一种新型割管器的设计与应用

在岩心钻探工程施工中，发生孔内事故在所难免，钻杆、钻具、套管被抱死或卡死的情况时有发生。通常用反丝钻杆进行处理，但无法保证在理想的位置脱开。为了继续施上的需要或从减少经济损失的角度，要使管材在需要的位置断开，使用割管器足常见的处理方法。通过工程实践，设计了一种新型割管器，不仅工作性能可靠，而且与以往使用过的其它类型割管器相比，具有结构简单、操作方便、使用范围广（最小可割内径为φ60mm的管材）、工作效率高等特点，其结构和原理具有通用性，值得推广应用。

Design of New Pipe Cutter and the Application

In the core drilling construction, downhole accident is unavoidable and the block of drill pipe, drilling tools and casing are frequently occur. Reverse thread drill pipe cannot get off the block at ideal position and the pipe cutter is com- monly used to continue the construction to reduce the economic loss. A new pipe cutter was designed in the engineering practice with reliable working performance; comparing with previously used pipe cutters, it has characteristics of simple structure, easy operation, wide application range （pipe with minimum inner diameter of 60mm can be cut）, high working efficiency and good generality.