left-hand tool joint thread

Failure analysis of drill pipe box;

钻杆内螺纹接头纵裂与刺穿失效分析

Longitudinal-cracking Failure Analysis of Box

φ139.7mm钻杆内螺纹接头纵向开裂失效分析

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

Threads on rotary shouldered connections for petroleum industry

GB/T9253.1-1999石油钻杆接头螺纹

Petroleum equipment--Thread gages for rotary shouldered connections

GB/T4749-1993石油钻杆接头螺纹量规

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

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 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

reducing extension piece

异径内外螺纹管接头

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。

double pin sucker rod

两头阳螺纹的抽油杆

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

Assembly consists of thumb screw, hooks, swivel joint, and stem, threaded at one end.

这种总成由翼型螺丝、钩、转接头和杆子组成，在一端上有螺纹。

The R&D of Contactless CAT System on Joint Inner Thread;

非接触式管接头内螺纹CAT系统的研究与开发