Development of drillpipe thread defect detection apparatus;
钻杆螺纹缺陷检测装置的研制
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。
Drill pipe thread gauges
GB/T9253.9-1995石油钻杆螺纹量规
API drill pipe thread
美国石油学会标准钻杆螺纹
Analysis of Screw Thread Structure of Drilling Stem with ANSYS
基于ANSYS的钻杆螺纹结构形式分析
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
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
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
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。
drill ,twist, interchangeable, of base metal
可互换螺纹钻,贱金属制
drill chuck with thread adapter
螺纹联接扳手钻夹头
grout anchored deformed bar
灌浆锚定的螺纹钢杆
double pin sucker rod
两头阳螺纹的抽油杆
"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
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