Hourly activities:
00:00 - 01:00: Discussed situation. Decided to do pressure test in steps to identify the onset of the leakage. Fitted b-annulus with pressure gauge.
01:00 - 02:00: Pressured up well in 50 bar increments 50 bar 415 liter presssure drop 0,97 bar 5 min 100 bar 775 liter pressure drop 0,8 bar 5 min 150 bar 1099 liter pressure drop 1,8 bar 5 min 200 bar 1451 liter pressure drop 5,3 bar 5 min corresponding to a leakage rate of 7 l/min.
02:00 - 02:30: Closed b-annulus valves. Observed wrong placement of pressure gauge and unsuited scale on same. Bled back pressure to 150 bar. Changed pressure gauge. Pressure dropped from 150 bar to 142 bar over 30 min l/min) while working on annulus. When opening inner b-annulus valve a pressure of 12 bar could be observed on the pressure gauge immediately.
02:30 - 03:15: Pressured up well to 200 bar and observed annulus pressure increase to 25 bar. Pressure fell on well and increased on annulus 5 min well 2,4 bar drop annulus 3 bar cummulative increase 10 min well 4,6 bar drop annulus 6 bar cummulative increase 15 min well 6,4 bar drop annulus 9 bar cummulative increase 20 min well 7,5 bar drop annulus 11 bar cummulative increase indication of leakage from tie-back casing to b-annulus confirmed. Leakage rate with closed annulus at approx 200 bar 2,5 l/min.
03:15 - 03:30: Bled back pressure on casing and b-annulus.
03:30 - 04:00: Prepared for testing BOP. Picked up BOP test plug and RIH with same. Set test plug in surface wellhead.
04:00 - 06:00: Tested 18 3/4" surface BOP according to m rsk procedure.
06:00 - 10:30: Tested 18 3/4" surface BOP.
10:30 - 10:45: POOH with BOP test plug and laid down same.
10:45 - 12:30: Discussed further actions with town. Meanwhile picked up and made up 10 3/4" cup tester.
12:30 - 13:00: Held toolbox talk prior to RIH with 10 3/4" cup tester.
13:00 - 13:15: RIH with 10 3/4" cup tester on 5 1/2" DP to 30,5 m MD. Closed UPR and verified lineup.
13:15 - 13:45: Pressure tested ash and casing hanger against 10 3/4" cup tester. Stepped up pressure in 50 bar increments from 100 bar and held each step for 5 min. Obtained good test at 345 bar. Pumped and bled back 79 l.
13:45 - 14:00: RIH with 10 3/4" cup tester on 5 1/2" DP from 30,5 m to 132 m MD. Closed UPR.
14:00 - 14:45: Pressure tested upper tie-back string against 10 3/4" cup tester. Stepped up pressure in 50 bar increments from 100 bar and held each step for 5 min. Obtained good test at to 345 bar. Pumped and bled back 172 liter.
14:45 - 15:00: RIH with 10 3/4" cup tester on 5 1/2" DP from 132 m to 150 m MD. Closed UPR.
15:00 - 15:45: Pressure tested tie-back adaptor against 10 3/4" cup tester. Stepped up pressure in 50 bar increments from 100 bar and held each step for 5 min. Obtained good tests at 345 bar. Entire upper tie-back string tested to 345 bar 10 min OK. Pumped and bled back 183 liter.
15:45 - 16:15: POOH with 10 3/4" cup tester on 5 1/2" DP. Broke out and laid down cup tester.
16:15 - 16:45: Closed shear rams and performed fingerprinting of trip tank added 20 l water above shear ram. Observed 20 l increase added 10 l water above shear ram. Observed 10 l increase
16:45 - 17:00: Lined up to pump down well and re-test the complete tie-back string.
17:00 - 18:15: Pressured up well to 101 bar at 100 LPM. Pumped 712 liter. Dropped from 101,6 bar to 100,7 bar in 5 min OK. Pressured further up to 200 bar at 100 LPM. Total pumped 1410 liter. Dropped from 200 bar to 195,6 bar in 5 min. Leaking at approx 6 l/min. Pressured further up to 250 bar. Total pumped 1806 liter. Pressure drop 4 bar/5min. Pressured further up to 300 bar. Total pumped 2184 liter. Pressure drop 4 bar/5 min. Measured leakage rate of 4 l/min on b-annulus. Pressured further up to 346 bar. Pressure drop 0,5 bar/min. Measured leakage rate of 4 l/min on b-annulus.
18:15 - 20:30: Pressured up well to 345 bar every 15 min. Pressure dropped 0,5 bar/min. Measured a steady leakage rate of 4 l/min on b-annulus. Observed increase in leakage rate of approx 12 l/min each time the well was pressurised back to 345 bar. No significant change in leakage rates could be observed. Bled off pressure on well.
20:30 - 00:00: Picked up and RIH with nominal bowl protector at 20,8 m MD. Set bowl protector and pulled stand.

24-hour summary: Tested BOP. Pulled test plug. RIH with cup tester and tested upper tie-back string. Fingerprinted trip tanks. Leak tested tie-back and recorded leakage rates. Set nominal bowl protector. Waited on RTTS to arrive on supply boat.