US Patent Issued to BAOSHAN IRON & STEEL on Nov. 11 for "High-strength and high-toughness bainite geological drilling pipe and manufacturing method therefor" (Chinese Inventors)

ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,560, issued on Nov. 11, was assigned to BAOSHAN IRON & STEEL Co. LTD. (Shanghai).

"High-strength and high-toughness bainite geological drilling pipe and manufacturing method therefor" was invented by Wen Sun (Shanghai), Yaoheng Liu (Shanghai), Zhonghua Zhang (Shanghai), Ping Hu (Shanghai) and Yannan Ma (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a bainite geological drilling pipe, comprising the following chemical elements in percentage by mass: 0.14-0.22% of C, 0.2-0.55% of Si, 2.1-2.9% of Mn, 0.01-0.04% of Nb, 0.015-0.04% of Al, 0.001-0.005% of B, 0greater thanNless than equal to0.007%, with the balance...