热熔法井壁加固技术研究  

Study on Hot-Melt Sidewall Strengthening Technology

作　　者：卢春华[1] 吴翔[1] 王强[1] 

机构地区：[1]中国地质大学工程学院,湖北武汉430074

出　　处：《地质与勘探》2012年第5期1034-1038,共5页Geology and Exploration

基　　金：中央高校基本科研业务费专项资金项目(编号CUGL100216);岩土钻掘与防护教育部工程研究中心开放研究基金(编号201103)

摘　　要：井壁失稳是钻井过程中普通存在、并一直困扰钻井界的一个技术难题。采用传统井口下入套管法能够可靠隔离失稳坍塌孔壁,但同时也存在众多不足:如井径缩小、费时费力、增加成本和工期,并可能导致孔内事故。为了寻求一种简单可靠、快速有效支护坍塌井段,同时又不缩小井眼口径的方法,项目组致力于研究一种新型热熔法井壁加固技术,该方法通过发热体把颗粒状热熔材料加热熔化后挤入井壁裂隙中,将破碎岩块粘结起来达到加固井壁的目的。论文详细阐述了发热体的设计、热熔材料的选型以及室内对设计的人工模拟井壁的加固试验。研究表明:该法切实可行,井壁加固效果明显。Instability of sidewall is a common problem existing in the drilling process which puzzled the drilling industry. The traditional way of casing can isolate instability sidewall reliably. However, it has some drawbacks such as reduction of hole-diameter, time and power consumption, increase of cost and work duration, and even drilling accidents. The project team devoted to research a kind of simple, reliable, fast and effective way for supporting hole well, which will do not reduce hole-diameter at the same time. This new method melts the granular hot melting material, and squeezes it into the sidewall cracks to attain the purpose of reinforcing sidewall. This paper elaborates the design of the heating element, hot melt materials selection and indoor artificial simulation of sidewall reinforcement test. The result indicates that this new method is feasible and able to attain obvious strengthening side- wall effects.

关 键 词：热熔法 井壁加固 热熔材料 

分 类 号：P642[天文地球—工程地质学]