公开(公告)号：US4248314A

公开(公告)日：1981-02-03

申请号：US43532

申请日：1979-05-29

Applicant: Robert A. Cunningham ,  Rudolph C. O. Pessier

Inventor： Robert A. Cunningham ,  Rudolph C. O. Pessier

IPC: E21B7/28 ,  E21B10/12 ,  E21B10/16 ,  E21B10/28 ,  E21B10/52 ,  E21B10/22

CPC classification number: E21B10/28 ,  E21B10/12 ,  E21B10/16 ,  E21B10/52 ,  E21B7/28

Abstract: An earth boring drill bit for large diameter shafts has an improved cutter arrangement. The drill bit has a cutter support member with a number of cutters mounted to it for disintegrating the earth formation face. At least one inner cutter is mounted near the center for cutting the center area. A number of gage cutters are mounted at the periphery to cut the gage area of the shaft. A number of intermediate cutters are spaced between the inner and gage cutters. Each intermediate cutter overlaps one-half of its width with an adjacent intermediate cutter.

Abstract translation: 用于大直径轴的钻孔钻具具有改进的切割装置。 钻头具有刀片支撑构件，其具有安装到其上的多个切割器，用于分解地层形成面。 在中心附近安装至少一个内刀片，用于切割中心区域。 在周边安装了许多量具切割器以切割轴的表面积。 许多中间切割器在内切刀与切刀之间间隔开。 每个中间刀具与其相邻的中间刀具重叠其宽度的一半。

公开(公告)号：US4445734A

公开(公告)日：1984-05-01

申请号：US327524

申请日：1981-12-04

Applicant: Robert A. Cunningham

Inventor： Robert A. Cunningham

IPC: E21B17/02 ,  H01R13/523 ,  H01R4/64

CPC classification number: H01R13/523 ,  E21B17/028

Abstract: A string of earth boring drill pipe has telemetry features. Each section of the drill pipe has a box tool joint on one end and a pin tool joint on the other end, with an insulated wire segment extending through the section. A contact ring is connected to one end of the wire segment and mounted to one of the tool joints. The contact ring has an exposed side. An annular contact member is connected to the other end of the wire segment and has an exposed side for contacting the exposed side of the contact ring when making up with another section. The contact member is laterally flexible and is mounted in an insulating member that is subjected to internal pressure in the drill string for urging the contact member toward the contact ring.

Abstract translation: 一排钻孔钻具具有遥测功能。 钻杆的每个部分在一端具有箱形工具接头，在另一端具有销工具接头，并且具有延伸穿过该部分的绝缘线段。 接触环连接到线段的一端，并安装到一个工具接头上。 接触环具有暴露面。 环形接触构件连接到线段的另一端，并且具有暴露侧，用于在与另一部分配合时接触接触环的暴露侧。 接触构件是侧向柔性的并且安装在绝缘构件中，该绝缘构件在钻柱中经受内部压力以将接触构件推向接触环。

公开(公告)号：US4694855A

公开(公告)日：1987-09-22

申请号：US869833

申请日：1986-05-23

Applicant: Robert A. Cunningham

Inventor： Robert A. Cunningham

IPC: E21B21/10 ,  E21B34/08 ,  F16K15/04

CPC classification number: E21B21/10 ,  E21B34/08 ,  Y10T137/7873 ,  Y10T137/791

Abstract: An inside blowout preventer for use in an earth boring drill string has features to reduce erosion. The blowout preventer has a valve body for connection into the drill string with a longitudinal passage extending through the body. The ball seat is located in the longitudinal passage. A ball storage location is located below the seat, and offset from the longitudinal passage. A ball is carried in the storage location during downward flow, and moves into the longitudinal passage to seat against the seat if the upward flow is sufficient. The storage location is located in an area of the longitudinal passage which has a much larger flow area than through the seat. The downward flow impinges on a portion of the ball. A communication passage extends from the storage location downward to a reduced diameter section of the longitudinal passage.

Abstract translation: 用于钻凿钻铤的内部防喷器具有减少侵蚀的特征。 防喷器具有用于连接到钻柱中的阀体，其具有延伸穿过主体的纵向通道。 球座位于纵向通道中。 球存储位置位于座椅下方，并且从纵向通道偏移。 如果向上流动足够，球在向下流动的过程中在存放位置被运送到纵向通道中以抵靠座椅。 储存位置位于纵向通道的区域中，该区域的流动面积大于通过座椅的流动面积。 向下的流动撞击球的一部分。 连通通道从存储位置向下延伸到纵向通道的缩径部分。

