公开(公告)号：US5862873A

公开(公告)日：1999-01-26

申请号：US616361

申请日：1996-03-15

申请人： Terry R. Matthias ,  Alex Newton ,  Daniel J. Sarik

发明人： Terry R. Matthias ,  Alex Newton ,  Daniel J. Sarik

IPC分类号： E21B10/56 ,  E21B10/573 ,  E21B10/46

CPC分类号： E21B10/5735

摘要： A preform element, for example for use as a cutting element on a rotary drag-type drill bit, includes a facing table of superhard material having a front face and a rear face bonded to the front face of a substrate which is less hard than the superhard material. The rear face of the facing table comprises a surface formed with a plurality of spaced protuberances and a plurality of spaced sockets, and the front face of the substrate comprises a surface which is bonded to the surface of the facing table and is formed with a plurality of spaced protuberances which are bonded within said sockets in the facing table, and a plurality of spaced sockets within which are bonded said protuberances on the facing table.

摘要翻译： 预型件元件例如用作旋转拖曳式钻头上的切割元件，包括超硬材料的对置台，其具有接合到基板的正面的前表面和后表面，所述前表面和后表面的硬度小于 超硬材料 面对桌的后表面包括形成有多个间隔开的突起和多个间隔开的插座的表面，并且基板的前表面包括一个表面，该表面粘合到相对台的表面并形成多个 间隔开的突起结合在所述对置台中的所述插座内，并且多个间隔开的插座将所述突起粘合在所述面对台上。

公开(公告)号：US5778992A

公开(公告)日：1998-07-14

申请号：US733060

申请日：1996-10-16

申请人： John Michael Fuller

发明人： John Michael Fuller

IPC分类号： E21B7/06

CPC分类号： E21B7/068

摘要： A drilling assembly for drilling holes in subsurface formations comprises a drill bit 10, a drive unit 12 including a housing and a rotor 11 operatively coupled to the drill bit to rotate the drill bit relative to the housing, and a modulated bias unit 14 coupled to rotate with the drive unit housing and apply a lateral bias thereto in synchronism with rotation of the housing. The modulated bias unit 14 comprises one or more hydraulic actuators including members 16 which, in use, bear against the sides of the borehole, and means for modulating the pressure of fluid supplied to the actuators in synchronism with rotation of a component of the drilling assembly, and in selected angular phase relation thereto, whereby each hydraulic actuator is actuated in a selected rotational position of the component.

摘要翻译： 用于在地下地层中钻孔的钻井组件包括钻头10，包括壳体的驱动单元12和可操作地联接到钻头以相对于壳体旋转钻头的转子11，以及耦合到 与驱动单元壳体一起旋转，并且与壳体的旋转同步地向其施加横向偏置。 调制偏压单元14包括一个或多个液压致动器，其包括在使用中抵靠钻孔的侧面的构件16，以及用于与提供给致动器的流体的压力同步地与钻孔组件的部件的旋转同步地调节的装置 ，并且以选定的角度相位关系，由此每个液压致动器在组件的选定旋转位置被致动。

公开(公告)号：US5651421A

公开(公告)日：1997-07-29

申请号：US541771

申请日：1995-10-10

申请人： Alex Newton ,  Malcolm R. Taylor ,  John M. Fuller ,  Andrew Murdock

发明人： Alex Newton ,  Malcolm R. Taylor ,  John M. Fuller ,  Andrew Murdock

IPC分类号： E21B10/42 ,  E21B10/43 ,  E21B10/54 ,  E21B10/55 ,  E21B10/60 ,  E21B10/16

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 having a shank for connection to a drill string, a number of circumferentially spaced blades on the bit body each extending outwardly away from the central axis of rotation of the bit, a number of cutters mounted side-by-side along each blade, and a passage 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 on the primary blades 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 on the secondary blades are secondary cutters each of which is located at substantially the same radial distance from the bit axis as an associated primary cutter on the preceding primary blade.

