Mohammad A Amani

US Patent:

6691787, Feb 17, 2004

Filed:

Oct 11, 2001

Appl. No.:

09/975811

Inventors:

Mohammad Amani - Houston TX

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 3400

US Classification:

166377, 166378, 166372, 166105, 166322

Abstract:

The present invention generally provides a gas operated pump having a removable and insertable valve. In one aspect, the invention includes a pump housing having a fluid path for pressurized gas and a second fluid path for exhaust gas. The fluid paths are completed when the valve is inserted into a longitudinal bore formed in the housing.

US Patent:

58065989, Sep 15, 1998

Filed:

Aug 6, 1996

Appl. No.:

8/692592

Inventors:

Mohammad Amani - Houston TX

International Classification:

F04F 106

US Classification:

166372

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.