Wells – Processes – Producing the well
Patent
1996-08-06
1998-09-15
Neuder, William P.
Wells
Processes
Producing the well
137155, 13759618, 417143, F04F 106
Patent
active
058065989
ABSTRACT:
An apparatus for supplying and venting gas to a downhole accumulation chamber that includes a supply valve having an open supply position to supply gas to the chamber and a closed supply position, a vent valve having an open vent position to vent gas from the chamber and a closed vent position, and an actuator communicating with a source of pressurized fluid at the surface for actuating the supply and vent valves. The actuator moves the supply valve to the open position and the vent valve to the closed position, and alternately moves the vent valve to the open vent position and the supply valve to the closed supply position. The actuator may include a single hydraulically actuated reciprocating member or a pair of hydraulically actuated reciprocating members. When a pair of reciprocating members is utilized and the apparatus is used in connection with a tubing string having a flowbore, the hydrostatic pressure from the tubing string flowbore may be utilize to provide pressure on one side of each reciprocating member. The apparatus may also include biasing members for biasing each valve to either the open or closed position.
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