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31. 发明专利

ITTO980801A1 未知
公开(公告)号：ITTO980801A1
公开(公告)日：2000-03-22
申请号：ITTO980801
申请日：1998-09-22
申请人： BAKER HUGHES INC
发明人： SCOTT DANNY E , SMITH REDD H , HORTON RALPH M , CHAVES ARTUR A
IPC分类号： E21B10/56 , E21B10/573
摘要： Cutting elements providing a relatively constant superabrasive area in contact with the formation responsive to weight on bit during a substantial portion of the useful life of a circular cutting face cutting element or other cutting element exhibiting a non-linear cutting edge, for example, from about 5% diametrical wear to in excess of about 30% diametrical wear in the case of a circular cutting element, measured across the cutting face. The superabrasive table of the cutting element is configured, internally, externally, or both, to vary in depth radially and laterally, as required, so that an increase in width of the contact or wear flat area with the formation and the variation in table depth as the cutting element wears, are substantially offsetting. The rate of penetration of a drill bit so equipped may thus be maintained at a desirable magnitude without a substantial increase in weight on bit as the cutting element wears, since the superabrasive contact area is maintained relatively constant.

32. 发明专利

DE69416382T2 未知
公开(公告)号：DE69416382T2
公开(公告)日：1999-06-10
申请号：DE69416382
申请日：1994-11-22
申请人： BAKER HUGHES INC
发明人： LUND JEFFREY B , SMITH REDD H
IPC分类号： B23B27/14 , B24B1/00 , B24B3/60 , B24B53/02 , E21B10/56 , E21B10/567 , B24B37/00
摘要： A superhard cutting element (10') having a polished, low friction substantially planar cutting face (40) with a surface finish roughness of 254 nm (10 mu in.) or less and preferably 12,7 nm (0,5 mu in.) or less.

33. 发明专利

BE1010218A5 ELEMENT DE COUPE EN DIAMANT POLYCRISTALLIN. 未知
公开(公告)号：BE1010218A5
公开(公告)日：1998-04-07
申请号：BE9400154
申请日：1994-02-09
申请人： BAKER HUGHES INC
发明人： SMITH REDD H
IPC分类号： E21B10/56 , E21B10/573
摘要： L'invention concerne un élément de coupe super dur pour trépan de forage. Cet élément de coupe est fait d'un compact de diamant polycristallin et est destiné au forage de formations souterraines. Il comprend un substrat de carbure fritté (12) comportant des crêtes (16) saillantes qui s'étendent radialement d'un côté, sur lequel une tablette de diamant polycristallin (20) est formée de soudée pendant la formation de l'élément de coupe.

34. 发明专利

GB2316701A Stress-reduced superhard cutting element 未知
公开(公告)号：GB2316701A
公开(公告)日：1998-03-04
申请号：GB9722318
申请日：1995-06-16
申请人： BAKER HUGHES INC
发明人： SMITH REDD H , CHAVES ARTHUR A
IPC分类号： E21B10/56 , E21B10/573 , E21B10/46
摘要： A cutting element suitable for incorporation in a drill bit used for earth drilling is disclosed which comprises an abrasive layer 20 of superhard material formed on a substrate support 10, the substrate being structurally modified to reduce and/or redistribute detrimental tensile stresses which occur at the periphery of the abrasive layer and at or near the interface between the abrasive layer and the substrate, and within the body of the substrate. The modified cutting element structure reduces the occurrence of fracturing and cutter degradation. The substrate body 10 providing support for the abrasive layer 20 has an interfacial surface 38 to which is attached the abrasive layer 20 and a substantially planar surface spaced apart from and parallel to said interfacial surface 38, said substrate body 10 having a modified portion positioned in parallel orientation to said interfacial and substantially planar surfaces, e.g. a metal disc 30 and/or 34 set into a cylindrical carbide body.

35. 发明专利

AU681508B2 Stress-reduced superhard cutting element 未知
公开(公告)号：AU681508B2
公开(公告)日：1997-08-28
申请号：AU2164295
申请日：1995-06-14
申请人： BAKER HUGHES INC
发明人： SMITH REDD H , CHAVES ARTHUR A
IPC分类号： B23B27/14 , E21B10/56 , E21B10/573
摘要： A cutting element suitable for incorporation in a drill bit used for earth drilling is disclosed which comprises an abrasive layer of superhard material formed on a substrate support, the substrate and/or the abrasive layer being structurally modified to reduce and/or redistribute detrimental tensile stresses which occur at the periphery of the abrasive layer and at or near the interface between the abrasive layer and the substrate, and within the body of the substrate. The modified cutting element structure reduces the occurrence of fracturing and cutter degradation.

