Electrical Submersible Pump (ESP) is a rodless pumping device. The multi-stage centrifugal pump and motor are submerged below the well fluid level. The motor drives the pump to lift well fluid to the surface. It is mainly used in medium-to-high production low-viscosity oil wells.
Downhole operation, high maintenance cost, requires reliable continuous operation
Sand jamming easily occurs in sandy wells, causing shutdown
Gasification and cavitation may occur during operation
Crude oil backflow after shutdown causes regenerative power
INVT provides high, medium and low-voltage VFDs for ESPs to meet different power and voltage requirements. Built-in open-loop vector and SVPWM algorithms effectively improve starting torque.
View Larger ImageReliable and durable: variable frequency operation, overload/underload warning
Low-frequency high-torque, rocking start: torque boost and rocking start solve sand jamming
Integrated intelligent control: built-in communication improves system interconnection
Overload/underload protection prevents locked rotor or idling
The VFD integrates drive algorithms for both synchronous and induction motors, no need to replace the VFD.
Built-in rocking start algorithm and torque boost algorithm ensure no pump jamming.
GD200A Series General-Purpose VFD
0.75-500kW
Supports G/P type load
CE, UKCA, and EAC certified
GD3000 Series Three-level Medium Voltage VFD
Input voltage: AC 3PH 970V–1310V (1140V)
Output frequency: 0–400Hz
Cooling method: Water cooling; heat pipe cooling
GD5000 Series Medium Voltage VFD
250KVA–17500KVA
3~11KV
IP30 (Customizable for other IP rating)
Electric Drive Rig
The oil rig is driven by frequency conversion technology, enabling the drawworks to output maximum torque at zero speed and ensuring the hovering function of the hoisting system. It completely changes the traditional driller operation mode and realizes automatic drilling feed through frequency conversion and full digital control technology.
Low-voltage Oil-to-Electric Retrofit
Diesel engines are replaced by direct-drive motors, eliminating hydraulic couplings to maximize transmission efficiency. Two original diesel engines are retained as backup. GD800 engineering VFD supports master-slave control and power balance for even load distribution.
Energy Storage Workover Rig
The electric energy-storage workover rig uses battery energy storage to compensate for insufficient transformer capacity, realizing peak cutting and valley filling for drawworks power fluctuation. It solves the problem that low-voltage grid power cannot meet high-power hoisting demand. It facilitates intelligent automatic control with excellent energy-saving effect.
Beam Pumping Unit
Beam pumping unit, commonly known as “nodding donkey”, is the main lifting equipment in rod pumping systems. It converts motor rotation into reciprocating motion of the sucker rod via four-bar linkage to drive the downhole pump.
Tower Pumping Unit
Tower pumping unit, also known as long-stroke pumping unit. It uses vertical tower structure instead of traditional beam, and wire rope & drum instead of four-bar linkage. It realizes direct vertical lifting and lowering of sucker rod, avoiding shortcomings such as short stroke, low efficiency and heavy weight.
Direct-Drive Progressing Cavity Pump
Direct-drive progressing cavity pump is a surface-driven system without gearbox or belt drive. The low-speed high-torque motor is directly connected to the polished rod. The VFD controls motor speed to directly drive the downhole pump. It is mainly used for heavy oil, high gas, sand and wax content wells.
Oil Transfer Pump
Oil and gas storage and transportation link the upstream and downstream industries of the energy sector. The safe and efficient transmission of energy is a key part of social development, along with economic growth and the transformation of the energy structure.INVT medium-voltage frequency converters are widely applied in oilfield sites and have won unanimous praise from users in applications such as natural gas compressors and large oil transportation pumps.
Natural Gas Compressor
Natural gas compressor is the “heart” of long-distance natural gas pipelines. It compresses and boosts natural gas to provide required pressure for pipeline transportation, and is key equipment for reliable pipeline operation.
Low-Voltage Hot Redundant VFD
Hot redundant frequency converter consists of one main control converter and two low-voltage converters of the same specification.In case of a fault in the active converter, the system can automatically and seamlessly switch to the standby converter within milliseconds, ensuring uninterrupted and continuous operation of critical loads such as compressors, pumps and fans.
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