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工程设计学报
Chinese Journal of Engineering Design  2024, Vol. 31 Issue (3): 383-392    DOI: 10.3785/j.issn.1006-754X.2024.23.175
Mechanical parts and equipment design     
Research on sealing test technology of cone bit and evaluation of seal ring performance
Yuchun KUANG1(),Peng HE1,Jingbin HE2,Qi WEI3,Shuwen ZHOU4,Zongzheng DONG1
1.School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu 610500, China
2.Changqing Drilling Corporation, Chuanqing Drilling Engineering Co. , Ltd. , Xi'an 710018, China
3.Chengdu Jirui Times Touch Technology Co. , Ltd. , Chengdu 610041, China
4.Chongqing Natural Gas Pipeline Co. , Ltd. , National Petroleum and Natural Gas Pipeline Network Group Co. , Ltd. , Chongqing 408000, China
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Abstract  

Cone bit in deep drilling is subject to multiple factors such as high temperature, high pressure, friction and corrosion during deep well drilling, which directly affect the service life of the seal ring, and then affect the life of the bit. Therefore, the sealing test technology of cone bit was studied. Firstly, the sealing test machine of cone bit was designed, and its functional modules were designed; secondly, the sealing performances of O-shaped rubber seal ring and radially symmetrical flat rubber seal ring under the influence of multiple factors were analyzed by finite element method, and the contact stress judge criterion and von Mises criterion were used to evaluate and compare the seal ring performances; finally, the life test of the seal ring under the action of multiple factors was carried out, and the experimental results were compared with the simulation results. The experimental results verified the feasibility and reliability of the test machine for cone bit sealing test. The designed sealing test machine of cone bit can predict the service life of cone bit seal ring, and has a broad application prospect in engineering.

Key words： cone bit      sealing test technique      seal ring      performance evaluation      life test     
Received: 07 June 2023      Published: 27 June 2024
CLC:  TE 921.1  
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Yuchun KUANG
Peng HE
Jingbin HE
Qi WEI
Shuwen ZHOU
Zongzheng DONG
Cite this article:

Yuchun KUANG,Peng HE,Jingbin HE,Qi WEI,Shuwen ZHOU,Zongzheng DONG. Research on sealing test technology of cone bit and evaluation of seal ring performance. Chinese Journal of Engineering Design, 2024, 31(3): 383-392.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2024.23.175     OR     https://www.zjujournals.com/gcsjxb/Y2024/V31/I3/383


牙轮钻头密封试验技术研究及密封圈性能评价

牙轮钻头在深井钻进时会受到高温、高压、摩擦以及腐蚀等多个因素的共同作用，直接影响密封圈的使用寿命，进而影响钻头寿命。为此，进行了牙轮钻头密封试验技术研究。首先，设计了牙轮钻头密封试验机，设计了试验机各功能模块；其次，对O形橡胶密封圈和径向对称扁平橡胶密封圈在多因素影响下的密封性能进行了有限元分析，同时结合接触应力评判准则和von Mises准则对密封圈性能进行了评价和对比；最后，进行了密封圈在多因素作用下的寿命测试实验，并将实验结果与仿真结果进行了对比。实验结果验证了试验机进行牙轮钻头密封试验的可行性及可靠性。所设计的牙轮钻头密封试验机能预测牙轮钻头密封圈的使用寿命，具有广阔的工程应用前景。


关键词： 牙轮钻头,  密封试验技术,  密封圈,  性能评价,  寿命测试 
Fig.1 Structure of sealing test machine for cone bit
Fig.2 Section view of cone bit
试验序号压差
10.068 5
20.1289
30.468 8
40.405 6
50.574 1
60.298 5
70.344 4
Table 1 Absolute mean value of pressure difference of cone bit seal ring
Fig.3 Three-dimensional structure diagram of dynamic specimen
Fig.4 Three-dimensional structure diagram of static specimen
Fig.5 Diagram of assembly of dynamic specimen and static specimen
Fig.6 Three-dimensional structure diagram of rotating shaft
Fig.7 Three-dimensional structure diagram of left sleeve and test machine base
Fig.8 Three-dimensional structure diagram of right sleeve
Fig.9 Three-dimensional structure diagram of left end cover
Fig.10 Three-dimensional structure diagram of right end cover
Fig.11 Nephogram of equivalent stress of seal ring
Fig.12 Comparison of equivalent stress of two sealing rings
Fig.13 Nephogram of contact stress of seal ring
Fig.14 Comparison of contact stress of two sealing rings
Fig.15 Variation curve of seal ring stress with pressure difference
Fig.16 Variation curve of seal ring stress with temperature
Fig.17 Variation curve of seal ring stress with rotating speed
Fig.18 Life test flow of seal ring of cone bit
样品类型样品编号转速/ (r/min)温度/℃压差/MPa工作寿命/h
O形橡胶密封圈O1-12601600.930
O1-229
径向对称扁平橡胶密封圈B1-157
B1-2175158
B1-358
Table 2 Parameters and test results of life test experiment 1 of cone bit seal ring
样品类型样品编号转速/(r/min)温度/℃压差/MPa工作寿命/h
O形橡胶密封圈O2-14501500.828
O2-226
径向对称扁平橡胶密封圈B2-11600.870
B2-268
Table 3 Parameters and test results of life test experiment 2 of cone bit seal ring
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