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1. 发明公开

EP0738823A3 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：EP0738823A3
公开(公告)日：1997-11-05
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.

2. 发明公开

EP0790386A2 Improvements in or relating to rotary drill bits 失效
标题翻译： Verbesserungen一个Bohrmeisseln
公开(公告)号：EP0790386A2
公开(公告)日：1997-08-20
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.
摘要翻译：用于在地下构造中钻孔的旋转钻头包括钻头体（10），安装在钻头体上的切割结构（14）和用于向钻头体的表面提供钻井流体的流体供应系统以冷却并清洁切割结构。流体供给系统包括安装在钻头体中的多个喷嘴（17），钻头体中的主通道（20）和从主通道引导到喷嘴的多个辅助通道（21）。部分或全部通道（20,21）至少部分地衬有抗侵蚀衬里材料（23）。衬里材料可以包括施加到预成型通道的内表面的硬面或者其自身限定通道内表面的刚性管。

3. 发明授权

EP0546725B1 Improvents in or relating to cutting elements for rotary drill bits 失效
标题翻译：切割的钻头插入
公开(公告)号：EP0546725B1
公开(公告)日：1996-09-25
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

4. 发明公开

EP0710765A2 Improvements relating to rotary drill bits 失效
标题翻译： Verbesserungen一个Drehbohrmeissel
公开(公告)号：EP0710765A2
公开(公告)日：1996-05-08
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).
摘要翻译：用于在地下构造中钻孔的旋转钻头包括具有用于连接到钻柱的柄的钻头体（10），钻头体上的多个周向间隔开的叶片（11,12），每个叶片从中心轴线向外延伸钻头的旋转，沿着每个叶片并排安装的多个切割器（14,15）以及钻头体中的用于向钻头表面提供钻井液的通道（16），用于清洁和冷却钻头刀具。叶片包括交替的主叶片和次叶片。主叶片（11）上的切割器（14）是位于与钻头轴线不同的径向距离处的主切割器，以便限定切割轮廓，其在使用中基本上覆盖钻孔的整个底部的整个钻出。至少大多数次级叶片（12）上的切割器（15）是辅助切割器，每个切割器位于与钻头轴线基本相同的径向距离处，与在前一个主叶片（11）上的相关联的主切割器（14））。

5. 发明公开

EP0687797A1 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：EP0687797A1
公开(公告)日：1995-12-20
申请号：EP95304149.8
申请日：1995-06-15
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Fuller, John M. , Sarik, Daniel J. , Newton, Alex , Matthias, Terry R.
IPC分类号： E21B10/56
CPC分类号： E21B10/567 , B23B27/146 , B23B2222/28 , B23B2226/315 , E21B10/5735 , Y10T407/26 , Y10T407/27 , Y10T408/78
摘要： A preform element, which may be used as a cutter in a rotary drill bit, includes a facing table (42) of polycrystalline diamond bonded to a tungsten carbide substrate (41).The facing table (42) is of non-uniform thickness and comprises a region of greater thickness adjacent the cutting edge and extending towards the interior of the element. In one embodiment the region of greater thickness comprises a ridge of superhard material which extends into the substrate (41), or from the front face of the element, and is of substantially constant width as it extends away from the cutting edge. The provision of the ridge causes the cutting edge to wear in a pointed configuration in use.
摘要翻译：可用作旋转钻头中的切割器的预成形元件包括结合到碳化钨基底（41）的多晶金刚石的面对台（42）。面对台（42）具有不均匀的厚度并且包括邻近切削刃并且朝向元件内部延伸的更大厚度的区域。在一个实施例中，较大厚度的区域包括延伸到衬底（41）内或从元件的前表面延伸的超硬材料脊，并且当其远离切割边缘延伸时具有基本恒定的宽度。脊的设置导致切割刃在使用中以尖锐的构型磨损。

6. 发明授权

EP0707132B1 Rotary drill bit 失效
公开(公告)号：EP0707132B1
公开(公告)日：2003-08-06
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

7. 发明授权

EP0688937B1 Improvements in or relating to elements faced with superhard material 失效
标题翻译：改进或与其有关的，与超硬材料元件包
公开(公告)号：EP0688937B1
公开(公告)日：2002-12-18
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

8. 发明公开

EP0742342A3 Rotary drill bit 失效
标题翻译：旋转钻头
公开(公告)号：EP0742342A3
公开(公告)日：1997-11-12
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：用于在地下地层中钻孔的旋转钻头包括具有前导面和标准区域的钻头本体（10），以及形成在钻头本体的前导面上且远离轴线向外延伸的多个叶片（12）朝向规范区域移动，以便在每个叶片的前缘和相邻的前一个叶片的后缘之间限定流体流动通道（14）。多个切割元件（18）沿着每个叶片的前缘安装，并且在一个或多个通道中设置有主喷嘴（20），该主喷嘴沿着一个叶片的前缘引导流体以便清洁并冷却其上的切割元件;以及辅助喷嘴（22），该辅助喷嘴（22）定位并定向成沿着与来自主喷嘴的流动方向相反的方向沿前一个叶片的后缘引导流体，如倾向于增强叶片之间的流动通道中的流体流动的部分再循环。

9. 发明公开

EP0707132A2 Rotary drill bit 失效
标题翻译：旋转钻头
公开(公告)号：EP0707132A2
公开(公告)日：1996-04-17
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).
摘要翻译：一种用于在地下地层中钻孔的旋转钻头包括一个具有前导面和标准区域的钻头本体，多个形成于其上的叶片（12,14,16,18,20,22,24,26,28）所述钻头的前导面远离所述钻头的轴线向外延伸，以在所述叶片之间限定多个朝向所述钻头的流体通道（30,32,34,36,38,40,42,44,46）多个沿每个叶片并排安装的切割元件（48），以及钻头本体中的多个喷嘴（50,52,54,56,58,60），用于将钻井液供应到流体用于清洁和冷却切割元件的通道。在至少一个流体通道（30）中，与标准区域相邻的是进入封闭通道（98）的开口（96），封闭通道（98）内部穿过钻头体到达出口（100），该出口在使用中与钻柱与钻孔壁之间的环空正在钻孔。测量区域的在开口外部的部分包括支承表面（102），该支承表面在使用中抵靠在钻孔的壁上并延伸穿过通道（30）的宽度。

10. 发明授权

EP0707131B1 Rotary drill bit with rotatably mounted gauge section for bit stabilisation 失效
标题翻译：一种旋转钻头具有可旋转地附接到所述量规部Meisselstabilisierung
公开(公告)号：EP0707131B1
公开(公告)日：2002-12-11
申请号：EP95306939.0
申请日：1995-09-29
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Newton, Alex , Fuller, John M. , Murdock, Andrew , Sarik, Daniel J.
IPC分类号： E21B10/56 , E21B10/08 , E21B10/00 , E21B17/10
CPC分类号： E21B17/1092 , E21B10/00 , E21B10/602 , E21B17/1064

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