Chuanqing Drilling's self-developed 625 type rotary steering system has successfully undergone testing.

On May 9th, reporters learned that the CG STEER 625-175 rotary steering system independently developed by Chuanqing Drilling achieved success in its first on-site test. This breakthrough in the development of the key instrument marks that China has acquired a new technological tool to deal with unconventional oil and gas slim wells.

This test was conducted in the Weiyi 217H24-7 well. The 625-type rotary steering system completed a drilling depth of 909 meters in one trip, with a single-trip circulation working time of up to 184 hours and a maximum circulation temperature of 132 degrees Celsius. Compared with adjacent wells with the same wellbore size that used conventional tools for operations, the average mechanical drilling rate in the steeper section increased by 95.84%, the drilling cycle was shortened by 60%, significantly reducing the single-well drilling cost, shortening the well construction period, and improving the development efficiency. This achievement not only fills the application gap of domestic small-diameter rotary steering systems in deep shale gas slim wells, but also provides strong support for the large-scale promotion of small-diameter wells.

As the pace of efficient development of deep shale gas accelerates, there is a lack of rotary steering systems suitable for 7.5-inch wellbores on the market. This technical gap has become a bottleneck restricting the development of the industry. Chuanqing Drilling took the initiative to attack, regarded the development of rotary steering systems suitable for small-diameter wells as an important task, and formed a project team to conduct research. Through coordinating resources such as personnel, finance, and materials, and establishing regular supervision and coordination mechanisms, the CG STEER 625-175 rotary steering system completed the entire process from research to the first well test success within half a year, far exceeding the expectation of industry experts who said it would take at least two years to complete. It is reported that Chuanqing Drilling is currently focusing on the technical pain points of deep shale gas engineering technology, continuously deepening the iteration of key technologies such as small-diameter wells, high-temperature resistance, and high inclination rate.