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21.发明公开ASYMMETRIC GRADED COMPOSITES FOR IMPROVED DRILL BITS 审中-公开不对称的平台VerbundwerkstoffefürverbesserteBohrmeißel
公开(公告)号：EP2011893A2
公开(公告)日：2009-01-07
申请号：EP08167176.0
申请日：2006-06-30
CPC分类号： E21B10/56 , C23C30/005
摘要： A cutting tool that includes at least one tungsten carbide cutting element disposed on a support, wherein at least one tungsten carbide cutting element has at least one localized region having a material property different from the remaining region, wherein the at least one localized region having a different material property is prepared by a method including determining at least one localized region needing a variation in a material property different from the remaining region; coating a portion of a surface of the at least one tungsten carbide cutting element with a refractory material such that a surface corresponding to the localized region is left uncoated; and treating the coated cutting element with a selected agent to diffuse the selected agent into the localized region is disclosed.
摘要翻译： 一种切削工具（26），其包括设置在支撑件上的至少一个碳化钨切割元件（28），其中至少一个碳化钨切割元件具有至少一个局部区域（74,76,78），其具有不同于 其中所述至少一个具有不同材料性质的局部区域通过包括确定至少一个局部区域的方法来制备，所述局部区域需要与其余区域不同的材料性质的变化; 用耐火材料涂覆所述至少一个碳化钨切割元件的表面的一部分，使得对应于所述局部区域的表面不被涂覆; 并且公开了用所选择的试剂处理涂覆的切割元件以将所选择的试剂扩散到局部区域中。
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公开(公告)号：EP1988252A2
公开(公告)日：2008-11-05
申请号：EP08155183.0
申请日：2008-04-25
摘要： A locking clutch (200) to selectively transmit torque from a stator (204) of a downhole tool to a rotor (202) of the downhole tool (201) includes at least one locking pawl (208) disposed upon the rotor (202), wherein the at least one locking pawl comprises a load path, a pivot axis, and a mass center, wherein the at least one locking pawl (208) is biased into an engaged position by a biasing mechanism (214), wherein the at least one locking pawl (208) transmits force from the stator (204) to the rotor (202) along the load path when in the engaged position, and wherein centrifugal force urges the at least one locking pawl (208) into a disengaged position when the rotor (202) is rotated above a disengagement speed.
摘要翻译： 选择性地将扭矩从井下工具的定子（204）传递到井下工具（201）的转子（202）的锁定离合器（200）包括设置在转子（202）上的至少一个锁定爪（208） 其中所述至少一个锁定爪包括负载路径，枢转轴线和质量中心，其中所述至少一个锁定爪（208）通过偏置机构（214）被偏压到接合位置，其中所述至少一个 当处于接合位置时，锁定爪（208）沿着负载路径将力从定子（204）传递到转子（202），并且其中离心力在至少一个锁定爪（208）转动时将该至少一个锁定爪（208）推入分离位置 （202）旋转高于分离速度。
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公开(公告)号：EP1944461A2
公开(公告)日：2008-07-16
申请号：EP07120761.7
申请日：2007-11-15
摘要： A drill bit that includes a matrix bit body having a reinforcing overlay thereon and 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; and a braze material disposed between the at least one cutter and the at least one cutter pocket, wherein the reinforcing overlay comprises carbide particles and at least one binder and has a melting point greater than a melting point of the braze material is disclosed.
摘要翻译： 一种钻头，其包括其上具有加强覆盖物并且在其上具有至少一个刀片的矩阵钻头体; 设置在所述至少一个叶片上的至少一个切割器袋; 至少一个切割器设置在所述至少一个切割器凹槽中; 以及设置在所述至少一个切割器和所述至少一个切割器凹穴之间的钎焊材料，其中所述增强覆盖物包含碳化物颗粒和至少一个粘合剂并且具有大于所述钎焊材料的熔点的熔点。
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公开(公告)号：EP1402147B1
公开(公告)日：2007-09-05
申请号：EP02738406.4
申请日：2002-06-27
CPC分类号： E21B23/006 , E21B21/103
摘要： The present invention relates to downhole apparatus and particularly but not exclusively, to multi-cycle circulating subs used during downhole drilling operations. Apparatus is provided comprising a piston (42) slidably mounted in a body (4) between positions in which at least one aperture (40) in the body is opened and closed. Movement of the piston (42) is controlled by a pin (86) secured to one of the body and a control member, and a control groove (52) in which a portion of the pin is received formed in the other of the body and control member. An arrangement of elements (32, 76) respectively connected to the control member and body is such that, as the control member moves axially, increasing lengths of said elements locate adjacent one another so as to provide resistance to relative rotation in at least one direction of the control member and body. The relative rotation is rotation which presses the control member against the control groove. The present invention thereby provides means by which the risk of damage to the control pin is reduced.
