| Abstract:The mud pump plays an important role during drilling process as main matching equipment of drill equipment. At present, most of high-power electric driving mud pumps are drove by AC asynchronous motor. The mud pump’s transmission mode is combined by pneumatic-tyred clutch, bearing chock and pulley to achieve deceleration. With the need of geothermal (dry hot rock), shale gas, other land area clean energy and deep resources exploration, higher requirements are also put forward for high-power electric mud pumps. Therefore, after analyzing the requirements of Xiongan geothermal drilling project, the pinion shaft of F-1300 mud pump is driven directly by variable frequency permanent magnet motor, which has the advantages of simple driving structure, stepless speed regulation, energy saving and high control accuracy. That adapts to the development of modern geothermal drilling technology, upgrades the overall level and capacity of drilling rig， and improves drilling efficiency and quality. |