李东力 狄茂 杨宇松

【摘 要】地下水是许多城市的主要水源，水井是开采地下水的重要设施，其在使用过程中容易出现筛管或套管损坏，大量砂子随水流进入井内等现象，造成井中砂面上升影响出水量，这时需要修井。常规修井工艺只是针对漏砂量较小的水井进行的修补措施。根据检测结果，在漏砂量较大时，筛管的漏点多数在砂埋当中，没有外露，要想局部修补就只能先清砂，到露出漏点后再行修补，而目前清砂工艺效率较低，清砂速度没有漏砂速度快，一味清砂会造成含水层结构变化，导致井管断裂，井口坍塌。所以在水井修复中，如果遇上套管、筛管出现较大漏砂时只能报废。针对这一问题，科研人员研究出清砂下衬管一体化修井工艺，该工艺应用高效清砂技术在清砂的同时下入衬管，成功修复了许多漏砂严重的报废水井。

【关键词】修井工艺、清砂、下衬管、一体化、应用

Abstract: The groundwater is the main water source for many city, groundwater wells is important infrastructure, the appears easily in use process screen pipe or casing damage, large amounts of sand with the flow of water into the well and other phenomena, resulting in well sand surface effect of rising water, then the need for well repairing. Conventional workover technology only for sand leakage the small amount of wells for repairing measures. According to the test results, the sand leakage when the amount is larger, sieve tube leakage mostly in sand buried, not exserted, to local repair will first clear sand, exposed to leak after repair, and the sand removal technology in low efficiency, no leakage of sand sand cleaning speed fast, a sand will causing aquifer structure changes, leading to the well pipe fracture, well collapse. So in the well repairing, if casing, screen appear larger sand leakage can only be scrapped. Aiming at this problem, the research of clearing sand liner integration workover technology, application of the technology of Gao Xiaoqing sand technology in the sand and into the liner, successful repair of a lot of sand leakage serious waste water.

Key words:workover technology; cleaning; lower liner; integration; application

中图分类号：TE373 文献标识码：A文章编号：

一、主要研究内容及技术关键点

本文针对水井的套管、筛管出现较大漏砂无法修复的情况，研究一种可以在高效清砂的同时下入衬管，阻断砂子涌入的修井工艺。

技术关键点：清砂下衬管一体化修井工艺技术方案的设计。

在清砂与下衬管一体化施工中，衬管需要套在清砂装置外侧，清砂装置的外径在100-200mm之间，因此所选衬管的管径必须大于清砂装置外径。在该工艺施工时，衬管容易受到砂子的挤压、摩擦，需要选择抗挤压、摩擦的管材。……