DCB test: A review of critical parameters
Conference
·
OSTI ID:696969
- Vallourec Research Center, Aulnoye-Aymeries (France). Corrosion and Metallurgical Dept.
- Vallourec Mannesmann Oil and Gas France, Aulnoye-Aymeries (France)
The presence of H{sub 2}S in well fluids imposes severe restrictions on the use of tubular goods because of sulfide stress cracking (SSC). Increasing developments of deep sour wells require high strength OCTG with improved SSC resistance. The appropriate selection of materials for well completion is an important factor in economic success of oil and gas production. Corrosion cracking behavior of metals for the range of environments expected in service is the main criterion. Such knowledge is gained partly from service experience, but mainly from appropriate laboratory testing at the design stage. The Double Cantilever Beam test has elicited considerable interest despite the traditional lab testing procedures as NACE tensile, Bent beam and C-ring tests. This popularity is attributed to the quantitative characterization nature of the test. Since the Klssc values obtained from DCB tests may be used in fracture mechanics evaluations (design and fitness for service purposes) the accuracy and precision of the calculated Klssc becomes quite important. This paper summarizes observations made by the authors over the last few years on the DCB specimen and associated testing methodology. Finally performances of C90 to C110 materials are discussed regarding the acceptance criteria of oil companies and compared with the behavior in standard tensile test.
- OSTI ID:
- 696969
- Report Number(s):
- CONF-990401--
- Country of Publication:
- United States
- Language:
- English
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