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The heat treatment of the drill tail is mainly to ensure that the drill tail does not pile up or explode under the high-frequency impact of the piston.For 55SiMnMo steel, when the hardness of the drill tail is in the range of HRC50-54, it will be able to meet the above requirements.

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The principle of selecting the heat treatment process of the drill rod made by the big six-party control: The criterion for choosing the heat treatment process is the degree of improvement of the actual service life of the drill rod.

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The steel used for drilling pipes for wells is a steel pipe used by geological departments for core drilling. It has high strength, good elasticity, is not easy to bend, and is easy to connect. It can be used in conjunction with various coal-fired electric drills or tunnel drilling rigs.