Growing Competition in the Oil Extraction Market
Competition in the oil extraction industry is growing at a tremendous pace, and companies need to invest more in development in order to remain competitive. One of the most important tasks that is constantly in focus is improving the efficiency of well operations and reducing energy costs during oil extraction. Much of the development in this field focuses on electric centrifugal pumps (ECP), as they are the most widely used. However, regions like Bashkiria and Tatarstan require cutting-edge solutions for the automation of rod pumping units (RPU).
Criteria for Effective Operation of RPU
The main criteria for the effective operation of automation systems (AS) for RPUs are:
- Increasing production.
- Reducing costs.
Factors that positively influence the increase in production:
- Automation of maintaining maximum productive levels with monitoring of well conditions and pump filling.
- Reducing well downtime.
- Improving the accuracy of well performance assessment.
Factors that contribute to reducing costs during well operation:
- Reducing repair expenses.
- Optimizing equipment operating modes.
- Preventive diagnostics of system deviations.
- Reducing energy consumption.
Application of FR-A741 in Automating RPU Operations
The frequency inverter FR-A741, developed by Mitsubishi Electric, is a new achievement in the automation of RPUs. Along with it, a unique motor-generator has been created that provides significant benefits in energy savings.
This solution allows for the recovery of "excess" electricity generated during the operation of the motor in generator mode. Energy savings can reach 30% or more, whereas previously excess energy was simply dissipated as heat. Additionally, this system helps reduce the footprint of the installation, as powerful cooling systems are no longer needed.
Advantages of FR-A741 Compared to Standard Systems
The FR-A741 inverter has several advantages:
- Energy recovery (all produced electricity returns to the system when braking the motor).
- No resistors and external braking unit (EBU).
- No heating during braking.
- Easy installation.
- Cost-effective design.
- Integrated line reactor.
With the built-in line reactor and the lack of an EBU, electrical installation work is significantly simplified. The number of wires from the network is reduced by 40%, and the space occupied is reduced by 60%.
Reliability and Long Service Life
The FR-A741 is a new development in the line of frequency inverters, which also includes the FR-A70, which has proven itself professionally in the market. The main features of this model include:
- High quality of component base, characteristic of Mitsubishi Electric products.
- Reliability and overload resistance.
- Existence of a self-diagnostic system that increases the system's resistance to failures.
- Suitability for networks with unstable voltage.
- Operation in temperature ranges up to +50 degrees Celsius.
- Automatic restart after a short power failure.
- Convenient maintenance.
The estimated service life of the inverter is 10 years and includes heat-resistant capacitors and sealed bearings in the cooling system.
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