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1. 发明授权

US4873895A Manufacture of rotary drill bits 失效
标题翻译：旋转钻头的制造
公开(公告)号：US4873895A
公开(公告)日：1989-10-17
申请号：US265237
申请日：1988-10-31
申请人： Malcolm R. Taylor , John D. Barr , John R. Smart
发明人： Malcolm R. Taylor , John D. Barr , John R. Smart
IPC分类号： B23K31/02 , B23P11/00 , E21B10/56 , E21B10/567 , E21B10/62 , F16B11/00
CPC分类号： E21B10/567 , B23K31/025 , B23P11/00 , E21B10/62 , F16B11/006
摘要： There is provided a method of manufacturing a rotary drill bit of the kind including a plurality of cutting structures mounted in sockets in the bit body and projecting from the face of the bit. The method comprises providing a clearance between each cutting structure and its socket and filling the clearance with a settable liquid, the settable liquid being such as to solidify at a temperature less than 400.degree. C. and to retain its integrity, after solidification, at least up to a temperature of 180.degree. C. The solidified liquid acts as a gap filler and provides an interference fit between the cutting structure and the socket. Suitable gap filing settable liquids are: anaerobic adhesive, epoxy resin, dental amalgam, tin/lead solder and bismuth/antimony alloy.
摘要翻译：提供了一种制造这种类型的旋转钻头的方法，该旋转钻头包括安装在钻头体中的插座中并从钻头的表面突出的多个切割结构。该方法包括在每个切割结构和其插座之间提供间隙并用可固化液体填充间隙，可凝固液体在低于400℃的温度下固化并且在固化之后保持其完整性至少达到180℃的温度。凝固的液体充当间隙填料并且在切割结构和插座之间提供过盈配合。合适的间隙填充可固化液体是：厌氧胶，环氧树脂，牙科汞合金，锡/铅焊料和铋/锑合金。

2. 发明授权

US4733735A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US4733735A
公开(公告)日：1988-03-29
申请号：US913101
申请日：1986-09-29
申请人： John D. Barr , John M. Fuller , Malcolm R. Taylor
发明人： John D. Barr , John M. Fuller , Malcolm R. Taylor
IPC分类号： E21B10/26 , E21B10/56 , E21B10/567 , E21B10/60
CPC分类号： E21B10/567 , E21B10/26 , E21B10/602
摘要： A rotary drill bit comprises a bit body having a leading face and a gauge region, a number of blades on the leading face of the bit body, and a number of cutting elements mounted along each blade. A passage in the bit body supplies drilling fluid to nozzles in the leading face of the bit body for cooling and cleaning the cutting elements. Each nozzle is so oriented, and the surface of the bit body in the region in front of each blade is so shaped, as to promote a vortex flow of drilling fluid around said region, with part of the periphery of the vortex extending across the cutting elements on the blade, so that fluid in the periphery of the vortex passes across the cutting elements mounted on each blade before escaping through an exit channel in the gauge region.
摘要翻译：旋转钻头包括具有前表面和测量区域的钻头体，钻头体的前表面上的多个刀片以及沿着每个刀片安装的多个切割元件。钻头体中的通道为钻头体的前表面的喷嘴提供钻井液，用于冷却和清洁切割元件。每个喷嘴如此取向，并且钻头体在每个叶片前面的区域中的表面是如此成形的，以便促进围绕所述区域的钻井流体的涡流，涡旋的周边的一部分延伸穿过切割使得涡流周边中的流体穿过安装在每个叶片上的切割元件，然后通过测量区域中的出口通道逸出。