公开(公告)号：US4431066A

公开(公告)日：1984-02-14

申请号：US235481

申请日：1981-02-18

Applicant: Robert A. Cunningham ,  George E. Dolezal

Inventor： Robert A. Cunningham ,  George E. Dolezal

IPC: E21B10/08 ,  E21B10/22

CPC classification number: E21B10/22 ,  E21B10/08

Abstract: An earth boring bit has features to reduce stress concentration. The earth boring bit is of the type having three bit legs, each bit leg having a depending bearing pin for rotatably carrying a cutter. An annular fillet is formed at the junction of the bearing pin and the bit leg for receiving a seal ring. To relieve stress above the fillet and on the inside surface of the bit leg, a depression is formed. The depression is formed in the inside surface of the bit leg with a lower edge commencing at the top of the fillet. The depression is curved in vertical cross-section and is located behind the backface of the cutter.

Abstract translation: 地球钻头具有减少应力集中的特点。 地镗头是具有三个位腿的类型，每个位腿具有用于可旋转地携带刀具的从动轴承销。 在轴承销和钻头腿的接合处形成环形圆角，用于接收密封环。 为了减轻圆角和位腿内表面上的应力，形成凹陷。 凹陷形成在钻头腿的内表面中，下边缘从圆角的顶部开始。 凹陷在垂直横截面上弯曲并且位于切割器的背面后面。

公开(公告)号：US5755810A

公开(公告)日：1998-05-26

申请号：US748601

申请日：1996-11-13

Applicant: Robert A. Cunningham

Inventor： Robert A. Cunningham

IPC: A61B17/00 ,  A61B17/74 ,  A61F2/00 ,  A61F2/30 ,  A61F2/36 ,  A61F2/32

CPC classification number: A61F2/36 ,  A61B17/00491 ,  A61B17/742 ,  A61F2/30771 ,  A61F2/3662 ,  A61F2/367 ,  A61F2/3672 ,  A61F2/3676 ,  A61F2002/30018 ,  A61F2002/30113 ,  A61F2002/30131 ,  A61F2002/30205 ,  A61F2002/30253 ,  A61F2002/30327 ,  A61F2002/30332 ,  A61F2002/30729 ,  A61F2002/3611 ,  A61F2002/3631 ,  A61F2002/3647 ,  A61F2002/365 ,  A61F2002/3684 ,  A61F2220/0033 ,  A61F2230/0006 ,  A61F2230/0013 ,  A61F2230/0067 ,  A61F2230/0076 ,  A61F2250/0029 ,  A61F2250/0039 ,  A61F2310/00011

Abstract: A femoral prosthesis has load shoulders for transferring normal loading to the femur at the proximal end to reduce stress shielding. The femur is resected to provide a flat load shoulder perpendicular to the axis of the femur. The prosthesis has a mating load shoulder in its proximal section which lands on the load shoulders formed in the femur. The prosthesis has a stem that extends downward to a distal end. The intermediate portion of the stem between the distal end and the proximal end is reduced in diameter to add flexibility. The distal end is substantially the diameter of the bone cavity.

Abstract translation: 股骨假体具有用于将正常负载传递到近端的股骨的负载肩部，以减少应力屏蔽。 切除股骨以提供垂直于股骨轴线的平坦负载肩部。 假体在其近端部分具有接合负载肩部，其位于形成在股骨中的负载肩部上。 假体具有向下延伸到远端的杆。 在远端和近端之间的杆的中间部分的直径减小以增加柔性。 远端基本上是骨腔的直径。

公开(公告)号：US4548431A

公开(公告)日：1985-10-22

申请号：US661533

申请日：1984-10-16

Applicant: James R. Hall ,  Robert A. Cunningham

Inventor： James R. Hall ,  Robert A. Cunningham

IPC: E21B17/042 ,  F16L15/06 ,  F16L25/00

CPC classification number: E21B17/042

Abstract: A tool joint for earth boring drill pipe members has features that increase the amount of torque required to yield the connection. The tool joint has both external and internal make-up shoulders. The pin and box are dimensioned so that the box face contacts the external shoulder while there still is a clearance between the pin face and the internal shoulder. At normal make-up torque, the external shoulder will be tightened to its normal amount. The internal shoulder will tighten to its yield only if additional torque is encountered while drilling. The internal shoulder adds to the amount of torque required to yield the tool joint connection.

Abstract translation: 用于钻孔钻杆构件的工具接头具有增加产生连接所需的扭矩量的特征。 工具接头具有外部和内部的化妆肩部。 销和盒的尺寸被设计成使得盒子面接触外肩部，同时在针面和内肩之间仍有间隙。 在正常的化妆扭矩下，外肩将收紧到正常的量。 只有在钻孔时遇到额外的扭矩，才会使内肩收紧。 内部肩部增加产生工具接头连接所需的扭矩量。