1
Arnold M Walkow, Randy Gold, Albert A Alexy Jr, Wade D Dupree, Saeed Rafie: Magnetic motion coupling for well logging instruments. Western Atlas International, Richard A Fagin, June 29, 1999: US05917774 (23 worldwide citation)

A magnetic coupling for substantially synchronously transferring linear motion through a non magnetic barrier from a first movable element to a second movable element. The coupling comprises magnets disposed at spaced apart locations along the first element. The magnets each have a magnetization dir ...


2
Falk W Doering, Wade D DuPree: Chain drive system. Schlumberger Technology, Rodney Warfford, David Cate, Jaime Castano, May 29, 2007: US07222682 (21 worldwide citation)

A downhole tractor is provided that includes a motor, at least one rotatable screw powered by the motor, and a chain engageable with the at least one rotatable screw, whereby rotation of the at least one rotatable screw moves the chain.


3
Mark A Fredette, Scott Ritter, Wade D DuPree, Miguel F Pabon: Borehole caliper tool using ultrasonic transducer. Schlumberger Technology Corporation, Victor H Segura, Brigitte L Echols, July 4, 2006: US07069775 (18 worldwide citation)

A borehole caliper tool includes a tool body, a bow spring flexibly coupled to the tool body, a target coupled to the bow spring, and an ultrasonic transducer coupled to the tool body, wherein in operation the ultrasonic transducer transmits an acoustic pulse to the target and receives an echo of th ...


4
Marcelo F Civarolo, Wade D Dupree: Articulated downhole electrical isolation joint. Western Atlas International, Darryl M Springs, September 12, 2000: US06116337 (12 worldwide citation)

An articulated connector for providing electrical insulation between downhole well equipment such as logging sondes suspended by a wireline. Articulated joints are connected to the well equipment to provide for the desired movement, and the joints are connected by a central housing. The housing is c ...


5
Mark A Fredette, Scott Ritter, Wade D DuPree: Borehole caliper tool. Schlumberger Technology Corporation, Victor H Segura, Brigitte L Echols, November 7, 2006: US07131210 (10 worldwide citation)

A borehole caliper tool includes a tool body and an arm coupled to the tool body. The arm is deflectable relative to the tool body. The caliper tool further includes a cam coupled to the arm such that a position of the cam changes as the arm deflects. The caliper tool further includes a proximity se ...


6
Franz Aguirre, Wade D Dupree, Mark Holly, Derek Copold: Grip enhanced tractoring. Schlumberger Technology Corporation, Trevor Grove, John Vereb, Jody DeStefanis, December 10, 2013: US08602115 (9 worldwide citation)

A tractor configured for grip locking during advancement to avoid slippage, particularly in open-hole wells. The tractor is equipped with a grip lock mechanism for independently locking an anchor grip in a radially outward direction. This locking occurs sequentially in advance of the power stroke of ...


7
Franz Aguirre, Wade D Dupree, Mark Holly, Derek Copold: Downhole tool with roller screw assembly. Schlumberger Technology Corporation, Trevor Grove, December 16, 2014: US08910720 (1 worldwide citation)

A downhole tool for positioning in a wellbore comprises a tool main body, an electric motor disposed within the tool main body, the motor comprising a rotor rotatably attached to a stator, and a linear actuator assembly disposed within the motor for transforming a rotary output of the motor into a l ...


8
Wade D DuPree, Pierre Arnaud Foucher, Ruben Martinez: Continuous multi-stage well stimulation system. SCHLUMBERGER TECHNOLOGY CORPORATION, Jeffery R Peterson, Cathy Hewitt, February 16, 2016: US09260956

A system is provided that is conducive to multi-stage stimulation in a near-continuous fashion. That is, unlike conventional stimulation systems, embodiments herein may operate without the requirement of traditional plug-setting, perforating and fracturing interventions on a zone by zone basis for a ...


9
Falk W Doering, Wade D DuPree: Chain drive system. Schlumberger Conveyance And Delivery, December 1, 2005: US20050263325-A1

A system is provided for driving a chain or other flexible device. The system may include a power source connected to one or more screws that are engageable with the chain. Rotation of the screw or screws results in linear motion of the chain. The screws may be power screws, lead screws, or other kn ...


10
Wade D Dupree, Falk W Doering: Well Wall Gripping Element. Schlumberger Ipc, August 28, 2008: US20080202769-A1

A gripping element for incorporation into a track of a downhole tractor. The gripping element may be configured with an arcuate or curved surface in order to roughly match the arcuate nature of a well through which the downhole tractor is advanced. Due to the matching arcuate surfaces of the grippin ...