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:
Feb. 21, 2012
Filed:
Sep. 08, 2009
Adam D. Wright, McKinney, TX (US);
Vincent P. Zeller, Flower Mound, TX (US);
Harold W. Nivens, Runaway, TX (US);
Roger L. Schultz, Ninnekah, OK (US);
Adam D. Wright, McKinney, TX (US);
Vincent P. Zeller, Flower Mound, TX (US);
Harold W. Nivens, Runaway, TX (US);
Roger L. Schultz, Ninnekah, OK (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A safety valve system includes a safety valve having an actuator and a line connected to the actuator. The safety valve is operable by opening the line in the well, with the line being free of any connection to a surface control system. Another safety valve system includes multiple safety valves. An actuator of each safety valve is connected to an actuator of another safety valve via a line. A biasing force in each of the actuators is operative to close the respective one of the safety valves in response to opening of the line. The biasing force is produced at least in part by hydrostatic pressure in a well.