Temperature compensated sleeve valve hydraulic jar tool

Details Temperature compensated sleeve valve hydraulic jar tool Temperature compensated sleeve valve hydraulic jar tool

E - Fixed Constructions

21

B

255/29

E21B 17/02 (2006.01) E21B 31/113 (2006.01)

Patent

CA 1107714

TEMPERATURE COMPENSATED SLEEVE VALVE HYDRAULIC JAR TOOL Abstract of the Disclosure A hydraulic jarring tool includes a temperature compensated hydraulic detent actuation means. The jarring tool includes an outer member and an inner member tele- scopically arranged. Spline means between said outer member and said inner member transmit torque. A hammer and anvil system provide a jarring effect upon actuation of the tool. An upper seal and lower seal provide a fluid seal between said outer member and said inner member. A working fluid is maintained in a working fluid chamber between the upper and lower seals. The hydraulic detent actuation means provides a tripping action to produce the jarring effect. The hydraulic detent actuation includes a sliding sleeve member with an orifice passage that produces a detent action by the slow metering of the hydraulic working fluid. A valve means is positioned in the orifice passage for providing a consistent flow through the sleeve valve to produce the hydraulic detent irrespective of the temperature of the working fluid.

333871

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