Flash weld tool joints

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Annually various types of products are awarded with high-quality marks in «The Best Goods and Services of the Republic of Tatarstan» and «100 Best Products in Russia» competitions.

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TMC Group Managing Company LLC manufactures and supplies flash weld tool joints.

Details

The company manufactures and sells GOST 27834 weld tool joints for drill pipes as per GOST R 50278 and also manufactures weld tool joints with threaded connections for drill pipes produced by HILONG Solution.

High-alloy steels of domestic production, heat treated and with improved mechanical properties of steels are used for manufacturing weld tool joints.

The threaded profiles of tool joints are subjected to the process operation of ‘‘cold galvanizing’’ to reduce the coefficient of friction and heat between the tool-joint threads, and eliminate the effect of "cold welding" and thread pitting when make-up and breakout during the operation of drill pipe.

Advantages

Coating of threaded parts of the tool joint — cold galvanized.
Quality control of metal and threaded parts of the tool joint: ultrasonic flaw detection (UT) — control, magnetic particle inspection of the thread profile of tool joints (MPI) — control.

Characteristics

Lock steel material	30HGSA steel
Lock body hardness	HB 300…335
Length of the nipple part of the lock, mm	300
Length of the coupling part of the lock, mm	330
The diameter of the lock for welding, mm	135 to disembark the pipe bod
Outer diameter of the lock, mm	162
Internal passage diameter of the lock	95
The length of the keyed coupling part of the lock, mm	255
The length of the keyed nipple part of the lock, mm	180
Lock thread	HL 50 (З-133)
Temporary resistance of the lock metal, MPa (kgf/cm2)	981 (100)
Yield strength of the lock metal, MPa (kgf/cm2), not less	832 (85)