A Unified Approach to Yield, Buckling, and Leak in Well Tubulars
- Malcolm A. Goodman (Altus Well Experts, Inc.)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- March 2018
- Document Type
- Journal Paper
- 27 - 40
- 2018.Society of Petroleum Engineers
- Tubular Connections, Connection Leak, Yield and Buckling, Casing Design, Tubing Design
- 3 in the last 30 days
- 292 since 2007
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Yield and buckling are independent of hydrostatic pressure. However, leak in a threaded connection depends on hydrostatic pressure, and hence, leak resistance is a function of connector location in the string. It also means that von Mises stress alone is insufficient to characterize connection leak. Like pipe-body yield and buckling, a simple consistent failure theory derived from principles of mechanics is proposed for leak in threaded connections. In addition, the buckling fictitious force is reformulated as a nonfictitious expression to clearly show independence of hydrostatic pressure. Two leak constants—thread modulus and makeup leak resistance—are introduced and evaluated with simple example cases. To quantify results, a 7-in. long-thread-casing (LTC) connection is modeled with the new leak criterion, and results demonstrate that the connection can withstand differential pressures higher than the published ratings because of hydrostatic pressure. A new connection safety factor is defined, and a leak line and a leak circle are developed for graphical purposes to quickly identify critical loads for leak.
|File Size||1 MB||Number of Pages||14|
API SPEC 5B, Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads, 15th edition. 2008. Washington, DC: API.
API TR 5C3, Addendum to Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe Used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing. 2015. Washington, DC: API.
Carcagno, G. 2005. The Design of Tubing and Casing Premium Connections for HPHT Wells. Presented at the SPE High Pressure/High Temperature Sour Well Design Applied Technology Workshop, The Woodlands, Texas, 17–19 May. SPE-97584-MS. https://doi.org/10.2118/97584-MS.
Chen, W. F. and Saleeb, A. F. 1994. Constitutive Equations for Engineering Materials: Elasticity and Modeling, Vol. 1, second edition. Amsterdam: Elsevier.
Drucker, D. C. and Prager, W. 1952. Soil Mechanics and Plastic Analysis for Limit Design. Q. Appl. Math. 10 (2): 157–165.
Fjar, E., Holt, R. M., Raaen, A. M. et al. 2008. Petroleum Related Rock Mechanics, second edition. Amsterdam: Elsevier.
Gonzalez, M. E., Wu, J., Hensley, J. R. et al. 2005. The Effect of Radial Loads on Connection Design in Ultra High Pressure Wells. Presented at the SPE High Pressure/High Temperature Sour Well Design Applied Technology Workshop, The Woodlands, Texas, 17–19 May. SPE-97587-MS. https://doi.org/10.2118/97587-MS.
Goodman, M. A. and Cowin, S. C. 1971. Two Problems in the Gravity Flow of Granular Materials. J. Fluid Mech. 45 (2): 321–339. https://doi.org/10.1017/S0022112071000065.
Goodman, M. A. and Cowin, S. C. 1972. A Continuum Theory for Granular Materials. Arch. Ration. Mech. An. 44 (4): 249–266. https://doi.org/10.1007/BF00284326.
Goodman, M. A., Kalil, I. A., McSpadden, A. R. et al. 2017. New Tubular Design Ellipse with Backup Pressure. Presented at the SPE Bergen One Day Seminar, Bergen, Norway, 5 April. SPE-185941-MS. https://doi.org/10.2118/185941-MS.
ISO 13679, Petroleum and Natural Gas Industries–Procedures for Testing Casing and Tubing Connections, first edition. 2002. Geneva, Switzerland: ISO.
Japar, N. J., Grant, L., Van den Haag, A. et al. 2014. An Innovative and Systematic Approach to Delivering a Multitude of Next Generation Tubular Connections Required for Extremely Complex Design Conditions. Presented at the SPE Annual Technical Conference and Exhibition, Amsterdam, 27–29 October. SPE-170961-MS. https://doi.org/10.2118/170961-MS.
Jellison, M. J. and Brock, J. N. 2000. The Impact of Compression Forces on Casing-String Designs and Connectors. SPE Drill & Compl 15 (4): 241–248. SPE-67608-PA. https://doi.org/10.2118/67608-PA.
Johnson, R., Jellison, M. J., and Klementich, E. F. 1987. Triaxial-Load-Capacity Diagrams Provide a New Approach to Casing and Tubing Design Analysis. SPE Drill Eng 2 (3): 268–274. SPE-13434-PA. https://doi.org/10.2118/13434-PA.
Klementich, E. F. 1995. Unravelling the Mysteries of Proprietary Connections. J Pet Technol 47 (12): 1055–1059. SPE-35247-PA. https://doi.org/10.2118/35247-PA.
Lubinski, A. 1975. Influence of Neutral Axial Stress on Yield and Collapse of Pipe. J. Eng. Ind. 97 (2): 400–407. https://doi.org/10.1115/1.3438599.
Lubinski, A., Althouse, W. S., and Logan, J. 1962. Helical Buckling of Tubing Sealed in Packers. J Pet Technol 14 (6): 655–670. SPE-178-PA. https://doi.org/10.2118/178-PA.
Mitchell, R. F. 2008. Tubing Buckling - The State of the Art. SPE Drill & Compl 23 (4): 361–370. SPE-104267-PA. https://doi.org/10.2118/104267-PA.
Reddy, J. N. 2010. Principles of Continuum Mechanics: A Study of Conservation Principles and Applications. New York City: Cambridge University Press.
Sugino, M., Nakamura, K., Yamaguchi, S. et al. 2010. Development of an Innovative High-Performance Premium Threaded Connection for OCTG. Presented at the Offshore Technology Conference, Houston, 3–6 May. OTC-20734-MS. https://doi.org/10.4043/20734-MS.
Wikipedia. 2016. Drucker–Prager yield criterion (10 August 2016 revision), https://en.wikipedia.org/w/index.php?title=Drucker%E2%80%93Prager_yield_criterion&oldid=733840307 (accessed 10 December 2017).
Wikipedia. 2017. Von Mises yield criterion (29 November 2017 revision), https://en.wikipedia.org/w/index.php?title=Von_Mises_yield_criterion&oldid=812733048 (accessed 10 December 2017).