Structural Engineering and Mechanics

  • 제84권3호
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  • Pages.337-344
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  • 2022
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Influence of oil pipe corrosion defects on the sealing performance of annular BOP

  • Dong, Liangliang (School of Mechatronic Engineering, Southwest Petroleum University) ;
  • Tang, Yuan (Well Control Emergency Rescue Response Center, CNPC Chuanqing Drilling Engineering Co. Ltd.) ;
  • Wang, Liuyang (Well Control Emergency Rescue Response Center, CNPC Chuanqing Drilling Engineering Co. Ltd.)
  • 투고 : 2022.01.10
  • 심사 : 2022.09.20
  • 발행 : 2022.11.10
⟨ 이전 논문 다음 논문 ⟩

초록

Due to corrosion defects on the surface of the oil pipe, the sealing performance of the annular blowout preventer (BOP) decreases, and the leakage of toxic and harmful gases such as H2S and SO2 will threaten the safety of operators on the well. Therefore, this paper establishes the FE model for evaluating the sealing performance of BOP-oil pipe corrosion defects, which is based on the rubber large deformation theory and rubber core sealing mechanism, and designs the experiment of BOP sealing performance to verify the accuracy of the FE model. The sealing performance of BOP sealing oil pipe with corrosion defects is studied. The research results show that the sealing performance of BOP is more sensitive to the axial size of corrosion defects. With the increase of oil pipe outer diameter, the critical size of defects increases continuously. The sensitivity of radial and depth dimensions is low, When for 88.9 mm outer diameter oil pipe, the axial critical size of corrosion defect is 20 mm, the radial critical size is 16 mm and the critical depth is 2 mm. Fit the formula between the outer diameter of oil pipe and the piston increment. According to the formula, the operator can calculate the piston stroke increment required by the BOP to complete the sealing when the oil pipe is corroded.

키워드

과제정보

This research was supported by National Natural Science Foundation (52204050), Sichuan science and technology program (2021ZHCG0013, 22ZDYF3009).

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