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Name: Drill Collar Model: Keywords: Drill Collar Brief: Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the "as rolled" surface finish condition. Alternative surface finis...

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Name: Lifting Sub Model: Keywords: Lifting Sub Brief: Lifting sub is the drilling tools used for connect the drill collar without shoulder, finishing the drip up and drip in process with the slips.

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