Hourly activities:
00:00 - 00:30: Broke off swedge on TDS. Held toolbox talk prior to continue pulling cleaning string.
00:30 - 01:30: POOH with cleaning assemblies on 5 1/2" DP from 2175 m to 1870 m MD. Used manual slips.
01:30 - 02:30: Held toolbox talk. Removed bowl and masterbushing. Inserted PS-30 slips dressed for 5" drillpipe. Attempted to run HTS to drillfloor, no-go due to lack of calibration. Broke out and laid down cleaning assy with 10 3/4" scraper/magnet on deck. Observed swarf on magnet. Broke out singel and laid down on drillfloor.
02:30 - 03:00: Calibrated HTS after ESD shut down.
03:00 - 06:00: POOH with cleaning assemblies on 5" DP from 1870 m to 735 m MD.
06:00 - 07:00: POOH with cleaning assemblies on 5 1/2" DP from 735 m to 440 m MD.
07:00 - 07:15: Held toolbox talk prior to removing PS-30 slips. Observed falling object from derrick when attempting to lift out slips. Shackle and tag fell down on drillers cabin and deflected to drillfloor. Halted operation for investigation and derrick inspection.
07:15 - 08:00: Inspectred crown and TDS. Found source of shackle and tag to be from swivel between chain and wire on tugger.
08:00 - 08:15: Removed PS-30 slips from rotary and inserted master bushing.
08:15 - 09:00: Racked back last stand and 5" drillpipe. Laid out 9 5/8" scraper assy and 7" top dress/polish mill. Observed swarf on magnet. Inspected top dress mill OK. Found piece of metal jammed in polish mill.
09:00 - 09:45: Held toolbox talk prior to changing handling gear. Changed from 5" to 3 1/2" handing equipment. Inserted PS-21 dressed for 3 1/2" pipe in rotary.
09:45 - 15:00: POOH with cleaning assembly on 3 1/2" DP. Broke out and laid down 3 1/2" singles. Had problems to unlatch from pipe due to overgauge pipe close to couplings.
15:00 - 15:15: Laid out 7" scraper assembly.
15:15 - 16:30: Held toolbox talk. Picked up vetco bowl protector retrieval tool and RIH with same. Closed annular and flushed choke and kill line and manifolds from SW to 1,03 packer fluid at 1500 LPM.
16:30 - 17:00: RIH with retrieval tool and latched bowl protector at 20,1 m MD. POOH with tool and racked back stand.
17:00 - 17:15: Held toolbox talk prior to setting 10 3/4" MS-SEAL.
17:15 - 18:30: Made up seal assembly to running tool. Made up control lines to running tools.
18:30 - 19:30: Ran MS-SEAL running tool and strapped control line to pipe. Landed MS seal over 10 3/4" hanger at 20,8 m MD. Pressured up lock ring energizing line to 1500 psi and locked tool to WH. Took 7 MT overpull and verified tool set. Pressured up thorugh MS seal setting line to 4300 psi. Observed movement of string. Bled off pressure on control lines.
19:30 - 20:15: Pressure tested MS seal through test ports 3 and 4 on wellhead to 345 bar/10 min OK.
20:15 - 21:00: Released MS setting tool with 5 turns clockwise rotations. POOH with MS seal setting tool. Laid out tool and cleared rigfloor.
21:00 - 22:15: Held toolbox talk prior to leak testing surface tie back. Emptied SW on cement unit and filled tanks with drillwater. Verified b-annulus valves and test ports open. Lined up from cement unit to pump in kill line on BOP underneath shear ram. Pressurised line to 10 bar and opened HCR on BOP to verify line up. Closed shear ram.
22:15 - 23:15: Performed low pressure test of surface tie-back to 30 bar. Pressure dropped from 30,8 bar to 30,6 bar over 5 min OK. Volume pumped 245 liter. Pressured up from 30 bar to 345 bar at 200 LPM. Total volume pumped 2408 liter. Observed pressure decline from 345 to 312 bar over 10 mimutes indicating a leakage rate of 21 l/min. Observed annulus which continued to flow after pressurising finished. Checked for leaks accross hcrs and shear ram none observed. No increase in trip tank. Bled back pressure to zero. Recovered 2058 liter bled back volume. Checked pressure curve and found possible/neglible deflection around 300 bar.
23:15 - 00:00: Discussed situation. Meanwhile leak tested surface line to BOP to 345 bar 10 min OK.

24-hour summary: POOH with cleaning string. Broke out and laid down 3 1/2" singles. Flushed c/k lines and manifold. Pulled bowl protector. Set 10 3/4" MS seal and tested same. Tested tie-back casing negative observed excessive pressure drop. Troubleshot situation. Leak tested line up OK. Pressurised well in stepwise manner and verified leak in tie-back string at around 200 bar. Started pressure test of 18 3/4" surface BOP.