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:
Aug. 18, 2020
Filed:
Feb. 03, 2016
Applicant:
National Oilwell Varco, L.p., Houston, TX (US);
Inventor:
Timothy S. Steffenhagen, Fort Worth, TX (US);
Assignee:
NATIONAL OILWELL VARCO, L.P., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/06 (2006.01); F15B 13/08 (2006.01); F15B 21/04 (2019.01); F15B 21/045 (2019.01); E21B 34/02 (2006.01); E21B 34/16 (2006.01);
U.S. Cl.
CPC ...
F15B 21/045 (2013.01); E21B 33/061 (2013.01); E21B 33/063 (2013.01); E21B 34/02 (2013.01); E21B 34/16 (2013.01); F15B 13/0839 (2013.01);
Abstract
A flow responsiveness enhancer apparatus may include a stack of manifolds with at least one manifold dedicated to each of the rams of the blowout preventer. The flow responsiveness enhancer includes a shared pressure line coupled to each of the manifolds, and a shared tank line coupled to each of the manifolds. Each manifold can include a 4-way directional valve that is piloted by the pressure levels in a pair of input ports. Each 4-way directional valve can couple the shared pressure line and the shared tank line to a pair of output ports.