thread-cutting tool

This paper introduces the correct calculating method of width dimension of top edge, front and rear angles of two side edges and thread profile angle with front angle for lathe tool of trapezoid threads. There are reference values for practical production.

介绍梯形螺纹车刀顶刃宽度尺寸、两侧刃的前后角以及带有前角时牙型角的正确计算方法，对实际生产有参考价值。

Drilling operation in this well was faced with many big challenges, mainly including low ROP, thread gluing of drill collar, drilling tool breaking, large formation dip, enlargement of well deviation, as well as difficult well trajectory control.

该井施工难度大，主要表现在机械钻速缓慢、易出现钻铤粘扣、断钻具，地层倾角大井斜上升问题突出，井身轨迹控制困难。

The interior circumferential wall of the connecting pole can be equipped with the thread hole or the taper hole connecting with a machine tool and an electric drill.

连接柱的内圆周壁上可设有与机床和电钻连接的螺纹孔或锥孔。

Method of Automatic Tool-Setting for CNC Systems of Thread Grinding Machine

螺纹磨床数控系统自动对刀方法

The Development of CNC System Based on PMAC to Thread Grinding Machine Tool

基于PMAC磨螺纹数控系统研制