Hourly activities:
00:00 - 01:15: Made up x-over above NM collars. RIH with 17 1/2" drilling BHA on DC/5 1/2" HWDP. Made up and ran hydraulic jar.
01:15 - 02:00: While observing with ROV, stabbed 17 1/2" BHA into 30" housing/cts funnel. RIH with 17 1/2" BHA to 220 m MD. ROV took position and started CTS pump. Not able to operate suction valve from pit#7 when attempting to start pumping.
02:00 - 02:30: Not able to operate suction valve from pit#7. Locked valve open.
02:30 - 03:45: Commenced pumping at 3500 LPM and tested communication to MWD OK. Observed severe cavitation in string. Reduced rate to 2000 LPM and washed down to 247 m MD and tagged TOC. Drilled cement inside 30" shoetrack. Drilling parameters 3500 LPM SPP 80 bar 40 RPM torque 1-3 KNM wob 4 MT.
03:45 - 05:00: Drilled and opened 36" 26" 17 1/2" rathole from 250 m to 260 m MD. Drilling parameters flow 3500 LPM SPP 82 bar 40 RPM wob 1-2 MT torque 2-3 KNM. Reamed through shoetrack rathole 3 times. Pumped 20 m3 hi-vis to clean hole.
05:00 - 06:00: Drilled new formation from 260 m to 265 m MD. Drilling parameters flow 3500 LPM SPP 83 bar 40 RPM wob 1-3 MT torque 2-3 KNM.
06:00 - 06:30: Pumped 15 m3 hi-vis sweep on bottom. Had to wait for WL gyro unit to become operational.
06:30 - 07:45: Had to wait for WL gyro unit to become purged and operational. This was caused by downtime on STB crane during the night, not able to do the lift in due time. Circulated at 3500 LPM and reciprocated pipe. Racked back stand and pulled bit inside conductor shoe to 223 m MD.
07:45 - 08:00: Removed masterbushing and installed automatic slips.
08:00 - 09:00: RIH with 17 1/2" BHA from 223 m to 262 m MD to obtain favourable stick up for running WL gyro. Not able to lay out single due to WL unit in v-door. Rigged up for running WL gyro. Held toolbox talk prior to running gyro.
09:00 - 10:00: RIH with gyro on WL, located gyro in UBHO and performed survey. Pulled out with gyro and performed survey while pulling out.
10:00 - 10:30: Attempted to orient toolface negative due to high torque. Pulled string to work out the torque, observed 25 MT overpull.
10:30 - 11:00: Attempted to pull inside shoe, observed 25 MT overpull.
11:00 - 12:15: Installed 5 m pup joint and made up TDS for pumping. String free down. Established circulation with 3100 LPM. Swept hole with 20 m3 hi-vis. Pulled 17 1/2" BHA from 262 m to 249 m MD inside conductor shoe. Got 11 m stick-up.
12:15 - 13:15: RIH with gyro on WL, located in UBHO and performed survey. Oriented toolface as required. Halted operation due to possible power-shut down during ESD test.
15:15 - 15:45: RIH with 17 1/2" BHA to 265 m MD. Laid out 5 m pup joint and made up stand.
15:45 - 00:00: Drilled 17 1/2" hole section from 265 m to 424 m MD. Slided and rotated according to instructions from DD. Drilling parameters 3500 LPM SPP 75-90 bar 100 RPM wob 1-9 MT torque 3-7 KNM. Increaed RPM to 140 during rotary drilling. Pumped 30 m3 hi-vis per stand to clean hole. Average ROP 19 m/hrs. Good correspondance between GWD and MWD obtained at 383 m MD.

24-hour summary: Rigged up WL gyro unit. Performed gyro survey and adjusted toolface. Waited while performing ESD test in process module. Drilled 17 1/2" section from 265 m to 560 m MD.