... 内加厚钻杆 internal upset drill pipe 内平型钻杆接头 internal flush tool joint 内燃机驱动钻机 internal combustion engine drive rig ...
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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.
研究表明，在钻杆管端加厚过程中所形成的内加厚过渡带的形状对钻杆的使用寿命有显著影响。
Research shows that fatigue life of drill pipe was influenced by the geometric shape in intermediate belt formed during the end upsetting process.
对某油田2004年钻杆刺穿情况进行了调查研究，得到钻杆内加厚过渡带部位刺穿是钻杆刺穿失效的主要形式。
This paper presents an investigation on the condition of drill pipe wash out occurred in 2004 in one oil field, and statistic analysis on the different type of drill pipe wash out were carried out.
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