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Casing and Tubing Standard: API Spec 5CT Grade: H40, J55, K55, M65, N80, L80, C90, T95, C95, P110. Size: 2 3/8" - 20" in various lengths.
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The drill collar is a heavy walled joint of pipe frequently used just above the bit in the drilling string. It provides extra weight just above the bi...
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Drill pipes is a portion of the overall drill string. The drill string consists of both drill pipe and the drill stem which is the tubular portion clo...
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