Slip type underground restrictor with easy refloatation function

• Main Authors: XIAO SHUQIN, CHEN YONG, YANG XUDONG, WEI YAMING, LIU SHUANGQUAN, GUI JIE, WANG XIONGXIONG
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2018
• 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 underground tools for performing throttling and depressurization on high-pressure natural gas in natural gas well production, and particularly relates to a slip type underground restrictor with an easy refloatation function. The slip type underground restrictor comprises a putting device and a restrictor body, wherein the restrictor body is connectedunder the putting device, the putting device comprises at least a putting head, a first shear pin, a lock nut, a contraction claw and a first core rod, the restrictor body comprises at least a refloatation neck, a core shaft, a slip hanger, a first baffle ring, a positioning ring, a slip hoop, a slip, a second shear pin, a cone body, a second baffle ring, a connecting section, a de-clamping claw,a supporting body, a glue cylinder, a core cylinder, a second core rod, an air cylinder section, an air faucet, an air faucet seat, a pressing cap and a sand-proof cover. The phenomena resulting in the low refloatation succes