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Drill Collar

Standard: API Spec7-1, API Spec7-2 and API RP 7G, DS-1 and NS-1.

Size: 3 1/8”~11”

Type: Slick / Spiral / Non-magnetic.

Connection: API NC23 to NC70, 6 5/8REG, 7 58/REG, 8 5/8REG

Hard band: ARNCO series, DURABAND and TCS series. 

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