US Patent Issued to SCHLUMBERGER TECHNOLOGY on June 10 for "Compositions and methods for well cementing" (American, Malaysian Inventors)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,822, issued on June 10, was assigned to SCHLUMBERGER TECHNOLOGY Corp. (Sugar Land, Texas).

"Compositions and methods for well cementing" was invented by Bipin Jain (Sugar Land, Texas) and Shameed Ashraf (Kuala Lumpur, Malaysia).

According to the abstract* released by the U.S. Patent & Trademark Office: "The effectiveness of expansive cement systems may be diluted when, during a well cementing operation, commingling takes place between the cement slurry and a spacer fluid, a drilling fluid, or both. Incorporating expansive agents in the spacer fluid or drilling fluid may reduce or negate the loss of expansion at the cement slurry/spacer interface or the cement slurry/drilling flui...