The North China Petroleum Administration Drilling Company II has significantly boosted its drilling efficiency through enhanced technical management and innovation. By mid-December, the company successfully completed 40 wells in the Sulige market, drilled 40 wellbores, and achieved a total of 13 million meters of drilling. The average monthly drilling speed per rig reached 5,305 meters, while the mechanical drilling rate improved to 16.35 meters per hour—an increase of 800 meters and 2.67 meters per hour compared to previous periods.
Rapid drilling is a key strategy for reducing costs and improving operational efficiency. To achieve this, the Sulige project department adapted its approach based on site conditions and construction challenges. They introduced and implemented the "Plug-type Well Group Technical Management Regulations" and other technical initiatives. Starting from the second round of this year, the company fully transitioned to PDC bits, replacing the traditional roller cone bits. This shift led to a significant improvement in mechanical drilling speed. Last year, the average mechanical drilling speed was 23.52 meters per hour, which increased to 40.12 meters per hour this year—reducing the drilling cycle by nearly 50%.
In the second stage of drilling, the company selected blade bits with high wear resistance, strong composite material hardness, and dense tooth coverage. When used with appropriate drilling pressure, these bits can achieve up to 700 meters per day, which is over 100 meters more than before. After reaching 2,000 meters, the mechanical drilling speed remains consistently above 27 meters per hour.
In terms of drilling fluid management, the North China Drilling Company II opted for a drilling fluid system specifically designed for the Ordos block of the Sulige gas field. This system effectively addresses issues such as well leakage, borehole instability, and damage to oil and gas reservoirs, ensuring smoother and more efficient operations.
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