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Published on: May 1, 2018
Annulus flooding detection system in flexible pipes using gamma rays transmission technique.
C A Marinho1, E F O de Jesus2, A H M F T Silva3
1Nuclear Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Petrobras Research Center (CENPES), Rio de Janeiro, Brazil.
A new gamma ray transmission inspection system detects seawater ingress in flexible pipes, preventing CO2 Stress Corrosion Cracking (SCC-CO2) and extending operational life in the oil and gas industry.
Area of Science:
- Materials Science and Engineering
- Subsea Engineering
- Non-Destructive Testing
Background:
- Flexible pipes are critical in the oil and gas industry, particularly for Brazilian Pre-Salt production.
- Seawater ingress into flexible pipes can cause CO2 Stress Corrosion Cracking (SCC-CO2), significantly reducing service life.
- Effective inspection systems are crucial for detecting annulus flooding before pipe failure.
Purpose of the Study:
- To present a novel inspection system for detecting annulus flooding in flexible pipes.
- To address the limitations of existing inspection methods for subsea applications.
Main Methods:
- Development of an inspection system utilizing gamma ray transmission.
- Statistical evaluation of the system's reliability through numerous trials.
Main Results:
- The gamma ray transmission system effectively detects annulus flooding conditions.
- Statistical analysis demonstrates the robustness and reliability of the proposed inspection solution.
Conclusions:
- The developed gamma ray transmission system offers a viable solution for monitoring flexible pipe integrity.
- This technology can enhance safety and operational efficiency in subsea oil and gas production by preventing failures due to SCC-CO2.
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