ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,131, issued on July 1, was assigned to STEEL SPACE CASING DRILLING LTD (Berwick, Great Britain).
"Downhole rotary drive apparatus" was invented by Alan Phillips (Lauder, Great Britain), Tomasz Jozef Walerianczyk (Lauder, Great Britain) and Matias Garza (Lauder, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A downhole rotary drive apparatus (10) for driving a bit (12) used to drill or ream a borehole (B) comprises a body (14) configured for coupling to, or forming part of, a tubular string (S1;S2;S3) for running into the borehole (B) and an output shaft (16) at least partially disposed within and rotatably mounted to the body (14). A pl...