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为了解决大口径深井水井钻探的需要，上海探矿机械厂和勘探技术研究所共同协作设计研制出QS-500型车装转盘式水井钻机（见外貌图），由陕西省地质局水文一队负责试验，到79年底已钻井二口，第一口井深325米（口径500毫米一径到底），下12″井管成井；第二口井深500米（口径500毫米），下8″及9″管499.5米成井。根据二口井的试验情况，地质部科技局和水文局会同陕西省地质局于79年12月24日在西安市召开有该市五个打井单位参加的技术评议会，对该新产品进行技术评议，认为该钻机基本上能在第四纪地层打500米以内深度的水井。
In order to solve the need of large diameter deep well drilling, Shanghai Prospecting Machinery Factory and Exploration Technology Research Institute jointly design and develop QS-500 type car mounted rotary well drilling rig (see the exterior picture), and the first team of hydrology of Shaanxi Geological Bureau is responsible for testing By the end of 79, two wells had been drilled. The first one was 325 meters deep (with a diameter of 500 mm in the end), and the other 12 wells were completed. The second well was 500 meters deep (with a diameter of 500 mm) and the lower 8 “and 9” tubes 499.5 meters into the well.According to the two wells in the trial, the Bureau of Geology and Hydrology Bureau and Bureau of Geology Shaanxi Bureau of Geology in December 24, 79 in Xi’an City held a meeting with the city’s five drilling units to participate in the technical review of the The new product is under technical review and believes that the rig is capable of playing wells to a depth of up to 500 meters in Quaternary formations.