Finer Thread Drill Pipes is used for geological prospecting,water well drilling,eothermal well drilling project,etc. The finer thread drill pipe is a kind of drilling toolconnected to lock joint, The rod material is selected from Shanghai Bao-steel STM-R780(42MnMo7),which is not easy to bebent or broken,and the performance is stable and reli-able.The rod end is heated by medium frequency,hy-draulically upsetting,and 12 hours of buried temperingto ensure the compactness of the drill pipe and improvethe mechanical performance.