复杂地层高压旋喷护壁堵漏技术的研究与应用
投稿时间:2022-03-03  修订日期:2022-05-18  点此下载全文
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作者单位邮编
李中明 湖南省水文地质环境地质调查监测所 410129
肖尧 湖南省水文地质环境地质调查监测所 410129
罗婷 湖南省水文地质环境地质调查监测所 410129
中文摘要:复杂地层高压旋喷护壁堵漏技术是设计一种带有特殊喷嘴的旋喷钻具,在复杂地层钻进,尤其是多层段复杂地层和深部复杂地层钻进时,泥浆护壁失效的情况下,将该钻具下到复杂孔段,利用泥浆泵将水泥浆液压入,通过旋喷钻具连续旋转喷射出高压水泥浆切割坍塌垮孔段孔壁,使不稳定孔壁的破碎岩土崩落掉块与水泥浆混合,候凝后,在坍塌垮孔段形成直径不规则的柱状水泥岩土混合体,重新钻穿后,形成有一定强度的“水泥套管”,从而达到同径护壁堵漏的目的。详细介绍了该项技术的旋喷钻具的设计、水泥浆液配方、工艺原理、技术要点、操作要领及生产应用效果。
中文关键词:复杂地层,高压旋喷,旋喷钻具,水泥浆,同径护壁堵漏
 
Research and Application of High Pressure Rotary Jet Grouting Technology for Leakage Stopping in Complicated Formation
Abstract:The high-pressure jet grouting wall plugging technology for complex formations is to design a jet grouting tool with special nozzles to drill in complex formations, especially in the case of multi-layer complex formations and deep complex formations, when the mud protection wall fails. , The drilling tool is lowered to the complex hole section, the cement slurry is hydraulically injected by the mud pump, and the high-pressure cement slurry is continuously rotated through the rotary jet drilling tool to cut the collapsed hole section hole wall, so that the broken rock and soil of the unstable hole wall collapses The lumps are dropped and mixed with the cement slurry. After waiting for setting, a columnar cement-rock-soil mixture with a certain diameter is formed in the collapsed hole section. After re-drilling, a “cement casing” with a certain strength is formed to achieve the same diameter wall protection. The purpose of plugging. The design, cement slurry formula, process principle, technical points, operation essentials and production application effects of this technology are introduced in detail.
keywords:complex formation  High pressure jet grouting  Rotary jet drilling tool  cement slurry  borehole protection and leakage control in the same diameter
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