Downhole tool with compressible liquid spring chamber

Details Downhole tool with compressible liquid spring chamber Downhole tool with compressible liquid spring chamber

E - Fixed Constructions

21

B

166/41

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

Patent

CA 1271131

Abstract Of The Disclosure A downhole tool such as a tester valve originally constructed to operate with a compressible gas spring may be modified to operate with a compressible liquid spring. The volume of a spring chamber is increased. A differential area of s power piston is decreased. A flow restriction is a metering cartridge associated with the spring chamber is increased. Also, a relief valve is provided to allow fluid to be relieved from the tool into the well annulus upon expansion of the compressible liquid due to heating is the tool is lowered into a well if the expansion of liquid exceeds the available volume in the tool.

521585

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