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，钻头体上的多个周向间隔开的叶片每个从钻头的中心旋转轴线向外延伸， 沿着每个叶片并排安装的切割器，以及钻头体中的用于向钻头表面提供钻井液的通道，用于清洁和冷却切割器。 叶片包括交替的主叶片和次叶片。 主叶片上的切割器是位于与钻头轴线不同的径向距离处的初级切割器，以便限定切割轮廓，该切割轮廓在使用中基本覆盖被钻孔的整个底部的底部。 至少大多数次级叶片上的切割器是二次切割器，每个切割器位于与前一主叶片上的相关联的主切割器相比从钻头轴线基本相同的径向距离处。

公开(公告)号：US5622233A

公开(公告)日：1997-04-22

申请号：US491061

申请日：1995-06-16

申请人： Nigel D. Griffin

发明人： Nigel D. Griffin

IPC分类号： B23B27/14 ,  E21B10/56 ,  E21B10/567 ,  E21B10/573 ,  E21B10/46

CPC分类号： E21B10/567 ,  B23B27/146 ,  E21B10/5735 ,  B23B2222/28 ,  B23B2226/315 ,  Y10T407/26 ,  Y10T407/27 ,  Y10T408/78

摘要： A preform element, for example for use as a cutter in a rotary drill bit, includes a facing table of polycrystalline diamond bonded to a substrate of tungsten carbide. The rear surface of the facing table is integrally formed with a plurality of protuberances which project into the substrate and are spaced apart irregularly across the rear surface of the facing table. The protuberances may differ in cross-sectional shape and/or size, and the distribution of the different sizes and/or shapes may also be irregular. The protuberances may also project into the substrate to irregularly varying depths.

摘要翻译： 预型件元件例如用作旋转钻头中的切割器，包括结合到碳化钨基底的多晶金刚石的面对台。 面对台的后表面与多个凸起一体地形成，突出部分突出到衬底中并且不规则地间隔穿过对置台的后表面。 突起在横截面形状和/或尺寸上可能不同，并且不同尺寸和/或形状的分布也可以是不规则的。 突起也可以投影到基底中以不规则地变化的深度。

公开(公告)号：US5617928A

公开(公告)日：1997-04-08

申请号：US491063

申请日：1995-06-16

申请人： Terry R. Matthias ,  John M. Fuller ,  Nigel D. Griffin

发明人： Terry R. Matthias ,  John M. Fuller ,  Nigel D. Griffin

IPC分类号： B23B27/14 ,  E21B10/56 ,  E21B10/567 ,  E21B10/573 ,  E21B10/46

CPC分类号： E21B10/567 ,  B23B27/146 ,  E21B10/5735 ,  B23B2222/28 ,  B23B2226/315 ,  Y10T407/26 ,  Y10T407/27 ,  Y10T408/78

摘要： A preform cutting element, for use on a rotary drill bit, includes a facing table of polycrystalline diamond bonded to a tungsten carbide substrate, a cutting edge being formed by part of the peripheral surface of the facing table. The rear surface of the facing table is integrally formed with a plurality of spaced elongate ribs which project into the substrate, at least the majority of the ribs being located in the vicinity of the cutting edge. The ribs may intersect the cutting edge and extend only part way across the facing table from the cutting edge. The ribs may vary in width and/or depth.

摘要翻译： 用于旋转钻头的预成型件切割元件包括结合到碳化钨基底的多晶金刚石的面对台，切削刃由面对台的周边表面的一部分形成。 面对台的后表面与多个间隔开的细长肋整体形成，凸条突出到衬底中，至少大部分肋位于切割边缘附近。 这些肋可以与切割边缘相交，并且仅从切割边缘部分地穿过相对的桌子。 肋可以在宽度和/或深度方面变化。

