Petroleum equipment--Thread gages for rotary shouldered connections
GB/T4749-1993石油钻杆接头螺纹量规
Threads on rotary shouldered connections for petroleum industry
GB/T9253.1-1999石油钻杆接头螺纹
Longitudinal-cracking Failure Analysis of Box
φ139.7mm钻杆内螺纹接头纵向开裂失效分析
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
Failure Analysis on Tool Joint Expansion of φ88.9mm×9.35mm G105 Drill Pipe
φ88.9mm×9.35mm G105钻杆内螺纹接头胀扣失效分析
Finite element analysis of the screw structure of the drill-stem junction
钻杆接头螺纹结构形式的有限元分析
Drill pipe thread gauges
GB/T9253.9-1995石油钻杆螺纹量规
drill chuck with thread adapter
螺纹联接扳手钻夹头
A study of the surface crack at thread root of tool joint pins by the aid of finite element method.
石油钻杆公接头螺纹牙根部表面裂纹有限元计算
Screwed 1;Screwed 2;Screwed 3;Screwed 4
螺纹接头 1;螺纹接头 2;螺纹接头 3;螺纹接头 4
Screwed Joint 1;Screwed Joint 2;Screwed Joint 3
螺纹接头 1;螺纹接头 2;螺纹接头 3
male and female cross
阳螺纹-阴螺纹十字接头
a round-headed bolt for timber; threaded along part of the shank; inserted into holes already drilled.
加工木料用的圆头螺栓；部分连杆有螺纹；可以插入事先钻出的孔中。
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。
Technical specification for taper threaded splicing of rebars
钢筋锥螺纹接头技术规程
double pin sucker rod
两头阳螺纹的抽油杆
NPT tapered tube thread gauges
NPT锥管螺纹量规
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