US Patent Issued to Halliburton Energy Services on June 16 for "Gravel pack service tool back pressure valve" (American, Null Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,655,726, issued on June 16, was assigned to Halliburton Energy Services Inc. (Houston).

"Gravel pack service tool back pressure valve" was invented by Jonathon Franklin Neal (Carrollton, Texas), Gary J. Geoffroy (Carrollton, Texas) and Ping Chew Chay (Negara Brunei, Brunei Darussalam).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus comprises a service tool configured to be deployed in a wellbore as part of a managed pressure drilling operation of the wellbore, wherein an annulus is defined between a wall of the wellbore and a work string that includes the service tool, a drill pipe, and a lower completion, the service tool comprising, a cross...