Abstract
In order to study the performance variation rule of shear coiled tubing or wireline of SSTT ball valve under different work conditions and different structural parameters. In this study, a numerical simulation method is used to establish a ball valve shear model to calculated the shear process of different working conditions, such as torque, coiled tubing tension, shear velocity and different thickness of coiled tubing under given parameters. The calculated results of the numerical simulation model are in good agreement with the experimental results in the laboratory, which verifies the accuracy of the numerical simulation model of the shear continuous coiled tubing of ball valve mechanism. Based on this model, the failure state and stress state of the ball valve are further studied. This study presents an optimization method to improve the shear fracture performance of ball valves. In order to further evaluate the shear performance of the SSTT, the finite element analysis (FEA) method was used to analyze the influence of single variable or combination variable on the shear force. This study has important guiding significance for the optimal design and application operation on the shearing mechanism of ball valve in the SSTT.
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