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:
Jan. 13, 2004
Filed:
Mar. 05, 2002
Applicant:
Inventor:
Alan Lin Kao, Tulsa, OK (US);
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 2/924 ;
U.S. Cl.
CPC ...
F04D 2/924 ;
Abstract
A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter balance holes that typically range between 45% to 100% of the width between each split vane. The gas-handling centrifugal pump can be used as a charge pump for a centrifugal pump in a lower tandem configuration within a well.