RUBBER CYLINDER WITH RIGID SEAL RINGS ON BOTH ENDS, PACKER, AND BRIDGE PLUG

摘要

A rubber cylinder (10) with hard sealing rings on both ends, a packer (200) and a bridge plug being used in the oil exploration industry and capable of withstanding high temperature and high pressure. The rubber cylinder (10) comprises a wire sealing ring (71), a filament sealing ring (72), and a hard sealing ring. The wire sealing ring (71) abuts against the filament sealing ring (72) and is disposed below the filament sealing ring. The wire sealing ring (71) comprises a plurality of wires crossing with one another and an adhesive (109) gluing all of the wires together. The filament sealing ring (72) comprises a plurality of filaments crossing with one another and being high-temperature and high-pressure resistant, and the adhesive (109) gluing all of the filaments together. When the wire sealing ring (71) is disposed below the filament sealing ring (72), the friction between the wire sealing ring (71) and a central tube (30) and/or a casing (40) can reduce the axial pressure which is transferred to the filament sealing ring (72), such that the axial pressure received by the filament sealing ring (72) can be effectively reduced, and the occurrence of shoulder-like projections can be reduced or avoided.