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随着金刚石钻进的发展和绳索取心钻具的推广使用，必须用无切口接头连接钻杆，为了解决机械化拧卸问题，重庆探矿机械厂设计试制了无切口自动夹持拧管装置，并初步装配在油压拧管机上，进行了试验。该装置适用于φ53毫米或φ43毫米两种无切口接头连接的钻具，最大通孔直径70毫米，承受最大负荷3吨，如去掉该装置还可恢复原拧管机的性能。
With the development of diamond drilling and the promotion of rope coring drilling tools, it is necessary to use non-cutting joints to connect the drill pipe. In order to solve the problem of mechanized screwing, Chongqing Prospecting Machinery Factory designed and manufactured a non-cutting automatic clamping screw pipe device Preliminary assembly in the hydraulic pipe twist machine, the test. The device is suitable for two φ53 mm or φ43 mm non-cutting joints connected to the drill, the largest hole diameter 70 mm, to withstand the maximum load of 3 tons, such as removing the device can restore the performance of the original screw machine.