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

doi:10.11885/j.issn.1674-5086.2019.09.16.08

Abstract

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

CLC Number:

P634.3⁺2

WANG Guorong, WANG Teng, LI Rong, WANG Fei. Analysis of Pressure Characteristics in Working Cavity of Ultra High Pressure Reciprocating Pump for Shale Gas[J]. 西南石油大学学报(自然科学版), 2019, 41(6): 174-180.

0
/ / Recommend

Add to citation manager EndNote|Ris|BibTeX

URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2019.09.16.08

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2019/V41/I6/174

References

[1] WANG Teng, XIAO Xiaohua, ZHU Haiyan, et al. Experimental study on Longmaxi shale breaking mechanism with micro-PDC bit[J]. Rock Mechanics and Rock Engineering, 2017, 50(10):2795-2804. doi:10.1007/s00603-017-1255-6
[2] 曹海涛,詹国卫,余小群,等. 深层页岩气井产能的主要影响因素——以四川盆地南部永川区块为例[J]. 天然气工业, 2019, 39(增1):118-122. CAO Haitao, ZHAN Guowei, YU Xiaoqun, et al. Main factors affecting the production capacity of deep shale gas wells-Taking the Yongchuan block in the southern Sichuan Basin as an example[J]. Natural Gas Industry, 2019, 39(S1):118-122.
[3] 李宪文,肖元相,陈宝春,等. 苏里格气田致密砂岩气藏多层分压开采面临的难题及对策[J]. 天然气工业,2019,39(8):66-73. doi:10.3787/j.issn.1000-0976.-2019.08.008 LI Xianwen, XIAO Yuanxiang, CHEN Baochun, et al. Separate layer fracturing and multi-layer production of tight sandstone gas reservoirs in the Sulige Gas Field, Ordos Basin:Problems and countermeasures[J]. Natural Gas Industry, 2019, 39(8):66-73. doi:10.3787/j.issn.1000-0976.2019.08.008
[4] 唐颖,张金川,张琴,等. 页岩气井水力压裂技术及其应用分析[J]. 天然气工业, 2010, 30(10):33-38. doi:10.3787/j.issn.1000-0976.2010.10.008 TANG Ying, ZHANG Jinchuan, ZHANG Qin, et al. An analysis of hydraulic fracturing technology in shale gas wells and its application[J]. Natural Gas Industry, 2010, 30(10):33-38. doi:10.3787/j.issn.1000-0976.2010.10.008
[5] 曹学军,王明贵,康杰,等. 四川盆地威荣区块深层页岩气水平井压裂改造工艺[J]. 天然气工业, 2019, 39(7):81-87. doi:10.3787/j.issn.1000-0976.2019.07.010 CAO Xuejun, WANG Minggui, KANG Jie, et al. Fracturing technologies of deep shale gas horizontal wells in the Weirong Block, southern Sichuan Basin[J]. Natural Gas Industry, 2019, 39(7):81-87. doi:10.3787/j.issn.1000-0976.2019.07.010
[6] 焦方正. 页岩气"体积开发"理论认识、核心技术与实践[J]. 天然气工业, 2019, 39(5):1-14. doi:10.3787/j.issn.1000-0976.2019.05.001 JIAO Fangzheng. Theoretical insights, core technologies and practices concerning "volume development" of shale gas in China[J]. Natural Gas Industry, 2019, 39(5):1-14. doi:10.3787/j.issn.1000-0976.2019.05.001
[7] 张洪生,李鹏飞. 我国大功率压裂泵发展趋势及展望[J]. 机床与液压, 2018, 46(2):142-144. doi:10.3969/j.issn.1001-3881.2018.02.039 ZHANG Hongsheng, LI Pengfei. Domestic high-power fracturing pump development trends and prospects[J]. Machine Tool & Hydraulics, 2018, 46(2):142-144. doi:10.3969/j.issn.1001-3881.2018.02.039
[8] 李关访,张浩,于洋,等. 非常规压裂技术在川东页岩气开发中的应用[J]. 钻采工艺, 2014, 37(1):57-60. doi:10.3969/J.ISSN.1006-768X.2014.01.17 LI Guanfang, ZHANG Hao, YU Yang, et al. Application of unconventional fracturing technology in the shale gas development in eastern Sichuan[J]. Drilling & Production Technology, 2014, 37(1):57-60. doi:10.3969/J.ISSN.-1006-768X.2014.01.17
