Study on dynamic sealing performance of combined sealing structure of telescopic type of downhole robot by using HTHP coupling method

The sealing performance will directly affect the operation of downhole robot under HTHP condition. Traditional analysis methods are that temperature and pressure is loaded respectively. This can not really evaluate performance. Besides, simulation process is: Step 1: pre-compress O-ring to produce contact force. According pressure, select compression ratio calculate displacement slip ring. 2: load fluid on O-ring. method undeformed However, deform after pre-compression. Therefore, this accurate. In order make data more accurate, shape, stress, strain caused by pre-compression assembly. Then, import deformation body containing real into a new model. On basis, establish numerical model piston, piston guide rod, O-ring, FTS-ring with loads is. Finally, analyze. When about 14%, good. What’s more, distribution stress Von Mises at 8.3 mm/s motion speed analyzed. results show foot shaped combined structure keep good dynamic paper provides theoretical basis for using coupling method. performance: hydraulic produced accurately It also reference design tools.