| 轻型钻机在西部山区深厚覆盖层水电勘探中的应用 |
| 投稿时间：2010-11-01 修订日期：2011-03-16 点此下载全文 |
| 引用本文：叶桂明,徐毅青.轻型钻机在西部山区深厚覆盖层水电勘探中的应用[J].钻探工程,2011,38(3):68-70.YE Gui-ming,XU Yi-qing. Application of Light Rig for Drilling in Deep Overburden Layer of the Western Mountains[J]. Drilling Engineering, 2011,38(3):68-70. |
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| 基金项目:浙江省自然科学基金资助项目(Y107710)；“十一五”国家科技支撑计划“村镇住宅地质灾害技术与标准研究”（2008BAJ08B14-06）；上海市重点学科（地质工程）建设项目（B308）资助 |
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| 中文摘要:在西部山区水利水电勘探中，采用轻型钻机钻进深厚覆盖层，并成功采集岩心是一项技术难题。钻进深度越大，越易产生坍塌、埋钻等事故，因而成孔极其困难。根据目前西部水利水电勘探的常用设备，采用轻型钻机，合理设计钻孔，并对泥浆护壁方法进行改进，使钻孔成功达到预定深度。应用结果表明：轻型钻机钻进深厚覆盖层时，孔身设计分为4级变径；深度70 m以浅采用硬质合金钻头，深度70 m以深采用孕镶金刚石钻头，钻进稳定；SM-KHm超低固相泥浆护壁，不仅环保而且节水，可有效保护孔壁稳定，防止塌孔；岩心采取率达到95%以上，钻孔最大钻进深度达到22354 m，有效突破了轻型钻机的最大钻进深度，为轻型钻机钻进西部山区深厚覆盖层及取心提供重要的技术参考依据。 |
| 中文关键词:水利水电勘探 轻型钻机 深厚覆盖层 钻探取心 SM-KHm超低固相泥浆 |
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| Application of Light Rig for Drilling in Deep Overburden Layer of the Western Mountains |
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| Abstract:It is a difficult technical problem for drilling in deep overburden layer with light rig and collecting core in the western mountains. Pore-formation became more difficult with collapsing and drill burying in deeper drilling. By the reasonable design and improvement on mud protection, the borehole reached the depth. The application results show that the drilling hole design was divided into 4-stages variable diameter, drilling with bits of different materials; SM-KHm ultra-low solid-phase slurry-supported was adopted in the alluvial medium-fine sand layer and diluvia gravel soil layer for borehole stability; the maximum drilling depth reached 22354m with more than 95% collecting rate of drill core. |
| keywords:the exploration of water resources and hydropower light rig deep overburden layer coring SM-KHm ultra-low solid-phase slurry |
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