| 深部钻探绳索取心跨口径钻具的应用研究与拓展 |
| 投稿时间：2023-05-04 修订日期：2023-06-21 点此下载全文 |
| 引用本文：杨芳,张明德,王勇军,等.深部钻探绳索取心跨口径钻具的应用研究与拓展[J].钻探工程,2023,50(4):25-31.YANG Fang,ZHANG Mingde,WANG Yongjun,et al. Research and development of cross-diameter wire-line coring system in deep drilling[J]. Drilling Engineering, 2023,50(4):25-31. |
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| 基金项目:山东省地矿局地质勘查引领示范与科技攻关项目“3000m超深科学钻探关键技术研发应用”（编号：KY202102）、“深孔地质岩心钻孔轨迹控制技术研发及应用”（编号：KY202205）、“高温地热超深孔勘查取芯钻探关键技术研究与应用”（编号：KY202219） |
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| 中文摘要:在深部地质岩心钻探中，绳索取心是最常用的钻进工艺。由于绳索取心钻进环状间隙小，需要采取加大钻头的方式，解决泵压高、“激动”压力大造成孔壁失稳等问题。深孔施工在不下套管的情况下直接将钻头加大到上一级口径，可以解决环状间隙问题，还能多出一级备用口径。通过对绳索取心钻杆能力进行分析，研制了跨口径系列绳索取心钻具，并在实践应用中不断改进，为深部地质岩心钻探的钻孔结构设计和复杂地层钻进提供了保障，应用效果良好。为满足地热钻探的长孔段取心要求，提出了大口径绳索取心钻具的设计方案，进一步拓展了绳索取心工艺的使用范围。 |
| 中文关键词:口径系列 绳索取心钻具 钻杆能力 深部钻探 地热钻探 |
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| Research and development of cross-diameter wire-line coring system in deep drilling |
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| Abstract:Currently in the field of deep geological core drilling，wire-line core drilling is the most commonly used drilling technology. Owing to annular size of wire-line core drilling is smaller， have no choice but to adopt the method of enlarging the drill bit， solve problems such as high pump pressure and high excited pressure causing hole-wall instability. In deep hole construction， the problem of annular clearance can be solved by increasing the drill bit to the upper caliber without lowering the upper casing. There is also an additional level of spare caliber. This article analyzes the drill pipe capacity of wire-line coring drilling， The theoretical basis for cross bore wire-line coring tools is proposed. The drilling tool has been designed and processed in a complete set and continuously improved in application practice. It provides great help for drilling structure design and complex formation drilling in the field of deep geological core drilling， Achieve good application results. In order to meet the requirements of long hole coring in geothermal drilling， a design scheme for large diameter wire-line coring tools was proposed， further expanding the scope of use of wire-line coring. |
| keywords:diameter series wire-line core drilling tools drill pipe bearing capacity deep drilling geothermal drilling |
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