Wide speed range electric energy storage workover rig

Abstract

An electric energy storage workover rig wide in the speed adjustable range is used for oilfield workover operation and comprises a transmission system, an electric control system and a liquid gas path system, wherein the transmission system comprises a variable-frequency motor, a coupler, a gearbox, a transmission shaft, an angle transmission case, a winch, a moving system and a driller box which are sequentially connected; the transmission system is reasonably matched with an upper transmission system through the variable-frequency motor, the power output range of the workover rig is widened, and higher working efficiency can be ensured under different load conditions. The electric control system comprises a frequency converter and a supercapacitor, the supercapacitor is charged during down-passing and clamping releasing of the workover operation and is rapidly discharged during rising of the workover operation, and the supercapacitor and a wellsite transformer supply power to the variable-frequency motor together. The liquid gas path system drives a triple pump through one hydraulic station motor and provides hydraulic power to a workover rig hydraulic system, a gearbox lubricating system and a hydraulic air compressor, configuration of a power source is reduced, the production cost is reduced, a whole vehicle is compact in structure, and light weight is achieved.

Description

technical field [0001] The invention relates to the technical field of workover rigs used in oil and gas development, in particular to an electric energy storage workover rig with a wide speed regulation range. Background technique [0002] Workover rigs are important equipment for oilfield workover operations, and most oilfield workover rigs are powered by vehicle-mounted diesel engines. With the country's high standard requirements for energy saving and emission reduction, and the rising price of diesel oil, the use of electric workover rigs to replace diesel powered workover rigs has become a new development direction. Electric workover rigs have the advantages of high energy utilization, less environmental pollution, and low operating costs. However, electric workover rigs are limited by the capacity of well site transformers during use, and most of them are difficult to meet operational needs. The power of the electric workover rig will lead to low power and low operat...

AI Technical Summary

Problems solved by technology

Electric workover rigs have the advantages of high energy utilization, low environmental pollution, and low operating costs. However, electric workover rigs are limited by the capacity of well site transformers during use, and most of them are difficult to meet operational needs. The power of the electric workover rig will lead to low power and low operating efficiency of the electric workover rig

Images