一种基于磁强计和倾角传感器的钻井测斜仪  

Clinometer for artesian well based on magnetometer and inclination angle sensor

作　　者：谢川[1] 

机构地区：[1]重庆工商大学计算机科学与信息工程学院,重庆400067

出　　处：《仪器仪表学报》2010年第10期2357-2362,共6页Chinese Journal of Scientific Instrument

摘　　要：描述了利用两轴倾斜角传感器与三轴磁强计测量钻井过程中的地下钻具顶角、磁方位角和工具面角的方法。针对目前已公开的磁方位角的解算数学模型存在缺陷的问题,结合空间坐标变换、空间直线方程和狗腿角的定义推导出磁方位角的数学模型,并给出了详细的软件和硬件实现方案及测斜仪工作流程。测试结果表明,该方案能获得精准的钻具姿态数据,顶角和工具面角数据非常稳定,磁方位角数据在±1°范围内波动,且成本低廉、体积小巧,是钻井测斜的理想选择。This paper proposes an approach of measuring the vertex angle, magnetic azimuth angle and tool face angle of underground drilling tool with dual-axis inclinometer and triple-axis magnetometer. Aiming at the problem that the openly published magnetic azimuth angle resolving mathematical model has some flaws, a mathematical model of magnetic azimuth angle is deduced based on combining space coordinates transformation, spatial straight line equation and the dog-leg angle definition. In addition, the software and hardware implementation scheme and the workflow of the clinometer are given in detail. Experiment results indicate that this scheme can obtain accurate values of drilling tool posture; the test data of vertex angle and tool face angle are very stable, and the test data of magnetic azimuth angle fluctuate within ±1°. The proposed approach features low cost and small volume and is an ideal choice for drilling measurement.

关 键 词：测斜仪 钻具姿态 倾斜角 磁强计 活动转台 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]