Drill rig mast structure

Details Drill rig mast structure Drill rig mast structure

1983-02-22

1984-08-14

Olszewski, Robert P.

Tool driving or impacting

With vehicle support for drive

Drive structure moved to nonuse position for transport

173 44, 52116, E21B 702

Patent

active

044651449

ABSTRACT:
The invention relates to a mobile drilling rig providing a rotation head which is small enough to fit between the mast members of the rig. Arrangements are made to pivot back the rotation head to give access to the drill line of the rig. The mast members can be pivotted on a frame to place them into the drilling and travelling position respectively.

REFERENCES:
patent: 2179316 (1939-11-01), Anderson
patent: 2194066 (1940-03-01), Caldwell
patent: 2803434 (1957-08-01), Heinish
patent: 3158213 (1964-11-01), O'Neil et al.
patent: 3205627 (1965-09-01), Gyongyosi
patent: 3438450 (1969-04-01), Failing
patent: 3576218 (1971-04-01), Lisenby
patent: 3708024 (1973-01-01), Back
patent: 3766991 (1973-10-01), Brown
patent: 3778940 (1973-12-01), Blecken
patent: 3815690 (1974-06-01), Cooper
patent: 3992831 (1976-11-01), Bakovitz et al.
patent: 4126193 (1978-11-01), Brown et al.
patent: 4393944 (1983-07-01), Gugger et al.

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