Multi-purpose reducing oil pipe nipple device

The utility model relates to a multi-purpose reducing oil pipe nipple device which belongs to the technical field of ground tool equipment of petroleum engineering. Small-diameter pipe external threads, a small-diameter pipe body, a transitional cone-shaped body, a large-diameter pipe body and large-diameter pipe external threads are arranged on the outer circumference of a reducing oil pipe nipple, large-diameter pipe internal threads and small-diameter pipe internal threads are formed in an inner cavity of a reducing oil pipe coupling, and the reducing oil pipe nipple is connected with the reducing oil pipe coupling. The multi-purpose reducing oil pipe nipple device has the beneficial effects that the multi-purpose reducing oil pipe nipple is provided, the multi-purpose reducing oil pipe nipple device is suitable for universal multi-purpose reducing oil pipe nipples used for removing conical surface hung type oil pipe hangers and flange hung type oil pipe hangers and installing or removing elastic rubber co