公开(公告)号：US5706905A

公开(公告)日：1998-01-13

申请号：US604324

申请日：1996-02-21

申请人： John D. Barr

发明人： John D. Barr

IPC分类号： E21B7/06 ,  E21B21/10

CPC分类号： E21B17/1014 ,  E21B21/10 ,  E21B7/06

摘要： A modulated bias unit, for use in a steerable rotary drilling system, comprises a number of hydraulic actuators spaced apart 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, and a control valve operable to bring the actuators alternately in succession into and out of communication with a source of fluid under pressure, as the bias unit rotates. The fluid pressure supplied to each actuator may thus be modulated in synchronism with rotation of the drill bit, and in selected phase relation thereto, so that each movable thrust member is displaced outwardly at the same rotational position of the bias unit so as to apply a lateral bias to the unit for the purposes of steering an associated drill bit. To enable the biasing action to be neutralized or reduced there is provided an auxiliary shut-off valve in series with the control valve, which is operable to prevent the control valve from passing the maximum supply of fluid under pressure to the hydraulic actuators.

摘要翻译： 用于可转向旋转钻井系统中的调制偏压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液压移位以与钻孔的形成接合的可移动推力构件，以及 一个控制阀可操作以使执行器随着偏压单元的旋转而交替地连续地与压力流体源连通。 因此，提供给每个致动器的流体压力可以与钻头的旋转同步地调节，并且与选定的相位关系一起调节，使得每个可移动推力构件在偏置单元的相同旋转位置向外移位，以便施加 为了转向相关的钻头，该单元的侧向偏压。 为了能够中和或减少偏压作用，提供了与控制阀串联的辅助截止阀，其可操作以防止控制阀将压力下的最大流体供应通过液压致动器。

公开(公告)号：US5605199A

公开(公告)日：1997-02-25

申请号：US493191

申请日：1995-06-20

申请人： Alex Newton

发明人： Alex Newton

IPC分类号： E21B10/56 ,  E21B10/573 ,  E21B10/46

CPC分类号： E21B10/5735

摘要： A preform element includes a facing table of super hard material having a from face, an outer peripheral surface, and a rear surface bonded to a substrate which is less hard than the super hard material. The facing table comprising a peripheral region surrounding an inner region, the peripheral region having an inner surface which is inclined at an angle of greater than 90.degree. to the rear surface 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. The inner region of the facing table may be formed with projections extending into the substrate.

摘要翻译： 预成型件元件包括超硬材料的对置台，其具有从表面，外周面和粘结到基底的后表面，其比超硬材料硬。 所述面对台包括围绕内部区域的周边区域，所述周边区域具有内表面，所述内表面相对于所述面对台面的后表面以大于90度的角度倾斜，以便朝向具有向后的部件的方向 从面向桌子以及向内朝向所述内部区域。 面对台的内部区域可以形成有延伸到基板中的突起。

公开(公告)号：US5553679A

公开(公告)日：1996-09-10

申请号：US455270

申请日：1995-05-31

申请人： Richard E. Thorp

发明人： Richard E. Thorp

IPC分类号： E21B4/00 ,  E21B7/04 ,  E21B7/06 ,  E21B7/08 ,  E21B17/10

CPC分类号： E21B4/003 ,  E21B17/1014 ,  E21B7/04 ,  E21B7/06

摘要： A modulated bias unit, for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations, comprises a number of hydraulic actuators spaced apart around the periphery of the unit. Each actuator comprises a movable thrust member which is hydraulically displaceable outwardly and a pivotally mounted formation-engaging pad which overlies the thrust member. An inlet passage supplies fluid under pressure to the chamber, and an outlet passage delivers fluid from the chamber to a lower pressure zone. A selector control valve modulates the fluid pressure supplied to each actuator in synchronism with rotation of the drill bit so that, as the drill bit rotates, each pad is displaced outwardly at the same selected rotational position so as to bias the drill bit laterally and thus control the direction of drilling. The outlet passage from the chamber passes through the thrust member so as to wash the region where the formation-engaging pad overlies the thrust member as the fluid flows to the annulus between the unit and the borehole.

