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Suppression anti-vibration of ultra-small diameter neutron generators for logging while drilling via potting materials.

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Title: Suppression anti-vibration of ultra-small diameter neutron generators for logging while drilling via potting materials.
Authors: Zhuo, Wei1,2 (AUTHOR), Yu, Jie1,2 (AUTHOR), Li, Gang1 (AUTHOR) gang.li@inest.cas.cn, Zeng, Meihua1 (AUTHOR), Wang, Liang1 (AUTHOR)
Source: Petroleum Science & Technology. 2025, Vol. 43 Issue 23, p3419-3441. 23p.
Subjects: Neutron generators, Vibration isolation, Adhesives, Geophysical well logging, Durability, Viscoelastic materials, Finite element method
Abstract: To enhance the reliability of the logging-while-drilling (LWD) neutron generator in harsh environments, this paper proposes a novel polymer monolithic potting protection scheme that can effectively decrease response of the structure under vibrational excitation by selecting suitable polymer potting material and installation method. This paper systematically evaluates the influence of viscoelastic parameters of the polymer potting material on vibration energy dissipation through theoretical calculations. Additionally, it thoroughly investigates the influence of the coupling between the potting modulus and the installation method on the reliability of the structure through finite element analysis. The results demonstrate that potting material with a shorter high-frequency relaxation time can more effectively absorb vibration energy. As the potting modulus increases, the maximum stress of the neutron tube decreases by 96.4%, 93.7%, and 84.7% under short-span, medium-span, and long-span installation methods, respectively. The maximum strain also decreases by 96.6%, 93.9%, and 86.5% respectively. By using the short-span support and high modulus potting material, the local stress and strain can be minimized. A prototype vibration test verifies the effectiveness of this method in improving the reliability of the neutron generator. This analysis provides a reference and reliability prediction for the design of future LWD neutron generators. [ABSTRACT FROM AUTHOR]
Copyright of Petroleum Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 188232746
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Suppression anti-vibration of ultra-small diameter neutron generators for logging while drilling via potting materials.
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  Data: <searchLink fieldCode="AR" term="%22Zhuo%2C+Wei%22">Zhuo, Wei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Jie%22">Yu, Jie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Gang%22">Li, Gang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gang.li@inest.cas.cn</i><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Meihua%22">Zeng, Meihua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Liang%22">Wang, Liang</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Petroleum+Science+%26+Technology%22">Petroleum Science & Technology</searchLink>. 2025, Vol. 43 Issue 23, p3419-3441. 23p.
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  Data: <searchLink fieldCode="DE" term="%22Neutron+generators%22">Neutron generators</searchLink><br /><searchLink fieldCode="DE" term="%22Vibration+isolation%22">Vibration isolation</searchLink><br /><searchLink fieldCode="DE" term="%22Adhesives%22">Adhesives</searchLink><br /><searchLink fieldCode="DE" term="%22Geophysical+well+logging%22">Geophysical well logging</searchLink><br /><searchLink fieldCode="DE" term="%22Durability%22">Durability</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelastic+materials%22">Viscoelastic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To enhance the reliability of the logging-while-drilling (LWD) neutron generator in harsh environments, this paper proposes a novel polymer monolithic potting protection scheme that can effectively decrease response of the structure under vibrational excitation by selecting suitable polymer potting material and installation method. This paper systematically evaluates the influence of viscoelastic parameters of the polymer potting material on vibration energy dissipation through theoretical calculations. Additionally, it thoroughly investigates the influence of the coupling between the potting modulus and the installation method on the reliability of the structure through finite element analysis. The results demonstrate that potting material with a shorter high-frequency relaxation time can more effectively absorb vibration energy. As the potting modulus increases, the maximum stress of the neutron tube decreases by 96.4%, 93.7%, and 84.7% under short-span, medium-span, and long-span installation methods, respectively. The maximum strain also decreases by 96.6%, 93.9%, and 86.5% respectively. By using the short-span support and high modulus potting material, the local stress and strain can be minimized. A prototype vibration test verifies the effectiveness of this method in improving the reliability of the neutron generator. This analysis provides a reference and reliability prediction for the design of future LWD neutron generators. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Petroleum Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/10916466.2024.2418890
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      – Code: eng
        Text: English
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        PageCount: 23
        StartPage: 3419
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      – SubjectFull: Neutron generators
        Type: general
      – SubjectFull: Vibration isolation
        Type: general
      – SubjectFull: Adhesives
        Type: general
      – SubjectFull: Geophysical well logging
        Type: general
      – SubjectFull: Durability
        Type: general
      – SubjectFull: Viscoelastic materials
        Type: general
      – SubjectFull: Finite element method
        Type: general
    Titles:
      – TitleFull: Suppression anti-vibration of ultra-small diameter neutron generators for logging while drilling via potting materials.
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            NameFull: Zhuo, Wei
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            NameFull: Yu, Jie
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            NameFull: Li, Gang
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            NameFull: Zeng, Meihua
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            NameFull: Wang, Liang
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            – D: 01
              M: 12
              Text: 2025
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