3. 发明授权

US4669556A Drill bit and cutter therefor 失效
标题翻译：钻头和刀具
公开(公告)号：US4669556A
公开(公告)日：1987-06-02
申请号：US693848
申请日：1985-01-25
申请人： John D. Barr , Terry R. Matthias , Malcolm R. Taylor
发明人： John D. Barr , Terry R. Matthias , Malcolm R. Taylor
IPC分类号： E21B10/42 , E21B10/43 , E21B10/56 , E21B10/573 , E21B10/46
CPC分类号： E21B10/43 , E21B10/573
摘要： An elongate cutter for a drag-type drill bit includes a stud defining one end thereof and a cutting formation comprising a cutting face generally adjacent the other end. Length extends from one end to the other, depth extends generally transverse to the cutting face as well as transverse to the length, and width extends transverse to both length and depth. The stud has a cross section transverse to its length such that the cross section cannot be circumscribed by a reference circle whose diameter is equal to the maximum width of the cross section. The cross section also has an assumed section modulus, in the direction of depth, greater than that of the reference circle. The leading side of the cutter comprises a first planar zone adjacent the one end and a second planar zone adjacent the other end, and on which the cutting formation is carried. The maximum lateral dimension of the leading side is generally greater than or equal to the maximum width of the cutter.
摘要翻译：用于拖曳式钻头的细长切割器包括限定其一端的螺柱和包括大致相邻于另一端的切割面的切割结构。长度从一端延伸到另一端，深度通常横切切割面并且横向于长度延伸，宽度横向于长度和深度。螺柱具有横向于其长度的横截面，使得横截面不能被直径等于横截面的最大宽度的参考圆包围。横截面在深度方向上也具有大于参考圆的横截面模数。切割器的前侧包括邻近一端的第一平面区域和与另一端相邻的第二平面区域，并且在其上承载切割结构。前侧的最大横向尺寸通常大于或等于切割器的最大宽度。

4. 发明授权

US4862977A Drill bit and cutter therefor 失效
标题翻译：钻头和刀具
公开(公告)号：US4862977A
公开(公告)日：1989-09-05
申请号：US33072
申请日：1987-03-31
申请人： John D. Barr , Terry R. Matthias , Malcolm R. Taylor
发明人： John D. Barr , Terry R. Matthias , Malcolm R. Taylor
IPC分类号： E21B10/42 , E21B10/43 , E21B10/56 , E21B10/573
CPC分类号： E21B10/43 , E21B10/573
摘要： An elongate cutter for a drag-type drill bit includes a stud defining one end thereof and a cutting formation comprising a cutting face generally adjacent the other end. Length extends from one end to the other, depth extends generally transverse to the cutting face as well as transverse to the length, and width extends transverse to both length and depth. The stud has a cross section transverse to its length such that the cross section cannot be circumscribed by a reference circle whose diameter is equal to the maximum width of the cross section. The cross section also has an assumed section modulus, in the direction of depth, greater than that of the reference circle. The leading side of the cutter comprises a first planar zone adjacent the one end and a second planar zone adjacent the other end, and on which the cutting formation is carried. The maximum lateral dimension of the leading side is generally greater than or equal to the maximum width of the cutter.
摘要翻译：用于拖曳式钻头的细长切割器包括限定其一端的螺柱和包括大致相邻于另一端的切割面的切割结构。长度从一端延伸到另一端，深度通常横切切割面并且横向于长度延伸，宽度横向于长度和深度。螺柱具有横向于其长度的横截面，使得横截面不能被直径等于横截面的最大宽度的参考圆包围。横截面在深度方向上也具有大于参考圆的横截面模数。切割器的前侧包括邻近一端的第一平面区域和与另一端相邻的第二平面区域，并且在其上承载切割结构。前侧的最大横向尺寸通常大于或等于切割器的最大宽度。

