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US 4,818,197 AGranted
Progessive cavity pump
AssigneeHalliburton Company
InventorJames W. Mueller
Life of this patent
Estimating the term…
Abstract
A progressive cavity pump capable of operating at both high and low system pressures. The pump includes a housing with an elastomeric stator disposed therein. A rotor is rotatably and pumpingly disposed in a pumping chamber defined by the stator. A support member is disposed annularly between inner and outer portions of the stator, and the member bears longitudinally against an annular end portion of the stator and a facing annular shoulder in the housing such that deformation of the stator is prevented when high inlet pressures are present.
Claims7
A progressive cavity pump comprising:
- a first housing portion defining an inlet therethrough;
- a second housing portion attachable to said first housing portion and defining an outlet therethrough;
- a substantially elastomeric stator comprising:
- an outer portion removably attached to said first and second housing portions having a first end and a second end spaced from said first end;
- an inner portion defining a pumping chamber therethrough and having a first end and a second end spaced from said first end of said inner portion;
- and
- an annular end portion interconnecting said first ends of said outer and inner portions;
- a rotor disposed in said inner portion of said stator and extending through said pumping chamber for pumping fluid from said inlet to said outlet in response to rotation of said rotor;
- and
- an elongated member disposed in said housing portions and generally annularly between said inner and outer portions of said stator and longitudinally between said annular end portion of said stator and a portion of said second housing portion, said member being removable from said housing portions and separable from said stator.
7 more elements
Dependencies are inferred from the claim text.