In petroleum exploitation, the oil well power supply mode has always used power supply at the oil production site with three-phase AC line to set up in the oil well, and then go through a single well transformer into a low-voltage, and then transmitted to the oil well start-up cabinet to control the motor operation. This technology is mature and easy to use. However, there are still problems such as high frequency converter failure rate and inefficient use etc. Moreover, the unbalanced power consumption of pumping unit in production results in the phenomenon of “reverse power generation”, virtually causing waste of electric power and loss of service life of equipment. The controlled inverter energy saving system of oil well group can change the decentralized control to the centralized control. The system transfers the low-voltage alternating current after the step-down of a single transformer to the direct current to each single well, and then the “reverse power generation” of each well pumping unit is transmitted to the power grid through DC bus. It has effectively improve the efficiency of power use while reducing the redundant waste of transformer. In addition, with the use of wireless remote transmission technology such as ZIGBEE, energy consumption data and production data for each single well can be transmitted to the monitoring terminal in real time; hence, the monitoring and automatic control of the oil wells can be achieved.

Working principle

Controlled inverter energy saving system of oil well group (hereinafter referred to as system) allows multiple wells within a radius of 3 km in the same mining area share a transformer and a set of DC power sources, and single well transmission mode is converted from three-phase AC to two-phase DC power supply. Each single well is equipped with a variable frequency mutual feed control cabinet and connected to the DC bus to complete the motor drive. The variable frequency inverter cabinet can balance the reverse power generation energy with the energy consumption of electricity of each pump on the same DC bus, which can increase the mutual feed sharing and recycling of DC bus energy, and avoid power waste and reduce overall energy consumption. After being processed by the digital control system composed of data processing module, touch screen and network module, all production data of oil well is transmitted to Production Command Office in real time. The system adopts data transmission and networking modes such as ZigBeeZIGBEE, GPRS DTU, 433, NB-IOT and etc. It can guarantee the real-time and accuracy of data while reducing the construction capacity. The field data processing module customized by the system adds intelligent judgment function, which can self identify and correct mis-operation.

Structural composition

Controlled inverter energy saving system of oil well group is mainly composed of hardware and software:

The hardware part includes DC power source, frequency conversion mutual feed control cabinet and electric energy feedback device;

The software includes digital control system and data acquisition and transmission system.


Main parameter

Temperature: – 40 ℃ – 80 ℃;

Allowable error peak value: ± 1.0%;

Control distance: ≤ 3000m;

Data transmission delay: ≤ 100ms;

Peak control power: ≤ 1000kW

Power consumption of equipment: ≤ 1kW;

Energy saving efficiency: 30% – 70%;


Functional features

Change decentralized control to centralized control, convenient for monitoring and operation and maintenance;

Change the decentralized transformer to the centralized transformer, improve the efficiency of transformer use, reduce cost input;

Convert AC transmission to DC transmission, reduce the pressure on the inverter rectifier unit, and improve the active power and torque output of the equipment

Add electrical feedback device, and make full use of the power generated by pumping units, reduce the electric energy consumption of oil well, and reduce unnecessary waste;

Select wireless transmission mode to reduce construction and maintenance costs.


A professional after-sales engineer team provides on-site installation and commissioning, repair and maintenance services.

Shandong Shengzhe Petroleum Equipment Co., Ltd. is located in Shengli Oilfield of China, and the place where the Yellow River enters the sea – Dongying City, Shandong Province. Founded in 2013, the company has a registered capital of 60 million Yuan and a covering area of 16985.17 ㎡. It is a supplier of special petroleum equipment integrating research and development, production, sales and technical consulting.

The main products: multi-parameter metering device of Mobile oil well, multi-parameter metering device of crude oil wellhead, multi-parameter metering device of oil well in metering room, unit / branch line multi-parameter metering device, gas metering device for oil and gas wells, automatic water injection device, intelligent medicine feeder, controlled inverter energy saving system of oil well group, hitch valve block skid, wellhead connection skid, etc. At present, the products have obtained multiple certifications such as ISO9001 Quality, ISO14001 environment, OHSAS18001 occupational health management system etc.

By adhering to the business philosophy of “Quality, Reputation and Service”, the company has committed to develop more valuable products in the industry to meet customer demand since its founding. At present, the company has established friendly cooperative relations with many domestic and foreign oil field companies. The company has won a good reputation for its excellent product quality and perfect after-sales service system. It also has a strong leading management team and a professional and enthusiastic sales team, providing effective support for decisive decision making, pleasant communication and high quality service.

With the business objective of “Create a Chinese brand and produce world-class products“,the company’s development goal is to establish a brand influence of “unique products, superior technology and reliable service” in the same industry at home and abroad.

The company has developed transportation and superior geographical location with only 3 hours’ drive from Qingdao, Yantai and Tianjin Port. The company’s general port of departure is Qingdao。 It only takes 1-2 days for shipment, which can satisfy the needs of international customers for fast delivery.

Company leaders and all employees sincerely welcome all the friends both from home and abroad to visit and negotiate and cooperate!

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