Pumps – Successive stages
Reexamination Certificate
2001-10-03
2004-11-02
Freay, Charles G. (Department: 3746)
Pumps
Successive stages
C417S423500, C417S426000, C417S063000, C415S199100
Reexamination Certificate
active
06811382
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to the pumping of fluids, and particularly to the integration of a pump and electric motor to facilitate various aspects of moving fluid from one location to another.
BACKGROUND OF THE INVENTION
In a variety of pumping systems, such as electric submersible pumping systems utilized in the production of subterranean fluids, a distinct motor is used to drive a distinct and separate pump. In electric submersible pumping systems, a motor is coupled to a motor protector and ultimately to a submersible pump, such as a centrifugal pump. The motor protector separates the internal motor fluid from deleterious wellbore fluids, and the pump is driven by a shaft coupled to the electric motor. A variety of other components can be combined with the electric submersible pumping system for a range of applications and environments.
SUMMARY OF THE INVENTION
The present invention provides a technique for integrating the electric motor and the pump in various pumping systems. This combination permits the elimination of the separate motor, motor protector and other components while allowing greater control over movement of fluid as well as improved flexibility of design. Although the technique has particular application to systems used in subterranean environments, such as electric submersible pumping systems, the technique may be utilized in a variety of other pumping applications.
REFERENCES:
patent: 5209650 (1993-05-01), Lemieux
patent: 5547350 (1996-08-01), Rawal et al.
patent: 5713727 (1998-02-01), Veronesi et al.
patent: 2369862 (2002-12-01), None
Arauz Grigory L.
Buchanan Steven E.
Havlinek Kenneth L.
Kishino Ashley
Lee Lawrence C.
Echols Brigitte Jeffery
Freay Charles G.
Griffin Jeffrey E.
Schlumberger Technology Corporation
Van Someren, PC
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