Energy-storage workover rig

Abstract

The invention discloses an energy-storage workover rig. The energy-storage workover rig comprises a battery module, and workover operation and chassis traveling of the energy-storage workover rig areboth powered by the battery module. The energy-storage workover rig has the beneficial effects that electricity supplying is achieved through a battery with the large power charge-discharge function,the problem that electric power supplying is insufficient in a well field is solved, the large power operating demands during operation are met, and the operation efficiency is improved. Through charge-while-discharge of the battery module, running potential energy in the workover operation and kinetic energy during traveling are converted into electrical energy stored in the battery module, the electrical energy provides required power for the workover operation and chassis traveling of the workover rig, the pure electric workover rig is achieved, and the key technical problems of single electric on-table operation or single electric traveling in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of workover rigs, in particular to an energy storage workover rig. Background technique [0002] The workover rig is a specialized mechanical equipment for maintenance of downhole pipe strings or wellbore in oil fields, and is mainly used for lifting and lowering oil pipes, sucker rods and pumps. At present, the diesel engine is the main power source of the workover rig, providing power for the workover rig to travel and operate. However, diesel combustion will produce a large amount of harmful gases, causing environmental pollution, which neither meets the national energy conservation and emission reduction policies nor meets the requirements of environmental protection. Diesel engines only convert 30% of the heat energy generated by diesel combustion into mechanical energy, resulting in low efficiency of diesel workover rigs. The failure rate of diesel engine is high, and the power utilization rate is lo...

AI Technical Summary

Problems solved by technology

[0004] The workover rig has a short operating cycle and frequent relocation. If the high-voltage power grid is used to obtain power, it needs to be approved by the power department. Due to factors such as "long time for approval of high-voltage power grid operation and danger of power connection", the flexibility of the electric drive workover rig is limited.

If the power is taken from the low-voltage end of the pumping unit transformer, the power of the pumping unit transformer is smaller than the power of the drawworks motor, which cannot meet the power requirements such as hook load and hook speed required for major workover rig operations

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