钻柱涡动分析及防涡稳定器设计

Swirling analysis of drilling strings and anti-whirl stabilizers design

李子丰 王兆运 阳鑫军 田新民

LI Zifeng WANG Zhaoyun YANG Xinjun TIAN Xinmin

燕山大学，河北秦皇岛066004

Yanshan University, Qinhuangdao 066004, China

钻井时钻柱在绕自身轴线旋转的同时，还发生绕井眼的涡动，钻柱的涡动对钻柱有很大危害。在分析了钻柱涡动机理以及涡动角速度的基础上，从其结构上指出了现有的稳定器涡动时对钻柱的破坏作用。设计了利用稳定器主体在螺旋套内可自由旋转原理来防止或减少钻柱涡动从而减少对钻柱破坏的新型防涡稳定器。分别介绍了圆柱滚子轴承稳定器和滑动轴承稳定器两种稳定器的结构以及各自的特点，并且与辊子稳定器进行了对比分析，指出防涡稳定器具有防涡或减涡的优点，且工作可靠、结构简单，应用前景广阔。

The drill string revolves around both of its axis and the borehole while drilling. The revolving is called swirling. It is harmful to drilling strings. In this paper, on the basis of analyzing the swirling principle of drill strings and the angular velocity of swirling, the structural damage of the currently used stabilizers to the drilling string is analyzed. A new type anti-whirl stabilizer is designed. The main body of the stabilizer can revolve freely to prevent or reduce the drilling string swirling, so as to reduce the damage to the drilling string. From the perspective of the swirling devices, the anti-whirl stabilizer can be divided into the cylindrical roller anti-whirl stabilizer and the sliding bearing anti-whirl stabilizer. The structure and characteristics of the two types of stabilizers are separately introduced, and the correlation analysis between them and the rolling stabilizers. It is mentioned that the anti-whirl stabilizer has such advantages as swirling prevention or reduction. It is also features in reliability and simple structure. It has broad prospect for application.