| 水源钻机在超深土层绳索取心钻进中的应用 |
| 投稿时间：2020-08-04 修订日期：2020-09-23 点此下载全文 |
| 引用本文：杨联锋,段云星.水源钻机在超深土层绳索取心钻进中的应用[J].钻探工程,2020,47(11):44-50.YANG Lianfeng,DUAN Yunxing. Application of water well drilling rig in wire line core drillingin ultra deep soft soil layer[J]. Drilling Engineering, 2020,47(11):44-50. |
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| 基金项目:山西省地勘基金项目“山西省清徐县测区（清徐县幅、徐沟幅）1∶5万覆盖区区域地质调查项目”（编号：HXCT01-2018F005） |
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| 中文摘要:山西省清徐县区域地质调查项目设计800、2000、3000 m科学钻探孔，以调查填补新生界底板埋深控制空白区，各孔钻入基岩30 m完钻。要求全孔取心，岩心采取率≮85%，岩心直径≮60 mm，采用塑料保护管采取原状岩样。针对超深软土层、各组地层特性及厚度未知、钻遇基岩完钻深度未知、大直径高保真全孔取心、项目价格远低于目前市场成本等难题，经过“水源钻机+大提钻取心+长裸眼孔段”实施800 m孔、“岩心钻机+绳索取心+套管固井”实施640 m参数对比孔，创新性使用“水源钻机+绳索取心+长裸眼孔段”工艺完成了2000 m孔的施工。该工艺岩心采取率达到93%，孔径和孔斜符合地质要求，为3000 m孔顺利施工打下了坚实的基础，为同类型项目提供了经验和借鉴。 |
| 中文关键词:水源钻机 科学钻探 超深软土层 大口径 绳索取心钻进 |
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| Application of water well drilling rig in wire line core drillingin ultra deep soft soil layer |
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| Abstract:In the regional geological survey project in Qingxu County, Shanxi Province, scientific drilling holes of 800m, 2000m and 3000m are designed to fill the gap in delineation of the Cenozoic floor burial depth, with each hole completed 30m drilled into the bedrock. Full hole coring is required with the core recovery rate ≮85%, the core diameter ≮60mm, and the undisturbed rock sample to be taken with the plastic protective tube. In light of the difficulties such as ultra deep soft soil layer, unknown characteristics and thickness of each group, unknown drilling depth, large diameter high fidelity full hole coring, far lower contract price than the current market cost, with the 800m hole drilled with “water well drilling rig +conventional coring +long open hole section”, and a 640m parametric hole drilled with “core drill+ wire line coring + casing cementing”, an innovative process of “water well drilling rig + wire line coring + long open hole section” was then developed and used to complete the 2000m hole. The core recovery of the hole reached 93%, and the borehole diameter and deviation met the geological requirements, which lays a solid foundation for the smooth construction of the 3000m hole and provides experience and reference for similar projects. |
| keywords:water well drilling rig scientific drilling ultra deep soft soil layer large diameter wire line core drilling |
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