地热井及水文孔止水工艺探讨 .pdfVIP

学兔兔 第25卷9期 中 国 煤 炭 地 质 Vo1．25 No．09 2013年 9月 COAL GEOLOGY OF CHINA Sep． 2013 doi：10．39696．issn．1674—1803．2013．09．15 文章编号：1674一l8O3(2Ol3)O9—0068-03 地热井及水文孑L止水工艺探讨 刘春明 (陕西省煤田地质局水文队，陕西渭南 714000) 摘 要：为克服地热井止水材料在下入孑L内时容易被井壁磨挂、移位，致使止水效果欠佳的缺点，研制了地热井封水 止水器。该封水止水器由不同型号石油套管短节、硅胶板或橡胶板材料和轴承三部分组成。石油套管短节为封水 止水器主体管，硅胶板或橡胶板为止水材料，用于挤压封闭套管底部与孔壁问隙；两挡板防止下管时，止水硅胶板或 橡胶板材料被损坏。实践证明，该封水止水器不仅克服了传统止水材料的缺点，而且简化了钻孑L结构，提高了钻效， 止水效果好。为今后在地热井、煤田水文孔、水文水井施工中的止水工作提供了参考。 关健词：地热井；止水工艺；止水材料；封水止水器 中图分类号：P634．8 文献标识码：A A Discussion on Geothermal Well and HydrOgeol0gicaI Borehole Water Sealing Techniques Liu Chunming (Hydrogeological Exploration Team，Shaanxi Bureau of Coal Geological Exploration，Weinan，Shaanxi 714000) Abstract：To get over disadvantages of geothermal well sealing material lowering easy to scrape，shift and bring about poor sealing ef— feet，therefore geothermal well water stopper developed．The water stopper is composed of different types of oil casing short piece，silica gel phte or rubber plate and bearing three parts．The oil casing short piece is the principal tube，silica gel plate or rubber plate is water sealing material，used to extrude and seal casing bottom and wall clearance；two back plates to prevent silica gel plate or t ubber plate damage during lowering．Practices demonstrated that this water stopper not only overcome weaknesses of conventional sealing material， but also simplified borehole configuration，and improved drilling efficiency with good sealing effect．It provided reference for water seal— ing operation in geothermal w