摘要翻译： 用于控制在地下地层钻孔时控制旋转钻头的钻孔方向的调制偏压单元包括围绕单元周边间隔开的多个液压致动器。 每个致动器包括可向外液压移位的可移动推力构件和位于推力构件上的枢转地安装的地层接合垫。 入口通道在压力下向腔室供应流体，并且出口通道将流体从腔室输送到较低压力区域。 选择器控制阀与钻头的旋转同步地调节供应给每个致动器的流体压力，使得当钻头转动时，每个焊盘在相同的选定旋转位置向外移位，以便横向偏置钻头 控制钻井方向。 来自腔室的出口通道通过推力构件，以便当流体流到单元和钻孔之间的环形空间时，清洗形成接合垫覆盖推力构件的区域。

公开(公告)号：US5520255A

公开(公告)日：1996-05-28

申请号：US455455

申请日：1995-05-31

申请人： John D. Barr ,  Richard E. Thorp ,  Robert A. Russell

发明人： John D. Barr ,  Richard E. Thorp ,  Robert A. Russell

IPC分类号： E21B4/00 ,  E21B7/04 ,  E21B7/06 ,  E21B7/08 ,  E21B17/10

CPC分类号： E21B4/003 ,  E21B17/1014 ,  E21B7/04 ,  E21B7/06

摘要： A modulated bias unit, for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations, comprises a number of hydraulic actuators spaced apart 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. A selector control valve modulates the fluid pressure supplied to each actuator in synchronism with rotation of the drill bit so that, as the drill bit rotates, each movable thrust member is displaced outwardly at the same selected rotational position so as to bias the drill bit laterally and thus control the direction of drilling. The control valve is a disc valve comprising two relatively rotating elements having contiguous surfaces formed of polycrystalline diamond. The elements are maintained in coaxial relation by a polycrystalline diamond bearing pin which extends axially from one element and engages in a central axial bearing aperture in the other element.

摘要翻译： 用于控制在地下地层钻孔时用于控制旋转钻头的钻孔方向的调制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液压移位的可移动推力构件 与正在钻孔的钻孔的形成接合。 选择器控制阀调节与钻头的旋转同步地供应给每个致动器的流体压力，使得当钻头旋转时，每个可移动推力构件在相同的选定旋转位置向外移位，以便将钻头横向偏置 从而控制钻井方向。 控制阀是包括两个相对旋转的元件的盘阀，其具有由多晶金刚石形成的邻接表面。 这些元件通过多晶金刚石轴承销保持同轴的关系，该多晶金刚石轴承销从一个元件轴向延伸并且接合在另一个元件中的中心轴向轴承孔。

公开(公告)号：US5487436A

公开(公告)日：1996-01-30

申请号：US183048

申请日：1994-01-18

申请人： Nigel D. Griffin

发明人： Nigel D. Griffin

IPC分类号： B22F7/06 ,  E21B10/56 ,  E21B10/567 ,  E21B10/46

CPC分类号： E21B10/567 ,  B22F7/06

摘要： A method of forming a cutter assembly for a rotary drill bit comprises locating in a mould a preform polycrystalline diamond cutting element of a non-thermally stable type, packing powdered matrix-forming material, such as powdered tungsten carbide, around at least part of the cutting element within the mould, and then infiltrating the powdered material with a metal alloy in a furnace to form a body of solid infiltrated matrix in which the cutting element is at least partly embedded. The metal alloy is selected to provide an infiltration temperature, for example of up to about 850.degree., which is not greater than the temperature at which significant thermal degradation of the cutting element would occur.

摘要翻译： 形成用于旋转钻头的切割器组件的方法包括在模具中定位非热稳定型的预型体多晶金刚石切割元件，包覆粉末状基质形成材料（例如粉末状碳化钨），其围绕至少部分 模具内的切割元件，然后在炉中用金属合金渗透粉末材料，以形成固体渗透基体，其中切割元件至少部分地嵌入其中。 选择金属合金以提供例如高达约850°的渗透温度，其不高于将发生切割元件的显着热降解的温度。