Device for positioning equipment

Details Device for positioning equipment Device for positioning equipment

1993-10-19

1994-11-29

Buiz, Michael Powell

Boring or penetrating the earth

With above-ground means to feed tool

E21B 700

Patent

active

053681134

ABSTRACT:
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 The tong can be advanced or withdrawn towards a pipe string by rotating the motor (14) anti-clockwise or clockwise to extend or dismantle the rigid member (4) as desired.

REFERENCES:
patent: 3883009 (1975-05-01), Swoboda, Jr. et al.
patent: 4077525 (1978-03-01), Callegari et al.
patent: 4274777 (1981-06-01), Scaggs
patent: 4629014 (1986-12-01), Swisher et al.
patent: 4735270 (1988-04-01), Fenyvesi
patent: 4971162 (1990-11-01), Back
"Rigid Pushing Chains," Serapid USA, Inc., 1992.

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