Self-anchoring device with force amplification

Details Self-anchoring device with force amplification Self-anchoring device with force amplification

2009-03-03

2010-12-21

Stephenson, Daniel P (Department: 3676)

Wells

Grapple and well anchored lifting means

C166S301000

Reexamination Certificate

active

07854258

ABSTRACT:
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.

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