Annulus pressure operated closure valve with improved reverse ci

Details Annulus pressure operated closure valve with improved reverse ci Annulus pressure operated closure valve with improved reverse ci

1980-01-15

1982-01-19

Pate, III, William F.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166317, 166321, 166332, 137 68R, 251 58, C21B 3408

Patent

active

043111971

ABSTRACT:
A testing apparatus for use in an oil well includes an improved circulation valve having a cylindrical housing with an open bore therethrough and a circulating port through a wall thereof. A valve mandrel is slidably received in the housing and movable from a closed position closing said circulating portion to an open position opening said circulating port. A shear pin is provided between the valve mandrel and the cylindrical housing and initially retains the valve mandrel in its closed position. The valve mandrel is arranged and constructed for engagement with a power mandrel of the testing apparatus upon movement of the power mandrel in a first direction so that said valve mandrel is forced in said first direction by engagement with said power mandrel and said shear pin is sheared to release the valve mandrel from its closed position. A biasing spring is provided for aiding movement of the valve mandrel to its open position upon shearing of the shear pin. An improved drain valve is also provided for such a testing apparatus.

REFERENCES:
patent: 3130789 (1964-04-01), Alexander et al.
patent: 3388745 (1968-06-01), Cole
patent: 3970147 (1976-07-01), Jessup et al.
patent: 4063593 (1977-12-01), Jessup
patent: 4064937 (1977-12-01), Barrington

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