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1)  double-wall drill tool
双壁钻具
1.
A double-wall drill tool has been developed to solve problems arising in the process of controlling the wellbore trajectory using conventional downhole mud motor and MWD in under-balanced drilling with aerated drilling fluid.
为解决在充气钻井液欠平衡压力钻井时,使用常规井下动力钻具和随钻测量仪器进行井眼轨迹控制中遇到的技术难题,研制了双壁钻具
2)  double-wall drill pipe
双壁钻杆
3)  thick-wall pipe drilling tool
厚壁管钻具
1.
Special welding machine for narrow clearance of thick-wall pipe drilling tool;
厚壁管钻具窄间隙焊接专用机
2.
It is difficult to perform the friction welding for the thick-wall pipe drilling tool.
针对厚壁管钻具难以进行摩擦焊接的现状,研制了一种厚壁管钻具窄间隙焊接专用机。
4)  double bent PDM
双弯钻具
1.
The method and formula of simplifying double bent PDM to equivalent single bent PDM is presented and the integrated equations applied to DKO and DTU are derived and a step equivalent method of simplifying double bent(mutibent) PDM to single bent PDM is provided.
提出了把双弯钻具简化为等效单弯钻具的方法和公式 ,建立了适用于同向、反向双弯的统一表达式 ,并给出了把三弯 (多弯 )钻具简化为单弯钻具的分步等效方法。
5)  dual tube drill pipe
双管钻具
6)  double shoulder tool joint
双台肩钻具接头
补充资料:古意题徐令壁(一作题著作令壁)
【诗文】:
白云苍梧来。
氛氲万里色。
闻君太平世。
栖泊灵台侧。





【注释】:



【出处】:
全唐诗:卷84_54
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