Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1979-05-04
1981-05-19
Bell, J. Karl
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
212267, B66C 2306
Patent
active
042676754
ABSTRACT:
Disclosed is a rig for working on wells, and including a generally two-legged mast, with each leg constructed with a traveling pole telescoping about and along a gin pole. The mast may be so extended by means of a chain drive mounted on the traveling legs of the mast. Hydraulically-operated slips selectively lock each traveling leg to the respective gin pole to prevent the former from sliding down the latter. The mast may be lowered to, and raised from, a generally horizontal configuration for transport on a truck. A snubber, or other pipe gripping apparatus, may be suspended by the mast and folded under the mast as the mast is moved to a horizontal configuration. With the mast erect, a control console may be elevated by means of a winch line supported by the mast. The mast may be mounted on a skid carried by a truck, with the skid movable relative to the truck bed for the purpose of aligning the mast relative to a well.
REFERENCES:
patent: 2993570 (1961-07-01), Bender
patent: 3016992 (1962-01-01), Wilson
patent: 3622013 (1971-11-01), Swanson et al.
Bell J. Karl
Brown Joe R.
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