Tool for treating subterranean wells

Details Tool for treating subterranean wells Tool for treating subterranean wells

1989-12-08

1991-06-04

Neuder, William P.

Wells

Packers or plugs

Expanded by confined fluid from central chamber, pump or...

166250, 166334, E21B 3324, E21B 3327, E21B 3412

Patent

active

050205927

ABSTRACT:
A method and apparatus for treating subterranean wells includes a tool supported on a one-piece support tube which operates to raise and lower the tool in the well to a position where well treatment is required. The tool provides inflatable packers and a selector valve operable in a first position to inflate or deflate the packers, in a second position to circulate fluid to spot treatment fluid at the tool, and a third position for injecting treatment fluid into the strata isolated from the remainder of the well by the packers. The tool provides a J-lock system and a time delay dashpot which cooperate to permit an operator at the well head to selectively operate the valve between the three positions solely by adjusting the weight on the support tube at the well head.

REFERENCES:
patent: 3627046 (1971-12-01), Miller et al.
patent: 4286661 (1981-09-01), Gazda
patent: 4579174 (1986-04-01), Barrington
patent: 4585061 (1986-04-01), Lyons, Jr., et al.
patent: 4653588 (1987-03-01), White
patent: 4671352 (1987-06-01), Magee, Jr., et al.
patent: 4694908 (1987-09-01), Morris et al.
patent: 4711301 (1987-12-01), Stringfellow
patent: 4776396 (1988-10-01), Studholme
patent: 4869324 (1989-09-01), Holder

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