ABAQUS-Based Simulation and Performance Analysis of Composite Bridge Plug Drilling

In order to improve the safety, reliability and efficiency of composite bridge plug drilling, by taking the carbon fiber composite bridge plug and bit with cylindrical cutters as the researching objects, finite element simulation of composite bride plug drilling process in three dimensional (3D) was made based on the secondary development functions of the ABAQUS software. The influence of bit pressure and drilling speed on bridge plug drill-out rate, axial contact force and torque of the bit was analyzed with the orthogonal experiment. The results show that, the bridge plug drill-out rate, maximum axial contact force and maximum torque of the bit will increase with bit pressure and drilling speed; the sensitive factor for the fluctuation of drill-out rate and torque is the rotational speed, while the sensitive factor for the fluctuation of the axial contact force of the bit is bit pressure; the influence of bit pressure on the axial contact force of the bit is about 2 times that of the rotational speed, but the influence of the bit pressure and rotational speed on torque fluctuation is almost the same. Therefore, during plug drill-through, it may appropriately reduce the bit pressure, increase the rotational speed to decrease the axial force and torque fluctuation, and thus to prolong the bit life. The research results providenew ideas for the research method of composiee bridge plug drilling.