1
Ralph E Brumley, Mathew B Riordan, Richard H Bentley: Stabilizer. Eastman Whipstock, Jennings B Thompson, January 4, 1977: US04000549 (20 worldwide citation)

A stabilizer is disclosed that can be mounted on the outside of the drill string. It includes a tubular body having a bore to receive the drill string to allow the body to be moved over the drill string to the desired location. A portion of the bore has a locking taper in which is located a pluralit ...


2
Mathew B Riordan, Arley G Lee: Bearing. Eastman Whipstock, Jennings B Thompson, February 27, 1979: US04141605 (16 worldwide citation)

A bearing is disclosed that includes a support housing or casing in which is located a body of elastomeric material. A plurality of wear members are positioned to be supported by the body of elastomeric material and to receive the load placed on the bearing. The elastomeric body allows the wear inse ...


3
Anthony C Scott: Wire line anchor. Eastman Whipstock, Jennings B Thompson, Marvin B Eickenroht, June 16, 1981: US04273464 (16 worldwide citation)

A wire line anchor has a slot in its side wall that will move the slot into position to engage a key attached to a housing in a pipe string to hold the anchor against upward movement relative to the housing. The anchor is released from the key by subsequent downward movement followed by upward movem ...


4
John B Poston: Dump valve for use with downhole motor. Eastman Whipstock, Jennings B Thompson, Marvin B Eickenroht, March 31, 1981: US04258801 (12 worldwide citation)

A dump valve having a valve seat and a valve member is located in a string of drill pipe above a downhole motor. The dump valve connects the inside of the drill string with the annulus and allows drilling mud to flow freely therebetween when drilling mud is not being pumped through the drill string ...


5
Tommy L McClure: Position indicator for downhole tool. Eastman Whipstock, Jennings B Thompson, October 24, 1978: US04121657 (10 worldwide citation)

Apparatus is disclosed to indicate at the surface when a tool lowered into a well bore on an electric cable is properly positioned in a downhole housing. The tool has a key slot and a muleshoe is carried by the tool to engage a key located on the housing and to guide the key into the key slot to pro ...


6
Clifton A Burton: Mechanical well jar. Eastman Whipstock, Vaden Eickenroht Thompson & Boulware, May 19, 1987: US04665998 (6 worldwide citation)

A mechanical well jar is disclosed having inner and outer tubular members movable longitudinally relative to each other a limited distance for connecting in a pipe string. Annular shoulders on the members engage to limit the relative longitudinal movement of the members. A plurality of laterally spa ...


7
John Doise Jeter: Downhole motor rotor supports. Eastman Whipstock, John D Jeter, March 21, 1978: US04080094 (5 worldwide citation)

Method and apparatus to lift the rotor of an earth borehole downhole drilling motor with a resilient force that exceeds the rotor weight so that starting of the motor is more certain due to reduced drag on primary thrust bearings. Additionally the apparatus may be used to reduce imbalanced axial loa ...


8
Mathew B Riordan: Stator for a downhole fluid operated motor and method of assembling the same. Eastman Whipstock, Jennings B Thompson, Marvin B Eickenroht, June 10, 1980: US04207037 (3 worldwide citation)

A stator is disclosed for use with down-hole fluid powered drilling motors of the Moineau type. It includes a housing and a plurality of removable stator sections positioned in end-to-end, abutting relationship in the housing. Each section comprises a cylindrical body of elastomeric material having ...


9
Estep James Wilson: Mud pulse valve for measurement-while-drilling system. Eastman Whipstock, February 29, 1984: GB2125085-A (1 worldwide citation)

A valve for a measurement-while- drilling (MWD) system is disclosed that uses a cylindrical valve member 56 that passes through a valve member guide 42 that carries a seal 78 in sliding engagement with the cylindrical valve member 56. A longitudinal opening extending from the end of the valve member ...


10