Dual power workover rig is equipped with unique dual—input transmission case, and makes use of site power network and adopts variable frequency driving technology. One motor can satisfy the driving requirement of the draw works during normal operation, meanwhile Diesel engine of chassis is backup power supply, power can be switched depending on the requirement. Main body of workover rig is self—propelled, centralized control and operation. It has advantage of high efficiency, energy saving, emission reduction and environmental protection, and greatly reduce the operation cost. It can be made in skid—mounted electric workover rig according to the well site requirements, it is equipped with four hydraulic outrigger, which can realize to ascend and descend independently without hoisting equipment. It is transported by truck and flat—bed trailer. The main parts and components such as Crown block, Mast and Traveling system meet API standards.
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