Wells – Above ground apparatus – With means facilitating connecting or disconnecting...
Patent
1985-04-01
1986-12-02
Novosad, Stephen J.
Wells
Above ground apparatus
With means facilitating connecting or disconnecting...
166 85, 175 85, 173164, E21B 1920
Patent
active
046257969
ABSTRACT:
Apparatus for use during connection of a length of pipe to the upper end of a drill string, preferably in a top drive drilling arrangement, and including a back-up tool for retaining the upper end of the drill string against rotation as the added length of pipe is connected threadedly thereto. This back-up tool is mounted for movement between an active position for engaging and holding the upper end of the drill string and a laterally retracted position. A stabbing unit associated with the back-up tool acts to locate the additional length of pipe while it is connected to the string, and is mounted for movement with the back-up tool between the active and inactive positions of the latter, and also for movement relative to the back-up tool, in the active position of that tool, between an extended position for engaging and holding the additional length of pipe at a location offset laterally with respect to the back-up tool and a stabbing position locating the additional length of pipe in alignment with the back-up tool for connection to the string.
REFERENCES:
patent: 2450934 (1948-10-01), Calhoun
patent: 3061011 (1962-10-01), Paget
patent: 3312294 (1967-04-01), Wilson
patent: 3351585 (1967-07-01), Dubberke
patent: 3464507 (1969-09-01), Alexander et al.
patent: 4421179 (1983-12-01), Boyadjieff
patent: 4437524 (1984-03-01), Boyadjieff et al.
patent: 4449596 (1984-05-01), Boyadjieff
patent: 4458768 (1984-07-01), Boyadjieff
patent: 4489794 (1984-12-01), Boyadjieff
Green William P.
Letchford John F.
Novosad Stephen J.
Varco International, Inc.
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