Tubular grippers and top drive systems

Details Tubular grippers and top drive systems Tubular grippers and top drive systems

2007-11-03

2010-02-23

Gay, Jennifer H (Department: 3676)

Wells

Processes

Disassembling well part

C166S077510, C173S164000, C294S086100, C294S086150, C081S057330

Reexamination Certificate

active

07665530

ABSTRACT:
A tubular gripping system and a top drive drilling system with such a tubular gripping system, in at least some aspects, the gripping system beneath the top drive unit and, in at least some aspects, the gripping system having a body with four spaced-apart grippers movably connected thereto and piston/cylinder devices movably interconnected with each gripper for moving the grippers to clamp the tubular.

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PCT/GB2007/050691: Int'l Search Report; 4pp. (Counterpart of U.S. Appl. No. 11/982,844).
PCT/GB2007/050691: Written Opinion of Int'l Searching Authority: 6pp.

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