Study on Rubber Bushing Failure of PDM having Uniform Wall Thickness

doi:10.11885/j.issn.1674-5086.2016.08.09.02

Abstract

Abstract: With the gradual promotion and application of positive displacement motors (PDM) having uniform wall thickness, the rubber bushing failure has become increasingly prominent. Following the failure of the rubber bushing, the PDM exhibits decreasing output performance and lifespan, which may impact the drilling speed and efficiency substantially. A numerical model consisting of a stator and rotor is established based on thermodynamic principles and the principal strain fatigue algorithm. The impact of well depth, magnitude of interference, and roughness on the thermo-mechanical behavior of a rubber bushing is studied, and the lifespan of the rubber bushing is predicted using Fe-safe fatigue analysis software. According to the research results, the main failure form of uniform-wall-thickness rubber bushings is fatigue failure. Comparison of rubber bushings having conventional and uniform wall thicknesses shows that the uniform wall thickness bushing has better sealing performance and lower sensitivity to static liquid head. While designing a rubber bushing of uniform wall thickness, attention should be paid to the magnitude of interference on the abrasion of the rubber bushing to guarantee the safe and efficient operation of a PDM.

Key words: conventional wall thickness, uniform wall thickness, abrasion, fatigue failure, liquid head

CLC Number:

TE924

TONG Hua, CHEN Guoyin, ZHU Xiaohua. Study on Rubber Bushing Failure of PDM having Uniform Wall Thickness[J]. 西南石油大学学报(自然科学版), 2017, 39(6): 154-161.

0
/ / Recommend

Add to citation manager EndNote|Ris|BibTeX

URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2016.08.09.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2017/V39/I6/154

