2) oil drilling pipe （S135 DPC 5-1/2 inch）
We are the oil drilling pipe manufacturer, and the oil drilling pipe specs we can supplied as follows:
oil drilling pipe Standard: API SPEC 5D, API SPEC 7
oil drilling pipe Uses: For well Drilling
oil drilling pipe Grade: S135
oil drilling pipe Size OD: 5-1/2 inch , WT: 7.11mm - 10.54mm
oil drilling pipe Internal coating: DPC
oil drilling pipe hard binding: ARNCO100 / BOTN1000, ARNCO300 / BOTN3000
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