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:
May. 14, 2019
Filed:
Jul. 11, 2016
Applicant:
Hydril Usa Distribution Llc, Houston, TX (US);
Inventors:
Eric Dale Larson, Houston, TX (US);
Brian Scott Baker, Houston, TX (US);
Assignee:
HYDRIL USA DISTRIBUTION LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/06 (2006.01); E21B 29/12 (2006.01); E21B 7/12 (2006.01); F15B 15/26 (2006.01); F16K 17/36 (2006.01); F15B 21/04 (2006.01); F16D 31/02 (2006.01); E21B 34/04 (2006.01);
U.S. Cl.
CPC ...
E21B 33/062 (2013.01); E21B 33/061 (2013.01); E21B 33/063 (2013.01); E21B 34/04 (2013.01);
Abstract
A blowout preventer (BOP) includes a pressure driven operator that is equipped with a balancing circuit to offset pressure inside the BOP. The operator, which is used to drive a ram, includes a piston, coupled to the ram by an operator arm, and a balance arm on a side of the piston opposite the operator arm. Pressure from inside the BOP communicates to an end of the balance arm opposite the piston and exerts a force to drive the ram radially inward.