventor： TRUAX DAVID K , OLDHAM THOMAS W , VAN WAES DUANE R , PENUEL CARL EDWARD
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公开(公告)号：GB2353053A
公开(公告)日：2001-02-14
申请号：GB0016244
申请日：2000-06-30
Applicant: SMITH INTERNATIONAL
Inventor： TRUAX DAVID K , OLDHAM THOMAS W , VAN WAES DUANE R , PENUEL CARL EDWARD
Abstract: An earth-boring drill bit [20] consists of a bit body [26] and a number of cutting structure inserts [10], at least a portion of which are impregnated with diamonds. The cutting structure inserts [10] may have a total thermal exposure of less than 25 minutes above 800{ during the manufacture of the drill bit [20], while the bit body [26] is thermally exposed for longer periods at the same temperatures. The bit body [26] may also be impregnated with diamonds, which can be either natural or synthetic, and the bit body [26] may have integrally formed blades. The cutting structure inserts [10] may be attached to the bit body by the use of adhesive, brazing or mechanical means.
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Patent Agency Ranking
公开(公告)号：CA1336285C
公开(公告)日：1995-07-11
申请号：CA585562
申请日：1988-12-09
Applicant: SMITH INTERNATIONAL
Inventor： KESHAVAN MADAPUSI K , UNDERWOOD LANCE D , KAR NARESH J , OLDHAM THOMAS W , ROTH CARY A , ARMSTRONG BRIAN J
Abstract: A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 80 mesh single crystal monotungsten carbide.
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公开(公告)号：CA2851894C
公开(公告)日：2015-12-01
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：CA2548247C
公开(公告)日：2014-07-22
申请号：CA2548247
申请日：2006-05-26
Applicant: SMITH INTERNATIONAL
Inventor： MIDDLEMISS STEWART N , BELNAP J DANIEL , MOURIK NEPHI , OLDHAM THOMAS W , GRIFFO ANTHONY
IPC: C04B35/575 , B23B51/00 , C04B35/645
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：CA2520319C
公开(公告)日：2014-02-11
申请号：CA2520319
申请日：2005-09-21
Applicant: SMITH INTERNATIONAL
Inventor： EYRE RONALD K , OLDHAM THOMAS W , GRIFFO ANTHONY
IPC: C01B31/06 , B22F7/06 , C04B35/52 , E21B10/46 , E21B10/567
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 0.02 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 0.02 mm, 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：CA2489187C
公开(公告)日：2012-08-28
申请号：CA2489187
申请日：2004-12-03
Applicant: SMITH INTERNATIONAL
Inventor： BELNAP JOHN DANIEL , MIDDLEMISS STEWART N , GRIFFO ANTHONY , OLDHAM THOMAS W , KEMBAIYAN KUMAR T
IPC: C30B29/04 , B01J3/06 , B22F7/06 , B24D3/00 , B24D11/00 , C01B31/06 , C04B35/52 , C04B35/645 , C22C26/00 , C30B28/00 , C30B33/06 , E21B10/00 , E21B10/46 , E21B10/56 , E21B10/567 , E21B10/573
Abstract: Thermally-stable polycrystalline diamond materials of this invention 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, thereby providing an improved degree of thermal stability to the polycrystalline diamond material.
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