Hourly activities:
00:00 - 00:15: Drilled rathole and shoe from 197 m to 201 m MD. Drilling parameters flow 4400 LPM SPP 62 bar rotation 45 RPM torque 1-6 KNM wob 1-8 MT. Reamed back inside shoe for every 2 m drilled.
00:15 - 00:45: Drilled 2 m new formation from 204 m to 206 m MD. Drilling parameters flow 4400 LPM SPP 62 bar rotation 45 RPM torque 1-2 KNM wob 1-2 MT. Pumped 20 m3 his-vis sweep to clean hole.
00:45 - 03:45: POOH with 26" junk removal BHA from 206 m MD to surface on 5 1/2" HWDP. Laid down 1 x 8 1/4" DC. Racked back jar/dc assy. Lifted UBHO/MWD assy to HTS due to wind speed limitations on crane. Pulled 9 3/4" DC/BIT stand to surface and inspected 26" rock bit. Found 2 x pieces of junk trapped in roller cones. Removed 1 piece of 800 g. The other piece was jammed in middle of the bit and could not be removed easily. Also found several worn teeth on bit.
03:45 - 04:30: Broke 26" bit and bit sub. Racked back stand of 9 3/4" DC.
04:30 - 05:30: Ran 26" drilling BHA from surface to 70 m MD.
05:30 - 06:00: Ran 26" drilling BHA from 70 m to 133 m MD.
06:00 - 07:00: RIH with 26" drilling BHA from 133 m to 206 m MD. Stabbed into CTS funnel while observing with ROV.
07:00 - 08:45: Established drilling parameters. Drilled 26" hole section from 206 m to 211 m MD. Drilling parameters flow 3100 LPM SPP 62 bar 1-2 MT wob rotation 125 RPM string torque 1-3 KNM. Pumped 20 m3 hi-vis to clean the hole at 211 m MD. Scientifc drilling reported that UBHO sleeve had not been fastened correctly in the carrier. Decided to pull BHA for remedial action.
08:45 - 10:00: POOH with 26" drilling BHA from 211 m MD to 63 m MD. No drag observed when pulling BHA through conductor shoe. Racked back DC/JAR and NMDC stands to access UBHO sub.
10:00 - 11:00: Checked UBHO relative to scribeline. Checked and thightened UBHO sleeve. Inspected 26" bit at centralizer deck no wear observed.
11:00 - 13:30: Made up and RIH with 26" drilling BHA from 63 m to 196 m MD. Stabbed into CTS funnel while observing with ROV.
13:30 - 13:45: Washed down with 26" drilling BHA from 196 m to 209 m MD pumping at 2000 LPM.
13:45 - 15:15: Performed singel shot survey on WL with bit inside conductor shoe. Inclination 0,33 deg azimuth 306,1 deg toolface 050 deg. Halted drilling operation for software upgrade on siemens f&g system.
15:15 - 18:45: Stand-by for software upgrade of siemens f&g system. At 18 15 hrs washed down to 209 m MD while pumping at 2000 LPM. Shut down pumps and waited for GMWD to reset.
18:45 - 19:00: Pumped at 2000 LPM and obtained GMWD survey rejected survey.
19:00 - 20:00: Slided 26" drilling BHA from 211 m to 217 m MD. Drilling parameters flow 3100 LPM SPP 62 bar 1-3 wob rotation 95 RPM RPM) string torque 0-1 KNM. Pumped 10 m3 hi-vis sweep. Picked off bottom and hung off on slips.
20:00 - 21:15: Performed single shot survey on WL. Inclination 0,2 deg azimuth 243,9 deg toolface 112 deg. Pumped at 2000 LPM to obtain GMWD survey rejected data.
21:15 - 22:15: Slided 26" drilling BHA from 217 m to 226 m MD. Drilling parameters flow 3100 LPM SPP 62 bar 2-6 wob rotation 95 RPM RPM) string torque 0-1 KNM. Pumped 10 m3 hi-vis sweep. Picked off bottom and hung off on slips.
22:15 - 23:00: Performed single shot survey on WL. Inclination 0,37 deg azimuth 297,4 deg toolface 112 deg. Pumped at 2000 LPM to obtain GMWD survey rejected data.
23:00 - 00:00: Slided 26" drilling BHA from 226 m to 233 m MD. Drilling parameters flow 3100 LPM SPP 62 bar 2-6 MT wob rotation 95 RPM RPM) string torque 0-1 KNM.

24-hour summary: Drilled 26" hole from 206 m to 211 m MD. Pulled BHA to thighten UBHO sleeve. RIH with BHA. Waited for work on siemens system. Drilled 26" hole from 211 to 269 m MD, steered as required. Performed gyro single shot survey on each single drilled.