ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,862, issued on Aug. 19, was assigned to Schlumberger Technology Corp..
"Fluid loss control agent for aqueous wellbore fluids" was invented by Balakrishnan Panamarathupalayam (Houston) and Linus Sebelin (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "Fluid loss control agents for use in a water-based wellbore fluid. The fluid loss control agents generally include non-crosslinked copolymers of non-carboxylated monomers. Water-based wellbore fluids containing the above fluid loss control agents and methods of servicing a wellbore in a subterranean formation by placing the water-based wellbore fluids in the wellbore."
The patent was filed on De...