Device for positioning equipment

Details Device for positioning equipment Device for positioning equipment

E - Fixed Constructions

21

B

E21B 19/00 (2006.01) B66F 3/06 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2108865

A device (1) for position a tong comprises a flexible chain (2) provided with compression members (7) and a flexible locking chain (3). When a hydraulic motor (14) is rotated anti-clockwise the chains (2,3) are brought into operative engagement to form a rigid member (4) which is secured to a ball (29) on the drilling derrick. A tong is suspended from the device (1) which, in turn, is suspended from a cable (27) secured high in the derrick. The tong can be advanced or withdrawn towards a pipe string by rotating the motor (14) anti-clockwise or clockwise to extend or dismantle the rigid member (4) as desired.

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