High pressure multistage centrifugal pump for fracturing hydrocarbon reserves
AssigneeNexen Energy Ulc
InventorsDana Pettigrew, Wojciech A. Limanowka, Zoran Vukadin
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Abstract
The present invention relates to a multistage centrifugal pump design, which has the diffusers, impellors, and a shaft, inserted within a high pressure housing, such that this assembly is fully enclosed within the housing, and the housing is of sufficient strength to be suitable for safe pressure containment of the fluids being pumped. This invention describes the technical details used to reconfigure the multistage centrifugal pump design to increase the discharge pressure capabilities higher than the 6,000 psig of current designs.
Claims12
A multiple stage centrifugal pump for fracturing hydrocarbon deposits comprising;
- a pump housing for primary pressure containment,
- a housing seal located between a pump base and a pump head, and being a metal on metal type seal utilizing threads,
- diffusers having openings to allow rapid pressure equalization across a diffuser outside edge to avoid failure from high differential pressure, each said diffuser having a seal located on an outside of each of the diffusers to prevent pressure communication and fluid flow between the outsides of the individual diffusers enclosed within the housing, wherein pump connections for pump intake and discharge include ring or gasket sealing, and wherein said pump delivers the discharge pressure or differential pressure between the pump internal and external pressure of up to substantially 10,000 psi or over.
A multistage centrifugal pump assembly comprising:
- diffusers, impellers, and a shaft, inserted within a high pressure housing, said assembly being fully enclosed within the housing, and the housing being of sufficient strength for pressure containment of fluids being pumped and to enable increase of discharge pressure capabilities to greater than 6,000 psi discharge pressure thereby providing pressures suitable for fracturing formations penetrated by wellbores.
Dependencies are inferred from the claim text.