ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,991, issued on Nov. 11, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).
"Single-phase alcohol-based retarded acid" was invented by Julia Fernandez del Valle (Doha, Qatar), Christopher Daeffler (Sugar Land, Texas) and Mohan Panga (Sugar Land, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Treatment of subterranean formations using acid blends that contain alcohols and surfactants is described herein. The alcohols and surfactants are used together to retard the activity of acid on acid-susceptible species of rock formations."
The patent was filed on July 11, 2022, under Application No. 18/577,787.
*For further information, i...