Downhole headstall structure of double-layer clamping pipe and using method of down-hole headstall structure

• Main Authors: HUANG XINCHUN, LI FENGHUI, LI LINGXI, TIAN XUYANG, ZHANG CHENGFU, SHI ZHANGZE, LIU LEI, FU JUN, MIAO JIE, HAO GUODONG, HUANG LINGGANG, SUN JINGYUN, ZHANG GUANGYI
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses an underground headstall structure of a double-layer clamping pipe. The underground headstall structure comprises a headstall seat, a lower end pressing sleeve, an upper end pressing sleeve, a pressing round pad, a main body and an anti-rotation pin, a through hole channel is formed in the headstall seat, an oblique conical surface for placing a lower-end pressing sleeve is formed in the middle of the headstall seat, the lower-end pressing sleeve is arranged at the position of the oblique conical surface, an upper-end pressing sleeve is arranged on the lower-end pressing sleeve, the main body is connected with the headstall seat through threads, and a pressing round pad is arranged between the main body and the upper-end pressing sleeve. The device can help people to fix an outer ring steel wire of a steel wire cable when a unit is dropped and fished, so that stress is concentrated on the outer ring steel wire of the cable. The problems that a conventional steel wire rope is fixed by c