For an accurate force prediction of BOP shearing drill pipe is of critical importance in reliable sealing of the wellhead in an emergency, based on the shear motion equation, the Treace yield criterion, sliding line field and wedge mechanics theory are applied to establish the prediction model of shearing force. The theoretical force is consistent with the simulation force in the novel shear rams simulated shearing CT90 tube process before the peak force and shear experiment verified the reliability of the numerical simulation. Further, the influences of the structural parameters of the rams on the maximum shearing force are investigated by the orthogonal test and range analysis method. The study shows that the maximum shearing force with the increase of the V-shape angle increases first and then decreases, decreases with the increase of the blade angle and the edge chamfer angle, and increases linearly with the increase of the blade mouth thickness; the optimal V-shape angle is around 75°.

为了准确预测防喷器的剪力，对于紧急情况下井口的可靠密封至关重要，基于剪切运动方程，运用Treace屈服准则，滑移线场和楔形力学理论建立了预测模型。剪切力。在峰值剪切力和剪切实验验证了数值模拟的可靠性之前，理论力与新型剪切撞杆模拟剪切CT90管工艺中的模拟力是一致的。此外，通过正交试验和范围分析法研究了闸板的结构参数对最大剪切力的影响。研究表明，随着V形角的增加，最大剪切力先增大后减小，随着叶片角度和倒角角度的增加而减小，随着叶片口厚度的增加而线性增加；最佳的V形角度约为75°。