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:
Jan. 16, 2018
Filed:
Jun. 27, 2014
Applicant:
Mhwirth As, Kristiansand, NO;
Inventor:
Dag Vavik, Kristiansand, NO;
Assignee:
MHWIRTH AS, Kristiansand, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 34/04 (2006.01); E21B 21/00 (2006.01); E21B 21/08 (2006.01); E21B 17/01 (2006.01);
U.S. Cl.
CPC ...
E21B 34/04 (2013.01); E21B 17/01 (2013.01); E21B 21/001 (2013.01); E21B 21/08 (2013.01);
Abstract
A deep water drilling riser pressure relief system includes a drilling riser extending from a surface down to a BOP stack arranged subsea. The drilling riser comprises a drilling riser slip joint, an annular preventer arranged below the drilling riser slip joint, and at least one pressure relief device arranged in a lower part of the drilling riser. The at least one pressure relief device is configured to open so as to discharge a fluid from the drilling riser to the sea if a pressure difference between an inside and an outside of the drilling riser exceeds a predetermined threshold.