Back weight是什么意思

网络释义

用法例句

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

shoulder dressing tool

钻杆接头端面整形工具

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

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

Defects Analysis on 37CrMnMo4 Drill Pipe Joints

37CrMnMo4钻杆接头缺陷分析

Study on Surface Nanocrystallization of 7A52 Superhard Aluminum Alloy Welded Joint

7A52超硬铝合金焊接接头表面纳米化的试验研究

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

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

tool joint hard band

工具接头的硬合金抗磨圈

Analysis of characteristics of PDC rock bits applied to the hard rock

适用于硬岩的PDC全面钻头特点分析

Machining quality is usually not a problem with the sealing surfaces of outlet connections, but it may impact the threads. This is especially true for the harder materials of construction.

排气口接头的密封表面的加工质量通常不是问题，但它会影响螺纹。对于较硬的建材更是如此。

As the bit drills down, pipe is added length after length .

随着钻头往下钻，管子一段一段地加接上去。

Tribological Properties of Sulfur-nitrade Layer on Drilling Joint Material 35CrMo Steel

钻杆接头材料35CrMo钢硫氮共渗层的摩擦学性能

tapped coil

多(接)头线圈, 抽头线圈