Hourly activities:
00:00 - 01:30: Broke connection above the cutter. Changed and adjusted knives to 12,25in size
01:30 - 02:30: M/u cutter BHA together w/ torque tool for spaceout verification. Remeasured BHA components and pups/dp below torque tool
02:30 - 03:00: RIH w/ cutter BHA. Engaged torque tool in tieback adapter, p/u 21. 44m up to position knives at cutting depth of 139,7m middle of tieback adapter)
03:00 - 04:15: Took parameters 300l/min 22bar, 400l/min 49bar, 500l/min 85bar. Cut tieback adapter at 139,7m w/ 300l/min 19bar, 80rpm 2-8knm. As pressure decreased, increased pump rate to 400l/min 7bar, 460l/min 5bar, 530l/min 2bar. This pressure drop indicated that knives fully retracted and tieback adapter cut
04:15 - 04:45: POOH w/ cutting BHA
04:45 - 05:30: L/d cutting BHA
05:30 - 05:45: P/u and m/u fishing BHA
05:45 - 06:00: RIH on 5,5in DP to 128 meter and latched on to 10 3/4in tieback fish
06:00 - 07:15: Attempted to pull up to 80t overpull, worked the string several times up/down. No success
07:15 - 07:30: POOH with spear BHA on 5,5in DP f/ 129m to 27m
07:30 - 07:45: R/b spear BHA
07:45 - 08:45: P/u torque tool and cutter assembly and 1x joint of 5,5in DP, m/u to TDS. Tested knives with 300 l/min, OK. Broke out TDS, continued m/u BHA to 29m
08:45 - 10:00: RIH w/ 5,5in DP and tagged top of tie back adapter with 2t at 124m. Filled string. Evaluated new cutting depth
10:00 - 10:45: Broke out TDS and POOH with cutter BHA Installed lifting nubbing and pulled out cutter BHA
10:45 - 12:00: Changed knives in cutter to 13,5in ones. M/u TDS and tested cutter knives w/ 310 l/min, OK
12:00 - 13:00: RIH w/ 5,5dp and tagged top of tie back adapter with 2t at 124m. Filled string and broke circulation w/ 310 l/min 19 bar
13:00 - 14:00: Positioned knives at 139. 7m. Increased flow rate to 500 l/min 82 bar, started rotating w/ 100rpm, started cutting tieback adapter w/ 1-9knm 60 bar, increased to 140rpm 1-7knm, 495 l/min 27bar, then 600l/min 17bar. Good indication of cut, lifted fish on knives, then pumps off
14:00 - 14:30: POOH w/ cutter BHA
14:30 - 15:15: L/d torque tool and cutter BHA
15:15 - 15:30: P/u spear BHA set spear in catch position. RIH to 26m
15:30 - 15:45: RIH w/ spear to 106m. M/u TDS, took up/down weights 73t/70t. Continued in hole and latched onto fish at 128. 5m, pulled free with 3t overpull
15:45 - 16:30: Broke-out TDS and POOH w/ spear BHA. Observed fish on spear. Released spear and l/d fish, r/b spear
16:30 - 16:45: Cleaned and cleared rig floor
16:45 - 17:00: Performed pre-job meeting to p/u milling BHA
17:00 - 17:45: Carried out PMS and dailys while waiting for crew change helicopters
17:45 - 19:00: P/u and m/u milling BHA RIH same to 98m
19:00 - 19:15: Performed pre-job meeting w/ oncoming crew
19:15 - 19:45: RIH w/ milling BHA from 98 to 135m
19:45 - 20:00: Took up/down weights 85t/82t, parameters 80rpm 1-5knm, 2000l/min 14bar
20:00 - 23:15: RIH and tagged tieback adapter cut at 139,7m, marked milling distance on pipe. P/u, started pumping and rotation 2000l/min 13bar 80rpm. RIH and started milling tieback adapter. Torque 2-7knm, wob 1t. Observed almost no vibration in the start and very noticeable vibration effects in the end of milling period. Totally milled ca 14cm down
23:15 - 00:00: Investigated water leak on TDS

24-hour summary: cut in the middle of tieback adapter attempted to fish top part of tieback adapter cut tieback adapter, second attempt fished top part of tieback adapter started milling tieback adapter