ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,252, issued on June 3, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).
"Systems and methods for generating a downlink signal" was invented by Milan Subotic (Katy, Texas), Scott Richard Woolston (Spanish Fork, Utah), Christopher Paul Reed (West University, Texas) and Pavel Annenkov (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A flow regulation system for downlink communication includes a fixed flow valve and a variable flow valve on a discharge line. A pressure sensor is located between the fixed flow valve and the variable flow valve. A sinusoidal communication flow pattern in the drilling fluid is generated by adjusting...