The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2002
Filed:
Nov. 22, 2000
Applicant:
Inventors:
Terry W. Shafer, Broken Arrow, OK (US);
Joe V. Henry, Claremore, OK (US);
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 3/500 ; F04B 1/700 ; F04B 3/00 ; F01D 1/02 ; F03B 1/04 ;
U.S. Cl.
CPC ...
F04B 3/500 ; F04B 1/700 ; F04B 3/00 ; F01D 1/02 ; F03B 1/04 ;
Abstract
An electrical submersible well pump assembly has an inducer and diffuser for applying a positive pressure to the first pump stage. The pump assembly includes a centrifugal pump with a housing having a well fluid inlet and a number of pump stages. Each pump stage has an impeller and a diffuser. An inducer is mounted in the housing upstream of the impeller of the first pump stage. The inducer has a helical flight that is rotatable in unison with the pump. A diffuser is positioned between the inducer and the impeller of the first stage.