Material or article handling – Well pipe or rod racking mechanism – With slope change
Patent
1981-04-30
1984-04-24
Spar, Robert J.
Material or article handling
Well pipe or rod racking mechanism
With slope change
254106, 294 88, 414745, E21B 1900
Patent
active
044445369
ABSTRACT:
Disclosed is a rig for working on wells, and including a pair of continuous chains for moving a pair of pipe holders along a mast. Each of the two pipe holders is fixed to a point in each chain. The chains are driven along parallel paths by twin motors with linked drive shafts. The motors are mounted on the top of the mast so that only one side of the closed loop on each chain is loaded when the pipe is being pulled from a well. One of the pipe holders may comprise a snubbing head which may be operated in reciprocal motion for high speed snubbing of pipe into a well.
REFERENCES:
patent: 2867338 (1959-01-01), Simmonds
patent: 3096075 (1963-07-01), Brown
patent: 3265138 (1966-08-01), Alexander et al.
patent: 3610503 (1971-10-01), Pryor
patent: 3759147 (1973-09-01), Johnsson et al.
patent: 3797570 (1974-03-01), Leutwyler
patent: 3999610 (1976-12-01), Sage
patent: 4332062 (1982-06-01), Byrne, Jr.
patent: 4348044 (1982-09-01), Wood
Spar Robert J.
Underwood Donald W.
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