Rotary piston well tool

Details Rotary piston well tool Rotary piston well tool

1993-10-25

1994-12-20

Dang, Hoang C.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166104, 1661177, E21B 2300

Patent

active

053738985

ABSTRACT:
A well tool having an elongate circular body with an enclosed fluid bore extending longitudinally therethrough. A fixed plate extends radially between the bore and the body and a rotatable piston extends between the enclosed bore and the body and is rotatable about the enclosed bore. A hydraulic control line extends longitudinally to a position between the plate and the piston for rotating the piston. The tool may be an orientation tool and include a rotatable mandrel actuated by the piston. A recocking spring is provided recocking the piston and valve means are provided in the hydraulic line for admitting and venting fluid from the piston.

REFERENCES:
patent: 3405771 (1968-10-01), Carr et al.
patent: 4286676 (1981-09-01), Nguyen et al.
patent: 4448254 (1984-05-01), Barrington
patent: 4862958 (1989-09-01), Pringle
patent: 5133404 (1992-07-01), Dollison
patent: 5156223 (1992-10-01), Hipp

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