基于SPH方法粒子射流破岩数值模拟与实验研究

赵健; 张贵才; 徐依吉; 周毅; 王瑞英; 邢雪阳; 李建波

doi:10.11883/1001-1455(2017)03-0479-08

基于SPH方法粒子射流破岩数值模拟与实验研究

doi: 10.11883/1001-1455(2017)03-0479-08

赵健^{1, 2,},
张贵才^{1, 2},
徐依吉¹,
周毅¹,
王瑞英¹,
邢雪阳¹,
李建波³

1.
中国石油大学(华东)石油工程学院, 山东青岛 266580
2.
中国石油大学(华东)科学技术研究院，山东东营 257061
3.
中海油能源发展股份有限公司安全环保分公司，天津 300450

基金项目:

中石油科学研究与技术开发项目 2015F-1801

第58批中国博士后基金项目 2015M582167

中央高校基本科研业务费专项项目 16CS02061A

山东省自然科学基金项目 ZR2016EL10

青岛市应用基础研究项目 16-5-1-37-jch

详细信息

作者简介:
赵健 (1987—)，男，博士，zhaojian-666@163.com

中图分类号: O389
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- 被引次数: 0
出版历程
- 收稿日期: 2015-09-07
- 修回日期: 2015-11-25
- 刊出日期: 2017-05-25

SPH-based numerical simulation and experimental study on rock breaking by particle impact

1.
College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong, China
2.
Academy of Science and Technology, China University of Petroleum, Dongying 257061, Shandong, China
3.
CNOOC EnerTech-Safety and Environmental Protection Co., Tianjin 300450, China

摘要

摘要: 钻井液中加入体积分数为1%~3%的钢质粒子在钻头喷嘴处高速喷出冲击岩石，实现了粒子射流冲击和钻头机械联合破岩，有效提高了破岩效率。利用瞬态非线性动力学有限元模拟软件，基于光滑粒子流体动力学(smoothed particle hydrodynamics，SPH)方法，考虑流体对粒子射流冲击的影响，建立了粒子射流冲击破岩的物理模型，获得了粒子射流参数对破岩体积的影响规律，进行了室内实验验证，验证了SPH方法的有效性。结果表明：粒子射流冲击岩石表面形成规则的V型冲击坑；同条件下粒子射流破岩体积是水射流破岩体积的2~4倍；随着粒子射流冲蚀时间的增加，粒子射流破岩体积不断增加，但破岩效率降低；粒子射流压力大于10 MPa后，粒子射流破岩效率迅速增大；喷射角度大于6°后，破岩效率迅速减小。
- 粒子射流 /
- 冲击破岩 /
- SPH方法 /
- 室内实验
Abstract: Added into the drilling fluid in a volume portion of 1% to 3%, particles are capable of striking the rock with a high velocity after erupting from the bit nozzle and breaking the rock by particle impact combined with the mechanical action of the bit nozzle, thus greatly increasing the rock breaking efficiency. Using the transient nonlinear dynamics finite element simulation software and considering the influence of water jet, we established the physical model of rock breaking by particle impact based on the smoothed particle hydrodynamics (SPH) method, investigated the influence of the particle jet's parameters on the rock breaking volume, and verified the simulation results by comparing them with those of the indoors experiment which could verify the effectiveness of the SPH simulation method. Our results show that a regulation V-shaped crater is formed by the particle jet impact; the rock breaking volume resulting from this particle jet impact is 2 to 4 times that of the volume from the water jet under identical conditions. The rock breaking volume increases over time, but in the meantime the rock breaking efficiency decreases. When the pressure of the particle jet is above 10 MPa, there is a great increase of the rock breaking efficiency. When the jet angle is above 6°, there is a quick decrease of the rock breaking efficiency.
- particle jet /
- rock breaking by impact /
- SPH method /
- indoor experiment

HTML全文

图 1 粒子射流破岩计算模型

Figure 1. Calculation model for rock breaking caused by particle jet

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图 2 粒子射流破岩实验设备

Figure 2. Experimental equipment of rock breaking with particle jet

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图 3 粒子射流破岩实验流程

Figure 3. Flow diagram of rock breaking with particle jet

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图 4 实验粒子及冲击后岩样

Figure 4. Experimental particles and rock sample after impact

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图 5 岩石等效应力云图

Figure 5. Von Mises stress nephogram of the rock

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图 6 粒子射流形成的V型冲击坑

Figure 6. V-shaped crater caused by particle jet

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图 7 粒子射流破岩和水射流破岩

Figure 7. Rock breaking caused by particle jet and water jet

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图 8 粒子射流破岩体积随时间的变化

Figure 8. Rock breaking volume caused by particle jet as a function of time

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图 9 粒子射流破岩体积随压力的变化

Figure 9. Rock breaking volume caused by particle jet as a function of pressure

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图 10 粒子射流破岩体积随喷射角度的变化

Figure 10. Rock breaking volume caused by particle jet as a function of jet angle

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图 11 粒子射流喷射角

Figure 11. Particle jet angle

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