Centrifugal pump with screw pump accelerator

Details Centrifugal pump with screw pump accelerator Centrifugal pump with screw pump accelerator

2008-09-02

2008-09-02

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural rigidly related blade sets

C415S071000, C415S118000, C415S199300, C415S199400, C415S199600

Reexamination Certificate

active

10907485

ABSTRACT:
Method and apparatus for pumping drilling fluid (mud) containing drill cuttings, comprising a centrifugal pump with screw pump accelerator. The screw pump creating positive pressure for centrifugal pump inlet to increase performance. The screw pump mud level fluctuations are compensated by the vertical screw pumping unit. Adjusting the elevation of pump will adjust the quantity of mud pumping, which is not possible with ether one pump alone. Air is allowed to mix with the mud in the centrifugal pump to create air bubbles to decrease density of the mixture and decrease the head pressure.

REFERENCES:
patent: 718557 (1903-01-01), Wenzel
patent: 1711045 (1929-04-01), Davis
patent: 2857081 (1958-10-01), Lung
patent: 4531892 (1985-07-01), Nasman et al.
patent: 4884943 (1989-12-01), Niskanen
patent: 4976586 (1990-12-01), Richter et al.
patent: 6960061 (2005-11-01), Wagner

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