Fluid-solid coupling simulation and tests of combined spiral seal for high-speed cone bit

doi:10.7623/syxb202204009

Acta Petrolei Sinica ›› 2022, Vol. 43 ›› Issue (4): 558-570.DOI: 10.7623/syxb202204009

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Fluid-solid coupling simulation and tests of combined spiral seal for high-speed cone bit

Zhou Yi, Tang Yifeng, Jiang Yang, Hu Jiahao, Huang Yuxing

School of Mechatronic Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China

Received:2021-02-05 Revised:2021-12-09 Published:2022-04-30
Contact: 周已,女,1980年2月生,2009年获西南石油大学硕士学位,现为西南石油大学副教授,主要从事机械密封研究工作。

高速牙轮钻头螺旋组合密封流固耦合仿真及试验

周已, 唐艺凤, 蒋阳, 胡家豪, 黄毓兴

西南石油大学机电工程学院四川成都 610500

通讯作者: 周已,女,1980年2月生,2009年获西南石油大学硕士学位,现为西南石油大学副教授,主要从事机械密封研究工作。
作者简介:周已,女,1980年2月生,2009年获西南石油大学硕士学位,现为西南石油大学副教授,主要从事机械密封研究工作。Email:673871313@qq.com
基金资助:
国家自然科学基金青年科学基金项目（No.51604238）资助。

Abstract

Abstract: Seal is the key to determine the service life of cone bit. However, the passive seal is seriously worn, thus limiting the improvement of speed and service life of the cone bit. The basic principle of combined spiral seal structure with active sand discharge function is analyzed, and combined with the basic theory of fluid-solid coupling, the corresponding control equations are established. The performance of combined spiral seal is studied by the combination of finite element simulation and experiment. During finite element simulation, the simulation model is established, and the fluid-solid coupling simulation of the combined spiral seal is performed using the ANSYS simulation software. The sand discharge function of the single spiral seal is analyzed using the flow field pressure of spiral seal, and the sealing ability of the combined spiral seal is analyzed using the contact pressure of its O-ring. Moreover, the sand discharge performance verification test is designed for non-pressurized single spiral seal ring, so as to verify the sand discharge capacity of single spiral seal; the sealing performance verification test is designed for pressurized combined spiral seal; the practical application of spiral combined seal is studied by simulating the real drilling conditions on an indoor bench. The simulation and test results show that single spiral seal ring is applicable for sand discharge, and the combined spiral seal has good sealing ability.

Key words: high speed cone bit, combined spiral seal, fluid-solid coupling, active sand discharge, test

摘要： 密封是决定牙轮钻头寿命的关键，由于被动密封磨损严重，限制了牙轮钻头转速及寿命的提高。通过分析具有主动排砂功能的螺旋组合密封结构的基本原理，并结合流固耦合基础理论，建立了相应的控制方程。通过有限元仿真和试验相结合的方法研究了螺旋组合密封的性能。在有限元仿真部分，建立了仿真模型，利用ANSYS仿真软件对螺旋组合密封进行了流固耦合仿真研究，通过螺旋密封的流场压力分析单螺旋密封的排砂作用，通过螺旋组合密封中O型圈的接触压力分析螺旋组合密封的密封能力。设计了未加压单螺旋密封圈排砂性能验证试验来验证单螺旋密封的排砂能力，设计了加压螺旋组合密封性能验证试验来研究螺旋组合密封性能，通过室内台架模拟真实钻井工况研究螺旋组合密封的实际应用情况。仿真结果与试验结果均表明，单螺旋密封圈的排砂作用可行，螺旋组合密封具有良好的密封能力。

关键词: 高速牙轮钻头, 螺旋组合密封, 流固耦合, 主动排砂, 试验

CLC Number:

TE921

Zhou Yi, Tang Yifeng, Jiang Yang, Hu Jiahao, Huang Yuxing. Fluid-solid coupling simulation and tests of combined spiral seal for high-speed cone bit[J]. Acta Petrolei Sinica, 2022, 43(4): 558-570.

周已, 唐艺凤, 蒋阳, 胡家豪, 黄毓兴. 高速牙轮钻头螺旋组合密封流固耦合仿真及试验[J]. 石油学报, 2022, 43(4): 558-570.

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Fluid-solid coupling simulation and tests of combined spiral seal for high-speed cone bit

高速牙轮钻头螺旋组合密封流固耦合仿真及试验

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