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:
Dec. 18, 2018
Filed:
Sep. 18, 2014
Schlumberger Technology Corporation, Sugar Land, TX (US);
Jason Michael Kamphaus, Missouri City, TX (US);
Eric Lovie, Singapore, SG;
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
Pressure relief systems for gas lift valves and mandrels are provided. In an implementation, a gas lift barrier mandrel includes two gas lift valves in series fluid communication. When fluid becomes confined between the two gas lift valves, an expansion volume is provided in one of the gas lift valves for pressure relief of the confined fluid, beginning at a pressure threshold value. The pressure relief may be mediated by a pressure-activated device, a piston, a spring, or a bellows to regulate the expansion of confined pressure. In an implementation, one of the gas lift valves may include a pressure relief valve to vent confined pressure from the gas lift valve to the production tubing or casing annulus. A check valve may be added in series with the pressure relief valve within the gas lift valve to prevent backflow through the pressure relief valve.