Structural Design and Sealing Performance Analysis of a Nanofluidic Self-Heating Unsealing Rubber Cylinder

As a crucial component for temporary blocking of layer segments in the segmental fracturing process, bridge plugs are difficult to unseal by conventional methods and may cause major downhole accidents if not handled properly. In this paper, nanofluidic self-heating unsealing rubber cylinder is designed, which equipped with sandwich inside cylinder, consisting system an annular flexible heater. When unsealing, heated heater, can help plug shrink volume smoothly characteristics heat shrinkage cold expansion. The system, porous carbon exceptionally large specific surface area glycerol, serves as prime example filling layer, design parameters calculation was carried out. sealing performance designed analyzed based on Mooney–Rivlin principal structure finite element modeling. results show that maximum contact stress between casing wall increases 9.73%, compression distance reduces 24.47%, equivalent force decreases 12.17% average compared under same seating load. satisfy requirements pressure-bearing capacity performs better than cylinder.