Hourly activities:
00:00 - 01:30: Discussed situation. Decided to attempt sweeping hole and place LCM pill across the grid formation. Mixed and weighed 1,43 SG 167 kg/m3 calcarb/steelseal LCM pill. Meanwhile circulated in well at 4500 LPM SPP 277 bar.
01:30 - 02:30: Pumped 19 m3 LCM pill and chased same with 64 m3 of OBM to put pill accross the grid formation. Pumprate 2000 LPM SPP 68 bar 30 RPM.
02:30 - 03:00: Lined up triptank and flowchecked well prevailing loss trend still loosing approx 350 l/hrs. Discussed situation, decided to start POOH.
03:00 - 04:00: POOH with 17 1/2" drilling BHA on 5 1/2" DP from 2568 m to 2366 m MD. Pulled 5 stands wet.
04:00 - 05:45: Pumped 4 m3 1,63 SG slug allowed mud level to stabilize. POOH with 17 1/2" drilling BHA on 5 1/2" DP from 2366 m 1764 m MD.
05:45 - 06:00: Flowchecked well 15 min due to apparently decreasing loss trend. Well static.
06:00 - 07:30: Filled triptanks. POOH with 17 1/2" drilling BHA on 5 1/2" DP from 1764 m to 1385 m MD. Took 10-15 MT overpull av 1385 m MD.
07:30 - 09:15: Made up TDS to drillstring in order to work through restriction from 1385 m MD. Broke circulation and staged up pumps to 3000 LPM SPP 111 bar. Rotated at 15-50 RPM and worked area from 1385 m to 1357 m MD. Observed torque peaks of 20 KNM at 1370 and 1381 m MD. Stopped rotation and circulation and pulled from 1385 m to 1357 m MD with no overpull. No overpull detected at shoedepth 1368 m MD.
09:15 - 10:30: Flow checked well at casing shoe. Observed static losses of 130 Removed skirt on TDS torque wrench and took measurements for tesco equipment as required.
10:30 - 10:45: Pumped 5 m3 1,67 SG slug.
10:45 - 12:15: POOH with 17 1/2" drilling BHA on 5 1/2" DP from 1357 m to 147 m MD. Tripping speed 806 m/hrs.
12:15 - 12:45: Flowchecked prior to POOH with BHA well static. Meanwhile re-arranged equipment on drillfloor for racking 17 1/2" drilling BHA due to winds exceeding set limits for crane. Held toobox talk for racking back BHA.
12:45 - 13:30: Removed PS-30 slips from rotary. Installed masterbushing and bowl. Re-arranged equipment on drillfoor as required for racking BHA.
13:30 - 16:00: POOH with 17 1/2" dirlling BHA. Broke and racked back 5 1/2" HWDP, DC/ACCELLERATOR, DC/JAR, NMDC/DC and arc/powerpulse/powerdrive. Gauged and graded bit.
16:00 - 16:15: Cleaned and tidied drillfloor.
16:15 - 18:00: Picked up jet sub. Picked up and made up wbrrt. RIH on 5 1/2" DP from surface to 140 m MD. Jetted BOP on way in at 3400 LPM SPP 22 bar.
18:00 - 18:30: Jettted across wellhead at 1800 LPM SPP 18 bar. Pulled nominal seat protector in wellhead.
18:30 - 20:15: POOH with wbrrt on 5 1/2" DP from 140 m MD to surface. Released NSP from wbrrt. Broke and laid out wbrrt and jet sub.
20:15 - 20:45: Cleared and tidied drillfloor. Inspected aft PRS rollers and dies prior to casing running.
20:45 - 21:00: Held toolbox talk for rigging casing running equipment.
21:00 - 22:30: Changed elevator on TDS. Installed FJE in aft PRS.
22:30 - 00:00: Installed casing tong on IR tracks. Made up DP x-over to 13 3/8" casing swadge. Meanwhile lined up cement unit to pump down f-14 injection annulus. Stepped up pressure from 126 bar to 138 bar when sudden leak off to 60 bar was observed. Continued injection and stepped up pump rate to 1000 LPM cup 71 bar. Injected 150 m3 seawater at 1000-1200 LPM. After shut in the pressure stabilized at 50 bar after 1 hour 50 bar at 07 00).

24-hour summary: POOH with 17 1/2 drilling BHA from TD m to surface. Overpulls up to 10-15 MT MT experienced at 1385 m MD. Worked string past obstructions with flow of 3000 LPM and rotation of 15-50 RPM. Worked area from 1385 m MD to 1357 m MD. Observed peaks of 20 KNM at 1370 m MD and 1381 m MD. Stopped rotation and circulation and pulled from 1385 m MD to 1357 m MD with no overpull. Racked back BHA in derrick due to high winds. Jetted BOP and wellhead. Retrieved nominal seat protector. Rigged up casing running equipment. Ran 13 3/8" casing to 40 m MD. Checked float.