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When the working stratum pressure of the subsurface safety valve is large, the fluid in the well will have a greater impact on the valve plate, and even directly determine the opening resistance of the subsurface safety valve plate. By fluid analysis, we can get the fluid pressure cloud diagram and the velocity distribution cloud diagram of the valve plate at different opening angles, also we can get the opening resistance of the valve plate under the effect of the fluid, as well as the relationship between the resistance torque of the fluid resistance around the valve plate pinhole and the opening angle of the valve plate, providing certain guidance for the opening operation of the subsurface safety valve. Through the one-way fluid-solid coupling analysis, the stress cloud diagram and the maximum equivalent stress change under the effect of the fluid load are obtained when the valve plate is opened at different angles.
subsurface safety valve, fluid-solid coupling, opening resistance, resistance torque
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