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. 02, 2019
Filed:
Jun. 09, 2015
Applicant:
Expro North Sea Limited, Dyce, Aberdeenshire, GB;
Inventors:
Assignee:
Expro North Sea Limited, Aberdeen, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/06 (2006.01); E21B 34/04 (2006.01); E21B 34/02 (2006.01); E21B 41/00 (2006.01); E21B 17/01 (2006.01);
U.S. Cl.
CPC ...
E21B 34/045 (2013.01); E21B 17/01 (2013.01); E21B 33/063 (2013.01); E21B 34/02 (2013.01); E21B 34/04 (2013.01); E21B 41/0014 (2013.01);
Abstract
A landing string includes a valve having a valve member mounted within a flow path extending through the landing string, and a valve control system for use in operating the valve to move the valve member between open and closed positions to control flow along the flow path. The valve control system is reconfigurable between a first configuration in which the valve is operated or controlled under a fail-as-is (FAI) mode of operation, and a second configuration in which the valve is operated or controlled under a fail-close (FC) mode of operation.