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1. 发明授权

US5119892A Notary drill bits 失效
标题翻译：名义钻头
公开(公告)号：US5119892A
公开(公告)日：1992-06-09
申请号：US616635
申请日：1990-11-21
申请人： John M. Clegg , Malcolm R. Taylor , Leslie R. Hawke
发明人： John M. Clegg , Malcolm R. Taylor , Leslie R. Hawke
IPC分类号： E21B10/42 , E21B10/43 , E21B10/54 , E21B10/55
CPC分类号： E21B10/43 , E21B10/55
摘要： A rotary drill bit comprises a bit body having a shank for connection to a drill string and a passage for supplying drilling fluid to the face of the bit, which carries a plurality of polycrystalline diamond preform cutting elements. The cutting elements on one side of a diameter of the bit have positive side rake and the cutting elements on the other side of the diameter have negative side rake so that the vectorial sum of the reaction forces between the formation being drilled and the cutting elements provides a resultant lateral imbalance force acting on the bit body as it rotates in use. The gauge of the bit body includes low friction bearing pads so located as to transmit the resultant lateral force to the sides of the borehole. Since the bearing pads are of low friction, they slide around the surface of the formation and any tendency for bit whirl to be initiated is reduced. The lateral imbalance force may also be provided by varying the back rake of the cutting elements on different parts of the bit, or by including an asymmetrical mass of material in the bit body.

2. 发明授权

US5671818A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5671818A
公开(公告)日：1997-09-30
申请号：US541774
申请日：1995-10-10
申请人： Alex Newton , Malcolm R. Taylor , Andrew Murdock , John M. Clegg
发明人： Alex Newton , Malcolm R. Taylor , Andrew Murdock , John M. Clegg
IPC分类号： E21B10/00 , E21B10/54 , E21B10/55 , E21B10/56 , E21B10/567 , E21B10/60 , E21B17/10
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 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 leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles 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, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet 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 which, in use bears against the wall of the bore hole and extends across the width of the channel.
摘要翻译：用于在地下地层中钻孔的旋转钻头包括具有前表面和表面区域的钻头体，形成在钻头的前表面上并且向外远离钻头的轴线延伸的多个刀片，以便在叶片之间限定通向仪表区域的许多流体通道，沿着每个叶片并排安装的多个切割元件，以及钻头体中的多个喷嘴，用于将钻井流体供应到用于清洁的流体通道和冷却切割元件。在靠近仪表区域的至少一个流体通道中，是通向内部通过钻头体的封闭通道的开口，该出口在使用中与钻柱和钻孔壁之间的环形空间连通正在钻测量区域在开口外部的部分包括支承表面，其在使用中抵靠钻孔的壁并且延伸穿过通道的宽度。

3. 发明授权

US5163524A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5163524A
公开(公告)日：1992-11-17
申请号：US785543
申请日：1991-10-31
申请人： Thomas A. Newton, Jr. , John M. Clegg
发明人： Thomas A. Newton, Jr. , John M. Clegg
IPC分类号： E21B10/56 , E21B10/567 , E21B17/10
CPC分类号： E21B10/567 , E21B17/1092
摘要： A rotary drill bit comprises a bit body carrying a plurality of preform cutting elements, and a plurality of circumferentially spaced gauge pads which, in use, engage the surrounding formation. Some of the gauge pads carry cutting elements and others are free of cutting elements. To reduce cost, each gauge pad which is free of cutting elements has an outer bearing surface which is more abrasion resistant than the outer surfaces of the gauge pads which carry cutting elements.
摘要翻译：旋转钻头包括承载多个预成型件切割元件的钻头体和在使用中与周围地层接合的多个周向间隔的量规垫。一些测量垫带有切割元件，而其他的没有切割元件。为了降低成本，每个没有切割元件的规格垫具有比承载切割元件的规格垫的外表面更耐磨的外部支承表面。

