US Patent Issued to Southwest Petroleum University, ChengDu Sinoreal Technology Engineering on June 10 for "Infinite-stage fracturing sliding sleeve" (Chinese Inventors)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,067, issued on June 10, was assigned to Southwest Petroleum University (Chengdu, China) and ChengDu Sinoreal Technology Engineering Co. Ltd (Chengdu, China).

"Infinite-stage fracturing sliding sleeve" was invented by Pingli Liu (Chengdu, China), Xianzheng Zhao (Chengdu, China), Fengming Jin (Chengdu, China), Peng Wang (Chengdu, China) and Jie Tang (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is an infinite-stage fracturing sliding sleeve. The infinite-stage fracturing sliding sleeve includes an outer cylinder, an inner cylinder, a sliding cylinder, an elastic element and a counting mechanism, wherein the inner cylinder cl...