1.
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
2.
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。
3.
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
4.
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
5.
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。
6.
drill ,twist, interchangeable, of base metal
可互换螺纹钻,贱金属制
7.
drill chuck with thread adapter
螺纹联接扳手钻夹头
8.
Secondly there is error between thethread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
9.
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£
10.
"Drill & tap for M16X2-1.38 Deep NPT,16 places for cover plate mounting screw"
钻孔,攻出一只M16X2-1.38深NPT螺纹,16处,该螺纹应与盖板固定螺丝配套
11.
Discussion on the Design of Drilling String Thread for Complex Drilling Conditions
适应复杂钻探条件的钻探螺纹设计探讨
12.
Threads on rotary shouldered connections for petroleum industry
GB/T9253.1-1999石油钻杆接头螺纹
13.
Petroleum equipment--Thread gages for rotary shouldered connections
GB/T4749-1993石油钻杆接头螺纹量规
14.
Drill pipe thread gauges
GB/T9253.9-1995石油钻杆螺纹量规
15.
API drill pipe thread
美国石油学会标准钻杆螺纹
16.
Longitudinal-cracking Failure Analysis of Box
φ139.7mm钻杆内螺纹接头纵向开裂失效分析
17.
Cause Analyses of Pin Joint Fracture of 139.7 mm Heavy Weight Drill Pipe
139.7mm加重钻杆外螺纹接头断裂原因分析
18.
Analysis of Screw Thread Structure of Drilling Stem with ANSYS
基于ANSYS的钻杆螺纹结构形式分析