Oil well testing valve with liquid spring

Details Oil well testing valve with liquid spring Oil well testing valve with liquid spring

1977-10-27

1978-08-29

Leppink, James A.

Wells

Valves, closures or changeable restrictors

137DIG7, 166321, 251 62, E21B 4312

Patent

active

041097246

ABSTRACT:
A testing valve and its method of operation is disclosed for use in testing an oil well formation wherein the valve includes a liquid spring and operating means for operating the valve responsive to changes in the well annulus pressure. Volume adjusting mechanisms are also disclosed for compensation for a change in the volume of liquid as the valve is subjected to pressure and temperature gradients of the well as the tool is lowered in a well to testing depth.

REFERENCES:
patent: 3431985 (1969-03-01), Bowen
patent: 3664415 (1972-05-01), Wray et al.
patent: 3782461 (1974-01-01), Watkins
patent: 3786865 (1974-01-01), Tausch et al.
patent: 3786866 (1974-01-01), Tausch et al.
patent: 3842913 (1974-10-01), Mott
patent: 3850250 (1974-11-01), Holden et al.
patent: 3856085 (1974-12-01), Holden et al.
patent: 3870104 (1975-03-01), Mott
patent: 3915228 (1975-10-01), Giebeler

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