Clamping mechanism of large-diameter throttling device

• Main Authors: XIAO SHUQIN, CHEN YONG, YANG XUDONG, FU GANGDAN, WEI YAMING, CHENG XIAOLI, LIU SHUANGQUAN, GUI JIE, WANG XIONGXIONG, HAN QIANGHUI
• Format: Patent
• Language: English
• Published: 18.02.2015
• 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 belongs to the technical field of tar field gas production and particularly provides a clamping mechanism of a large-diameter throttling device. The clamping mechanism comprises a throttling device body, a salvaging neck, a glossy slip and two toothed slips, wherein the salvaging neck is arranged on the outer wall at the upper end of the throttling device body in a sleeving manner and is uniformly provided with three grooves along the radial direction; three slip grooves are uniformly formed in the middle part of the throttling device body along the radial direction; the upper ends of the glossy slip and the two toothed slips are fixed into the three grooves of the salvaging neck respectively; the glossy slip and the two toothed slips are arranged on the throttling device body and are fixed into the three slip grooves of the throttling device body. According to the clamping mechanism of the large-diameter throttling device, an asymmetric design of the glossy slip and the two toothed slips is sufficiently utilized; the glossy slip keeps balance when being sealed and the balance is broken in a releasing process; the problem that the large-diameter underground throttling device is difficult to unlock is solved.