bit face

shoulder dressing tool

钻杆接头端面整形工具

hard banding of tool joint

钻杆接头表面加硬圈

hard facing of tool joint

钻杆接头表面加硬层

tool joint for well-drilling machines

工具接头,钻井机用

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

Defects Analysis on 37CrMnMo4 Drill Pipe Joints

37CrMnMo4钻杆接头缺陷分析

A tool used for drilling.

钻头用于钻孔的工具

tools to tubing substitute

钻具连接油管的接头

Research and Application of the Techinic of Bridge Floor Treatment by Helicoid Hydraulic Motor

螺杆钻具处理塞面工艺技术研究及应用

A pointed and threaded tool for drilling and boring that is secured in a brace, bitstock, or drill press.

钻头曲柄、钻柄或钻床之上用于钻孔的尖头工具

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

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

Analysis on balling up caused by helicoid hydraulic motor bypass valve failure in combined drilling technology

复合钻井过程中螺杆钻具旁通阀刺漏造成钻头泥包分析

Lighting pole welding deformation control in beacon engineering at Baotou Stadium

包头市体育场灯塔工程灯杆焊接变形控制