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公开(公告)号：EP1796865A2
公开(公告)日：2007-06-20
申请号：EP05819226.1
申请日：2005-10-05
IPC分类号： B23K20/12
CPC分类号： B23K37/0426 , B23K20/126 , B23K37/0531 , B23K2201/06
摘要： A mandrel (72) that provides a counter-force to the pressure exerted on the outside of a pipe (90) or other arcuate surface by a friction stir welding tool, wherein the mandrel (72) is expandable through the use of a wedge (82), and wherein the mandrel (72) enables multiple friction stir welding heads to simultaneously perform welding on the arcuate surface.
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公开(公告)号：EP1174584B1
公开(公告)日：2006-03-01
申请号：EP01117366.3
申请日：2001-07-18
发明人： Truax, David , Beaton, Timothy Paul
CPC分类号： E21B17/1092 , E21B10/26 , E21B10/46
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公开(公告)号：EP1412607B1
公开(公告)日：2005-12-28
申请号：EP02749084.6
申请日：2002-07-30
IPC分类号： E21B4/02
摘要： The present invention relates to downhole apparatus for limiting rotation of a rotor (4) relative to a stator (8) associated with said rotor (4). Apparatus according to the invention is provided with a locking member (12) movable from a first axial position to a second axial position by the application of a static fluid pressure to a differential area of said locking member (12). The apparatus is characterised by means for selectively applying static fluid pressure to said differential area of said locking member (12).
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公开(公告)号：EP1606074A2
公开(公告)日：2005-12-21
申请号：EP04707105.5
申请日：2004-01-30
IPC分类号： B23K20/12
CPC分类号： B23K20/126 , B23K20/1235 , B23K20/1255 , B23K20/227 , B23K37/0531 , B23K37/06 , B23K2201/06 , B23K2203/05
摘要： A system and method for performing friction stir welding of non-planar materials having high melting temperatures, wherein a process is provided for performing longitudinal and radial welds on objects such as pipes (23 and 26), flanges, tanks, and shrouds, and wherein an active or passive mandrel (21) provides support for the friction stir welding process.
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公开(公告)号：EP1340737B1
公开(公告)日：2005-10-12
申请号：EP03251153.7
申请日：2003-02-26
发明人： Middlemiss, Stewart
CPC分类号： B22F7/06 , B22F2005/001 , C04B35/52 , C04B2235/40 , C04B2235/402 , C04B2235/404 , C04B2235/405 , C04B2235/421 , C04B2235/427 , C04B2235/96 , C23C24/08 , C23C30/005
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公开(公告)号：EP1567746A1
公开(公告)日：2005-08-31
申请号：EP03767952.9
申请日：2003-12-02
IPC分类号： E21B41/00
CPC分类号： E21B41/0042 , E21B41/0035
摘要： The present invention relates to a downhole tool (102) for selectively opening and closing a lateral borehole extending from a primary borehole. The tool (102) comprises a body (104) incorporating a wall provided with an opening (116) extending therethrough; a deflector member (106) slidably mounted in the body (104) and having a deflecting surface (126) for deflecting, in use, downhole equipment laterally within the body (104). The deflector member (106) is slidable between an open position, in which the deflecting surface is located adjacent and facing towards said opening so that, in use, downhole equipment laterally deflected by the deflecting surface is directed through said opening, and a closed position, in which the deflecting surface is oriented relative to said opening so as to prevent downhole equipment from being laterally deflected through said opening during use. In either position, equipment may pass into the primary borehole downhole of the primary/lateral junction. The tool (102) also comprises constraining means (138, 140) for restricting movement of the whipstock relative to the body.
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