US Patent Issued to Halliburton Energy Services on Sept. 30 for "Synergistic viscosifiers for clay-free, water-based drilling fluids" (Texas Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,588, issued on Sept. 30, was assigned to Halliburton Energy Services Inc. (Houston).

"Synergistic viscosifiers for clay-free, water-based drilling fluids" was invented by Emily Hart (Houston), Hui Zhou (Houston) and William W Shumway (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A water-based drilling fluid can include a first and second viscosifier of a cross-linked starch and a cross-linked acrylamide-based polymer. The acrylamide-based polymer can be crosslinked and optionally include hydrophobic monomers. The viscosifiers create a synergistic effect that imparts desirable properties to the drilling fluid compared to using either of th...