Development and application of new isolated liner hanger

In order to adapt to high temperature, high pressure, high sulfur content and high solid wellbore conditions in Yuanba region, a new isolated liner hanger was developed to solve the gas channeling problem of hollow ring. The packer unit uses single-barrel structure, which ensures safety and reliability of the tool. The retrieve-proof slip is designed along with the internal retrieve-proof spring structure, which effectively reduces the rebound clearance after expansion of the barrel and ensures the isolation capacity of the packer. Application of the tool in four wells shows that this tool satisfies the design requirement in terms of safety and effectiveness and solves the problem of gas channeling in annulus in Yuanba Gas Field.