1) decentralized drill collar
偏心钻铤
2) unbalanced drill collar
偏重钻铤
3) Drill collar
钻铤
1.
Research on a new stress relief groove of drill collar threaded connections;
新型石油钻铤联接螺纹减应力区的研究
2.
Measuring residual stress by blind-hole method for the box connection of Ф158.8 mm drill collar;
用盲孔法测量Ф158.8mm钻铤内螺纹端残余应力
3.
Dynamic load analysis of the drill collar during jarring operations by the FEM
震击作用时钻铤上动载荷的有限元分析
4) drilling collar
钻铤
1.
The study on drilling collar screw-stick,analysis of drilling collar screw thread and test of material and thread parameter have been done.
对钻铤粘螺纹事故进行了调查研究,并进行了宏观形貌和材质分析;对新钻铤材质和螺纹参数进行了检验,并采用不同旋螺纹扭矩对新钻铤试样进行了上卸螺纹试验。
2.
Fractographic and metallographic examination, mechanical testing have been carried out on the failure analysis of the drilling collar.
对钻铤断裂原因进行了断口分析、金相检验和力学性能试验。
5) eccentric bit
偏心钻头
1.
A mechanical model of bottom hole assembly (BHA) with eccentric bits is established and the solution of this model was given by means of numerical method.
采用静力分析的方法,建立了偏心钻头底部钻具组合的力学模型,并完成了对力学模型的求解。
6) eccentric drill tool
偏心钻具
补充资料：偏重
1.不平，不公平。 2.特别看重。 3.着重一方面。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条