Study on the Mechanical Characteristics and Operating Envelope of Freestanding Drilling Riser in Deepwater Drilling
- Yanbin Wang (China University of Petroleum, Beijing) | Deli Gao (China University of Petroleum, Beijing)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- September 2020
- Document Type
- Journal Paper
- 357 - 368
- 2020.Society of Petroleum Engineers
- mechanical behavior, optimization, operation envelope, freestanding drilling riser
- 32 in the last 30 days
- 79 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 35.00|
Freestanding drilling riser (FSDR), a new type of riser in deepwater drilling, though not in commercial use, can significantly reduce the engineering sensitivity to severe weather compared to the conventional risers. The optimal installation depth of the near surface disconnection package (NSDP) and the optimal number of buoyancy cans are two important parameters in the FSDR system. In this paper, the key mechanical problems of the FSDR system have been proposed and the mechanics of the FSDR system in normal drilling mode and freestanding mode have been studied. The above two optimal parameters have been calculated on the basis of a specific marine environment and system configuration. The operating envelope of the FSDR system has been figured out through parameter sensitivity analysis. Analysis results show that the NSDP should be installed 200 m below the sea surface to avoid strong wave-current profile and enhance the performance of the FSDR in freestanding mode. From the mechanical point of view, the weakest section of the FSDR is located at the junction between the buoyancy cans and the riser joints, where stress joint should be equipped to improve the stress condition of the system. Further, the maximum von Mises stress of the FSDR in normal drilling mode is the dominant factor restricting the increase of the number of buoyancy cans. The normal operating envelope of the FSDR is mainly limited by the deflection angle of the upper flexible joint (UFJ) and the von Mises stress. On the basis of the mechanics and operating criteria of the FSDR, the optimal number of buoyancy cans is six and the vessel offset should be less than 2% of the water depth to ensure the safety of the FSDR in normal drilling mode. Finally, suggestions on the future study on the FSDR system have been proposed.
|File Size||4 MB||Number of Pages||12|
API RP 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser System. 2017. Washington, DC, USA: API.
Chang, Y. J., Chen, B., Chen, G. M. et al. 2009. The Progress of New Deepwater Drilling Riser Technology and Proposal of Its Application in South China Sea. China Offshore Oil Gas 21 (6): 407–412. https://doi.org/10.16082/j.cnki.issn.1001-4578.2018.07.008.
Chau, N., Ricky, T., and Frank, L. 2006. Storm-Safe Deepwater Drilling Riser. Paper presented at the IADC/SPE Asia Pacific Drilling Conference, Bangkok, Thailand, 13–15 November. SPE-103338-MS. https://doi.org/10.2118/103338-MS.
Fisher, E. D., Holley, P., and Brashier, S. 1995. Development and Deployment of a Freestanding Production Riser in the Gulf of Mexico. Paper presented at the Offshore Technology Conference, Houston, Texas, USA, 1–4 May. OTC-7770-MS. https://doi.org/10.4043/7770-MS.
Florager, C. and Balash, C. 2017. Vortex-Induced Motion of a Free-Standing Riser Below the Critical Mass Ratio. Paper presented at the International Conference on Ocean, Offshore and Arctic Engineering, Trondheim, Norway, June 25–30. OMAE2017-61399. https://doi.org/10.1115/OMAE2017-61399.
Franklin, R., Herman, R. J., Allen, T. J. et al. 2000. Lessons Learned: The Free-Standing Production Riser. Paper presented at the Offshore Technology Conference, Houston, Texas, USA, 1–4 May. OTC-12125-MS. https://doi.org/10.4043/12125-MS.
Guo, R. 2012. Study on Buoyancy Can Group for Freestanding Drilling Riser System. MS thesis, China University of Petroleum, East China.
Huang, Y. 2016. The Investigation of FSHR Wall Thickness and Material Selection Method. Ocean Eng Equip Technol 3 (3): 184–188.
Kang, Z., Li, H., Sun, L. P. et al. 2011a. Global Strength and Sensitivity Parameters Analysis of Free-Standing Hybrid Riser. Ship Eng 33 (5): 73–78. https://doi.10.1016/j.preteyeres.2010.11.001.
Kang, Z., Li, H., Sun, L. P. et al. 2011b. General Design and Analysis of the Free-Standing Hybrid Riser. Ship Ocean Eng 40 (5): 154–159. https://doi.org/10.3963/j.issn.1671-7953.2011.05.045.
Kang, Z., Li, H., Sun, L. P. et al. 2011c. Free-Standing Hybrid Riser Global Motion Fatigue Analysis. Ocean Eng 29 (4): 43–50. https://doi.org/10.16483/j.issn.1005-9865.2011.04.004.
Kim, K. S., Choi, H. S., and Kim, K. S. 2018. Preliminary Optimal Configuration on Free-Standing Hybrid Riser. Int J Naval Arch Ocean Eng 10: 250–258. https://doi.org/10.1016/j.ijnaoe.2017.10.012.
Kogure, E., Ohashi, M., Urabe, S. et al. 1998. Applications of a Near Surface Disconnectable Drilling Riser in Deepwater. Paper presented at the IADC/SPE Asia Pacific Drilling Conference, Jakarta, Indonesia, 7–9 September. SPE-47828-MS. https://doi.org/10.2118/47828-MS.
