ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,172, issued on April 15, was assigned to WEATHERFORD TECHNOLOGY HOLDINGS LLC (Houston).
"Gas injection operational safety for subterranean wells" was invented by Danilo Iglesias (Macae, Brazil) and Virgilio M. Porto (Macae, Brazil).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of injecting gas into a well can include flowing the gas through a gas flow passage extending through a housing connected to a wellhead installation, the gas thereby flowing through the wellhead installation and into an annulus in the well, and maintaining fluid pressure applied to a piston of a gas injection valve while the gas flows into the annulus. A gas injection ...