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| Number | Title | Issue Date |
| 6638024 | Hydraulic air compressor system--employing a body of fluid to provide compression A gas compression system including a body of fluid and a down pipe. A first end of the down pipe is positioned to receive a fluid from a source above a surface of the body of fluid and a second end is positioned at a lower level of the body of fluid. A ga... | 10/28/2003 |
| 4913631 | Turbine-driven rotary pump The invention relates to a motor-driven pump intended for the pumping of liquids and driven by a pressurized motive fluid. The motor-driven pump (1) has a rotary sleeve (12) mounted in line between two stationary connections (8, 10). Mounted on the periph... | 04/03/1990 |
| 4405291 | Downhole double acting pump A down hole pump operated by gas in which the fluid in the production conduit may first be gas lifted. The exhaust gas from the pump aerates the well fluids in the production conduit. The pump is controlled by a valve whose operation is in turn controlled... | 09/20/1983 |
| 4003678 | Fluid operated well turbopump A fluid operated turbopump, suitable for use in an oil well pumping system, is structurally adapted as either a hydraulically insertable and removable unit or as a permanent attachment to a bottom hole tubing. The turbopump has axially spaced rotary drivi... | 01/18/1977 |
| 3963377 | Pneumatically powered pump system Disclosed is a pumping system using a pneumatically powered, submerged pump for lifting high viscosity oil from a well. The pump includes a flexible, bag-shaped expansible member or "bladder" mounted within a surrounding housing. Pressurized gas is suppli... | 06/15/1976 |
