石油钻杆可分为内加厚、外加厚和内外加厚三种类型。
Drill pipes can be divided into three types: IU, EU and IEU.
水井钻杆为外加厚内平式，接头按照石油钻具尺寸加工，也可按照用户要求加工。
Water well drill rod for eue in even -like, attaches according to the petroleum drilling tool size processing, also may defer to the user request processing.
水井钻杆为外加厚内平式，接头按照石油钻具尺寸加工，也可按照用户要求加工。
Water well drill rod for eue in even -like, attaches according to the petroleum drilling tool size processing, also may defer to the user request processing.
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