With rising costs in oil exploration and development and an accelerated global energy transition, reducing drilling equipment energy consumption has become a core issue for the industry’s sustainable development. In traditional drilling operations, problems such as insufficient diesel engine load, low transmission system efficiency, and inefficient equipment maintenance result in energy costs per well accounting for over 30%. Driven by both technological innovation and management upgrades, oil companies are exploring a new path that simultaneously reduces costs, increases efficiency, and promotes green transformation.
Technological innovation is a key to solving the energy consumption dilemma. In the power system field, the application of electronic fuel injection (EFI) diesel engines is reshaping industry energy consumption standards. These devices precisely regulate fuel injection quantity and timing through electronic control modules, improving fuel efficiency by over 15%. Data from a certain oilfield shows that drilling rigs using EFI technology save an average of 0.6 tons of fuel per day under the same workload, resulting in annual cost savings exceeding 2 million yuan. Upgrades to the transmission system have also yielded significant results. After replacing traditional hydraulic torque converters with hydraulic couplings, power transmission efficiency jumped from 80% to 95%, not only reducing energy loss but also extending equipment life by buffering torque fluctuations. In the power supply sector, the widespread adoption of reactive power compensation and harmonic suppression technologies has improved the power factor of electric drilling rigs from 0.5 to 0.92, reduced the 5th harmonic content by 86%, and resulted in daily energy savings equivalent to reducing diesel consumption by 0.5 tons.
The refined transformation of equipment management is unleashing enormous energy-saving potential. By establishing a three-dimensional optimization model of “load rate-speed-fuel consumption,” a drilling team increased the load rate of its 12V190 diesel engines from 71% to 90%, reducing fuel consumption by 12%. This dynamic adjustment mechanism based on operating data ensures that each prime mover always operates within its economic range. The improved preventative maintenance system reduces energy waste at the source; measures such as regularly calibrating injectors and adjusting valve clearances improve diesel engine thermal efficiency by 3-5 percentage points. In the equipment configuration sector, the innovative model of utilizing the drilling rig’s surplus power for power generation solves the drilling team’s electricity needs while avoiding the energy consumption of additional diesel generators, achieving cascaded energy utilization.
The integrated application of new energy and intelligent technologies has opened up new dimensions for energy conservation. In the Sichuan-Chongqing region, hybrid power supply systems combining photovoltaic (PV) and energy storage have covered multiple drilling platforms. During the day, PV power generation meets 80% of equipment needs, while the energy storage system provides backup power at night, reducing diesel consumption by 40%. The promotion of intelligent drilling systems automatically optimizes operational processes by monitoring parameters such as drill pressure, rotational speed, and mud flow in real time, reducing energy consumption during non-productive periods. A pilot project of an intelligent drilling rig shows that the system can dynamically adjust drilling strategies based on formation changes, achieving an average energy saving of 18% per well.
At the intersection of energy revolution and industrial upgrading, energy conservation and consumption reduction in oil drilling equipment have transcended mere technical issues, becoming a crucial benchmark for measuring a company’s core competitiveness. From precise fuel control in electronically controlled diesel engines to flexible transmission in hydraulic couplings, from data-driven load optimization to green power supply integrating PV and energy storage, technological innovation is reshaping the energy utilization landscape of drilling operations. The establishment of preventative maintenance systems and the improvement of energy consumption assessment mechanisms are solidifying the foundation for energy conservation from a management perspective. When the energy of every drop of fuel is fully released, and when every unit of electricity consumed generates maximum value, the oil drilling industry will undoubtedly write a new chapter of high-quality development on the dual tracks of cost reduction and efficiency improvement and green development.
