西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (6): 174-180.DOI: 10.11885/j.issn.1674-5086.2019.09.16.08

• 页岩气开发专刊 • 上一篇    下一篇

页岩气超高压往复泵工作腔压力测试与分析

王国荣1,2,3, 王腾2,3, 李蓉4, 王斐5   

  1. 1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川 成都 610500;
    2. 西南石油大学能源装备研究院, 四川 成都 610500;
    3. 西南石油大学机电工程学院, 四川 成都 610500;
    4. 中国石化四机石油机械有限公司, 湖北 荆州 434000;
    5. 中国石油新疆技师学院, 新疆 克拉玛依 834000
  • 收稿日期:2019-09-16 出版日期:2019-12-10 发布日期:2019-12-10
  • 通讯作者: 王国荣,E-mail:swpi2002@163.com
  • 作者简介:王国荣,1977年生,男,汉族,湖北仙桃人,教授,博士,主要从事油气装备仿生织构摩擦学与井下工具方面的研究工作。E-mail:swpi2002@163.com;王腾,1990年生,男,汉族,陕西渭南人,博士研究生,主要从事压裂设备工作机理及表面织构抗磨减阻方面的研究。E-mail:witt_wang@126.com;李蓉,1970年生,女,汉族,湖北京山人,高级工程师,主要从事泵产品研究开发工作。E-mail:1989717621@qq.com;王斐,1980年生,女,汉族,四川宜宾人,讲师,硕士,主要从事油田企业职工培训管理方面的工作。E-mail:106992979@qq.com
  • 基金资助:
    国家自然科学基金青年科学基金(51505397);四川省科技计划重点研发项目(2018JZ0079)

Analysis of Pressure Characteristics in Working Cavity of Ultra High Pressure Reciprocating Pump for Shale Gas

WANG Guorong1,2,3, WANG Teng2,3, LI Rong4, WANG Fei5   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Energy Equipment Institute of Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    4. No.4 Machinery Plant, Petroleum Machinery Co. Ltd., SINOPEC, Jingzhou, Hubei 434000, China;
    5. Xinjiang Training Center(Xinjiang Technician College), CNPC, Karamay, Xinjiang 834000, China
  • Received:2019-09-16 Online:2019-12-10 Published:2019-12-10

摘要: 以用于页岩气水平井压裂的超高压往复泵为研究对象,为探索提高泵工作性能及可靠性的解决思路,开展了泵工作腔内压力变化规律及基本特征的分析研究。根据力学基础理论,定性地分析了泵阀开启、关闭时刻点的工作腔内压力变化。搭建了全尺寸超高压往复泵工作腔压力测试台架,获得了4种柱塞冲次和5种排出管汇压力下的泵腔压力变化曲线。实验结果表明,排液冲程中柱塞冲次和排出管汇压力对工作腔压力降低的滞后时间具有显著影响,工作腔压力在临近峰值的高压区间内会产生“M”型压力冲击特征,对此特征的分析将为进一步分析阀箱内壁疲劳失效原因、优化泵阀运动机理提供解决思路及实验依据。

关键词: 往复泵, 液力端, 泵腔, 工作压力, 压力冲击

Abstract: In order to explore the solution to improve the working performance and reliability of the pump, we took the ultrahigh pressure reciprocating pump for shale gas horizontal well fracturing as the research object, and analyzed and studied the pressure variation law and basic characteristics of the pump working chamber. According to the basic theory of mechanics, the pressure changes in the working chamber at the opening and closing time of the pump valve were qualitatively analyzed. A fullscale pressure test bench for working chamber of ultra-high pressure reciprocating pump was built, and pressure curves of pump chamber under four plunger strokes and five discharge manifold pressures were obtained. It was found that the plunger stroke and the discharge manifold pressure during the drain stroke have a significant effect on the lag time of the working chamber pressure reduction. At the same time, the pressure in the working chamber generated an "M" type pressure shock characteristic in the high pressure range near the peak pressure, which could provide a solution and experimental basis for further analysis of the causes of fatigue failure of the inner wall of the valve box and optimization of the motion mechanism of the pump valve.

Key words: reciprocating pump, hydraulic end, pump chamber, pressure curve, pressure shock

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