Since INVT successfully completed 11 sets of DB40 low-temperature drilling rig equipment for the Russia national oil project with domestic partners in 2017 after selecting medium voltage GD3000 series three-level skill inverter and domestic partners, INVT people continue to study the drilling rig application process, and the rich product series are to meet the different application needs of the drilling rig occupation, and the Russian oil project marks the first real meaning of the domestic inverter represented by "INVT" to enter the field of electric drilling rig main drive application, breaking the monopoly of imported brands. It also reflects the progress of domestic frequency conversion skills;
An oil drilling rig is a professional machinery used for oil and gas drilling, which is a set of combined units composed of multiple equipment. There are many classifications of drilling rig types according to drilling method, drilling depth, regional environment, movement method, and drive transmission mode
Composition of an electrically driven drilling rig
The electric drive drilling rig is mainly composed of power system, electric drive system, lifting system, rotation system, mud circulation system, liquid gas control system, oil supply and water supply system, drilling parameter detection and processing and transmission system, wellhead tools and auxiliary facilities.
Although, at present, the oil rig drive market is dominated by imported brands, and there are few domestic brands, but with the changes in the domestic and foreign situation, the consideration of oil production costs and the development of domestic frequency conversion skills, the localization of oil drilling rig drive will gradually become a trend.
The winch, mud pump and turntable of ZJ70DB drilling rig are all independently driven by AC inverter motors, and 9 VFD inverter cabinets drive 9 AC motors:
The main drive voltage is 600V, the power supply system is 10kV/0.6kV main drive, and 10kV/0.4kV auxiliary equipment is used;
The main drive part consists of 3 sets*2, 6 sets of 600kW/600V mud pumps, 1 set of 800kW/600V turntable, and 2 sets of 600kW/600V winch; The turntable is driven by a single motor; The winch is driven by dual motors, which can be used separately from a single motor; The mud pump is driven by two motors, and it cannot be used as a stand-alone machine;
The whole drive system uses GD800 engineering frequency conversion series products, diode rectification, and common DC bus plan;
The control is controlled by Profinet communication.
Program Features:
Excellent motor control algorithm, thereby reducing motor noise, temperature rise, and extending the life of the motor;
Excellent driving function, multi-machine power balance synchronous operation;
Super power grid adaptability, coping with grid power and generator power supply forms;
Excellent zero-speed hovering function, improve the reliability of the equipment, and prevent the "slippery hook" caused by logical problems between the equipment and the drivers;
Flexible torque control, solving the torque limit release of drill pipe from the drive end, echoing faster and higher safety level;
Modular design, compact design, effectively reduce the space volume;
Ultra-high reliability, modular power units, redundant backup for each other.
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