Oil well testing valve with liquid spring

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

E - Fixed Constructions

21

B

166/5

E21B 43/12 (2006.01) E21B 34/10 (2006.01) E21B 49/00 (2006.01)

Patent

CA 1086220

ABSTRACT A testing valve and its method of operation is dis- closed 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 tempera- ture gradients of the well as the tool is lowered in a well to testing depth. -1-

311428

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