ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,419, issued on July 14, was assigned to Halliburton Energy Services Inc. (Houston).
"High flow, tubing insensitive, deep set wireline retrievable safety valve" was invented by Merced Gonzalez (Singapore), Matthew Gassen (Carrollton, Texas) and James Williams (Carrollton, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of a high flow, tubing insensitive, deep set wireline retrievable safety valve are disclosed herein. In one embodiment, a valve system for use downhole in a wellbore comprises a tubing retrievable safety valve (TRSV) and a secondary safety valve to be positioned within the TRSV. The secondary safety valve comprises at ...