Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1984-12-07
1987-02-24
Leppink, James A.
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166318, 166386, 175234, 175237, 175317, 175324, E21B 2110, E21B 3414
Patent
active
046450068
ABSTRACT:
An annulus access valve system having a plurality of valves installed in, and forming a part of, a drill string in a well bore whereby fluid may be pumped into the annulus through the valves individually or in combination as desired. Each valve has a valve body connected to the drill string in which defines a longitudinal opening therethrough and a transverse port therein interconnecting the longitudinal opening with the annulus. A longitudinally slidable valve seats on a replaceable valve seat defining a closed position of the transverse port in the valve. The valve sleeve is biased in the closed position by a spring. An actuator, uniquely sized for a specific valve in the drill string, is utilized to engage the valve sleeve and move it to an open position by hydraulic pressure applied thereabove so that fluids may be pumped down the drill string through the transverse port into the annulus. A flow control valve is positioned in the actuator so that some fluid may be directed therebelow as desired. A method of utilizing the annulus access valve system for preventing blowouts in wells is disclosed, along with other methods of use.
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Dang Hoang C.
Leppink James A.
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