US Patent Issued to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS on March 31 for "Amphoteric amphiphiles for shale swelling inhibition in oil and gas reservoirs" (Saudi Arabia Inventors)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,238, issued on March 31, was assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS (Dhahran, Saudi Arabia).

"Amphoteric amphiphiles for shale swelling inhibition in oil and gas reservoirs" was invented by Muhammad Israr (Dhahran, Saudi Arabia), Mobeen Murtaza (Khobar, Saudi Arabia), Muhammad Shahzad Kamal (Dhahran, Saudi Arabia) and Syed Muhammad Shakil Hussain (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A shale swelling inhibiting composition includes a water-based drilling mud and an amphiphilic polymer selected from the group including S1, S2, and combinations thereof. The structure of S1 is and the structure of S2...