Full flow bypass valve

Details Full flow bypass valve Full flow bypass valve

E - Fixed Constructions

21

B

166/43

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

Patent

CA 1076955

FULL FLOW BYPASS VALVE Abstract of the Disclosure A full flow bypass valve comprising mutually telescoping inner mandrel and outer housing members with hydraulic impedance means therebetween to pro- vide a predetermined time delay when the members are relatively telescoped in a first direction and to provide substantially unrestricted relative tele- scoping movement between the members in the opposite direction. A valve mechanism provides simultaneous closure of bypass ports through the wall of the housing member when the mandrel and housing members reach full telescopic contraction. Pressure respon- sive means are provided for maintaining the bypass valve in a closed position regardless of internal or external pressures applied thereto.

298172

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