| 小口径可膨胀波纹管水力膨胀过程的 数值模拟与试验研究 |
| 投稿时间：2018-10-31 修订日期：2018-10-31 点此下载全文 |
| 引用本文：苏 辉,刘宝林,黄玉文,等.小口径可膨胀波纹管水力膨胀过程的 数值模拟与试验研究[J].钻探工程,2019,46(1):28-33.SU Hui,LIU Baolin,HUANG Yuwen,et al. Numerical simulation and experiment on hydraulic expansion process of expandable liners for small diameter boreholes[J]. Drilling Engineering, 2019,46(1):28-33. |
| 摘要点击次数: 1161 |
| 全文下载次数: 703 |
|
| 基金项目:国家国际科技合作专项项目“复杂深孔小口径可膨胀波纹管及应用技术联合研究”（编号：2015DFR71010） |
|
| 中文摘要:为了确保可膨胀波纹管在φ120 mm地质钻井中实现封隔漏失地层的功能，在合理设计8字形波纹管截面形状的基础上，采用有限元理论模拟了不同壁厚和材料的波纹管水力膨胀成形过程，并进行了室内水力膨胀试验。结果表明：波纹管壁厚越薄，膨胀效果越好，但壁厚必须满足抗外挤强度和抗内压强度条件；适用于φ120 mm井眼的8字形波纹管，其材质应符合如下条件。屈强比≤0.6；延伸率≥25%；抗拉强度σb≥410 MPa；试制的波纹管膨胀后最小外径能够满足后续机械膨胀要求，最大膨胀压力为13.6 MPa，符合钻探现场使用条件。研究结果为波纹管野外试验提供了技术支撑。 |
| 中文关键词:8字形可膨胀波纹管 地质钻探 有限元分析 水力膨胀试验 |
| |
| Numerical simulation and experiment on hydraulic expansion process of expandable liners for small diameter boreholes |
|
|
| Abstract:In order to ensure the sealing function of expandable liners in φ120mm boreholes, based on the proper design of an “8” shape section corrugated pipe, the hydrodynamic expansion forming process of the corrugated pipe with different wall thickness and materials is simulated by using the finite element theory, and the indoor hydrodynamic expansion test is carried out. Under the condition of satisfying the extrusion strength and internal pressure strength, the thinner the wall thickness of liners, the better the expansion effect; the “8” shape section liners suitable for 120 mm boreholes should meet the following conditions: yield ratio≤0.6, elongation≥25%, tensile strength σb≥410MPa; the minimum diameter of the liners after expansion can meet the requirements of subsequent mechanical expansion, and the maximum expansion pressure is 13.6MPa, which meets the requirements of drilling site operation. This provides technical support for field test of the liners. |
| keywords:“8” shape section expandable liner geological drilling finite element analysis hydraulic expansion test |
| 查看全文 查看/发表评论 下载PDF阅读器 |
