摘要
为解决传统液压驱动式旋转井壁取心仪存在的驱动钻头扭矩低、岩心收获率低等问题,研制一种基于直流电机驱动钻头、最大扭矩可达8N·m的大直径旋转井壁取心仪。阐述了仪器的结构、性能指标、工作原理,对取心探头作了重点介绍。仪器研制成功后在各油田地质区块得到应用,取心收获率达90%以上。
Traditional hydraulic driven rotary sidewall coring tool have the problems of low bit torque and low core recovery rate.To solve these problems,this paper developed a LargeDiameter Rotary Sidewall Coring Tool(LRCT)with a maximum torque of 8 N·m based on a DC motor driven drill.In addition,a detailed introduction to the coring probe is also made in this article,as well as the structure,performance indicators and working principle of the tool.The tool has been widely used in many geological blocks of different oilfields.According to statistics,the coring recovery rate is over 90%.
引文
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