Super-capacitor energy storage type electric workover rig

Abstract

A super-capacitor energy storage type electric workover rig comprises an automotive chassis special for the workover rig, wherein an air compressor, a hydraulic station, an electric control chamber, a derrick and a workover operating room are installed on the automotive chassis special for the workover rig, the rear end of the derrick is hinged to the top of an inverted triangle-shaped support, and the bottom end of the inverted triangle-shaped support is installed on the tail portion of the automotive chassis special for the workover rig; a super-capacitor power compensation device is arranged on the automotive chassis and comprises a rectifying circuit unit, the rectifying circuit unit is connected with a mains supply power grid through an electric wire connected with a circuit on-off switch in series, the rectifying circuit unit is also connected with an inversion unit and a bi-directional DC-DC converter, the bi-directional DC-DC converter is connected with a super capacitor through a circuit, and the inversion unit is connected with a variable-frequency adjustable-speed motor. According to the super-capacitor energy storage type electric workover rig, stable work can be conducted by means of a low-power transformer available in an oil field well site, performance is quite safe and reliable, working efficiency is high, and energy saving and environment protecting properties are higher.

Description

technical field [0001] The invention relates to an electric workover machine with supercapacitor energy storage. Background technique [0002] Petroleum workover rigs are specialized machinery and special equipment for maintenance of downhole pipe strings or wellbore in oil fields. They are mainly used for lifting and lowering oil well pumps, sucker rods and oil pipes. Traditional workover rigs use vehicle-mounted diesel engines as power sources, and share a set of power systems for driving and operation. Traditional workover rigs mostly use vehicle-mounted diesel engines + hydraulic transmission boxes. The hydraulic transmission boxes are equipped with hydraulic torque converters and mechanical gearbox. [0003] Traditional workover rigs powered by vehicle-mounted diesel engines have the following problems: [0004] (1) The pollution is serious. According to incomplete statistics, there are more than 4,000 workover rigs in all oilfields across the country, with an annual...

AI Technical Summary

Problems solved by technology

[0005] (2) Low work efficiency

The electric workover rig is powered by the wellsite power supply, but most of the oilfield wellsite transformers in my country are small in power, which cannot meet the power requirements of the electric workover rig. If the power of the electric workover rig is matched according to the capacity of the wellsite grid, it will lead to The power of the well rig is small and the operating efficiency is low

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