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31. 发明授权

EP1247787B1 Rotary seal for directional drilling tools 有权
标题翻译： Rotationsdichtungfürrichtungsgesteuerte Bohrwerkzeuge
公开(公告)号：EP1247787B1
公开(公告)日：2012-10-17
申请号：EP02251373.3
申请日：2002-02-27
申请人： Camco International (UK) Limited
发明人： Hughes, Peter Raymond , Griffin, Nigel Dennis , Colebrook, Mark
IPC分类号： B22F7/06 , C04B37/02 , C04B41/45 , C04B41/81 , C04B41/91 , E21B21/10 , F16K25/00 , C04B41/53 , C04B35/52 , B23B27/14 , F16C33/04
CPC分类号： C04B41/91 , B22F7/06 , B22F2005/001 , B22F2998/00 , B22F2999/00 , B23B27/145 , C04B35/52 , C04B41/459 , C04B41/53 , C04B41/81 , E21B21/10 , E21B2010/566 , F16K25/005 , B22F2207/03 , B22F1/0014 , C22C26/00

32. 发明授权

EP0898044B1 Rotary drag-type drill bit with drilling fluid nozzles 有权
标题翻译：带钻井液喷嘴的旋转拖曳式钻头
公开(公告)号：EP0898044B1
公开(公告)日：2005-05-11
申请号：EP98306440.3
申请日：1998-08-12
申请人： Camco International (UK) Limited
发明人： Taylor, Steven
IPC分类号： E21B10/60 , E21B10/54 , E21B10/56
CPC分类号： E21B10/43 , E21B10/55 , E21B10/5673 , E21B10/602 , E21B2010/566

33. 发明公开

EP1356185A1 A METHOD AND DRILL BIT FOR REDUCING THE CUTTINGS SIZE TO A PREDETERMINED MAXIMUM SIZE 有权
标题翻译：方法和钻头降低切削尺寸对预定的最大尺寸
公开(公告)号：EP1356185A1
公开(公告)日：2003-10-29
申请号：EP01985461.1
申请日：2001-12-21
申请人： Moe, Per Thomas
发明人： Moe, Per Thomas
IPC分类号： E21B10/38 , E21B21/00
CPC分类号： E21B10/43 , E21B10/54 , E21B2010/566
摘要： In a method for percussive drilling of the holes in the ground, e.g. geothermal wells, use is made of water as drilling fluid and of a percussive drill bit (1) which is arranged to crush the cuttings to such small particles that the drilling water can carry them along up to the surface, notwithstanding its low viscosity and density as compared to usual drilling mud. For this purpose the return flow channels (9) of the drill bit are provided with such a small depth that only particles small enough may pass. The drill bit is provided with several rows of hard metal buttons (5-8), whereof the outermost (5) are relatively closely spaced and, in addition, are provided with a diamond coating. The buttons (6 and 7) on the inside do not have such a coating, so that they will be worn faster than the outer buttons (5) and give warning that the drill bit should be replaced before the outer and dimension determining buttons (5) have been subjected to noticeable wear. An outlet (10) for drilling fluid is placed centrally enough in the drill bit to overlap with the central axis (11) thereof.

34. 发明公开

EP1324960A1 POLYCRYSTALLINE DIAMOND WITH A SURFACE DEPLETED OF CATALYZING MATERIAL 有权
标题翻译：与催化剂材料耗尽表面聚晶金刚石
公开(公告)号：EP1324960A1
公开(公告)日：2003-07-09
申请号：EP01940727.9
申请日：2001-06-25
申请人： Schlumberger Holdings Limited , Camco International (UK) Limited
发明人： GRIFFIN, Nigel, Dennis , HUGHES, Peter, Raymond
IPC分类号： C04B35/52 , C04B41/53 , B23B27/14 , E21B10/50
CPC分类号： B22F7/06 , B22F2003/244 , B22F2005/001 , B22F2998/00 , B22F2999/00 , B23B27/145 , C04B35/52 , C04B35/645 , C04B37/021 , C04B41/009 , C04B41/459 , C04B41/53 , C04B41/81 , C04B41/91 , C04B2235/405 , C04B2235/427 , C04B2235/75 , C04B2237/363 , C04B2237/401 , E21B10/006 , E21B10/43 , E21B10/5673 , E21B10/5676 , E21B10/5735 , E21B10/602 , E21B2010/566 , C04B41/4539 , C04B41/5001 , C04B41/4564 , C04B41/5144 , B22F2207/03 , B22F1/0014 , C22C26/00
摘要： The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material. This translates to higher wear resistance in cutting applications, higher heat transfer capacity in heat sink applications, and has advantages in numerous other applications including hollow dies, indentors, tool mandrels, and wear elements.