5. 发明授权

US4697654A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US4697654A
公开(公告)日：1987-10-06
申请号：US754570
申请日：1985-07-12
申请人： John D. Barr , Malcolm R. Taylor
发明人： John D. Barr , Malcolm R. Taylor
IPC分类号： E21B10/46 , E21B10/42 , E21B10/43 , E21B10/60
CPC分类号： E21B10/43 , E21B10/60
摘要： A rotary drill bit for use in drilling deep holes in subsurface formations comprises a bit body having a leading face and a gauge region, a plurality of cutting elements mounted at the surface of the leading face of the bit body, a passage in the bit body for supplying drilling fluid to a plurality of openings in the leading face of the bit body, and one or more junk slots in the gauge region of the bit body, whereby drilling fluid emerging from the openings flow over the leading face of the bit body and past the cutting elements thereon, so as to cool and clean the cutting elements before exiting through the junk slot. At least one of the openings is located in an area of the leading face adjacent the gauge region, and is angularly spaced from the nearest associated junk slot, the flow path between the opening and the junk slot being such that, in normal use of the bit, drilling fluid flowing from the opening to that junk slot flows substantially peripherally along an outer peripheral region of the leading face of the bit, adjacent the gauge region, so as to flow past cutting elements in that peripheral region.
摘要翻译：一种用于钻进地下构造中的深孔的旋转钻头，包括钻头体，其具有前表面和测量区域，多个切削元件安装在钻头体的前表面的表面，钻头体中的通道用于向钻头体的前表面中的多个开口提供钻井流体，以及钻头体的表面区域中的一个或多个垃圾槽，由此从开口流出的钻井流体流过钻头体的前表面，通过其上的切割元件，以便在通过垃圾槽离开之前冷却和清洁切割元件。至少一个开口位于邻近测量区域的引导面的区域中，并且与最近的相关联的垃圾槽成角度地间隔开，开口和垃圾槽之间的流动路径使得在正常使用从开口流向该垃圾槽的钻井流体沿钻头的前端面的外围区域大致周边流动，邻近测量区域，以便流过该周边区域中的切削元件。

6. 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。

7. 发明授权

US5553678A Modulated bias units for steerable rotary drilling systems 失效
标题翻译：用于可转向旋转钻井系统的调制偏置单元
公开(公告)号：US5553678A
公开(公告)日：1996-09-10
申请号：US937061
申请日：1992-08-27
申请人： John D. Barr , Mark W. Burrell , Robert A. Russell , Richard Thorp , David Boast , John Clegg
发明人： John D. Barr , Mark W. Burrell , Robert A. Russell , Richard Thorp , David Boast , John Clegg
IPC分类号： E21B4/02 , E21B7/04 , E21B7/06 , E21B41/00 , E21B47/01 , E21B47/022 , E21B47/024 , E21B7/08
CPC分类号： E21B7/06 , E21B4/02 , E21B41/0085 , E21B47/01 , E21B47/022 , E21B47/024 , E21B7/04 , E21B7/064
摘要： A modulated bias unit is provided for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations. The unit comprises a plurality of hydraulic actuators spaced apart around the periphery of the unit and having movable thrust members hydraulically displaceable outwardly for engagement with the formation of the borehole being drilled. Each actuator has an inlet passage for connection to a source of drilling fluid under pressure and an outlet passage for communication with the annulus. A selector control valve connects the inlet passages in succession to the source of fluid under pressure, as the unit rotates, and a choke is provided to create a pressure drop between the source of fluid under pressure and the selector valve. A further choke is provided in the outlet passage from each actuator unit. The actuators and control valve arrangements may take a number of different forms.
摘要翻译：提供调制偏置单元，用于在钻井时在地下地层钻孔时控制旋转钻头的钻孔方向。该单元包括围绕该单元的周边间隔开的多个液压致动器，并且具有可向外液压移位的可移动推力构件，用于与正在钻孔的钻孔的形成接合。每个致动器具有用于连接到压力下的钻井液源的入口通道和用于与环形空间连通的出口通道。选择器控制阀在单元旋转时连续地将入口通道连接到压力源，并且提供扼流圈以在压力下的流体源和选择阀之间产生压降。在每个致动器单元的出口通道中设置另一个扼流圈。致动器和控制阀装置可以采取多种不同的形式。

