石油钻采工艺2016，Vol.38Issue(2)：151-155,5.DOI:10.13639/j.odpt.2016.02.004
煤层气连通井导向钻井钻头定位方法
Drill bit positioning method based on connected well guidance for coalbed methane
摘要
Abstract
On the basis of the features of low-frequency alternating magnetic field, the mathematical model of low-frequency alternating magnetic field near the magnetic source in drill bit has been set up. According to the measurement principle of measurement-while-drilling (MWD) tool, the measurement coordinate system has been set up, and the method for conversion from magnetic source coordinate system to measurement coordinate system has been derived, so as to form the drill bit positioning method under measurement coordinate system. On this basis, the accurate connection guiding instruments and tools have been designed and made, the drilling process for magnetic guiding connected well has been developed, and the field application has been carried out. The results indicate that:by adding the near-drill-bit magnetic tool to conventional combination of drilling tools, optimizing the parameters, carrying out real-time measurement of trajectory and controlling the trajectory posture, the connection error less than 1m has been achieved in the 730m horizontal section, so that the horizontal well and vertical well can be connected accurately, and the technical support has been provided for the development of coalbed methane.关键词
煤层气/连通井/水平井/磁性导向/导向定位/随钻测量Key words
coalbed methane/connected well/horizontal well/magnetic guidance/guide position/measurement while drilling分类
能源科技引用本文复制引用
曹向峰,管志川,王智锋,孙峰..煤层气连通井导向钻井钻头定位方法[J].石油钻采工艺,2016,38(2):151-155,5.基金项目
中国石油化工集团公司科技攻关项目“磁性导向钻井技术研究”（编号JP10006）。 （）
