Drill Collar

Richsen product

HS Code : 7304.23.90
Standard : API SPEC 7-1
Usage : provide a path for pumping drilling
Packing : Steel Belt,Steel Frame

As an important part of drill string, drill collar can supply the drill bit and increase the rigidity of drill string.


Stand size and thread connection

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Cylindrical type drill collar : Be made of alloy steel and the cross sections of the inside and outside pipe are both round.

Spiral Type : Be made of alloy steel and the outside pipe has spiral grooves.

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Non-magnetic : Made of stainless alloy steel with rather low magnetic permeability and the cross sections of the inside and outside pipe are both round.

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