1
Todor K Sheiretov, Dwight C Chilcoat, Robin A Ewan, Carl J Roy, Matthew Billingham, Franz Aguirre: Self-anchoring device with force amplification. Schlumberger Technology Corporation, Rodney Warfford, David Cate, Jaime Castano, April 14, 2009: US07516782 (23 worldwide citation)

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 ...


2
Todor K Sheiretov, Dwight C Chilcoat, Robin A Ewan, Carl J Roy, Matthew Billingham, Franz Aguirre: Self-anchoring device with force amplification. Schlumberger Technology Corporation, Michael Flynn, David Hofman, Jody Destefanis, December 21, 2010: US07854258 (13 worldwide citation)

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 ...


3
Keith Nelson, Franz Aguirre: Passive centralizer. Schlumberger Technology Corporation, Michael L Flynn, David Hofman, Jody Lynn DeStefani, August 17, 2010: US07775272 (10 worldwide citation)

A passive centralizer for stably centering within a well. The centralizer may be of a retracted profile for advancement within the well and deployable for centralization upon reaching an operation site. Deployment may be achieved in an automated manner without the requirement of operator interaction ...


4
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 ...


5
Keith R Nelson, Gohar Saeed, Franz Aguirre: Force monitoring tractor. Schlumberger Technology Corporation, Trevor Grove, December 9, 2014: US08905148 (2 worldwide citation)

A downhole tractor assembly that is configured for open-hole applications. The assembly includes a force monitoring mechanism to help monitor and control forces imparted through a drive mechanism of the tractor in real time. As such, damage to open-hole formations due to excessive tractoring forces ...


6
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 ...


7
Todor K Sheiretov, Dwight C Chilcoat, Robin A Ewan, Carl J Roy, Matthew Billingham, Franz Aguirre: Self-anchoring device with force amplification. Schlumberger Ipc, August 9, 2007: US20070181298-A1

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 ...


8
Keith Nelson, Franz Aguirre: Passive Centralizer. Schlumberger Ipc, September 18, 2008: US20080223573-A1

A passive centralizer for stably centering within a well. The centralizer may be of a retracted profile for advancement within the well and deployable for centralization upon reaching an operation site. Deployment may be achieved in an automated manner without the requirement of operator interaction ...


9
Franz Aguirre, Todor K Sheiretov, Keith R Nelson: Self-Aligning Open-Hole Tractor. Schlumberger Ipc, August 21, 2008: US20080196901-A1

A downhole tractor assembly that is configured for open-hole applications and of a self-aligning nature. The self-aligning nature of the assembly is effectuated through a tractor portion which is rotable about an axis of an elongated body of the assembly independent of a separate centralizing portio ...


10
Keith R Nelson, Gohar Saeed, Franz Aguirre: Force Monitoring Tractor. Schlumberger Ipc, September 24, 2009: US20090236101-A1

A downhole tractor assembly that is configured for open-hole applications. The assembly includes a force monitoring mechanism to help monitor and control forces imparted through a drive mechanism of the tractor in real time. As such, damage to open-hole formations due to excessive tractoring forces ...