US Patent Issued to RheoVest on Nov. 11 for "Method and composition for subsurface well intervention to reduce well fluid loss" (Louisiana Inventor)

ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,987, issued on Nov. 11, was assigned to RheoVest LLC (Shreveport, La.).

"Method and composition for subsurface well intervention to reduce well fluid loss" was invented by Nathan R. Hutchings (Shreveport, La.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composition for lost circulation material (LCM) usable in subsurface well intervention includes particles of a hydrated superabsorbent polymer (SAP) mixed with a chemically-digestible fiber and an aqueous solution of a salt tolerant osmotic barrier polymer. A method for stopping fluid loss from a well into a formation penetrated by the well includes pumping a selected volume of the composition in...