| 大直径潜孔锤气力反循环流体速度与压力模型 |
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| 引用本文： | 黄勇,殷琨,朱丽红,博坤.大直径潜孔锤气力反循环流体速度与压力模型[J].吉林大学学报(地球科学版),2011(Z1):232-236. |
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| 作者姓名： | 黄勇 殷琨 朱丽红 博坤 |
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| 作者单位： | 吉林大学建设工程学院;中国石油大学石油工程学院; |
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| 基金项目： | 中国地质调查局项目(1212010816018); 吉林大学基本科研业务经费项目(421032194424) |
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| 摘 要： | 为解决大直径潜孔锤反循环钻进技术中气体携带岩屑不彻底和地面供气压力难以控制问题,必须开展循环气体流动参数即速度压力分布研究。根据反循环钻进中流体通道特点对流场分区,采用"倒算法"按循环系统流动的反方向推导各分区流场的气体速度和压力公式,建立流体参数数学模型,并对所得模型进行实例验算。以直径1.2 m、孔深40 m硬岩钻孔为例,钻孔出口流速为40 m/s时,钻头喷嘴气体流速为456 m/s,喷嘴截面积为0.002 4 m2,孔口气体注入压力为1.2 MPa,循环系统压力降约为0.9 MPa。计算结果表明,该模型可为地面气源参数调节和优化喷嘴结构提供依据。
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| 关 键 词： | 潜孔锤 大直径 反循环 速度模型 压力模型 |
Velocity and Pressure Model of Large-Diameter DTH Hammer Pneumatic Reverse Circulation Fluid |
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| HUANG Yong,YIN Kun,ZHU Li-hong,BO Kun .College of Construction Engineering,Jilin University,Changchun ,China .School of Petroleum Engineering,China University of Petroleum,Qingdao ,Sh,ong,China.Velocity and Pressure Model of Large-Diameter DTH Hammer Pneumatic Reverse Circulation Fluid[J].Journal of Jilin Unviersity:Earth Science Edition,2011(Z1):232-236. |
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| Authors: | HUANG Yong YIN Kun ZHU Li-hong BO Kun College of Construction Engineering Jilin University Changchun China School of Petroleum Engineering China University of Petroleum Qingdao Sh ong China |
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| Institution: | HUANG Yong1,YIN Kun1,ZHU Li-hong2,BO Kun1 1.College of Construction Engineering,Jilin University,Changchun 130026,China 2.School of Petroleum Engineering,China University of Petroleum,Qingdao 266555,Shandong,China |
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| Abstract: | The main problems of the large-diameter DTH hammer pneumatic reverse circulation are the incompleteness of gas carried rock fragments and the difficulty of controlling ground gas pressure.In order to solve these problems,drilling circulation system gas flow parameters,or the velocity and pressure distribution,have been researched.On the basis of characteristics of the fluid channel,the flow fields are zoned.According to the opposite direction of the gas circulation system,gas velocity and fluid pressure cal... |
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| Keywords: | hammers large-diameter reverse circulation velocity model pressure model |
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