Pipe snubbing method and apparatus

Details Pipe snubbing method and apparatus Pipe snubbing method and apparatus

1975-10-08

1976-12-28

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

166 77, 175162, 175203, 226150, 226159, 226162, E21B 1900, E21B 1908

Patent

active

039996107

ABSTRACT:
A pipe snubbing apparatus and method which may utilize either the draw works of a conventional rig or a pump to provide power for raising the movable gripping assembly.
The movable gripper is moved downwardly by stored power, such as pressure stored in an accumulator. The rate of movement of the movable gripping assembly may be controlled by controlling flow of fluid to and from a piston and cylinder assembly associated with the movable gripping assembly.

REFERENCES:
patent: 1894912 (1933-01-01), Otis
patent: 2126933 (1938-08-01), Stone et al.
patent: 2555145 (1951-05-01), McKinney
patent: 3096075 (1963-07-01), Brown
patent: 3215203 (1965-11-01), Sizer
patent: 3329327 (1967-07-01), Scribner
patent: 3602413 (1971-08-01), Montesson et al.
patent: 3797570 (1974-03-01), Leutwyler

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