Dual swing-up elevator well drilling apparatus

Details Dual swing-up elevator well drilling apparatus Dual swing-up elevator well drilling apparatus

1982-02-22

1984-09-18

Murtagh, John E.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52741, B66C 2362, E04B 100

Patent

active

044715870

ABSTRACT:
A well drilling apparatus includes a first swing-up elevator platform on which the mast structure is pivotally mounted. After the mast structure has been raised to its erect position, the first elevator platform is elevated to carry the mast structure to a high operational level. A second swing-up elevator platform is provided to carry the drawworks to the same high level at which the two elevator platforms are coupled together to form the working floor. All of the raising and elevating operations can be accomplished with power supplied by the drawworks. The elevator platforms may be lowered after the drilling operation has been accomplished without interfering with any control valve structures that have been placed on the wellhead while the structure was at its raised operational level; the swing-up elevator platforms swing down in opposite directions over any such valve structure.

REFERENCES:
patent: 3228151 (1966-01-01), Woolslayer et al.
patent: 3262237 (1966-07-01), Jenbins et al.
patent: 3483933 (1969-12-01), Dyer et al.
patent: 3494593 (1970-02-01), Blogg
patent: 3749183 (1973-07-01), Brahnham et al.
patent: 3803780 (1974-04-01), Donnally
patent: 3807109 (1974-04-01), Jenkins et al.
patent: 3922825 (1975-12-01), Eddy et al.
patent: 4375241 (1983-03-01), Gallon
Dreco "Slingshot" brochure, on front cover indicates patent pending, 1980.

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