US Patent Issued on March 25 for "Encapsulated lost circulation materials based on shape-memory polymer foam" (Texas Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,821, issued on March 25.

"Encapsulated lost circulation materials based on shape-memory polymer foam" was invented by Rostyslav Dolog (Houston), Qusai A. Darugar (Houston), Radhika Suresh (Sugar Land, Texas) and Oleg Mazyar (Katy, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An encapsulated lost circulation material includes: a particulate having a core including a compressed shape-memory polymer foam, and a disintegrating agent, the disintegrating agent including at least one of a phase change material or a gas-producing material; and a shell encapsulating the core. A method of reducing lost circulation includes: introducing into a subsurf...