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
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
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
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。
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。
Main reasons of causing drill collar screw failure are discovered by way of further investigation and analysis on these problems.
通过对钻铤螺纹失效问题的深入调查和分析,找出引起钻铤螺纹失效的主要原因。
5.11 The drill collar O.D. is 7.5 inch, and the drill pipe O.D. is 5 inch.
钻铤外径为7.5” ，钻杆外径为5敗£
Set the make-up torque of9" DC to10000 kg-meter.
钻铤上扣力矩要调到10000公斤米。
Research on Ultrasonic Test Method for Steel Pipe with Heavy Thickness Used in Drill Collar
钻铤用厚壁钢管超声波探伤方法研究
Analysis of Drill Collar Fracture in a Well with H_2S
含H_2S井钻铤本体断裂原因分析
Have you measured those spiral collars and flex joints?Not yet.
你量过那些螺旋钻铤和挠性短接吗？还没有。
Design of Screw Thread for Drill Collar of High Torque Connections and Finite Element Analysis
高抗扭强度钻铤螺纹设计及有限元分析
Failture Analysis of Drilling Collar Thread Connections and Structure Optimization
钻铤连接螺纹断裂失效分析及结构优化
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
The endurance crack is apt to be produced in collar thread during drilling, which eventually results in the connection failure.
在钻井过程中,钻铤螺纹容易产生疲劳裂纹,最终导致连接失效。
Influences of dimensional deviations on contact characteristics of threaded joint with double steps in drill collars
钻铤双台阶螺纹接头尺寸偏差对接触特性的影响
I'll be taking a risk and I don't see why I should take it alone.
我准备铤而走险，但我看不出我为什么非得单干。
At the same time the State Department bureaucracy tended to tempt fate.
同时，国务院的官僚机构有铤而走险的倾向。
No adventurer of this type ever came to a good end!
像这样铤而走险的人是不会有好结果的!
School of Management of State Affairs & Chinese School of Ci-Poem;
经学与词学——离合于常州、浙西二派之间的谢章铤
On Xie Zhangting’s"Ci-qi"Theory
词气理论的成熟形态——谢章铤“词气说”的独特内涵
unit-type drill head
组合钻床钻头, 标准钻头
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
He hated the blackmail, the deceit, the desperation, and the way one always stabbed the enemy in the back.
他讨厌讹诈欺骗手段，铤而走险的方式和暗中伤人的伎俩。