1.
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。
2.
Drill pipe thread gauges
GB/T9253.9-1995石油钻杆螺纹量规
3.
API drill pipe thread
美国石油学会标准钻杆螺纹
4.
Analysis of Screw Thread Structure of Drilling Stem with ANSYS
基于ANSYS的钻杆螺纹结构形式分析
5.
Threads on rotary shouldered connections for petroleum industry
GB/T9253.1-1999石油钻杆接头螺纹
6.
Petroleum equipment--Thread gages for rotary shouldered connections
GB/T4749-1993石油钻杆接头螺纹量规
7.
Longitudinal-cracking Failure Analysis of Box
φ139.7mm钻杆内螺纹接头纵向开裂失效分析
8.
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
9.
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
10.
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
11.
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
12.
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。
13.
drill ,twist, interchangeable, of base metal
可互换螺纹钻,贱金属制
14.
drill chuck with thread adapter
螺纹联接扳手钻夹头
15.
grout anchored deformed bar
灌浆锚定的螺纹钢杆
16.
double pin sucker rod
两头阳螺纹的抽油杆
17.
"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
18.
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