Wellbore trajectory control tool seal system leakage analysis based on steady gap flow
Lubricant leakage will inevitably occur during the working process of wellbore trajectory control tools. Even including the lubricant compensation system, serious leakage will still cause lacks lubrication of the internal mechanical structure as well as electronic system damaged by external infiltra...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2020-06-01
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| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/1687814020930461 |
| _version_ | 1818247801084051456 |
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| author | Lei Shi Keqiang Wang Ding Feng Hong Zhang Peng Wang |
| author_facet | Lei Shi Keqiang Wang Ding Feng Hong Zhang Peng Wang |
| author_sort | Lei Shi |
| collection | DOAJ |
| description | Lubricant leakage will inevitably occur during the working process of wellbore trajectory control tools. Even including the lubricant compensation system, serious leakage will still cause lacks lubrication of the internal mechanical structure as well as electronic system damaged by external infiltration fluid, especially when it comes to battery sub and other electronic equipment. Seal system leakage prediction method was presented based on the assumption of steady gap flow. It is assumed that there is a constant gap between the lip seal and the rotating shaft, the gap height is determined by oil film thickness, and the length of the gap was determined by the contact analysis using the Mooney–Rivlin constitutive model. The analysis results show that the contact length between the primary seal lip and the rotary shaft is about 0.1 mm under the condition of ensuring the contact between the deputy seal lip and the rotary shaft. The overall lubricant leakage finite element analysis model was established, and the relationship between the internal lubricant pressure of the tool and the total leakage was obtained. The results of analysis indicate that under the internal pressure of 0.03 MPa, the lubricant leakage is approximately 6 mL/h, which was verified by experiments. |
| first_indexed | 2024-12-12T15:10:28Z |
| format | Article |
| id | doaj.art-a9bc7b2252e34e7e888bc78e4de6d012 |
| institution | Directory Open Access Journal |
| issn | 1687-8140 |
| language | English |
| last_indexed | 2024-12-12T15:10:28Z |
| publishDate | 2020-06-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Advances in Mechanical Engineering |
| spelling | doaj.art-a9bc7b2252e34e7e888bc78e4de6d0122022-12-22T00:20:37ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402020-06-011210.1177/1687814020930461Wellbore trajectory control tool seal system leakage analysis based on steady gap flowLei ShiKeqiang WangDing FengHong ZhangPeng WangLubricant leakage will inevitably occur during the working process of wellbore trajectory control tools. Even including the lubricant compensation system, serious leakage will still cause lacks lubrication of the internal mechanical structure as well as electronic system damaged by external infiltration fluid, especially when it comes to battery sub and other electronic equipment. Seal system leakage prediction method was presented based on the assumption of steady gap flow. It is assumed that there is a constant gap between the lip seal and the rotating shaft, the gap height is determined by oil film thickness, and the length of the gap was determined by the contact analysis using the Mooney–Rivlin constitutive model. The analysis results show that the contact length between the primary seal lip and the rotary shaft is about 0.1 mm under the condition of ensuring the contact between the deputy seal lip and the rotary shaft. The overall lubricant leakage finite element analysis model was established, and the relationship between the internal lubricant pressure of the tool and the total leakage was obtained. The results of analysis indicate that under the internal pressure of 0.03 MPa, the lubricant leakage is approximately 6 mL/h, which was verified by experiments.https://doi.org/10.1177/1687814020930461 |
| spellingShingle | Lei Shi Keqiang Wang Ding Feng Hong Zhang Peng Wang Wellbore trajectory control tool seal system leakage analysis based on steady gap flow Advances in Mechanical Engineering |
| title | Wellbore trajectory control tool seal system leakage analysis based on steady gap flow |
| title_full | Wellbore trajectory control tool seal system leakage analysis based on steady gap flow |
| title_fullStr | Wellbore trajectory control tool seal system leakage analysis based on steady gap flow |
| title_full_unstemmed | Wellbore trajectory control tool seal system leakage analysis based on steady gap flow |
| title_short | Wellbore trajectory control tool seal system leakage analysis based on steady gap flow |
| title_sort | wellbore trajectory control tool seal system leakage analysis based on steady gap flow |
| url | https://doi.org/10.1177/1687814020930461 |
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