E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/1
E21B 47/00 (2006.01) E21B 34/10 (2006.01) E21B 43/25 (2006.01) E21B 47/06 (2006.01) E21B 47/10 (2006.01) E21B 49/08 (2006.01)
Patent
CA 1228802
ABSTRACT There is disclosed an operating assembly for a downhole tool, comprising a chamber filled with fluid; a pressure transfer device acting on the fluid; a double-acting piston disposed in the chamber between the ends thereof; and a longitudinal fluid bypass channel associated with the piston and extending between the ends thereof. The assembly also comprises a first and second check valve associated with said fluid bypass channel; a first and second valve seats respectively associated with the first and second check valve; a evils adapted to bias each of the check valves against its associated valve seat; and longitudinally spaced first and second stops adapted to respectively push upon contact therewith said first and second check valves away from their respective valve seats.
528673
Company Halliburton
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
LandOfFree
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