PDC Multi-stage Tower Drill BitsPDC

With professional and productive factory, HAINAISEN is one of the leading China spiral geological drill rod manufacturers. Welcome to wholesale spiral geological drill rod from us, we always have cheap products to offer you.

Geological spiral drill rod

Spiral craft: prestressed wire winding and welding with single strip steel or double strip steel, based on the big torque of geological drill rod.

Material of rod body: geological alloy pipe

Material of connector: first-class alloy constructional steel

Craft: thermal refining in vacuum, which greatly improves the fatigue resistance and shearing strength.

Rod body craft: friction welding, which improves the bending strength and the firmness of the drill rod.
http://www.pdcoiltool.com



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