Patents by Inventor Carl J. Roy
Carl J. Roy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7854258Abstract: A downhole tool is provided that includes a grip assembly for contacting a well formation. The grip assembly includes a gripper body; and a centralizer that is attached to and radially expandable with respect to the gripper body and that has a geometry which is lockable by a locking device. The grip assembly also includes a force amplifier in force transmitting relation with the centralizer, wherein the force amplifier transfers a force in a first direction to a much larger force in a second direction when the centralizer is locked by the locking device.Type: GrantFiled: March 3, 2009Date of Patent: December 21, 2010Assignee: Schlumberger Technology CorporationInventors: Todor K. Sheiretov, Dwight C. Chilcoat, Robin A. Ewan, Carl J Roy, Matthew Billingham, Franz Aguirre
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Publication number: 20090159269Abstract: A downhole tool is provided that includes a grip assembly for contacting a well formation. The grip assembly includes a gripper body; and a centralizer that is attached to and radially expandable with respect to the gripper body and that has a geometry which is lockable by a locking device. The grip assembly also includes a force amplifier in force transmitting relation with the centralizer, wherein the force amplifier transfers a force in a first direction to a much larger force in a second direction when the centralizer is locked by the locking device.Type: ApplicationFiled: March 3, 2009Publication date: June 25, 2009Inventors: Todor K. Sheiretov, Dwight C. Chilcoat, Robin A. Ewan, Carl J. Roy, Matthew Billingham, Franz Aguirre
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Patent number: 7516782Abstract: A downhole tool is provided that includes a grip assembly for contacting a well formation. The grip assembly includes a gripper body; and a centralizer that is attached to and radially expandable with respect to the gripper body and that has a geometry which is lockable by a locking device. The grip assembly also includes a force amplifier in force transmitting relation with the centralizer, wherein the force amplifier transfers a force in a first direction to a much larger force in a second direction when the centralizer is locked by the locking device.Type: GrantFiled: December 13, 2006Date of Patent: April 14, 2009Assignee: Schlumberger Technology CorporationInventors: Todor K. Sheiretov, Dwight C. Chilcoat, Robin A. Ewan, Carl J Roy, Matthew Billingham, Franz Aguirre
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Patent number: 7334642Abstract: A radially expandable tool is provided that includes a tool body and a radially moveable member coupled to the tool body and in force receiving relation to a constant force actuator. The radially moveable member is movable by the constant force actuator from an closed position to a plurality of radially expanded open positions, which includes a fully open position. The constant force actuator includes an opening arm having a force transmission member; and a movement control guide in force reacting engagement with the force transmission member. The tool also includes a linear force generator; which applies a linear force to the constant force actuator, which the actuator transfers to a radial force perpendicular to the linear force.Type: GrantFiled: March 29, 2006Date of Patent: February 26, 2008Assignee: Schlumberger Technology CorporationInventors: Falk W. Doering, Carl J. Roy
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Publication number: 20070181298Abstract: A downhole tool is provided that includes a grip assembly for contacting a well formation. The grip assembly includes a gripper body; and a centralizer that is attached to and radially expandable with respect to the gripper body and that has a geometry which is lockable by a locking device. The grip assembly also includes a force amplifier in force transmitting relation with the centralizer, wherein the force amplifier transfers a force in a first direction to a much larger force in a second direction when the centralizer is locked by the locking device.Type: ApplicationFiled: December 13, 2006Publication date: August 9, 2007Inventors: Todor K. Sheiretov, Dwight C. Chilcoat, Robin A. Ewan, Carl J. Roy, Matthew Billingham, Franz Aguirre
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Patent number: 7156192Abstract: A downhole tractor is provided that may be used in open or cased wells, and is also designed for use in open holes having a variety of soil/formation consistencies (e.g., soft, firm, rigid, etc.), varying diameters and non-uniform and irregular bore profiles. The tractor may include a track assembly including a plurality of idler wheels and a continuous track rotatably disposed around the idler wheels. A motor may be adapted to rotate the track around the idler wheels. Upper and lower arms may be pivotally connected to opposite ends of the track assembly and pivotally connected to a tractor housing. An actuator arm or link assembly may be provided to impart an outward force to the track assembly to move the track assembly outwardly into an open position and a retracting force to retract the track assembly into a closed position. A rotatable screw may be connected to a second motor, or a rod may be connected to a hydraulic system, to actuate the actuator arm or link assembly.Type: GrantFiled: July 15, 2004Date of Patent: January 2, 2007Assignee: Schlumberger Technology Corp.Inventors: Julio C. Guerrero, Falk W. Doering, Carl J. Roy, Paul J. Beguin
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Patent number: 6920936Abstract: 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 members from a minimum angle with the force transmitting members at maximum spacing to a maximum angle with the force transmitting members at minimum spacing to impart a substantially constant force to an object or surface, with the direction of the force being substantially perpendicular to the direction of relative linear movement of the force transmitting members. With the linkage arms at their minimum angles, movement control elements on at least one of the force transmitting members react with guide surfaces of the linkage arms to achieve angular linkage movement and to develop a substantially constant force during angular linkage movement.Type: GrantFiled: December 17, 2002Date of Patent: July 26, 2005Assignee: Schlumberger Technology CorporationInventors: Todor K. Sheiretov, Roger A. Post, Carl J. Roy, Joseph F. Cordera
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Patent number: 6629568Abstract: 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 inside wall of a conduit and adapted to selectively lock the arm in an extended position.Type: GrantFiled: August 3, 2001Date of Patent: October 7, 2003Assignee: Schlumberger Technology CorporationInventors: Roger A. Post, Todor K. Sheiretov, Carl J. Roy, Joseph F. Cordera
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Publication number: 20030173076Abstract: 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 members from a minimum angle with the force transmitting members at maximum spacing to a maximum angle with the force transmitting members at minimum spacing to impart a substantially constant force to an object or surface, with the direction of the force being substantially perpendicular to the direction of relative linear movement of the force transmitting members. With the linkage arms at their minimum angles, movement control elements on at least one of the force transmitting members react with guide surfaces of the linkage arms to achieve angular linkage movement and to develop a substantially constant force during angular linkage movement.Type: ApplicationFiled: December 17, 2002Publication date: September 18, 2003Inventors: Todor K. Sheiretov, Roger A. Post, Carl J. Roy, Joseph F. Cordera
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Publication number: 20030024710Abstract: 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 inside wall of a conduit and adapted to selectively lock the arm in an extended position.Type: ApplicationFiled: August 3, 2001Publication date: February 6, 2003Inventors: Roger A. Post, Todor K. Sheiretov, Carl J. Roy, Joseph F. Cordera
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Patent number: 6179055Abstract: A conveyance apparatus for conveying at least one logging tool through an earth formation traversed by a horizontal or highly deviated borehole. The conveyance apparatus comprises a pair of arcuate-shaped cams pivotally mounted to a support member, a spring member for biasing the arcuate surface of each cam into contact with the borehole wall, and actuators operatively connected to each cam. A logging tool is attached to the conveyance apparatus. When either actuator is activated in a first direction, the cam connected to the activated actuator is linearly displaced forward and the arcuate surface of the cam slides along the borehole wall. When either actuator is activated in a second direction, the activated actuator pulls the connected cam backwards and the spring member thereby urges the arcuate surface of the cam to lock against the borehole wall.Type: GrantFiled: September 11, 1998Date of Patent: January 30, 2001Assignee: Schlumberger Technology CorporationInventors: Alan J. Sallwasser, Roger A. Post, Carl J. Roy