4. 发明授权

US5803185A Steerable rotary drilling systems and method of operating such systems 失效
标题翻译：可操纵的旋转钻井系统及其操作方法
公开(公告)号：US5803185A
公开(公告)日：1998-09-08
申请号：US604318
申请日：1996-02-21
申请人： John D. Barr , John M. Clegg , William C. Motion
发明人： John D. Barr , John M. Clegg , William C. Motion
IPC分类号： E21B7/06 , E21B7/08 , E21B21/10 , E21B47/18 , E21B47/024
CPC分类号： E21B7/06 , E21B21/10 , E21B47/18 , E21B47/185
摘要： A steerable rotary drilling system has a bottom hole assembly which includes, in addition to the drill bit, a modulated bias unit and a control unit, the bias unit comprising a number of hydraulic actuators around the periphery of the unit, each having a movable thrust member which is hydraulically displaceable outwardly for engagement with the formation of the borehole being drilled. Each actuator may be connected, through a control valve, to a source of drilling fluid under pressure and the operation of the valve is controlled by the control unit so as to modulate the fluid pressure supplied to the actuators as the bias unit rotates. If the control valve is operated in synchronism with rotation of the bias unit the thrust members impart a lateral bias to the bias unit, and hence to the drill bit, to control the direction of drilling. Pulses transmitted through the drilling fluid as a result of operation of the bias unit are detected and interpreted at the surface, or at a different location downhole, to obtain information regarding the operation of the bias unit or other parts of the bottom hole assembly. Data signals from downhole sensors may be arranged to modify the control and operation of the bias unit in such manner that the data is encoded as pulses generated in the drilling fluid by the bias unit.
摘要翻译：可操纵的旋转钻井系统具有底孔组件，除了钻头之外，还包括调制偏压单元和控制单元，偏置单元包括围绕单元周边的多个液压致动器，每个液压致动器具有可移动的推力构件，其可液压地向外移位，用于与正在钻孔的钻孔的形成接合。每个致动器可以通过控制阀连接到压力下的钻井流体源，并且阀的操作由控制单元控制，以便在偏压单元旋转时调节供应到致动器的流体压力。如果控制阀与偏置单元的旋转同步地操作，则推力构件向偏置单元施加横向偏压，并因此向钻头施加横向偏压，以控制钻孔的方向。作为偏置单元的操作的结果，通过钻井液传输的脉冲在表面或井下的不同位置处被检测和解释，以获得关于偏置单元或底孔组件的其它部分的操作的信息。来自井下传感器的数据信号可以被布置成以这样的方式修改偏置单元的控制和操作，使得数据被编码为由偏置单元在钻井流体中产生的脉冲。

5. 发明授权

US5186268A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5186268A
公开(公告)日：1993-02-16
申请号：US785460
申请日：1991-10-31
申请人： John M. Clegg
发明人： John M. Clegg
IPC分类号： E21B10/42 , E21B10/43 , E21B17/10
CPC分类号： E21B10/43 , E21B17/1092
摘要： A rotary drill bit comprises a bit body carrying a plurality of primary preform cutting elements defining a primary cutting profile. The bit includes means to apply a lateral imbalance force to the bit as it rotates, and a portion of the outer periphery of the bit body includes a low friction bearing surface so located as to transmit the lateral force to the formation. There are associated with some of the primary cutting elements respective secondary elements spaced inwardly of the cutting profile defined by the primary cutting elements, but the portion of the periphery of the bit body where the bearing surface is located is substantially free of such secondary elements. The arrangement enhances the anti-whirl characteristics of the bit.
摘要翻译：旋转钻头包括承载限定初级切割轮廓的多个初级预成型件切割元件的钻头体。该钻头包括在钻头旋转时向钻头施加侧向不平衡力的装置，并且钻头体的外周的一部分包括低摩擦承载表面，以将横向力传递到地层。与主要切割元件相关联的一些主要切割元件相应的次要元件与由主切割元件限定的切割轮廓向内间隔开，但是钻头体的周边部分中的支承表面位于的部分基本上没有这样的次要元件。该装置增强了钻头的抗旋转特性。

6. 发明授权

US6089336A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US6089336A
公开(公告)日：2000-07-18
申请号：US834439
申请日：1997-04-16
申请人： Alex Nexton , Michael Tomczak , Steven Taylor , Andrew Murdock , John M. Clegg
发明人： Alex Nexton , Michael Tomczak , Steven Taylor , Andrew Murdock , John M. Clegg
IPC分类号： E21B10/00 , E21B10/26 , E21B10/54 , E21B10/55 , E21B10/60 , E21B17/10
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , 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 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 leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In each of the fluid channels, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The gauge region of the drill bit comprises a substantially continuous bearing surface which extends around the whole of the gauge region.
摘要翻译：用于在地下地层中钻孔的旋转钻头包括具有前表面和表面区域的钻头体，形成在钻头的前表面上并且向外远离钻头的轴线延伸的多个刀片，以便在叶片之间限定通向仪表区域的许多流体通道，沿着每个叶片并排安装的多个切割元件，以及钻头体中的多个喷嘴，用于将钻井流体供应到用于清洁的流体通道和冷却切割元件。在每个流体通道中，邻近测量区域，是通向内部通过钻头体的封闭通道的开口，该出口在使用中与钻柱和钻孔壁之间的环空相连通。钻头的测量区域包括围绕整个测量区域延伸的基本上连续的支承表面。