[9] 曾雨辰,杨保军. 页岩气水平井大型压裂设备配套及应用[J]. 石油钻采工艺, 2013, 35(6):78-82. ZENG Yuchen, YANG Baojun. Equipment outftting and application for large-scale fracturing in shale gas horizontal wells[J]. Oil Drilling & Production Technology, 2013, 35(6):78-82.
[10] 彭俊威,周青,戴启平,等. 国内大型压裂装备发展现状及分析[J]. 石油机械, 2016, 44(5):82-86. doi:10.16082/j.cnki.issn.1001-4578.2016.05.017 PENG Junwei, ZHOU Qing, DAI Qiping, et al. Development status and analysis of domestic large-scale fracturing equipment[J]. China Petroleum Machinery, 2016, 44(5):82-86. doi:10.16082/j.cnki.issn.1001-4578.2016.05.017
[11] 赵绪平,李志波,孙奉道,等. 压裂车的研究现状与发展方向[J]. 天然气与石油, 2015, 33(5):56-58. doi:10.3969/j.issn.1006-5539.2015.05.013 ZHAO Xuping, LI Zhibo, SUN Fengdao, et al. Research and development of fracturing truck[J]. Oil and Gas Field Development, 2015, 33(5):56-58. doi:10.3969/j.issn.-1006-5539.2015.05.013
[12] 宋志刚. 钻井泵液缸内压力规律研究与仿真[D]. 成都:西南石油大学, 2006. SONG Zhigang. Research and simulation of pressure law in drilling pump fluid cylinder[D]. Chengdu:Southwest Petroleum University, 2006.
[13] 董怀荣,王平,张慧峰,等. 恒流量往复泵压力变化规律实验研究[J]. 石油学报, 2004, 25(6):101-104, 108. doi:10.3321/j.issn:0253-2697.2004.06.021 DONG Huairong, WANG Ping, ZHANG Huifeng, et al. Experimental research on the pressure variation of the constant-rate reciprocating pump[J]. Acta Petrolei Sinica, 2004, 25(6):101-104, 108. doi:10.3321/j.issn:0253-2697.2004.06.021
[14] 赵志华,吴力. 往复泵故障智能诊断系统的设计[J]. 化工自动化及仪表, 2013, 40(6):701-705. doi:10.3969/j.issn.1000-3932.2013.06.004 ZHAO Zhihua, WU Li. Design of intelligent fault diagnostic system for reciprocating pumps[J]. Control and Instruments in Chemical Industry, 2013, 40(6):701-705. doi:10.3969/j.issn.1000-3932.2013.06.004
[15] CHO I S, JUNG J Y. A study on the pressure ripple characteristics in a bent-axis type oil hydraulic piston pump[J]. Journal of Mechanical Science & Technology, 2013, 27(12):3713-3719.
[16] HUANG Jiahai, YAN Zheng, QUAN Long, et al. Characteristics of delivery pressure in the axial piston pump with combination of variable displacement and variable speed[J]. Proceedings of the Institution of Mechanical Engineers, Part I:Journal of Systems and Control Engineering, 2015, 229(7):599-613. doi:10.1177/0959651815578967
[17] 张洋. 基于泵缸压力测试的往复泵性能监测和故障诊断方法研究[D]. 成都:西南石油大学, 2016. ZHANG Yang. Research on performance monitoring and fault diagnosis of reciprocating pump based on cylinder pressure testing[D]. Chengdu:Southwest Petroleum University, 2016.
[18] 王斐. 柱塞泵液力端工作性能参数实时监控系统设计与试验研究[D]. 成都:西南石油大学, 2016. WANG Fei. Design and experimental study of real-time monitoring system for working performance parameters of hydraulic end of plunger pump[D]. Chengdu:Southwest Petroleum University, 2016.
[19] 雷中清. 2000型车载压裂泵液力端工作机理研究[D]. 成都:西南石油大学, 2012. LEI Zhongqing. Study on working mechanism of hydraulic end of 2000 vehicle-mounted fracturing pump[D]. Chengdu:Southwest Petroleum University, 2012.
[20] 贾洪磊. 大功率三缸单作用往复式钻井泵计算与仿真分析研究[D]. 青岛:中国石油大学, 2007. JIA Honglei. The simulation of high-power reciprocal triplex single action drill pump[D]. Qingdao:China University of Petroleum, 2007.