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:
Apr. 04, 2017
Filed:
Mar. 01, 2013
Applicant:
National Oilwell Varco, L.p., Houston, TX (US);
Inventor:
Lane McCaskill, Houston, TX (US);
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 47/08 (2006.01); E21B 34/02 (2006.01); F16K 3/24 (2006.01);
U.S. Cl.
CPC ...
F16K 47/08 (2013.01); E21B 34/02 (2013.01); F16K 3/246 (2013.01);
Abstract
A choke with reduced cavitation and/or flashing due to a high pressure fluids passing through the choke includes a housing having a high pressure inlet port and a low pressure outlet port, and a cage positioned within the housing and having a passage for passing fluid therethrough. A plurality of beads are each positioned in the cage, such that fluid flows between the cage and the beads and between the beads when passing through the cage. Fluid pressure is reduced by the fluid passing through the cage, thereby reducing cavitation.