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| When comparing ROP curves from different wells, a normalized curve (NROP) must be made for each well. Actual recorded values are corrected back (or normalized) to base values for each bit run using the following equation: | | When comparing ROP curves from different wells, a normalized curve (NROP) must be made for each well. Actual recorded values are corrected back (or normalized) to base values for each bit run using the following equation: |
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− | :<math>\mbox{NROP} = (\mbox{WOB}_{n} - \mbox{M})(\mbox{RPM}_{n})\times \mbox{L}(\mbox{dPb}_{n}\times \mbox{Q}_{n})</math> | + | :<math>\mbox{NROP} = (\mbox{WOB}_{n} - \mbox{M})(\mbox{RPM}_{n})\times \mbox{L}(\mbox{dPb}_{n}\times \mbox{Q}_{n}) \times \, (\mbox{WOB}_{o} - \mbox{M})(\mbox{RPM}_{o}) \times \mbox{L}(\mbox{dPb}_{o} \times \mbox{Q}_{o})</math> |
− | :<math>&\quad \ {\times}\, (\mbox{WOB}_{o} - \mbox{M})(\mbox{RPM}_{o}) \times \mbox{L}(\mbox{dPb}_{o} \times \mbox{Q}_{o})</math>
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| where | | where |
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| * <sub>''n''</sub> = normal value | | * <sub>''n''</sub> = normal value |
| * <sub>''o''</sub> = observed value | | * <sub>''o''</sub> = observed value |
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| ==See also== | | ==See also== |
| * [[Drilling problems]] | | * [[Drilling problems]] |
− | * [[Mudlogging: Drill cuttings analysis]]
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| * [[Introduction to wellsite methods]] | | * [[Introduction to wellsite methods]] |
− | * [[Wellbore trajectory]]
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− | * [[Conventional coring]]
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− | * [[Drilling fluid]]
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− | * [[Land rigs]]
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− | * [[Rig personnel]]
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| * [[Wellsite math]] | | * [[Wellsite math]] |
− | * [[Core handling]]
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− | * [[Mudlogging: Equipment, services, and personnel]]
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− | * [[Core alteration and preservation]]
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| * [[Wellsite safety]] | | * [[Wellsite safety]] |
− | * [[Sidewall coring]]
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− | * [[Show evaluation]]
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| * [[Mudlogging: The mudlog]] | | * [[Mudlogging: The mudlog]] |
| * [[Well planning]] | | * [[Well planning]] |
− | * [[Pressure detection]]
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− | * [[Drill stem testing]]
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| * [[Measurement while drilling]] | | * [[Measurement while drilling]] |
− | * [[Offshore rigs]]
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− | * [[Fishing]]
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− | * [[Core orientation]]
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− | * [[Mudlogging: Gas extraction and monitoring]]
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| ==External links== | | ==External links== |