API 5dp Dstj Xt 39 Type Drill Pipe for 5-1/2

The heat treatment of PUYANG COLAR adopts a unique medium frequency induction heating method for quenching and tempering. During this process, the steel piece rotates continuously to obtain uniform heating. In the hardening process, the circular cooling water is injected inside and outside to achieve uniform and uniform heating. The full length, heat-treated COLAR material ensures a Brinell hardness of 285-341 1 "below the surface of the tube.

Collar diamond collar includes open, spiral grooves, square, oblique and pipe slip, elevator grooves, wear-resistant collar. The drill collar length can range from 10 ft to 30 ft, where 3-1/20 "to 11" outside diameters are commonly used for data information

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The heat treatment of PUYANG COLAR adopts a unique medium frequency induction heating method for quenching and tempering. During this process, the steel piece rotates continuously to obtain uniform heating. In the hardening process, the circular cooling water is injected inside and outside to achieve uniform and uniform heating. The full length, heat-treated COLAR material ensures a Brinell hardness of 285-341 1 "below the surface of the tube.

Collar diamond collar includes open, spiral grooves, square, oblique and pipe slip, elevator grooves, wear-resistant collar. The drill collar length can range from 10 ft to 30 ft, where 3-1/20 "to 11" outside diameters are commonly used for data information