35. 发明公开

EP1247787A1 Rotary seal for directional drilling tools 有权
标题翻译：旋转密封用于定向控制钻具
公开(公告)号：EP1247787A1
公开(公告)日：2002-10-09
申请号：EP02251373.3
申请日：2002-02-27
申请人： Camco International (UK) Limited
发明人： Hughes, Peter Raymond , Griffin, Nigel Dennis , Colebrook, Mark
IPC分类号： C04B35/52 , C04B41/53 , B23B27/14 , E21B10/50 , F16C33/04 , E21B4/00
CPC分类号： C04B41/91 , B22F7/06 , B22F2005/001 , B22F2998/00 , B22F2999/00 , B23B27/145 , C04B35/52 , C04B41/459 , C04B41/53 , C04B41/81 , E21B21/10 , E21B2010/566 , F16K25/005 , B22F2207/03 , B22F1/0014 , C22C26/00
摘要： A rotary valve assembly for a rotary steerable tool is disclosed for directing flow of an abrasive laden drilling fluid; the valve assembly has a first sealing surface rotatably engaging a second sealing surface. At least one of the surfaces (54) has at least about 5% of its area comprising interconnecting voids (60) to an average depth of at least 0.02mm. The interconnected voids allow fluid pressure to equalize between the sealing faces by flowing through the interconnecting voids to the sealing surfaces. Because the fit of the sealing surfaces of the valve is less than perfect, and because the voids on mating surfaces do not necessarily overlap, the 5% of the surface area comprising interconnected voids can easily translate to a 10% or more reduction in sealed area when both sealing surfaces have the interconnecting voids. The additional reduction in surface area subjected to differential pressure has substantially eliminated the hydraulic lock problem previously encountered upon startup.

36. 发明公开

EP1191001A3 Rotary drill bit design method 有权
标题翻译：旋转钻头设计方法
公开(公告)号：EP1191001A3
公开(公告)日：2002-04-03
申请号：EP01307739.1
申请日：2001-09-11
申请人： Camco International (UK) Limited
发明人： Griffin, Nigel Dennis , Hughes, Peter Raymond , Matthias, Terry R.
IPC分类号： C04B35/52 , C04B41/53 , B23B27/14 , B23B27/20 , E21B10/60
CPC分类号： B22F7/06 , B22F2003/244 , B22F2005/001 , B22F2998/00 , B22F2999/00 , B23B27/145 , C04B35/645 , C04B37/001 , C04B41/009 , C04B41/459 , C04B41/53 , C04B41/81 , C04B41/91 , C04B2237/36 , C04B2237/363 , E21B10/006 , E21B10/43 , E21B10/5673 , E21B10/5676 , E21B10/5735 , E21B10/602 , E21B2010/566 , C04B41/4539 , C04B41/5001 , C04B41/4564 , C04B41/5144 , C04B35/5626 , C04B35/52 , B22F2207/03 , B22F1/0014 , C22C26/00
摘要： A method for use in designing rotary drill bits comprises determining locations in which cutters are to be provided, determining likely wear rates for cutters positioned at those locations, and using the likely wear rates to chose between relatively high and relatively low wear rate cutters for each location. The cutters all have substantially the same impact toughness.
摘要翻译：用于设计旋转钻头的方法包括确定将要提供切割器的位置，确定可能的位于那些位置的切割器的磨损率，以及使用可能的磨损率在相对较高和较低磨损率切割器之间选择每一个位置。切割机都具有基本相同的冲击韧性。

37. 发明公开

EP1188898A2 Improvements in or relating to preform cutting elements for rotary drill bits 失效
标题翻译：用于旋转钻头的预成型件切割元件或与之有关的改进
公开(公告)号：EP1188898A2
公开(公告)日：2002-03-20
申请号：EP01127883.5
申请日：1997-10-10
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Taylor, Malcolm Roy , Griffin, Nigel Dennis , Roberts, Tom Scott
IPC分类号： E21B10/56
CPC分类号： E21B10/5673 , E21B10/5735 , E21B2010/566
摘要： A preform cutting element for a rotary drag-type drill bit comprises a front facing table (28) of superhard material having a front surface, a peripheral surface, a rear surface bonded to a substrate (29) of less hard material, and a cutting edge (35) formed by at least part of the junction between the front surface and the peripheral surface. The front surface of the facing table is formed with a chip-breaking formation which is located adjacent the cutting edge and is shaped to deflect transversely of the front surface of the facing table cuttings which, in use, are removed by the cutting edge from the formation being drilled. The chip-breaking formation comprises a projection (34) which upstands from the front surface of the facing table.
摘要翻译：用于旋转拖曳式钻头的预制件切割元件包括超硬材料的正面工作台（28），该正面工作台具有前表面，外围表面，粘合到较硬材料基底（29）的后表面以及切割边缘（35）由前表面和外围表面之间的至少一部分接合部形成。面对台的前表面形成有切屑形成部，该切屑形成部位于切削刃附近并且被成形为横向于面对台的前表面偏斜，该切削刃在使用中被切削刃从正在钻探地层。断屑构造包括从面对台的前表面竖立的突起（34）。

