| Message: | OCTG casing and tubing pipes for petroleum and natural gas industries API5CTTubing and casing strings are the main parts of the well construction. All wells drilled for the purpose of oil or gas production (or injecting materials into underground formations) must be cased with material with sufficient strength and functionality.STANDARD:API SPEC 5CTGRADES:StandardGradeAPI5CTJ55、L80、N80-1、N80Q、C90、T95、P110 url:http://www.ruichengsteel.com |
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