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四、石油管的品种规格按照石油管的主要用途可分为:油管、套管、钻杆、方钻杆和钻键等五种。根据不同的结构型式,每种管材还可以分为不同的品种。例如,油管有加厚油管和不加厚(平式)油管;钻杆有内加厚钻杆、外加厚钻杆和对焊钻杆。对焊钻杆的加厚部分有内加厚、外加厚和内外加厚三种。按强度级别,石油管可分为高强度石油管和低强度(或普通强度)石油管。在
Fourth, the specifications of the oil pipe According to the main purpose of the oil pipe can be divided into: tubing, casing, drill pipe, drill pipe and drill key five. Depending on the type of construction, each tube can also be divided into different varieties. For example, tubing has thickened tubing and non-thickened (flat) tubing; drill rods have thicker drill rods, thicker drill rods, and butt-welded drill rods. The thicker part of the welding rod has thicker inner, thickened and thickened inside and outside. According to the strength level, petroleum pipes can be divided into high-strength oil pipes and low-strength (or ordinary strength) oil pipes. in