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Heavy Weight Drill Pipe

Country/Region china
Company Time Rolling Development Limited
Categories Drill Pipe
Telephone +86-411-88079818
ICP License Issued by the Chinese Ministry
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Heavy Weight Drill Pipe

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The wall thickness of the heavy weight drill pipe is between the drill pipe and the drill collar, its structure issimilar with the drill pipe.

It is made from premium alloyed steel. Both its tool joints and middle upset are welded hardbands.

Technical parameters meet with API Spec7-1 Standard.
Time Rolling square kelly is manufactured according to API Spec 7-1. Our square kelly is made from AISI 4145H modified alloy bars quenched and tempered full length. After such heat treatment, its brinell hardness can reach 285-341.

Our kelly’s end, drive cross-section and joint are all processed and tested conforming to API Standard.

Time Rolling Hexagon Kelly is made from AISI 4145H alloy steel. According to API Spec 7.

It is formed by hot forging and fully heat-treated by intermediate frequency induction heat
treatment or 20 m horizontal optical resistance furnace to threads are phosphated, copperized or cold worked.

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