Seamless steel tube for drill rod of precise coring drill

• Main Authors: LI CHAO, XIAO ZHENXING, LIU HONGXIANG, HU BO, LI JIANGUI, HU SHUNZHEN, JIAO ANYAN, LIANG SHENYANG, ZHANG HONGKAI, SUN YUNDA
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PERFORMING OPERATIONS; TRANSPORTING

The seamless steel pipe comprises an outer pipe, a wear-resisting layer is arranged on the surface of the outer pipe, an inner pipe is installed in an inner cavity of the outer pipe in an embedded mode, a reinforcing ring and pouring filler are installed in the middle of the outer wall of the inner pipe, reinforcing ribs are arranged in the pouring filler, and a limiting block, a groove and a thread are arranged at the position of an end opening of the inner pipe. A butt-joint sleeve is installed on the surface of an end opening of the inner pipe through threads, and a protruding block is installed on the inner wall of the butt-joint sleeve. The seamless steel pipe for the drill rod of the precise coring drill is used for forming a seamless steel pipe double-layer reinforcing structure, the problem that a traditional single layer is low in strength and prone to cracking, and consequently operation is sheltered is solved, the structural strength of the inner pipe is independently improved, and meanwhile the ou