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11. 发明公开

EP0790386A3 Improvements in or relating to rotary drill bits 失效
标题翻译：改进钻头
公开(公告)号：EP0790386A3
公开(公告)日：1998-03-25
申请号：EP97300920.2
申请日：1997-02-13
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Newton, Alex , Murdock, Andrew , Deane, John , Barnes, Michael , Caraway, Douglas , Lamb, Haydn
IPC分类号： E21B10/52
CPC分类号： E21B10/52
摘要： A rotary drill bit, for drilling holes in subsurface formations, comprises a bit body (10), cutting structures (14) mounted on the bit body, and a fluid supply system for supplying drilling fluid to the surface of the bit body, to cool and clean the cutting structures. The fluid supply system comprises a number of nozzles (17) mounted in the bit body, a main passage (20) in the bit body and a number of auxiliary passages (21) leading from the main passage to the nozzles. Some or all of the passages (20, 21) are at least partly lined with an erosion-resistant lining material (23). The lining material may comprise a hard facing applied to the internal surface of a preformed passage or a rigid tube which itself defines the internal surface of the passage.

12. 发明公开

EP0707132A3 Rotary drill bit 失效
标题翻译：旋转钻头
公开(公告)号：EP0707132A3
公开(公告)日：1997-04-09
申请号：EP95306937.4
申请日：1995-09-29
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Newton, Alex , Taylor, Steven , Murdock, Andrew , Clegg, John M.
IPC分类号： E21B10/60 , E21B10/56
CPC分类号： E21B10/567 , E21B10/00 , E21B10/55 , E21B10/60 , E21B10/602 , E21B17/1064 , E21B17/1092
摘要： A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades (12,14,16,18,20,22,24,26,28) formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid channels (30,32,34,36,38,40,42,44,46) leading towards the gauge region, a number of cutting elements (48) mounted side-by-side along each blade, and a number of nozzles (50,52,54,56,58,60) in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In at least one of the fluid channels (30), adjacent the gauge region, is an opening (96) into an enclosed passage (98) which passes internally through the bit body to an outlet (100) which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The portion of the gauge region outwardly of the opening comprises a bearing surface (102) which, in use bears against the wall of the bore hole and extends across the width of the channel (30).

13. 发明公开

EP0738823A2 Improvements in or relating to elements faced with superhard material 失效
标题翻译： Schneidelement mit einerOberflächeaus superhartem Werkstoff
公开(公告)号：EP0738823A2
公开(公告)日：1996-10-23
申请号：EP96302709.9
申请日：1996-04-18
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Matthias, Terry R. , Newton, Alex
IPC分类号： E21B10/56
CPC分类号： E21B10/5735
摘要： A preform element, such as a cutting element for a rotary drag-type drill bit, includes a facing table (20) of superhard material having a front face (23), a peripheral surface(29), and a rear surface (27) bonded to a substrate (21) which is less hard than the superhard material. The rear surface (27) of the facing table is integrally formed with a plurality of ribs (25, 26) which project into the substrate (21), and at least major portions of the ribs extend across the rear surface of the facing table in directions which are generally radial with respect to at least one point (28) which is adjacent or outside the peripheral surface (29) of the facing table.
摘要翻译：预型件元件，例如用于旋转式钻头的切割元件，包括具有前表面（23），外周表面（29）和后表面（27）的超硬材料的对置台（20）粘合到比超硬材料硬的基板（21）上。面对台的后表面（27）与突出到基板（21）中的多个肋（25,26）整体形成，并且肋的至少主要部分延伸穿过对置台的后表面大致径向相对于面对桌的周边表面（29）的邻近或外侧的至少一个点（28）的方向。

14. 发明公开

EP0688937A1 Improvements in or relating to elements faced with superhard material 失效
标题翻译：与超硬材料相关的元件的改进
公开(公告)号：EP0688937A1
公开(公告)日：1995-12-27
申请号：EP95304148.0
申请日：1995-06-15
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Newton, Alex
IPC分类号： E21B10/56
CPC分类号： E21B10/5735
摘要： A preform element includes a facing table (21') of superhard material having a front face, an outer peripheral surface, and a rear surface bonded to a substrate (25') which is less hard than the superhard material. The facing table comprising a peripheral region (23)' surrounding an inner region (22)', the peripheral region having an inner surface (30) which is inclined at an angle of greater than 90° to the rear surface (31) of the facing table so as to face in a direction having a component rearwardly away from the facing table as well as inwardly towards said inner region (22'). The inner region of the facing table may be formed with projections (24') extending into the substrate.
摘要翻译：一种预成型件元件包括具有前表面，外周表面和粘合到基底（25'）的后表面的超硬材料的面对台（21'），该基底比超硬材料硬度小。所述面对台包括围绕内部区域（22）的周边区域（23），所述周边区域具有内表面（30），所述内表面（30）以大于90°的角度倾斜于所述内表面以便朝向具有向后远离所述面对台的部件以及向内朝向所述内部区域（22'）的方向。面对台的内部区域可以形成有延伸到衬底中的突起（24'）。

