Opener for connecting flanges of oil and gas pipeline

The utility model relates to an opener for connecting flanges of an oil and gas pipeline and belongs to the technical field of a detaching tool for the connecting flanges of the oil and gas pipeline in an oil field. The opener for the connecting flanges comprises a flange, a screw rod, a conical head screw rod and a pin rod, wherein a threaded hole is arranged at the center of the flange; at least more than two threaded holes are arranged in the periphery of the flange; one end of the screw rod is mounted in the threaded hole at the center of the flange through a thread; a nut is arranged at the other end of the screw rod; the nut is in threaded connection with the conical head screw rod. When an opening of the flange is connected, a flange opener is fixed on the connecting flange of the oil and gas pipeline by grafting the pin rod, a conical head of the conical head screw rod is jacked in the middle of the connecting flange of the oil and gas pipeline, and a wrench is used for screwing in the conical head screw rod, so that the connecting flange is opened, a clearance is formed between the connecting flanges of the oil and gas pipeline, the operation is simple and convenient, the working efficiency is high and the labor intensity is low.