ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,516, issued on March 31, was assigned to Silverwell Technology Ltd. (Cambridge, Great Britain).
"Contingency sealing option for surface controlled flow control device" was invented by Joel David Shaw (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A contingency valve provides redundancy to a surface controlled flow control valve for blocking flow into production tubing from a surrounding annulus when the surface controlled flow control valve is not operational. The surface controlled flow control valve and the contingency valve are disposed in an eccentric portion of the production tubing, and include valve members that are selectively disp...