en.Wedoany.com Reported - Sunward's SWDM series extended-range rotary drilling rigs have recently demonstrated their practical operational performance in multiple key transportation projects across China. In the Weirong Expressway expansion project in Pingdu, Qingdao, Shandong Province, the SWDM520E extended-range rotary drilling rig conducted pile foundation construction in slightly weathered granite strata, with pile diameters of 1.2 meters and hole depths of 15 to 17 meters. When operating in extended-range mode, fuel consumption was approximately 10 liters per hour, lower than the performance of comparable fuel-powered equipment, earning customer recognition.
In the Changsha-Ganzhou project, the SWDM620E extended-range electric rotary drilling rig faced complex geological conditions including dolomitic limestone, inclined rock, and irregular karst caves. As the world's largest extended-range electric equipment model, its output torque reaches 620kN·m, with a maximum drilling depth of 145 meters. The first pile hole completion took 12 hours, consuming 1,680 kWh of electricity, with energy costs saving approximately 70% compared to fuel-powered models of the same class, reducing single-hole costs by nearly 3,500 yuan. Operators reported that hole deviation and pipe sticking in inclined rock and karst cave formations were effectively controlled.
In the construction of the Mianyang-Suining-Neijiang Railway in Sichuan, the SWDM420E adopted a two-step construction method of "circular pile pilot hole drilling followed by hydraulic milling square," performing square retaining pile construction on a narrow and elongated slope platform. Under the same working conditions, fuel-powered rotary drilling rigs consume approximately 55 liters of fuel per hour, while the SWDM420E consumes 100 kWh of electricity per hour, achieving energy savings of up to 80%. The direct motor drive design ensures torque stability under heavy-load operations, with the flatness and verticality of the completed pile walls meeting design standards.
Sunward stated that the SWDM series extended-range rotary drilling rigs have achieved breakthroughs in key technologies such as multi-motor synchronization, sudden load motor buffering, main winch potential energy feedback, and intelligent thermal management control, featuring high reliability and low energy consumption, capable of providing equipment support for project construction. The performance in three different projects has confirmed the equipment's energy-saving advantages and its ability to handle complex geological working conditions. Sunward will continue to optimize product performance, providing customers with efficient equipment and service support.
This article is compiled by Wedoany. All AI citations must indicate the source as "Wedoany". If there is any infringement or other issues, please notify us promptly, and we will modify or delete it accordingly. Email: news@wedoany.com
