drill l pipe钻杆
drill l pipe clamp钻杆夹持器
drill l pipe spinner钻杆旋扣器
drill following pipe跟管钻进
drill l pipe stabilizer钻杆稳定器
drill l pipe counter钻杆计数器
drill-pipe string钻杆柱
drill-pipe slips钻杆瓦
There are three domestic companies produce oil drill pipe that caliber is above 5 ". The drill pipe which diameter is smaller than 5" are all relied on imports.
国内生产石油钻杆的三家公司只生产以上钻杆,以下小口径钻杆全部依赖进口。
参考来源 - 小口径钻杆生产线淬火及回火工序的开发设计The optimum design of the drill pipe and reasonable drilling parameter can be well developed based on the data and results in the article, accordingly the using-life of the drill pipe and bit will be also longer.
文中所计算和分析得到的结果，对于优化钻杆结构，采用合理的钻进参数，提高钻杆和钻头的使用寿命是十分有利的。
参考来源 - 勘查钻进钻杆的实验模型与仿真分析N（名词） (in the oil industry) a pipe made of lengths of steel tubing that is attached to the drilling tool and rotates during drilling to form a bore 钻柱