DRILLNOVA,Roller-bit drilling interval log
Make a setting change interpretable without mixing cutting time with interruptions.

Date / shift,
Rig model and crowd system,
Kelly configuration,
Barrel identifier / diameter / layout,
Formation and rock-entry depth,
Pressure-display channel / units,
"OEM conversion or measurement reference, if available",
Site-agreed operating envelope,

Interval start / end time,Clock source,Start / end depth (m),Actual cutting time (min),Rotary-head RPM (steady value or range),Crowd reading + units,Changed variable,Vibration / resistance,Lift / clear / recover time (min),Tool inspection / action
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Fluid and bore-condition observations,
Before/after tool-photo references,
Accepted baseline for the next interval,
Reason for pause or stop,
Reviewed by,
Engine RPM and rotary-head RPM require separate labels.
Do not convert hydraulic pressure to WOB without the applicable rig information.
Calculate ROP only from a defined interval; advance per revolution = ROP / (60 × RPM) only for consistent cutting and speed data.
"No WOB, RPM, lift distance or fixed inspection interval is prefilled."