工具面动态控制钻井系统的室内研究

Laboratory Study on Tool Face Dynamic Control Drilling System

常规钻井作业中,造斜段一般使用弯角马达滑动钻进完成,易产生工具面漂移,传统方法对工具面调整时需要停钻,易引起作业效率低和卡钻等问题。为此,设计了工具面动态控制钻井系统,并完成软件控制和顶驱角度精确定位系统研制。钻井系统主要由现场监测系统、软件控制系统和顶驱精确定位系统组成。通过实时监测工具面,软件控制系统可自动判断工具面偏移情况并发送指令至顶驱精确定位系统,定位系统调整顶驱角度,从而实现滑动钻进过程中工具面的自动控制。室内试验结果表明,电机无论是在空载、带载还是正反转情况下,顶驱角度精确定位系统的定位精度都控制在2°以内,响应时间不超过4 s。

In conventional drilling operations, bend motor is usually used to drill the buildup section by slide drilling, which often results in tool face drifting. Considering that the traditional method of tool face adjustment needs to stop drilling and may lead to low operating efficiency and sticking, a tool face dynamic control system is designed. Moreover, the control software and the top drive angle accurate positioning system are developed. The system mainly consists of on-site monitoring system, software control system and top drive accurate positioning system. Through real-time tool face monitoring, the software control system can automatically measure the tool face offset and send commands to the top drive accurate positioning system to adjust the angle of the top drive, thus, achieving automatic control of tool face during slide drilling. Laboratory test results indicate that, whenever the motor runs with or without load or rotates positively or negatively, the positional accuracy of the top drive angle accurate positioning system is less than 2° and the response time is less than 4 s.