Hourly activities:
00:00 - 00:30: POOH w/ guns from 147m to surface
00:30 - 00:45: L/d perforation guns BHA. All shots fired
00:45 - 01:00: Performed pre-job meeting to p/u cutter BHA
01:00 - 01:15: P/u and m/u cutter BHA
01:15 - 01:30: Removed master bushing and installed ps21
01:30 - 03:15: RIH w/ cutter BHA on 5,5in DP from 9,2m to 892m. Average running speed 510 m/hour. Filled pipe at 1330l/min, 3 bar
03:15 - 04:15: M/u TDS. Positioned cutters to cutting depth of 887m. Up/down weights 97t/90t, took parameters 75rpm 4-7knm, 300l/min 18bar, 400l/min 35bar, 500l/min 61bar. Cut CSG at 887m w/ 300l/min 21bar, 80rpm 8-12knm. Measured gap of more than 2. 7m
04:15 - 05:30: Flowchecked well. Observed instant gain of 300l, then loss of 3m3/hour. Then losses went to 0. Observed bubbling inside drill string and in the riser, smell of gas. M/u TDS to string and observed increase in trip tank
05:30 - 07:00: Closed UPR and started to circulate via fully open rig choke, performed 1x full circulation at 600-1000l/min MAX 6bar. Stopped pump and monitor via sample line. No flow
07:00 - 07:15: Opened UPR line up trip tank and flow checked
07:15 - 08:30: POOH w/ cutting BHA on 5,5in DP from 887 m to 6 m Avg. Tripping speed 705 m/hr.
08:30 - 08:45: Removed ps21 and installed master bushing
08:45 - 09:15: L/d cutting BHA. Cleaned and cleared rig floor
09:15 - 09:30: Performed pre-job meeting to m/u LH landing string for torque tool
09:30 - 10:30: P/u 1x joint of 5,5in LH DP, m/u to x-over and 1x pup joint, l/d same onto HTS. P/u and m/u tieback adapter torque tool to LH DP, RIH to 140m
10:30 - 10:45: P/u LH DP with x-over and pup joint, m/u TDS, engaged to tieback adapter. Applied 30 KNM clockwise torque to string and released brake in an attempt to shock tieback adapter free. No success
10:45 - 11:00: Performed pre-job meeting to use rig tongs
11:00 - 11:45: Applied 25knm counterclockwise torque with TDS and applied brake. Latched onto pipe with rig tong and pulled to MAX 50knm, observed connection above x-over broke out
11:45 - 12:00: Performed pre-job meeting w/ oncoming crew
12:00 - 12:15: Broke out TDS from pup joint and layed out joint, x-over and pup onto HTS
12:15 - 12:30: Evaluated situation. Meanwhile cleaned and cleared drill floor
12:30 - 13:30: Broke out pup joint from x-over, cleaned threads and m/u dry back to x-over to 67 KNM
13:30 - 14:00: P/u joint, x-over and pup joint and m/u same to string at well center
14:00 - 15:45: M/u TDS and trapped 25knm in string, latched rig tong and pulled to 42knm then slowly increased to 52knm
15:45 - 16:00: Performed pre-job meeting for changes in the plan
16:00 - 20:00: Attached ropes to rig tong, trapped 26knm with TDS. Pulled w/ rig tong up to 75knm on the string. Tieback adapter did not release. Meanwhile discussed with onshore organization way forward
20:00 - 20:30: POOH tieback adapter torque tool from 140 meter to surface. L/d same
20:30 - 21:45: Discussed way forward. Meanwhile performed drops check on TDS and serviced same. Troubleshoot on XP pilot pressure on BX elevator.
21:45 - 22:15: Started preparing milling BHA. Meanwhile continued to troubleshoot on XP pilot pressure on BX-ELEVATOR
22:15 - 23:30: M/u milling BHA. L/d same
23:30 - 23:45: P/u cutter assembly
23:45 - 00:00: Performed pre-job meeting for change in plans

24-hour summary: POOH w/ guns cut 10 3/4in CSG at 887m attempted to release tieback adapter w/ left hand string. No success p/u cutter BHA