Domestic High-Temperature Power Supply Circuit System for Oil Drilling Achieves Breakthrough, Boosting Deep Oil and Gas Exploration and Development

Beijing, April 15, 2025 — At a critical stage where China's deep oil and gas exploration and development are advancing toward greater challenges and deeper formations, the high-temperature power supply circuit system for oil drilling jointly developed by the Zhongyou Kehao (Beijing) Energy Technology Research Institute and the School of New Energy and Materials at China University of Petroleum (Beijing) has recently passed industrial test verification. It successfully achieved continuous and stable power supply for over 500 hours in a 180°C high-temperature environment, with core indicators reaching the international leading level. This achievement has broken the long-term monopoly of foreign countries on high-temperature drilling power supply technology and provided key equipment support for the efficient development of complex oil and gas reservoirs such as shale gas and deep oil in China.

Conquering the Power Supply Challenge in the 'Underground Furnace' and Breaking Through High-Temperature Technical Bottlenecks

Deep oil and gas drilling faces extreme working conditions such as ultra-high temperatures, high vibrations, and strong corrosion. Downhole temperatures often exceed 150°C. Traditional power supply systems are prone to circuit failures and power outages due to the insufficient thermal stability of electronic components, becoming a "necklace" problem restricting deep drilling efficiency. The developed high-temperature power supply circuit system has achieved technological breakthroughs through three core innovations:

1. Reconstruction of High-Temperature Resistant Device System: Independent research and development of silicon carbide (SiC) power devices and gallium nitride (GaN) driver chips have increased the temperature resistance limit to 200°C, an 80°C improvement over traditional silicon-based devices.

2. Multi-Tier Thermal Management Technology: Integration of micro-channel liquid cooling, nano-insulating coatings, and intelligent temperature control algorithms ensures that the temperature difference of key components is controlled within ±5°C, with a 40% improvement in heat dissipation efficiency.

3. Vibration-Resistant Redundant Circuit Design: Through three-dimensional packaging and flexible circuit board technology, the circuit's vibration tolerance has been increased to 50g (gravitational acceleration), adapting to the high-frequency impact conditions of deep drilling.

Industrial test data shows that the system was applied in a super-deep horizontal well (6,500 meters deep, bottom hole temperature 178°C) in the Sichuan-Chongqing shale gas field, providing continuous power supply for 528 hours without failure, with output voltage fluctuations less than ±1%, and a power density of 300W/in³, a 25% increase over similar imported products.

Accelerating Domestic Substitution and Promoting Cost Reduction and Efficiency Improvement in Deep Oil and Gas Development

For a long time, the high-temperature drilling power supply market has been monopolized by foreign companies such as Schlumberger (USA) and Total (France), resulting in high equipment procurement costs and long maintenance cycles. The successful application of the domestic system has reduced the cost of a single set of equipment by 60% and shortened the maintenance response time to within 24 hours. It is estimated that in deep shale gas development, the system can shorten the single-well drilling cycle by 7-10 days and reduce comprehensive costs by approximately 15 million yuan.

"This achievement marks China's transition from 'following' to 'leading' in the core equipment field of high-temperature drilling," said Dr. Li Ming, the project leader and chief expert of Zhongyou Kehao. The system has been included in the China Petroleum Equipment Domesticization Catalog and is planned to be promoted and applied in 50 sets in deep oil and gas production areas such as the Tarim Basin in Xinjiang and the Sichuan Basin in 2025, with an expected annual foreign exchange savings of over 200 million yuan.

Supporting the 'Double Carbon' Goals and Empowering Green Drilling Technology Innovation

In addition to technological breakthroughs, the system has improved overall conversion efficiency to 96% through energy efficiency optimization design, reducing energy consumption by 40% compared to traditional power supplies and reducing carbon dioxide emissions by approximately 3,000 tons per year. Combined with the supporting intelligent power management system, it can achieve integrated regulation of the 'source-network-load-storage' on drilling platforms, providing a new path for the green and low-carbon transformation of the oil and gas industry.

With the continuous advancement of China's 14th Five-Year Plan for energy development in deep oil and gas exploration, the large-scale application of high-temperature power supply circuit systems will further consolidate the cornerstone of China's energy security and promote the high-end, intelligent, and green development of the oil equipment industry chain.