7. 发明授权

US5685379A Method of operating a steerable rotary drilling system 失效
标题翻译：操纵可转向旋转钻井系统的方法
公开(公告)号：US5685379A
公开(公告)日：1997-11-11
申请号：US604317
申请日：1996-02-21
申请人： John D. Barr , John M. Clegg , William C. Motion
发明人： John D. Barr , John M. Clegg , William C. Motion
IPC分类号： E21B7/06
CPC分类号： E21B7/06 , E21B7/068
摘要： A steerable rotary drilling system comprises a bottom hole assembly which includes, in addition to a drill bit, a modulated bias unit and a control unit including an instrument carrier which is rotatable relative to the bias unit. The bias unit comprises a number of hydraulic actuators spaced apart around the periphery of the unit, each having a movable thrust member which is displaceable outwardly for engagement with the formation. Each actuator can be connected, through a rotatable control valve, to a source of drilling fluid under pressure, the control valve comprising a first part, rotatable with the instrument carrier, which cooperates with a second part which is rotatable with the bias unit. Means are provided to roll stabilize the instrument carrier so that relative rotation between the bias unit and instrument carrier, as the bias unit rotates, causes the valve to operate the actuators in synchronism with rotation of the bias unit so as to apply a lateral bias thereto. In order to neutralize or reduce the net bias applied to the bias unit the instrument carrier may be rotated in various modes instead of being roll stabilized, e.g., it may be rotated at a constant slow speed relative to the bias unit, or at a significantly faster rate so that the actuators do not have time to operate fully. The angular velocity of the carrier may also be varied during its rotation, according to various formulae, in order to vary the net bias. The net bias may also be varied by alternating different modes of carrier rotation.
摘要翻译：可操纵的旋转钻井系统包括底孔组件，除了钻头之外，还包括调制偏压单元和包括可相对于偏压单元旋转的仪器载体的控制单元的钻孔组件。偏置单元包括围绕单元的周边间隔开的多个液压致动器，每个液压致动器具有可向外移动以与地层接合的可移动推力构件。每个致动器可以通过可旋转的控制阀连接到压力下的钻井液源，该控制阀包括可与仪器载体一起旋转的第一部件，该第一部件与可与偏置单元一起旋转的第二部件协作。提供了用于滚动稳定仪器载体的装置，使得当偏压单元旋转时偏置单元和仪器载体之间的相对旋转使得阀与偏置单元的旋转同步地操作致动器，从而向其施加横向偏压。为了中和或减少施加到偏置单元的净偏压，仪器载体可以以各种模式旋转而不是辊稳定，例如，其可以相对于偏置单元以恒定的慢速度旋转，或者在显着地更快的速率，使执行器没有时间完全运行。根据各种公式，载体的角速度也可以在其旋转期间改变，以便改变净偏压。净偏置也可以通过交替的不同载体旋转模式来改变。

