US Patent Issued to Schlumberger Technology on Dec. 2 for "Lightweight composite cement compositions and methods of cementing wells with said compositions" (British, American Inventors)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,445, issued on Dec. 2, was assigned to Schlumberger Technology Corp. (Sugar land, Texas).

"Lightweight composite cement compositions and methods of cementing wells with said compositions" was invented by Valerie Gisele Helene Lafitte (Sugar Land, Texas), Dean Michael Willberg (Houston) and Anatoly Medvedev (Cambridge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Composite cement compositions and pumpable slurries for cementing well or at least one zone of the wells are provided and comprise cementitious material that forms calcium silicate hydrates upon exposure to water, inert filler material, nano-sized calcium carbonate particles, ...