US Patent Issued on March 17 for "Liquid accumulation-free production and drainage system for oil and gas well" (Chinese Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,861, issued on March 17.

"Liquid accumulation-free production and drainage system for oil and gas well" was invented by Jingzhi Li (Shijiazhuang, China), Tianyu Zhang (Shijiazhuang, China), Ziheng Cao (Shijiazhuang, China), Yunshan Jin (Shijiazhuang, China) and Xudong Ding (Shijiazhuang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a liquid accumulation-free production and drainage system for oil and gas well, including a casing and a production string, and the casing is arranged in the oil and gas well, and the bottom of the casing is inserted below the oil and gas liquid level, the production string is a...