| Code | Activity | Description |
|---|---|---|
| 0 | Undefined Status | Anything not covered by other activity codes. |
| 1 | Rig Up & Tear Down | The act of installing and removing the rig. The start and end of these operations will be specified by the operator. |
| 2 | Drilling | The process of making new hole. |
| 3 | Connection (drilling) | The process of adding a joint of drillpipe to the string. |
| 4 | Reaming | Return to total depth with pumps on, pipe rotating and/or weight on bit. |
| 5 | Hole Opening | Act of opening pilot hole to full gauge. |
| 6 | Coring | Act of cutting a conventional core. |
| 7 | Condition and/or Circulate Mud | Pumps on with pipe turning slowly and/or some pipe reciprocation and/or no weight on bit and no increase in total depth. |
| 8 | Tripping In | The act of running the drillstring into the hole. |
| 9 | Tripping Out | The act of pulling the drillstring from the hole. |
| 10 | Lubricate Rig | Regularly scheduled service or preventative maintenance which interrupts the current rig activity. |
| 11 | Rig Repair | An unscheduled interruption to the current rig activity resulting from equipment failure, e.g. blown pop-off valve, blown swivel packing, dropping blocks etc. |
| 12 | Cut / Slip Drilling Line | The act of cutting and slipping the drilling line. |
| 13 | Deviation Survey | The activity associated with taking a survey. |
| 14 | Wireline Logs | Time spent rigging up, running, and rigging down wireline tools. |
| 15 | Run Casing | The time from rigging up to run casing/liner until casing/liner is in position. |
| 16 | Cementing | The time spent on cementing operations. |
| 17 | Plug Back | The time spent setting a cement plug. This does not include tripping. |
| 18 | Squeeze Cementing | The time spent performing a cement squeeze job. This does not include tripping. |
| 19 | Wait On Cement | The time required for the cement to gain sufficient strength to drillout, or the time required by a regulatory agency after the cement plug is bumped. This time will be supplied by the operator. |
| 20 | Drill Cement and/or Float Equipment | Drilling cement, float collar and/or casing shoe following a cement job, plug back, sidetrack etc. |
| 21 | Nipple Up / NippleDown BOP Stack | The act of installing or removing the BOP stack. This time will be recorded only if it exceeds the wait-on-cement time. |
| 22 | Test BOP | Regularly scheduled BOP test after casing, etc. |
| 23 | Drill Stem Test | The time spent drill stem testing. This does not include tripping the test tool. |
| 24 | Fishing | The time spent attempting to fish items from the hole. This does not include tripping. |
| 25 | Directional Work | The time spent performing directional work (not simply a survey). This does not include tripping. |
| 26 | Well Control | Well kill and associated operations, e.g. observe pressures, weight up mud, circulate on choke, etc. |
| 27 | Stuck Pipe | Act of freeing pipe which cannot be pulled by normal processes. |
| 28 | Wait on Weather | Waiting caused by adverse weather conditions. |
| 29 | Subsea | Run / Pull Riser, stack, wear bushing, etc. |
| 30 | Flow Check | Check for fluid flow from well while not pumping |
| 31 | Pressure Integrity Test | Pressure test on the casing or a "leak-off" test on exposed formation. |
| 32 | Lost Circulation | Time spent combatting lost circulation problems |
| 33 | Short Trip In | The act of running the drillstring back to bottom after a short trip. |
| 34 | Short Trip Out | The act of pulling the drillstring for a short trip. |