References

[1] 张劲,张士诚,师国臣. 常规螺杆泵定子有限元分析[J]. 力学季刊,2003,24(4):590-598. doi:10.15959/j.cnki.0254-0053.2003.04.025 ZHANG Jin, ZHANG Shicheng, SHI Guochen. FEM analysis for a general screw pump stator[J]. Chinese Quarterly of Mechanics, 2003, 24(4):590-598. doi:10.15959/j.cnki.0254-0053.2003.04.025
[2] 张劲,张士诚. 常规螺杆泵定子有限元求解策略[J]. 机械工程学报,2004,40(5):189-193. doi:10.3321/j.issn:0577-6686.2004.05.038 ZHANG Jin, ZHANG Shicheng. FEM analysis policy for general screw-pump's stator[J]. Chinese Journal Ring, 2004, 40(5):189-193. doi:10.3321/j.issn:05776686.2004.05.038
[3] 叶卫东,郭玉双,杜秀华,等. 等壁厚螺杆泵密封性能有限元分析[J]. 润滑与密封,2009,34(7):41-43. doi:10.3969/j.issn.0254-0150.2009.07.010 YE Weidong, GUO Yushuang, DU Xiuhua, et al. The finite element analysis on the seal performance of the iso-wall thickness progressive cavity pump[J]. Lubrication Engineering, 2009, 34(7):41-43. doi:10.3969/j.issn.02540150.2009.07.010
[4] 韩传军,邱亚玲,刘清友,等. 螺杆钻具等壁厚衬套性能分析[J]. 西南石油大学学报(自然科学版),2008,30(4):163-165. doi:10.3863/j.issn.10002634.2008.04.042 HAN Chuanjun, QIU Yaling, LIU Qingyou, et al. Performance analysis for uniform wall thickness bushing of PDM[J]. Journal of Southwest Petroleum University (Science and Technology Edition), 2008, 30(4):163-165. doi:10.3863/j.issn.1000-2634.2008.04.042
[5] 李增亮,姜明云,禹超,等. 准等壁厚螺杆钻具马达断面型线设计[J]. 石油矿场机械,2014,43(5):45-48. doi:10.3969/j.issn.1001-3482.2014.05.013 LI Zengliang, JIANG Mingyun, YU Chao, et al. Section line designing of screw drill motor with quasi thickness rubber bush[J]. Oil Field Equipment, 2014, 43(5):45-48. doi:10.3969/j.issn.1001-3482.2014.05.013
[6] 祝效华,石昌帅,童华. 等壁厚螺杆钻具定子衬套变形规律研究[J]. 石油机械,2011,39(12):5-8. doi:10.16082/j.cnki.issn.1001-4578.2011.12.001 ZHU Xiaohua, SHI Changshuai, TONG Hua. Research on the deformation law of the stator lining in screw drill with equal wall thickness[J]. China Petroleum Machinery, 2011, 39(12):5-8. doi:10.16082/j.cnki.issn.10014578.2011.12.001
[7] 韩传军,张杰,刘洋. 常规螺杆钻具定子衬套的热力耦合分析[J]. 中南大学学报(自然科学版),2013,44(6):2311-2317. HAN Chuanjun, ZHANG Jie, LIU Yang. Thermalstructure coupling analysis for general stator lining of PDM[J]. Journal of Central South University (Science and Technology), 2013, 44(6):2311-2317.
[8] 曹刚,刘合,金红杰,等. 螺杆泵动力学热力耦合分析方法研究[J]. 计算力学学报,2010,27(5):930-935. doi:10.7511/jslx20105031 CAO Gang, LIU He, JIN Hongjie, et al. Thermal-structure coupling analysis of PCP dynamics[J]. Chinese Journal of Computational Mechanics, 2010, 27(5):930-935. doi:10.7511/jslx20105031
[9] ANDREW H, JENNY C, SMITHERS R. Fatigue of rubber and plastic materials[J]. Rubber World, 2015, 251(4):22-27.
[10] 刘建勋,黄友剑,刘柏兵,等. 一种橡胶弹性元件疲劳寿命预测方法的研究[J]. 电力机车与城轨车辆,2011,34(3):12-14. doi:doi:10.3969/j.issn.16721187.2011.03.004 LIU Jianxun, HUANG Youjian, LIU Bobing, et al. Research on fatigue life prediction method of rubber components[J]. Electric Locomotives & Mass Transit Vehicles, 2011, 34(3):12-14. doi:10.3969/j.issn.16721187.2011.03.004
[11] WILLIAM Vernon Mars. Multiaxial fatigue of rubber[D]. Toledo:The University of Toledo, 2001.
[12] 邢涛,钟萍,橡胶散热系数测量方法的研究[J]. 橡胶工业,2001,48(5):266-269. doi:10.3969/j.issn.1000890X.2001.05.002 XING Tao, ZHONG Ping. The measuring methods'research of coefficient of heat transfer for rubber[J]. Rubber Industry, 2001, 48(5):266-269. doi:10.3969/j.issn.1000890X.2001.05.002
[13] 魏纪德,郑学成,岳莉. 采油螺杆泵定子温度场数值模拟分析[J]. 石油机械,2006,34(2):11-14. doi:10.3969/j.issn.1001-4578.2006.02.004 WEI Jide, ZHENG Xuecheng, YUE Li. Numerical simulation for temperature field of a progressive cavity pump(PCP) stator[J]. China Petroleum Machinery, 2006, 34(2):11-14. doi:10.3969/j.issn.1001-4578.2006.02.004
[14] JIE Zhang, ZHENG Liang, CHUANJUN Han. Failure analysis and finite element simulation of key components of PDM[J]. Engineering Failure Analysis, 45(2014):15-25. doi:10. 1016/j. engfailanal. 2014. 06. 014.
[15] 石昌帅,螺杆钻具金属定子衬套线型设计及液压成型方法研究[D]. 成都:西南石油大学,2014. SHI Changshuai. Metal Stator Lining LineType design of positive displacement motor and tube hydroforming method research[D]. Chengdu:Southwest Petroleum University, 2014.