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| 煤系地层水平井低流速液流有杆泵泵阀运动特性 |
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刘新福1,2,刘春花3,刘国强4,何鸿铭1,綦耀光3
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(1.青岛理工大学机械与汽车工程学院,山东青岛 266520;2.工业流体节能与污染控制教育部重点实验室, 山东青岛 266520;3.中国石油大学(华东)机电工程学院,山东青岛 266580;4.中国石油煤层气有限责任公司临汾分公司,山西太原 041000)
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| 摘要: |
| 综合低沉没度和大斜度等因素耦合作用的影响,推导泵阀阀球伴随弹簧运动和造斜段泵腔液流连续流动的微分方程,建立水平井造斜段泵阀随液流运动的数学模型,依据数值求解结果揭示低流速液流中泵阀伴随弹簧的运动特性。结果表明:低沉没度和大斜度等因素耦合作用下,增大冲程和冲次会提高泵阀阀球伴随弹簧运动的升程、速度和加速度,且增大冲程更有利于提高低流速液流入泵流速并使液流顺利进泵,下冲程中弹簧力与阀球重力的双重作用使得固定阀球伴随弹簧快速复位,这有利于顺利开启游动阀球和提高泵效;低流速液流中水平井泵阀开启瞬间的阀球加速度会出现短暂的周期性波动并在短时间内迅速变小,易引起阀球“抖动”现象并降低泵效,且增大冲程和冲次将缩短阀球加速度趋向平缓的时间。 |
| 关键词: 低流速液流 造斜段泵阀 水平井有杆泵 运动特性 |
| DOI：10.3969/j.issn.1673-5005.2020.03.016 |
| 分类号::TP 028.8 |
| 文献标识码:A |
| 基金项目:国家科技重大专项(2016ZX05065-001);山东省重点研发计划项目(2019GHY112029,2019GSF109090);国家自然科学基金项目(51705272) |
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| Kinetic performance on pump valve of sucker rod with low water rate in CBM horizontal wellbores |
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LIU Xinfu1,2, LIU Chunhua3, LIU Guoqiang4, HE Hongming1, QI Yaoguang3
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(1.School of Mechanical and Automotive Engineering in Qingdao University of Technology, Qingdao 266520, China;2.Key Laboratory of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao 266520, China;3.College of Mechanical and Electronic Engineering in China University of Petroleum(East China), Qingdao 266580, China;4.PetroChina Coalbed Methane Company Limited, Linfen Branch, Taiyuan 041000, China)
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| Abstract: |
| The differential equations of a pump valve moving with the spring and continuous flow of water were derived under coupling conditions of low submergence and high inclination. Then the mathematical model of a pump valve moving with liquid was developed. The kinetic performance on the pump valve with a low water rate was analyzed based on the numerical simulation. The results show that the increases of stroke length and pumping speed lead to the increase of displacement, velocity and acceleration for the pump valve with a high inclination. The increased stroke length is beneficial to enhancing the water flow rate. The loadings of the spring force and ball gravity on the fixed valve make the pump valve reset quickly on the downstroke. It is beneficial to opening the travelling valve and improving efficiency of pumps in the CBM horizontal wells. The acceleration of pump valve is in the state of short-term cyclical fluctuation and decreases rapidly. It will make the pump valve jitter and cause the efficiency drop of the pump. Time taken to run smoothly for the pump valve can be reduced with the increased stroke length and pumping speed in the CBM horizontal wellbores. |
| Key words: low water rate pump valve in inclined section pump in horizontal wellbore kinetic performance |
