Method and apparatus for producing wells

Details Method and apparatus for producing wells Method and apparatus for producing wells

1990-08-17

1991-09-03

Neuder, William P.

Wells

Processes

Placing or shifting well part

166321, 166332, E21B 3410

Patent

active

050444433

ABSTRACT:
A subsurface slide valve and flapper valve controlled by a single actuator responsive to control pressure from the surface. A shifting tool landable in a landing nipple and in response to pressure in the tubing first extending dogs to contact the actuator and then shifting the dogs downwardly to move the actuator to valve open position.

REFERENCES:
patent: 4063593 (1977-12-01), Jessup
patent: 4105075 (1978-08-01), Helmus
patent: 4566478 (1986-01-01), Denton
patent: 4633952 (1987-01-01), Ringgeberg
patent: 4711305 (1987-12-01), Ringgenberg
patent: 4766960 (1988-08-01), Williamson, Jr.

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