15. 发明公开

EP0546725A1 Improvents in or relating to cutting elements for rotary drill bits 失效
标题翻译：施耐德森（SchneideinsätzefürBohrkronen）。
公开(公告)号：EP0546725A1
公开(公告)日：1993-06-16
申请号：EP92310836.9
申请日：1992-11-26
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Hollister, Kelly , Newton, Alex , Griffin, Nigel Dennis , Taylor, Malcolm Roy , Matthias, Terry Richard
IPC分类号： E21B10/56
CPC分类号： E21B10/5676 , E21B10/52
摘要： A preform cutting element for a rotary drill bit includes a cutting table (18) of polycrystalline diamond material having a front cutting face, a peripheral surface, and a rear face bonded to a substrate of cemented tungsten carbide. The cutting table includes an outer peripheral portion (20), defining at least a part of the peripheral surface, which is formed of a first form of diamond, for example of larger grain size, which is of greater impact resistance than a second form of diamond forming other portions (19) of the cutting table. This protects the cutting edge of the cutting element against impact damage in use, particularly before a significant wear flat has formed.
摘要翻译：用于旋转钻头的预成型件切割元件包括多晶金刚石材料切割台（18），该切割台具有前切割面，外周表面和与粘合碳化钨的基底结合的后表面。切割台包括外周部分（20），其限定周边表面的至少一部分，其由例如具有较大晶粒尺寸的第一形式的金刚石形成，其具有比第二形式的第二形式的更大的抗冲击性金刚石形成切割台的其他部分（19）。这保护切割元件的切割边缘免受使用中的冲击损坏，特别是在形成显着的磨损平面之前。

16. 发明授权

EP0738823B1 Improvements in or relating to elements faced with superhard material 失效
标题翻译：具有超硬材料的表面面积的切割元件
公开(公告)号：EP0738823B1
公开(公告)日：2002-07-17
申请号：EP96302709.9
申请日：1996-04-18
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Matthias, Terry R. , Newton, Alex
IPC分类号： E21B10/56 , F16C33/04 , B05B1/00 , B21C3/02 , F16H53/06 , B23B27/14
CPC分类号： E21B10/5735

17. 发明授权

EP0710765B1 Improvements relating to rotary drill bits 失效
标题翻译：改进旋转钻头
公开(公告)号：EP0710765B1
公开(公告)日：2001-02-21
申请号：EP95306938.2
申请日：1995-09-29
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Newton, Alex , Taylor, Malcolm R. , Fuller, John M. , Murdock, Andy
IPC分类号： E21B10/54 , E21B10/56
CPC分类号： E21B10/43 , E21B10/55 , E21B10/602

18. 发明授权

EP0733777B1 Cutting insert for rotary drag drill bit 失效
标题翻译：用于旋转钻进齿切削刀片
公开(公告)号：EP0733777B1
公开(公告)日：2000-08-23
申请号：EP96301962.5
申请日：1996-03-21
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Matthias, Terry R. , Newton, Alex , Sarik, Daniel J.
IPC分类号： E21B10/56
CPC分类号： E21B10/5735

19. 发明公开

EP0710765A3 Improvements relating to rotary drill bits 失效
标题翻译：改进旋转钻头
公开(公告)号：EP0710765A3
公开(公告)日：1996-12-27
申请号：EP95306938.2
申请日：1995-09-29
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Newton, Alex , Taylor, Malcolm R. , Fuller, John M. , Murdock, Andy
IPC分类号： E21B10/54
CPC分类号： E21B10/43 , E21B10/55 , E21B10/602
摘要： A rotary drill bit for drilling holes in subsurface formations comprises a bit body (10) having a shank for connection to a drill string, a number of circumferentially spaced blades (11,12) on the bit body each extending outwardly away from the central axis of rotation of the bit, a number of cutters (14,15) mounted side-by-side along each blade, and a passage (16) in the bit body for supplying drilling fluid to the surface of the bit for cleaning and cooling the cutters. The blades comprise alternating primary and secondary blades. The cutters (14) on the primary blades (11) are primary cutters which are located at different radial distances from the bit axis so as to define a cutting profile which, in use, covers substantially the whole of the bottom of the bore hole being drilled. At least the majority of the cutters (15) on the secondary blades (12) are secondary cutters each of which is located at substantially the same radial distance from the bit axis as an associated primary cutter (14) on the preceding primary blade (11).

20. 发明公开

EP0742342A2 Rotary drill bit 失效
标题翻译： Drehbohrmeissel
公开(公告)号：EP0742342A2
公开(公告)日：1996-11-13
申请号：EP96302932.7
申请日：1996-04-26
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Caraway, Douglas , Watson, Graham , Newton, Alex
IPC分类号： E21B10/60
CPC分类号： E21B10/55 , E21B10/602
摘要： A rotary drill bit for drilling holes in subsurface formations comprises a bit body (10) having a leading face and a gauge region, and a plurality of blades (12) formed on the leading face of the bit body and extending outwardly away from the axis of the bit towards the gauge region so as to define a fluid flow channel (14) between the leading edge of each blade and the trailing edge of the adjacent preceding blade. A plurality of cutting elements (18) are mounted along the leading edge of each blade, and there is provided, in one or more of the channels, a main nozzle (20) which directs fluid along the leading edge of one blade so as to clean and cool the cutting elements on it, and a subsidiary nozzle (22) which is located and orientated so as to direct fluid along the trailing edge of the preceding blade in a direction opposite to the direction of flow from the main nozzle, so as to tend to enhance partial recirculation of fluid flow in the flow channel between the blades.
摘要翻译：用于在地下构造中钻孔的旋转钻头包括具有前表面和表面区域的钻头体（10）和形成在钻头体的前表面上并从轴线向外延伸的多个叶片（12）以限定在每个叶片的前缘和相邻的前一叶片的后缘之间的流体流动通道（14）。沿着每个叶片的前缘安装有多个切割元件（18），并且在一个或多个通道中设置有主喷嘴（20），主喷嘴（20）沿着一个叶片的前缘引导流体，以便清洁和冷却其上的切割元件，以及辅助喷嘴（22），其定位和定向以沿着与主喷嘴的流动方向相反的方向沿着前一叶片的后缘引导流体，以便倾向于增强叶片之间的流动通道中的流体流的部分再循环。

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