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. 13, 2010
Filed:
Sep. 18, 2006
Darren E. Bane, Broken Arrow, OK (US);
David Z. Anderson, Glenpool, OK (US);
Aaron T. Jackson, Broken Aarow, OK (US);
Clifford H. Beall, Broken Arrow, OK (US);
Edward W. Welch, Jr., Broken Arrow, OK (US);
Alan N. Wagner, Broken Arrow, OK (US);
Darren E. Bane, Broken Arrow, OK (US);
David Z. Anderson, Glenpool, OK (US);
Aaron T. Jackson, Broken Aarow, OK (US);
Clifford H. Beall, Broken Arrow, OK (US);
Edward W. Welch, Jr., Broken Arrow, OK (US);
Alan N. Wagner, Broken Arrow, OK (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A control system for a subsurface safety valve addresses normal open and closed operation and a failsafe operation if key system components fail. It features a single control line from the surface that splits at the subsurface safety valve and goes to one end of two discrete piston chambers that are aligned and isolated from tubing pressure. The piston in one chamber is larger than in the other and the pistons are connected for tandem movement. Each side of the unbalanced system's piston has a seal mounted to it and another for the rod attached to it that exits the chamber. A jumper line connects the chambers at a point between the seals in each chamber and features a large reservoir. The jumper line is filled with a compressible fluid. Fail safe closure of the valve occurs if any of the four seals fail.