API J55 Steel Casing Pipe with an Initial Surface Crack under Internal Pressure - Determination of Fracture Parameters
Abstract
Seam casing pipe used in an oil drilling rig, manufactured by high frequency (HF) contact welding of API J55 steel, is tested. The influence of an initial defect (machined surface crack) is analysed, by performing pressure test of a pipe segment closed at both ends. Besides the damages at the internal surface, casing pipes are exposed to damage at the external surface, which is why such configuration is analysed here. Measurement of strains and crack mouth opening displacement (CMOD) enabled the application of direct method for J integral evaluation. This procedure is based on the path independence of the J integral and can be applied both in laboratory conditions (on specimens) and on structures. However, it requires a demanding experimental - computational procedure, which is accomplished here using the developed routine. Additionally, the behaviour of the pipe under internal pressure, including fracture mechanics parameters determination, is modelled numerically (by finite element m...ethod) in software package Abaqus. The pressure is applied as distributed load acting on the inner surface of the three-dimensional model, and axial tension is applied at the end of the pipe to simulate the closed end. J integral values determined numerically and using direct method are used for estimation of the critical pressure corresponding to the crack growth initiation. Additionally, plastic limit load, i.e. pressure which causes yielding of the ligament, is determined. Based on the results, criteria for pipe integrity assessment are discussed.
Keywords:
Casing pipe / Surface crack / Direct method for J integral evaluation / Finite element method / Pipe integritySource:
Advances in Fracture and Damage Mechanics X, 2012, 488-489, 577-+Publisher:
- Trans Tech Publications Ltd, Durnten-Zurich
Funding / projects:
- Development of new revitalization methodologies for hydro power plant turbine and hydro-mechanical equipment in relation to causes of material degradation (RS-MESTD-Technological Development (TD or TR)-35002)
- Micromechanical criteria of damage and fracture (RS-MESTD-Basic Research (BR or ON)-174004)
DOI: 10.4028/www.scientific.net/KEM.488-489.577
ISBN: 978-303785218-7
ISSN: 1013-9826
WoS: 000306531200141
Scopus: 2-s2.0-80053971746
Institution/Community
Tehnološko-metalurški fakultetTY - CONF AU - Rakin, Marko AU - Međo, Bojan AU - Arsić, Miodrag AU - Šarkočević, Živče AU - Ivanović, I. AU - Sedmak, Aleksandar PY - 2012 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2216 AB - Seam casing pipe used in an oil drilling rig, manufactured by high frequency (HF) contact welding of API J55 steel, is tested. The influence of an initial defect (machined surface crack) is analysed, by performing pressure test of a pipe segment closed at both ends. Besides the damages at the internal surface, casing pipes are exposed to damage at the external surface, which is why such configuration is analysed here. Measurement of strains and crack mouth opening displacement (CMOD) enabled the application of direct method for J integral evaluation. This procedure is based on the path independence of the J integral and can be applied both in laboratory conditions (on specimens) and on structures. However, it requires a demanding experimental - computational procedure, which is accomplished here using the developed routine. Additionally, the behaviour of the pipe under internal pressure, including fracture mechanics parameters determination, is modelled numerically (by finite element method) in software package Abaqus. The pressure is applied as distributed load acting on the inner surface of the three-dimensional model, and axial tension is applied at the end of the pipe to simulate the closed end. J integral values determined numerically and using direct method are used for estimation of the critical pressure corresponding to the crack growth initiation. Additionally, plastic limit load, i.e. pressure which causes yielding of the ligament, is determined. Based on the results, criteria for pipe integrity assessment are discussed. PB - Trans Tech Publications Ltd, Durnten-Zurich C3 - Advances in Fracture and Damage Mechanics X T1 - API J55 Steel Casing Pipe with an Initial Surface Crack under Internal Pressure - Determination of Fracture Parameters EP - + SP - 577 VL - 488-489 DO - 10.4028/www.scientific.net/KEM.488-489.577 ER -
@conference{ author = "Rakin, Marko and Međo, Bojan and Arsić, Miodrag and Šarkočević, Živče and Ivanović, I. and Sedmak, Aleksandar", year = "2012", abstract = "Seam casing pipe used in an oil drilling rig, manufactured by high frequency (HF) contact welding of API J55 steel, is tested. The influence of an initial defect (machined surface crack) is analysed, by performing pressure test of a pipe segment closed at both ends. Besides the damages at the internal surface, casing pipes are exposed to damage at the external surface, which is why such configuration is analysed here. Measurement of strains and crack mouth opening displacement (CMOD) enabled the application of direct method for J integral evaluation. This procedure is based on the path independence of the J integral and can be applied both in laboratory conditions (on specimens) and on structures. However, it requires a demanding experimental - computational procedure, which is accomplished here using the developed routine. Additionally, the behaviour of the pipe under internal pressure, including fracture mechanics parameters determination, is modelled numerically (by finite element method) in software package Abaqus. The pressure is applied as distributed load acting on the inner surface of the three-dimensional model, and axial tension is applied at the end of the pipe to simulate the closed end. J integral values determined numerically and using direct method are used for estimation of the critical pressure corresponding to the crack growth initiation. Additionally, plastic limit load, i.e. pressure which causes yielding of the ligament, is determined. Based on the results, criteria for pipe integrity assessment are discussed.", publisher = "Trans Tech Publications Ltd, Durnten-Zurich", journal = "Advances in Fracture and Damage Mechanics X", title = "API J55 Steel Casing Pipe with an Initial Surface Crack under Internal Pressure - Determination of Fracture Parameters", pages = "+-577", volume = "488-489", doi = "10.4028/www.scientific.net/KEM.488-489.577" }
Rakin, M., Međo, B., Arsić, M., Šarkočević, Ž., Ivanović, I.,& Sedmak, A.. (2012). API J55 Steel Casing Pipe with an Initial Surface Crack under Internal Pressure - Determination of Fracture Parameters. in Advances in Fracture and Damage Mechanics X Trans Tech Publications Ltd, Durnten-Zurich., 488-489, 577-+. https://doi.org/10.4028/www.scientific.net/KEM.488-489.577
Rakin M, Međo B, Arsić M, Šarkočević Ž, Ivanović I, Sedmak A. API J55 Steel Casing Pipe with an Initial Surface Crack under Internal Pressure - Determination of Fracture Parameters. in Advances in Fracture and Damage Mechanics X. 2012;488-489:577-+. doi:10.4028/www.scientific.net/KEM.488-489.577 .
Rakin, Marko, Međo, Bojan, Arsić, Miodrag, Šarkočević, Živče, Ivanović, I., Sedmak, Aleksandar, "API J55 Steel Casing Pipe with an Initial Surface Crack under Internal Pressure - Determination of Fracture Parameters" in Advances in Fracture and Damage Mechanics X, 488-489 (2012):577-+, https://doi.org/10.4028/www.scientific.net/KEM.488-489.577 . .