US Patent Issued to Halliburton Energy Services on July 21 for "Wide range retarder that improves early compressive strength development" (Texas Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,806, issued on July 21, was assigned to Halliburton Energy Services Inc. (Houston).

"Wide range retarder that improves early compressive strength development" was invented by William Cecil Pearl Jr. (Houston) and Samuel J. Lewis (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cement composition comprising an aqueous fluid, a cement, and a cement retarder. The cement retarder comprises a biosurfactant, and is operable to retard cement thickening of the cement composition, relative to a same cement composition absent the cement retarder, over a temperature range of from about 40deg F. (4.4deg C.) to about 500deg F. (260deg C.), from about 40...