8. 发明授权

US06089332A Steerable rotary drilling systems 失效
标题翻译：可转向旋转钻井系统
公开(公告)号：US06089332A
公开(公告)日：2000-07-18
申请号：US4592
申请日：1998-01-08
申请人： John D. Barr , John M. Clegg , William C. Motion
发明人： John D. Barr , John M. Clegg , William C. Motion
IPC分类号： E21B7/06 , E21B7/08 , E21B21/10 , E21B47/18 , E21B47/024
CPC分类号： E21B7/06 , E21B21/10 , E21B47/18 , E21B47/185
摘要： A steerable rotary drilling system has a bottom hole assembly which includes, in addition to the drill bit, a modulated bias unit and a control unit, the bias unit comprising a number of hydraulic actuators around the periphery of the unit, each having a movable thrust member which is hydraulically displaceable outwardly for engagement with the formation of the borehole being drilled. Each actuator may be connected, through a control valve, to a source of drilling fluid under pressure and the operation of the valve is controlled by the control unit so as to modulate the fluid pressure supplied to the actuators as the bias unit rotates. If the control valve is operated in synchronism with rotation of the bias unit the thrust members impart a lateral bias to the bias unit, and hence to the drill bit, to control the direction of drilling. Pulses transmitted through the drilling fluid as a result of operation of the bias unit are detected and interpreted at the surface, or at a different location downhole, to obtain information regarding the operation of the bias unit or other parts of the bottom hole assembly. Data signals from downhole sensors may be arranged to modify the control and operation of the bias unit in such manner that the data is encoded as pulses generated in the drilling fluid by the bias unit.
摘要翻译：可操纵的旋转钻井系统具有底孔组件，除了钻头之外，还包括调制偏压单元和控制单元，偏置单元包括围绕单元周边的多个液压致动器，每个液压致动器具有可移动的推力构件，其可液压地向外移位，用于与正在钻孔的钻孔的形成接合。每个致动器可以通过控制阀连接到压力下的钻井流体源，并且阀的操作由控制单元控制，以便在偏压单元旋转时调节供应到致动器的流体压力。如果控制阀与偏置单元的旋转同步地操作，则推力构件向偏置单元施加横向偏压，并因此向钻头施加横向偏压，以控制钻孔的方向。作为偏置单元的操作的结果，通过钻井液传输的脉冲在表面或井下的不同位置处被检测和解释，以获得关于偏置单元或底孔组件的其它部分的操作的信息。来自井下传感器的数据信号可以被布置成以这样的方式修改偏置单元的控制和操作，使得数据被编码为由偏置单元在钻井流体中产生的脉冲。

9. 发明授权

US5819860A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5819860A
公开(公告)日：1998-10-13
申请号：US834440
申请日：1997-04-16
申请人： Alex Newton , Steven Taylor , Andrew Murdock , John M. Clegg
发明人： Alex Newton , Steven Taylor , Andrew Murdock , John M. Clegg
IPC分类号： E21B10/00 , E21B10/54 , E21B10/55 , E21B10/56 , E21B10/567 , E21B10/60 , E21B17/10
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 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 leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles 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, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet 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 which, in use bears against the wall of the bore hole and extends across the width of the channel.
摘要翻译：用于在地下地层中钻孔的旋转钻头包括具有前表面和表面区域的钻头体，形成在钻头的前表面上并且向外远离钻头的轴线延伸的多个刀片，以便在叶片之间限定通向仪表区域的许多流体通道，沿着每个叶片并排安装的多个切割元件，以及钻头体中的多个喷嘴，用于将钻井流体供应到用于清洁的流体通道和冷却切割元件。在靠近仪表区域的至少一个流体通道中，是通向内部通过钻头体的封闭通道的开口，该出口在使用中与钻柱和钻孔壁之间的环形空间连通正在钻测量区域在开口外部的部分包括支承表面，其在使用中抵靠钻孔的壁并且延伸穿过通道的宽度。

10. 发明授权

US5244039A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5244039A
公开(公告)日：1993-09-14
申请号：US786035
申请日：1991-10-31
申请人： Thomas A. Newton, Jr. , John M. Clegg
发明人： Thomas A. Newton, Jr. , John M. Clegg
IPC分类号： E21B10/42 , E21B10/43 , E21B10/56 , E21B10/567 , E21B10/60
CPC分类号： E21B10/43 , E21B10/567 , E21B10/602
摘要： A rotary drill bit for drilling holes in subsurface formations comprises a bit body having a shank for connection to a drill string, a plurality of preform primary cutting elements mounted on the bit body and defining a primary cutting profile having a downwardly convex nose portion. There are associated with at least certain of the primary cutting elements respective secondary elements which are spaced inwardly of the primary profile. The distance of the secondary elements from the primary profile, when measured in a direction perpendicular to said profile, is generally greater for secondary elements nearer the nose portion than it is for secondary elements further away from the nose portion, and is preferably such that the vertical distance of the secondary elements from the profile is substantially constant.
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，安装在钻头体上并限定具有向下凸出的鼻部的主切割轮廓的多个预成型主切割元件。至少有一些主要切割元件与主要轮廓向内间隔的相应次要元件相关联。当沿垂直于所述轮廓的方向测量时，次要元件与初级轮廓的距离对于比鼻部更靠近鼻部的次要元件大体上比对于远离鼻部的次要元件更大，并且优选地使得次要元件与轮廓的垂直距离基本上是恒定的。

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