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:
Dec. 25, 2018
Filed:
Oct. 20, 2017
Halliburton Energy Services, Inc., Houston, TX (US);
Thomas John Gottschalk, Houston, TX (US);
Wesley John Nowitzki, Tulsa, OK (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
Centrifugal pump sealing surfaces are described. A multi-stage centrifugal pump includes an impeller between a first diffuser and a second diffuser, a plurality of sealing surfaces formed by at least one diffuser inlet ring of the first diffuser interspersed between at least two concentric balance rings of the impeller, and at least one annular diffuser exit skirt of the second diffuser interspersed between at least two concentric annular skirts of the impeller. A multi-stage centrifugal pump includes an impeller including a plurality of concentric annular impeller sealing surfaces mated to a plurality of concentric annular diffuser sealing surfaces, the diffuser sealing surfaces extending toward the impeller from a diffuser stacked adjacent to the impeller, wherein the impeller sealing surfaces and the diffuser sealing surfaces interlock to form a plurality of tight clearances and a tortuous leak path for well fluid lifted by the centrifugal pump.