Schlumberger Technology Corporation

Robin A Ewan

Todor K Sheiretov

Matthew Edward Billingham

Benoit A Foubert

Franz Aguirre

Carl J Roy

Falk W Doering

Dwight C Chilcoat

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.

Self-anchoring device with force amplification

Apparatus, system and methods useful for controlling the traction of a downhole tractor in a borehole include the capability of repeatedly adjusting the normal force applied to at least one component that causes movement of the tractor in the borehole.

Traction control for downhole tractor

Growing community of inventors

Stafford, TX, United States of America

Robin A Ewan