All issues Volume 74 (2019) Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 74 (2019) 71 Full HTMLStrength criteria of operability envelopes for parallel strings (DNV-OS-F201, 2010).
| Limiting factors | Restrictive conditions |
|---|---|
| The maximum equivalent stress of the riser/yield strength | 0.80 |
| The maximum equivalent stress of the string/yield strength | 0.67 |
| Maximum bending moment of wellhead/yield strength | 0.80 |
| The maximum deflection angle of the string | 2° |
| The maximum deflection angle of the riser | 9° |
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