旋转钻柱涡动规律的理论分析

A Theorectical Analysis on Whirling Law of Revolving Drillstring

本文对钻柱在井中的运动规律进行了较详细地分析,不仅再次说明了钻柱在本身自转的同时还进行着公转,而且指出了钻柱先是在做正向涡动,然后才可能发展到反向进动。文中给出了钻柱从自转开始直到与井壁发生碰摩或涡动的具体变化过程和条件,并对其力学机理给予了合理地解释。

This paper makes a detailed analysis of drillstring motion law. It is shows again that a drillstring makes revolution during its rotation. It is also pointed out that a drillstring may come into reverse motion only after its positive whirling. Furthermore, the paper presents the changing process and conditions in which a drill-string changes from rotation to bump and friction or whirling in a well , and its mechanism of mechanics is ex- plained reasonably.