36. 发明专利

AU1479795A Fabrication method for matrix type drag bits and bits produced thereby 未知
公开(公告)号：AU1479795A
公开(公告)日：1995-09-28
申请号：AU1479795
申请日：1995-03-09
申请人： BAKER HUGHES INC
发明人： SMITH REDD H
IPC分类号： B22F3/105 , B22F3/26 , B22F7/06 , B29C67/00 , E21B10/54 , E21B10/55 , E21B10/56 , E21B10/567 , B23P15/28 , B23P17/00 , E21B10/00
摘要： A method of fabricating rotary drag bits for subterranean drilling by layering techniques such as are employed in rapid prototyping technology. Thin layers of powder may be sequentially deposited and fused or otherwise bonded to define the bit body, or thin sheets of material may be stacked, bonded and cut. Bit body components may also be formed by the method, and subsequently assembled with other components made in like manner or by other methods to produce a bit body. Bits fabricated according to the method are also disclosed.

37. 发明专利

GB2275068A Polycrystalline diamond cutting element 未知
公开(公告)号：GB2275068A
公开(公告)日：1994-08-17
申请号：GB9401326
申请日：1994-01-25
申请人： BAKER HUGHES INC
发明人： SMITH REDD H
IPC分类号： E21B10/56 , E21B10/573 , E21B10/46
摘要： A polycrystalline diamond compact cutting element for drilling subterranean formations includes a cemented carbide substrate 12 having radially extending raised lands 16 on one side thereof, to and over which is formed and bonded a polycrystalline diamond table 26. Various patterns of lands are described and the interface between the substrate 12 and cutting table 26 may be generally flat or curved.

38. 发明专利

CA2695520C EARTH-BORING TOOLS HAVING PARTICLE-MATRIX COMPOSITE BODIES, METHODS FOR WELDING PARTICLE-MATRIX COMPOSITE BODIES AND METHODS FOR REPAIRING PARTICLE-MATRIX COMPOSITE BODIES 未知
公开(公告)号：CA2695520C
公开(公告)日：2013-05-28
申请号：CA2695520
申请日：2008-08-04
申请人： BAKER HUGHES INC
发明人： SMITH REDD H , STEVENS JOHN H , OXFORD JAMES A
IPC分类号： B23K9/028 , B23K9/04 , B23K9/23 , B23K9/235 , B23K26/28 , B23K26/34 , B23K26/42 , B23P6/00 , E21B10/46
摘要： Methods for welding a particle-matrix composite body (120) to another body (154) and repairing particle-matrix composite bodies (120) are disclosed. Additionally, earth-boring tools (110) having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body (120) of an earth-boring tool (100) may be repaired by removing a damaged portion, heating the particle-matrix composite bit body (120), and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body (120) may be welded to a metallic body (154) by forming a joint, heating the particle-matrix composite body (120), melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body (120), metallic filler material and metallic body (154) at a controlled rate.

39. 发明专利

PL2129860T3 Sposób formowania zagłębień do przyjmowania elementów tnących świdra 未知
公开(公告)号：PL2129860T3
公开(公告)日：2012-03-30
申请号：PL08726771
申请日：2008-03-12
申请人： BAKER HUGHES INC
发明人： DUGGAN JAMES L , STEVENS JOHN H , SMITH REDD H
IPC分类号： E21B10/573 , E21B10/55

40. 发明专利

CA2672704A1 METHODS AND SYSTEMS FOR COMPACTION OF POWDERS IN FORMING EARTH-BORING TOOLS 未知
公开(公告)号：CA2672704A1
公开(公告)日：2008-07-17
申请号：CA2672704
申请日：2007-12-20
申请人： BAKER HUGHES INC
发明人： STEVENS JOHN H , SMITH REDD H
IPC分类号： B22F7/06 , C22C26/00 , C22C29/00 , E21B10/46
摘要： Methods for forming bodies of earth-boring drill bits and other tools inc lude milling a plurality of hard particles and a plurality of particles comp rising a matrix material to form a mill product comprising powder particles, separating the particles into a plurality of particle size fractions. Some of the particles from the fractions may be combined to form a powder mixture , which may be pressed to form a green body. Additional methods include mixi ng a plurality of hard particles and a plurality of particles comprising a m atrix material to form a powder mixture, and pressing the powder mixture wit h pressure having an oscillating magnitude to form a green body. In yet addi tional methods a powder mixture may be pressed within a deformable container to form a green body and drainage of liquid from the container is enabled a s the powder mixture is pressed.

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