Quick disassembling and assembling protective wire for oil casing

The utility model relates to an equipment part, in particular to a protective wire for quickly disassembling and assembling an oil casing. According to the technical scheme, the special tool comprisesan outer cylinder, an upper cover, two wrenches, a spring, two split protective wires and two fixing pin shafts, the two fixing pin shafts are fixedly installed on an annular bottom plate of the outer cylinder side by side, the two split protective wires are arranged on the two fixing pin shafts in a sleeved mode respectively to form rotating connection, and guide pins are arranged on the split protective wires. The wrenches are provided with wrenches and bosses, the wrenches of the two wrenches are placed adjacently, and the bosses of the two wrenches are connected through the spring; two oblong holes are formed in the wrench and are respectively sleeved on the fixed pin shaft and the guide pin; the upper cover and the outer cylinder are installed together to package the split protectivewire and the wrench insid