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Line 69: − + − :<math>&\quad \ {\times}\, (\mbox{WOB}_{o} - \mbox{M})(\mbox{RPM}_{o}) \times \mbox{L}(\mbox{dPb}_{o} \times \mbox{Q}_{o})</math> − Line 84:
Line 82: − * [[Mudlogging: Drill cuttings analysis]] − * [[Wellbore trajectory]] − * [[Conventional coring]] − * [[Drilling fluid]] − * [[Land rigs]] − * [[Rig personnel]] − * [[Core handling]] − * [[Mudlogging: Equipment, services, and personnel]] − * [[Core alteration and preservation]] − * [[Sidewall coring]] − * [[Show evaluation]] − * [[Pressure detection]] − * [[Drill stem testing]] − * [[Offshore rigs]] − * [[Fishing]] − * [[Core orientation]] − * [[Mudlogging: Gas extraction and monitoring]]
equation and see also list
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:
:<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>
where
where
* <sub>''n''</sub> = normal value
* <sub>''n''</sub> = normal value
* <sub>''o''</sub> = observed value
* <sub>''o''</sub> = observed value
==See also==
==See also==
* [[Drilling problems]]
* [[Drilling problems]]
* [[Introduction to wellsite methods]]
* [[Introduction to wellsite methods]]
* [[Wellsite math]]
* [[Wellsite math]]
* [[Wellsite safety]]
* [[Wellsite safety]]
* [[Mudlogging: The mudlog]]
* [[Mudlogging: The mudlog]]
* [[Well planning]]
* [[Well planning]]
* [[Measurement while drilling]]
* [[Measurement while drilling]]
==External links==
==External links==