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. 17, 2014
Filed:
Mar. 10, 2011
Padmasiri Daya Seneviratne, Fullerton, CA (US);
Lawrence E. Wells, Yorba Linda, CA (US);
Arthur W. Braman, Cypress, CA (US);
Preston R. Fox, Fountain Valley, CA (US);
Padmasiri Daya Seneviratne, Fullerton, CA (US);
Lawrence E. Wells, Yorba Linda, CA (US);
Arthur W. Braman, Cypress, CA (US);
Preston R. Fox, Fountain Valley, CA (US);
National Oilwell Varco, L.P., Houston, TX (US);
Abstract
An internal blowout preventer used in drilling rigs for the discovery and production of hydrocarbons from the earth is disclosed. The internal blowout preventer has two independently and remotely operable blowout preventer valves in the same body, providing for greater service life and higher reliability during drilling operations. The two valves are loaded into the internal blowout preventer housing from a single end, and are operable by an actuator assembly.