Method and a machine for handling drill pipes

Details Method and a machine for handling drill pipes Method and a machine for handling drill pipes

1983-04-28

1986-04-29

Meister, James M.

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

81 5719, 188 67, E21B 304

Patent

active

045850798

ABSTRACT:
A machine applies screwing and unscrewing torque between successive drill pipes with an essentially vertical axis extending through a tapered opening in a turntable for a well bore. The machine includes a mechanism for applying a high initial unthreading torque and a high final threading torque between successive drill pipes and a mechanism for rapid screwing and unscrewing of successive drill pipes. The machine also includes a clamping mechanism having a bolster and a plurality of shims. The shims have outer portions tapered to fit into the opening of the turntable and have inner portions with a shape corresponding to the shape of the drill pipes. Each shim is supported individually on the bolster by a device that moves the shim into engagement with a drill pipe to grip the same and with sufficient freedom to permit the shims to center the pipe between them automatically. The bolster is lowered to cause the shims to enter the opening in the turntable.

REFERENCES:
patent: 2410589 (1946-11-01), Segelhorst
patent: 2636241 (1953-04-01), Liljestrand
patent: 2814461 (1957-11-01), Martin
patent: 3158213 (1964-11-01), O'Neill et al.
patent: 3194313 (1965-07-01), Fanshawe
patent: 3270389 (1966-09-01), Kingsbury
patent: 3579753 (1971-05-01), Pryor
patent: 3961399 (1976-06-01), Boyadjieff
patent: 4023449 (1977-05-01), Boyadjieff
patent: 4116015 (1978-09-01), Duncan
patent: 4253219 (1981-03-01), Krasnov
patent: 4306339 (1981-12-01), Ward

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