Coiled tubing hanger

Abstract

The invention discloses a coiled tubing hanger comprising a core shaft, an upper connector, a piston, a rubber cylinder assembly, a locking assembly, a tubing clamping assembly and a slip expansion guiding assembly. A pressure conveying hole is formed in the core shaft; the outer wall of the core shaft is sleeved with the upper connector connected with the core shaft; the core shaft is sleeved with the piston, and the piston is connected with the upper connector through first shearing nails; the outer wall of the core shaft is sleeved with the rubber cylinder assembly; the core shaft is sleeved with the locking assembly, and the locking assembly is connected with the core shaft in a matched mode; the tubing clamping assembly comprises slips which can be extruded to clamp a tubing and a slip seat for fixing the slips; and the slip expansion guiding assembly comprises an upper cone body and a lower cone body, and the outer wall of the core shaft is sleeved with the upper cone body and the lower cone body. According to the coiled tubing hanger provided by the invention, influence of an inlet gas extraction device on a downhole safety valve can be effectively avoided, the purpose of safe control is realized, oil gas extraction can be realized, and safety of extraction is guaranteed.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering, in particular to a coiled tubing hanger. Background technique [0002] During the production process of oil and gas fields, especially in the middle and later stages of gas well production, due to the drop in production layer pressure and increase in water content, the produced water cannot be discharged in time, which reduces the production of gas wells, or even is crushed to death, resulting in no gas production. Using the principle of variable diameter fluid mechanics, a small-diameter pipe string is lowered into the original production pipe string to form a new production channel, drain water and produce gas, and immediately carry the formation water produced by the gas well out of the wellhead through high-speed airflow, which can effectively increase the production capacity of the gas well . However, at present, the small-diameter pipe string used in this technology is usuall...

AI Technical Summary

Problems solved by technology

However, at present, the small-diameter pipe string used in this technology is usually suspended at the wellhead, which hinders the downhole safety valve, resulting in the failure of the downhole safety valve to close normally. After an emergency occurs, emergency measures cannot be taken, thus causing safety hazards and not conducive to Later underground various operations

Images