PROJECTS

To develop a cementitious cork composite with the aim of improving thermal and mechanical performance in pipelines for oil exploration.

SCOPE

Most oil companies have shown interest in extracting oil and gas from deep and ultra-deep waters. Explorations off the coast of Brazil are being recognized at an international level, due to both the continuous discovery of new oil fields and the technological experience accumulated throughout the country. Besides the known problems related with drilling in the pre-salt fields, at more than 300 km from the shore and at depths over 2.5 km, there are new challenges related with the transport of oil and gas to shore. In such environments, the pipelines are required to have adequate thermal insulation. However, this must not compromise the oil flow, or complicate the operation and installation procedures.

MAIN OBJETIVES

To develop and optimize a new flexible cementitious composite integrating cork granulates that ensures good structural and thermal behaviour of sandwich pipelines for the transportation of oil and gas from deep waters.

PROJECT ACTIVITIES

The project will investigate all aspects involved, from material selection and composite development, to the structural and thermodynamic behaviour of pipelines. The thermomechanical properties of the pipeline and the composite, as well as the durability of the composite, will be studied experimentally. Additionally, numerical simulations of the structural behaviour and the heat transfer through and along the pipeline will be performed. The expected result from the project is the optimization of a new flexible cementitious composite integrating cork granulates that ensures good structural and thermal behaviour of sandwich pipelines for the transportation of oil and gas from deep waters.

LIST OF COMMUNICATIONS

• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2021), “Uncertainty in collapse strength prediction of sandwich pipelines”, Proceedings of the 40th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2021), Virtual, Online.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2021), “Burst failure and reliability assessment of X-100 to X-120 ultra-high strength pipes”, Proceedings of the 40th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2021), Virtual, Online.
• Skerget, L.; Tadeu, A.; António, J. (2020), “Numerical simulation of heat transport in multilayered composite pipe”, BEM/MRM 42 – 42nd International Conference on Boundary Elements and other Mesh Reduction Methods.

LIST OF PUBLICATIONS

• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2023), “Uncertainty in estimation of partial safety factors for different steel-grade corroded pipelines”, Journal of Marine Science and Engineering, Vol. 11, 177.
• Wang, ZK. and Guedes Soares, C. (2022) “Theoretical investigation on the upheaval thermal buckling of a lined subsea pipeline”, Ocean Engineering, Vol. 261, 111843.
• Wang, ZK. and Guedes Soares, C. (2022) “A new buckle initiation concept based on the energy barrier of subsea pipelines laid on a sloping seabed”, Marine Structures, Vol. 82, 103155.
• Wang, ZK. and Guedes Soares, C. (2022) “Lateral buckling of subsea pipelines triggered by a sleeper with a nonlinear pipe-soil interaction model”, Journal of Marine Science and Engineering, Vol. 10, 757.
• Wang, ZK., Chen, B.Q. and Guedes Soares, C. (2022), “Analytical study on the upheaval thermal buckling of sandwich pipes”, Marine Structures, Vol. 85, 103245.
• Li, RX., Chen, B.Q. and Guedes Soares, C. (2022), “Effect of ovality length on collapse strength of imperfect sandwich pipes due to local buckling”, Journal of Maritime Science and Engineering, Vol. 10, 12.
• Chen, B.Q., Zhang, X. and Guedes Soares, C. (2022), “The effect of general and localized corrosions on the collapse pressure of subsea pipelines”, Ocean Engineering, Vol. 247, 110719.
• Chen, B.Q., Zhang, X. and Guedes Soares, C. (2022), “The effect of general and localized corrosions on the collapse pressure of subsea pipelines”, Ocean Engineering, Vol. 247, 110719.
• Chen, B.Q., Videiro, P.M. and Guedes Soares, C. (2022), “Opportunities and challenges to develop digital twins for subsea pipelines”, Journal of Maritime Science and Engineering, Vol. 10, 739.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Uncertainty in collapse strength prediction of sandwich pipelines”, Journal of Offshore Mechanics and Arctic Engineering, Vol. 144, 041702.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Probabilistic safety assessment of the burst strength of corroded pipelines of different steel grades with calibrated strength models”, Marine Structures, Vol. 86, 103310.
  
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Probabilistic collapse design and safety assessment of sandwich pipelines”, Journal of Marine Science and Engineering, Vol. 10, 1435.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Failure assessment of corroded ultra-high strength pipelines under combined axial tensile loads and internal pressure. Ocean Engineering. 2022; 257 :111438.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Bayesian framework for reliability prediction of subsea processing systems accounting for influencing factors uncertainty”, Reliability Engineering and System Safety, Vol. 218, 108143.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Structural design and optimization of vertical subsea separator for deep water applications2, Trends in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, pp. 41-52.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2022), “Local buckling reliability assessment of corroded subsea pipelines under combined loads2, Developments in the Analysis and Design of Marine Structures, Amdahl, J. & Guedes Soares C. (Eds.), Taylor & Francis, London, UK, pp. 487-497.
• Wang, ZK. and Guedes Soares, C. (2021), “Upheaval thermal buckling of functionally graded subsea pipelines”, Applied Ocean Research, Vol. 116, 102881.
• Pacheco, M.R., Guedes Soares, C. and Riagusoff, I.I.T. (2021), “Strength analysis of corroded pipelines in subsea operation condition and heated product transport”, Developments in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, Vol. 1, pp. 721-726.
• Li, RX. and Guedes Soares, C. (2021), “Numerical study on the effects of multiple initial defects on the collapse strength of pipelines under external pressure”, International Journal of Pressure Vessels and Piping, Vol. 194, 104484.
• Li, RX., Chen, B.Q. and Guedes Soares, C. (2021), “Design equation for the effect of ovality on the collapse strength of sandwich pipes”, Ocean Engineering, Vol. 235, 109367.
• Li, RX. and Guedes Soares, C. (2021), “Numerical study on the effects of initial deflection on ultimate strength of pipeline under external pressure”, Developments in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, Vol. 1, pp. 705-712.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2021), “Reliability assessment of corroded pipelines with different burst strength models”, Developments in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, Vol. 1, pp. 687-696.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2021), “Burst strength assessment of X100 to X120 ultra-high strength corroded pipes”, Ocean Engineering, Vol. 241, 110004.
• Skerget, L.; Tadeu, A.; António, J. (2020), “Numerical simulation of heat transport in multilayered composite pipe”, Engineering Analysis with Boundary Elements, Vol. 120, pp. 28-37.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2020), “Reliability assessment of a subsea pipe-in-pipe system for major failure modes”, International Journal of Pressure Vessels and Piping”, Vol. 188, 104177.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2020), “Uncertainty in reliability of thick high strength pipelines with corrosion defects subjected to internal pressure”, International Journal of Pressure Vessels and Piping, Vol. 188, 104170.
• Bhardwaj, U., Teixeira, A.P. and Guedes Soares, C. (2020), “Uncertainty quantification of burst pressure models of corroded pipelines”, International Journal of Pressure Vessels and Piping, Vol. 188, 104208.
• Zhang, X., Chen, B.Q. and Guedes Soares, C. (2020), “Effect of non-symmetrical corrosion imperfection on the collapse pressure of subsea pipelines”, Marine Structures, Vol. 73, 102806.