ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,091, issued on July 21, was assigned to Silverwell Technology Ltd. (Girton, Great Britain).
"Contingency for surface controlled gas lift valve" was invented by Joel David Shaw (Houston) and Rafael Bastardo (Dubai, United Arab Emirates).
According to the abstract* released by the U.S. Patent & Trademark Office: "A contingency for non-operation of a valve in a side pocket mandrel of production tubing includes creating a selective barrier to fluid communication across sidewalls of the production tubing. The barrier is formed by an insert that is installed in the side pocket mandrel, which includes a valve that responds to pressures inside and outside the production tubing to selecti...