Kristiansen, P. and O’Donnell, J. 2011. Design, Qualification and Fabrication of Fatigue Critical Welds for Free-Standing Hybrid Riser Systems. Paper presented at the Offshore Technology Conference, Rio de Janeiro, Brazil, 4–6 October. OTC-22544-MS. https://doi.org/10.4043/22544-MS.
Li, R. 2017. The Dynamic Response Analysis of Free-Standing Hybrid Riser. MS thesis, China University of Petroleum (Beijing), China.
Liu, J. N. 2011. Design and Analysis of the Buoyancy Can in Free-Standing Hybrid Risers. MS thesis, Harbin Engineering University, Harbin, China.
Luppi, A., Cousin, G., and O’Sullivan, R. 2014. Deep Water Hybrid Riser Systems. Paper presented at the Offshore Technology Conference Asia, Kuala Lumpur, Malaysia, 25–28 March. OTC-24802-MS. https://doi.org/10.4043/24802-MS.
Machado Filho, R. Z., Mastrangelo, C. F., Daniel, J. et al. 2013. Cascade/Chinook Disconnectable FPSO, Free-Standing Hybrid Risers Monitoring Via Acoustic Control/Communications. Paper presented at the Offshore Technology Conference Brazil, Rio de Janeiro, Brazil, 29–31 October. OTC-24495-MS. https://doi.org/10.4043/24495-MS.
Millheim, K. K. and Aune, G. 2012. Self Standing Riser Offers Alternative to Conventional Deep Water Approach for Developing Marginal Deep Water Oil and Gas Resources. Paper presented at the International Petroleum Technology Conference, Bangkok, Thailand, 7–9 February. IPTC-15235-MS. https://doi.org/10.2523/IPTC-15235-MS.
Morten, B., Leiv, W., and Terje, K. 2000. FPDSO with Near Surface Disconnect Drilling System. Paper presented at the Offshore Technology Conference, Houston, Texas, USA, 1–4 May. OTC-11903-MS. https://doi.org/10.4043/11903-MS.
Remery, J., Silva, C., and Mesnage, O. 2008. The Free-Standing Flexible Riser: A Novel Riser System for an Optimised Installation Process. Paper presented at the Offshore Technology Conference, Houston, Texas, USA, 5–8 May. OTC-19437-MS. https://doi.org/10.4043/19437-MS.
Roche, J. R., Reynolds, G. E., and Robert, K. C. 1999. Multipurpose Vessel with Free-Standing Riser Can Cut Deepwater Well Costs 15%. Offshore, https://www.offshore-mag.com/articles/print/volume-59/issue-4/news/general-interest/multi-purpose-vessel-with-freestanding-riser-can-cut-deepwater-well-costs-15.html.
Song, R. X. and Streit, P. 2011. Design of the World’s Deepest Hybrid Riser System for the Cascade & Chinook Development. Paper presented at the Offshore Technology Conference, Houston, Texas, USA, 2–5 May. OTC-21338-MS. https://doi.org/10.4043/21338-MS.
Sun, L. P., Xu, Y., and Yang, W. 2016. Dynamic Strength and Fatigue Analysis of Free-Standing Hybrid Riser in South Sea. Ship Eng 38 (10): 1–6. https://doi.org/10.13788/j.cnki.cbgc.2016.10.001.
Tan, R. L., Duan, M. L., Wang, Z. M. et al. 2018. Numerical Calculation Model Investigation on Response for Connector Assembly of a Free-Standing Hybrid Riser with Experimental Validation. Ocean Eng 155: 144–155. https://doi.org/10.1016/ j.oceaneng. 2017.12.041.
Wang, Y. B., Gao, D. L., and Fang, J. 2014. Static Analysis of Deep-Water Marine Riser Subjected to Both Axial and Lateral Forces in Its Installation. J Nat Gas Sci Eng 19: 84–90. https://doi.org/10.1016/j.jngse.2014.04.019.
Yong, H. Y., Liew, M. S., Ovinis, M. et al. 2018. Hydrodynamic Study of Free-Standing Drilling Risers under Typhoon Generated Swell. Paper presented at the Offshore Technology Conference Asia, Kuala Lumpur, Malaysia, 20–23 March. OTC-28485-MS. https://doi.org/10.4043/28485-MS.
Zhou, X. K. and Duan, M. L. 2017. Influence of Buoyancy Tank on Axial Vibration of Freestanding Rigid Riser. China Pet Mach 45 (7): 52–57. https://doi.org/10.16082/j.cnki.issn.1001-4578.2017.07.011.
Zhou, X. K. Duan, M. L., Gu, J. J. et al. 2016. Numerical Simulation and Experimental Investigation on the Upper and Lower Assemblies of Free-Standing Hybrid Riser System. Paper presented at the International Ocean and Polar Engineering Conference, Rhodes, Greece, 26 June–1 July. ISOPE-1-16-211.
Zhu, Y. R. 1991. Wave Mechanics for Ocean Engineering. Tianjin, China: Tianjin University Press.