8. 发明授权

US5061293A Cutting elements for rotary drill bits 失效
标题翻译：旋转钻头切割元件
公开(公告)号：US5061293A
公开(公告)日：1991-10-29
申请号：US523322
申请日：1990-05-14
申请人： John D. Barr , Thomas A. Newton, Jr.
发明人： John D. Barr , Thomas A. Newton, Jr.
IPC分类号： B23P15/28 , E21B10/56 , E21B10/567
CPC分类号： E21B10/567 , B23P15/28
摘要： A preform cutting element for a rotary drill bit includes a layer of polycrystalline diamond material, the rear face of which is bonded to the front face of a backing layer of less hard material, such as tungsten carbide. The rear face of the backing layer is substantially greater in area than the rear face of the diamond layer. A method of manufacturing such cutting elements comprises forming an intermediate structure comprising polycrystalline diamond material bonded between two outer layers of tungsten carbide, and then cutting the intermediate structure to provide two pieces, each of the pieces including part of the diamond material and at least a major part of a respective one of the two outer layers.
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层，其后表面结合到诸如碳化钨之类的较硬硬质材料的背衬层的前表面。背衬层的后表面的面积比金刚石层的后表面大得多。制造这种切割元件的方法包括形成包括结合在两个碳化钨外层之间的多晶金刚石材料的中间结构，然后切割中间结构以提供两个片，每个片包括金刚石材料的一部分和至少一个两个外层中的相应一个的主要部分。

9. 发明授权

US4727946A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US4727946A
公开(公告)日：1988-03-01
申请号：US876847
申请日：1986-06-20
申请人： John D. Barr , Terry R. Matthias
发明人： John D. Barr , Terry R. Matthias
IPC分类号： E21B10/56 , E21B10/567 , E21B10/60
CPC分类号： E21B10/567 , E21B10/602
摘要： A rotary drill bit, for drilling wells in subsurface earth formations, and designed for rotation in a given direction, comprises a bit body having an internal passageway for drilling fluid. The bit body has an operating end face and at least one opening through that face communicating with the passageway. Cutters on the bit body form at least one elongate cutting region extending generally radially along a substantial portion of the operating end face. The cutters have cutting surfaces facing in the forward direction and generally continuous cutting edges at the outer extremity of the cutting surfaces. An elongate fence is carried on the bit body, extending generally parallel to the cutting region and spaced from the cutting region in a leading direction. The fence is adapted to ride loosely over the earth formation in use and in the absence of a positive pressure differential across the fence rear to front, and to more tightly engage the earth formation in the presence of such positive pressure differential, tightness of engagement increasing with the pressure differential. The opening in the operating end face of the bit body is positioned to deliver drilling fluid from the passageway to the area between the cutting region and the fence.
摘要翻译：用于在地下地层中钻井并用于在给定方向上旋转的旋转钻头包括具有用于钻探流体的内部通道的钻头体。钻头体具有操作端面和通过与通道连通的面的至少一个开口。钻头体上的切割器形成至少一个沿着操作端面的大部分径向延伸的细长切割区域。切割器具有面向正向的切割表面，并且在切割表面的外端处具有大致连续的切割边缘。细长的栅栏被承载在钻头体上，大致平行于切割区域延伸并且沿着前进方向与切割区域间隔开。围栏适于在使用中松散地穿过地层，并且在隔离栅栏后方到前方没有正压差，并且在存在正压差的情况下更紧密地接合地层，接合紧密度增加与压力差。钻头体的操作端面中的开口定位成将钻井液从通道输送到切割区域和围栏之间的区域。

10. 发明授权

US4570725A Drill bit cutter 失效
标题翻译：钻头切割机
公开(公告)号：US4570725A
公开(公告)日：1986-02-18
申请号：US575556
申请日：1984-01-31
申请人： Terry R. Matthias , John D. Barr
发明人： Terry R. Matthias , John D. Barr
IPC分类号： E21B10/42 , E21B10/43 , E21B10/56 , E21B10/573 , E21B10/46 , E21B10/00
CPC分类号： E21B10/43 , E21B10/573
摘要： The invention comprises a cutter for a drag-type drill bit, the cutter having a stud portion defining one end thereof and a cutting formation generally adjacent the other end, said stud portion having external side walls which, throughout a major part of the length of said stud portion and in transverse cross section, define a circle interrupted by at least one section of greater radius of curvature.
摘要翻译：本发明包括一种用于拖曳式钻头的切割器，该切割器具有限定其一端的螺柱部分和大致相邻于另一端的切割部分，所述螺柱部分具有外侧壁，该侧壁在长度方向上的主要部分所述螺柱部分并且在横截面中限定由至少一个更大曲率半径的部分中断的圆。

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