38. 发明公开

EP0898044A3 Rotary drag-type drill bit with drilling fluid nozzles 有权
标题翻译：旋挖铣刀与Bohrflüssigkeitsdüsen
公开(公告)号：EP0898044A3
公开(公告)日：2000-10-18
申请号：EP98306440.3
申请日：1998-08-12
申请人： Camco International (UK) Limited
发明人： Taylor, Steven
IPC分类号： E21B10/60 , E21B10/54 , E21B10/56
CPC分类号： E21B10/43 , E21B10/55 , E21B10/5673 , E21B10/602 , E21B2010/566
摘要： A drag-type drill bit for drilling holes in subsurface formations comprises a bit body (70) having an end face (71) and a shank (72) for connection to a drill string, a number of blades (73, 74) upstanding from the end face of the bit body and extending outwardly away from the axis of rotation of the bit, a number of cutters (76) mounted on each blade, and a number of nozzles (81) in the bit body for delivering drilling fluid for cooling and cleaning the cutters. The blades include primary blades (73) which, at their outer ends, are spaced apart around a peripheral gauge portion (75) of the bit, and secondary blades (74) which are spaced circumferentially between adjacent primary blades, each secondary blade having an outer end which terminates at a location inwardly of the gauge portion (75) of the bit. One of said nozzles (81) is located adjacent each blade (73, 74). Each primary blade (73) and associated secondary blade (74) may be equivalent, in terms of their combined contribution to the cutting profile, to a single blade which extends continuously from the centre of the bit body to the gauge, but the separation of the blades facilitates the flow of drilling fluid over and between the blades. Also, the increased number of blades may enhance the stability of the drill bit and reduce vibration.

39. 发明公开

EP0835981A3 Cutting structure for rotary drill bits 失效
标题翻译：对于旋转钻头切削结构
公开(公告)号：EP0835981A3
公开(公告)日：1999-03-17
申请号：EP97308020.3
申请日：1997-10-10
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Fuller, John Michael
IPC分类号： E21B10/56
CPC分类号： E21B10/55 , E21B10/567 , E21B10/5676 , E21B10/602 , E21B2010/566
摘要： A cutting structure for a rotary drag-type drill bit includes a preform cutting element (12) mounted on a carrier (16) which, in use, is mounted on the drill bit and comprises a front facing table (13) of superhard material bonded to a less hard substrate (14). A portion (19) of the carrier on which the preform cutting element is mounted is shaped, adjacent the cutting element (12), for engagement by a chip (22) of formation material being removed by the cutting element from the formation (21) being drilled so as to tend to break the chip away from the surface of the formation. A portion of the carrier, or a portion of the bit body itself, may also be shaped, adjacent the cutting element, to direct to a location in front of the cutting element a flow of drilling fluid (48) which impinges on said surface so as to assist in chip removal.

40. 发明公开

EP0656458A2 Superhard cutting element having reduced surface roughness 失效
标题翻译： Superhartes Schneideelement mit verringerterOberflächenrauhigkeit。
公开(公告)号：EP0656458A2
公开(公告)日：1995-06-07
申请号：EP94870183.4
申请日：1994-11-22
申请人： BAKER HUGHES INCORPORATED
发明人： Lund, Jeffrey B. , Smith, Redd H.
IPC分类号： E21B10/56 , B23B27/14 , B24B3/60 , B24B37/00
CPC分类号： E21B10/567 , B23B27/145 , B23B2226/315 , B24B1/00 , B24B53/02 , E21B10/5673 , E21B2010/566 , Y10T407/27
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 µ in.) or less and preferably 12,7 nm (0,5 µ in.) or less.
摘要翻译：具有抛光的，低摩擦的基本平面的切割面（40）的超硬切割元件（10'），其表面光洁度粗糙度为254nm（10μin。）或更小，优选为12,7nm（0.5μ））或更少。

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