Study on the Pressure Performance of Soluble Bridge Plug Metal Sealing Ring

Aiming at the problem that a new type of all metal soluble bridge plug metal sealing ring is not tightly sealed, resulting in the overall pressure bearing performance of the bridge plug not meeting the design index, simulation analysis, size optimization, and experimental verification of the sealing performance of the metal sealing ring were carried out. Using finite element analysis software, the cone, metal sealing ring, auxiliary ring, and casing models were established to analyze the pressure bearing performance under sealing conditions. It was concluded that the direct reason for the failure of the bridge plug pressure to meet expectations was the low maximum contact stress between the metal sealing ring and the casing, and the poor sealing effect. In order to improve the sealing effect of the metal sealing ring and the overall pressure bearing performance of the bridge plug, the structural dimensions of the metal sealing ring were optimized. Based on the optimized size of the metal sealing ring, a pressure bearing laboratory test of the bridge plug prototype was conducted. The test results showed that the pressure bearing capacity of the bridge plug was 90 MPa without leakage, and the sealing effect was good, meeting the pressure bearing index requirements. This study provides a reference basis for the structural design of metal sealing rings for all metal soluble bridge plugs.