Development and Application of Ultra-large Diameter Hanger Based on Finite Element Simulation Technology
Conventional hangers are not suitable for completing the expansion of screen pipes due to their small diameter.This can result in greater risks during subsequent operations.To address this issue,a super large diameter hanger with a diameter to thickness ratio of more than 8 was developed by incorporating functional structures such as main body sealing,sitting hanging,lower input transmission torque,and lost hand into the service tool.Firstly,the structural characteristics and working principle of the ultra-large diameter suspension were introduced.Then,finite element analysis of the core component cartridge was carried out,and the prototype of the hanger was manufactured and a number of performance experiments of the hanger were carried out.The analysis and experimental results demonstrated that the anti-liquid lock ball seat had good sealing performance.The suspension was seated,expanded,and discarded smoothly,which aligned with design expectations.Additionally,the pressure of the cartridge of the hanger exceeded 25 MPa.Structural parts such as kava and base pipe were capable of withstanding a 50 t suspension force load.Overall,the performance indicators met the requirements of on-site construction and use of expansion screen pipes.
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