1
Sheiretov Todor K, Post Roger A, Roy Carl J, Cordera F Joseph: Constant force actuator. Schlumberger Services Petrol, Schlumberger Holdings, Schlumberger Technology, September 17, 2003: EP1344893-A2 (34 worldwide citation)

The invention provides a substantially constant force actuator that is applicable to centralizers, anchors and tractors for use in wells and is applicable to lifting devices such as jacks and load supporting devices. One or more sets of linkage arms are angularly movable by the force of one or more ...


2
Post Roger A, Sheiretov Todor K, Roy Carl J, Cordera Joseph F: Bi-directional grip mechanism for a wide range of bore sizes. Schlumberger Technology, Schlumberger Holdings, February 5, 2003: EP1281834-A1 (24 worldwide citation)

A linkage apparatus for selectively gripping and releasing the inside walls of a conduit, the apparatus comprising: a first arm (33); a bi-directional gripping cam (70) rotatably attached to the arm; and an extension and locking device (36,8) adapted to selectively radially extend the arm from a too ...


3
Sheiretov Todor K, Post Roger A, Robson Robert I, Cordera Joseph F: Connector latch. Schlumberger Technology, Schlumberger Holdings, September 4, 2002: EP1236859-A2 (1 worldwide citation)

A connector latch includes a housing body having an internal cavity, a grippable member slidably coupled to the housing body, and a hydraulic mechanism on the housing body for delaying sliding of the housing body relative to the grippable member when an external force is applied to the housing body.


4
Sallwasser Alan J, Post Roger A, Roy Carl J: Transport dun instrument de diagraphie dans un puits non vertical, Conveying a tool along a non-vertical well. Schlumberger Canada, Schlumberger Canada, SMART & BIGGAR, April 22, 2003: CA2271509

A conveyance apparatus for conveying at least one logging tool through an earth formation traversed by a horizontal or highly deviated borehole is disclosed. The conveyance apparatus comprises a pair of arcuate-shaped cams pivotally mounted to a support member, means for biasing the arcuate surface ...


5
Sheiretov Todor K, Post Roger A, Robson Robert Ian, Cordera Joseph F: Verrou de connexion temporise, Time-delayed connector latch. Schlumberger Canada, Schlumberger Canada, Smart & Biggar, December 1, 2009: CA2372522

A connector latch includes a housing body having an internal cavity, a grippable member slidably coupled to the housing body, and a hydraulic mechanism on the housing body for delaying sliding of the housing body relative to the grippable member when an external force is applied to the housing body.


6
Roy Carl J, Cordera Joseph F, Post Roger A, Sheiretov Todor K: Actionneur a force constante, Constant force actuator. Schlumberger Canada, Schlumberger Canada, SMART & BIGGAR, March 11, 2008: CA2421707

A substantially constant force actuator that is applicable to centralizers, anchors and tractors for use in wells and is applicable to lifting devices such as jacks and load supporting devices. One or more sets of linkage arms are angularly movable by the force of one or more force transmitting memb ...


7
Post Roger A, Sheiretov Todor K, Roy Carl J, Cordera Joseph F: Mecanisme de serrage bidirectionnel pour plusieurs dimensions de puits, Bi-directional grip mechanism for a wide range of bore sizes. Schlumberger Canada, Schlumberger Canada, SMART & BIGGAR, June 6, 2006: CA2396822

A linkage apparatus for selectively gripping and releasing the inside walls of a conduit, the apparatus comprising: a first arm; a bi-directional gripping cam rotatably attached to the arm; and an extension and locking device adapted to selectively radially extend the arm from a tool housing to an i ...