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随钻堵漏工具旋流喷嘴优化设计及应用
断块油气田
2018年 25卷 第01期
阅读：113
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Title
Optimal design and application of vortex nozzle for plugging tool while drilling
单位
中国石油大学（华东）石油工程学院，山东 青岛 266580
Organization
College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
摘要
随钻堵漏工具利用射流对井壁合理的冲击作用，使堵漏钻井液能够迅速进入漏层，在井壁形成低渗、承压能力较高的泥饼，达到防漏堵漏的目的。在分析随钻堵漏工具工作原理的基础上，设计了随钻堵漏工具旋流喷嘴，并利用COMSOL软件分析了其叶片数、喷嘴出口直径、喷嘴安装角度等结构参数对侧向旋转射流的影响规律。根据分析结果，三叶片叶轮、喷嘴出口直径7~8 mm、安装角度为0°时形成的旋转射流效果最优。大港滨海区块2口井的现场试验表明，随钻堵漏工具可大大提高堵漏地层的承压能力，防漏堵漏效果明显提高。
Abstract
The plugging tool while drilling can make use of the reasonable impact of the jet to the borehole wall, so the plugging drilling fluid can rapidly enter the leakage layer and form mud cake with low permeability and pressure-bearing ability in the borehole wall. On the basis of analyzing the working principle of the plugging tool while drilling, this paper completes the design of swirl nozzle of the tool and analyzes the influence of the swirl nozzle′s structure parameters which include blade number, nozzle outlet diameter and nozzle mounting angle on the formation of swirling jet. Finally, it is obtained that the formation of rotating jet effect is optimal with three blades impeller, nozzle outlet diameter with 7￣8 mm, zero installation angle and the results are applied to two wells in Dagang Binhai Block. The effect of leak prevention and sealing is improved obviously.
关键词：
随钻堵漏;
旋流喷嘴;
优化设计;
数值模拟;
现场试验
;
Keywords:
plugging while drilling;
swirl nozzle;
optimization design;
numerical simulation;
field test
;
DOI
10.6056/dkyqt201801027
论文详情