Gripper assembly for downhole tools

Details Gripper assembly for downhole tools Gripper assembly for downhole tools

2007-03-20

2007-03-20

Dang, Hoang (Department: 3672)

Wells

Expansible anchor or casing

Fluid pressure actuated

C166S213000, C166S217000, C175S099000, C175S230000

Reexamination Certificate

active

11418438

ABSTRACT:
A gripper assembly for anchoring a tool within a downhole passage and for possibly assisting movement of the tool within the passage. The gripper assembly includes an elongated mandrel and flexible toes that can be radially displaced to grip onto the surface of the passage. The toes are displaced by the interaction of a driver slidable on the mandrel and a driver interaction element on the toes. In one embodiment, the toes are displaced by the interaction of rollers and ramps that are longitudinally movable with respect to one another. In another embodiment, the toes are displaced by the interaction of toggles that rotate with respect to the toes.

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Applicant's Supplemental IDS filed Feb. 17, 2004 in parent U.S.Appl. No. 10/690,054 that describes a gripper design disclosed on p. 6, lines 4-17 of the application.
U.S. Appl. No. 60/201,353, and cover sheet, filed May 2, 2000 entitled “Borehole Retention Device” in 24 pages.
U.S. Appl. No. 60/201,353, and cover sheet, filed May 2, 2000 entitled “Borehole Retention Device” in 24 pages.

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