The steel pipes used as drill pipe and drill pipe connecting material are induction heated and tempered by high-frequency induction heating equipment, and their service life is greatly improved.

Many people say that the steel pipes used as materials for drill pipes and drill pipes are heated and tempered by high-frequency induction heating equipment, and their service life is much longer than that of traditional equipment. However, some people still do not believe it. Next, The editor will tell you whether this statement is correct.

In the past, most of the connecting materials used in drill pipes for geological drilling and drill pipe connections used normalized steel pipes. This normalized steel pipe has low strength, is easily deformed, and has shallow drilling depth, which affects drilling efficiency. Drill pipe joints are processed in a machinery factory and then subjected to enhanced heat treatment. The produced drill pipe joints have low tensile strength and uneven hardness, which reduces the performance. The low-alloy high-strength steel pipes that use high-frequency annealing equipment for induction heating and tempering treatment overcome the above shortcomings and significantly extend the service life of drill pipes and drill pipe adapters. The steel grades used include 45MnMoB, 30CrMnSi, 40Mn2Mo, etc.

The following table gives the test results of the physical breaking force of drill pipe joints produced by different heat treatment methods. 45MnMoB steel pipes that are induction heated and tempered using high-frequency induction heating equipment are directly processed into drill pipe joints, eliminating the need for users to perform heat treatment and can be used directly. Moreover, the joints have high strength, uniform and stable mechanical properties, and significantly improved service life. Production costs fall.

Physical breaking force of 45MnMoB steel pipe

In short, 45MnMoB, 30CrMnSi, 40Mn2Mo and 40MnMo steel pipes for geological drilling treated by induction heating and tempering have been widely used. The normal cumulative drilling depth is about 5000m without faults, and their service life far exceeds that of normalized steel pipes. . At present, the induction heating quenching and tempering process can be used to produce high-strength geological drilling steel pipes of DZ-85 and DZ-95 steel grades.