Hourly activities:
00:00 - 01:30: Drilled 26" hole from 306 m to 318 m, 3650 l/min, 105 bar, 40 RPM, 5 KNM, 2 5 tons wob. Pumped hi-vis sweeps.
01:30 - 02:00: R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 276. 4 1. 41 316. 92
02:00 - 03:00: Drilled 26" hole from 318 m to 333 m, 3650 l/min, 105 bar, 40 RPM, 5 KNM, 2 5 tons wob. Pumped hi-vis sweeps.
03:00 - 03:30: R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 290. 2 1. 30 318. 66
03:30 - 04:30: Drilled 26" hole from 333 m to 346 m, 3760 l/min, 110 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
04:30 - 05:00: R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 305 1. 06 321. 43
05:00 - 06:00: Drilled 26" hole from 346 m to 359 m, 3760 l/min, 110 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
06:00 - 07:00: R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 317. 0 0. 98 327. 19
07:00 - 08:00: Drilled 26" hole from 359 m to 374 m, 3760 l/min, 110 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
08:00 - 08:30: R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 332. 0 1. 08 321. 81
08:30 - 09:30: Drilled 26" hole from 374 m to 387 m, 4400 l/min, 155 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
09:30 - 10:30: Attempted to take MWD survey, no-go. R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 344. 7 1. 07 325. 46
10:30 - 11:00: Drilled 26" hole from 387 m to 402 m, 4500 l/min, 155 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
11:00 - 12:30: Attempted to take MWD survey, no-go. R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 358. 2 1. 13 318. 40
12:30 - 13:00: Orient drilled 26" hole from 387 m to 402 m, 4500 l/min, 155 bar, 2 4 tons wob. Pumped hi-vis sweeps.
13:00 - 13:30: R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 371. 7 1. 16 320. 72
13:30 - 14:00: Orient drilled 26" hole from 414 m to 421 m, 4500 l/min, 155 bar, 2 4 tons wob. Started rotation, 40 RPM, 4 KNM and continued drilling 26" hole from 421 m to 428 m, 4500 l/min, 155 bar, 2 4 tons wob. Pumped hi-vis sweeps.
14:00 - 15:00: Attempted to take MWD survey, no-go. R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 385. 0 1. 40 317. 81
15:00 - 15:30: Drilled 26" hole from 428 m to 441 m, 3500 4500 l/min, 70 155 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
15:30 - 16:30: Attempted to take MWD survey, no-go. R/u wireline, RIH and took gyro survey m bit depth) survey station inclination azi 398. 2 1. 78 319. 73
16:30 - 17:00: Drilled 26" hole from 428 m to 441 m, 4500 l/min, 155 bar, 40 RPM, 5 KNM, 2 4 tons wob. Pumped hi-vis sweeps.
17:00 - 17:30: Attempted to take MWD survey, no-go. Detected unusual noise from crown block fast-line sheave.
17:30 - 21:30: Checked crown block fast-line sheave and found bearing ceased onto shaft. Evaluated situation and informed offshore and onshore managment. Prepared forward plan to POOH 26" BHA prior to working on fast-line sheave. Barriered off rig floor and cantelever. Meanwhile circulated well 1100 l/min, 8 bar, 20 RPM, 2 KNM. Attempted to apply lubricant to fast-line sheave.
21:30 - 22:30: Performed pre-job meeting held SJA on drill floor prior to POOH. Meanwhile circulated well 1100 l/min, 8 bar, 20 RPM, 2 KNM. Pumped hi-vis sweeps.
22:30 - 00:00: Prepared POOH from 453 m to surface. Installed grease pump in crown block. Transferred 1. 35 SG KCL mud to active. Rigged down wireline equipment. Meanwhile circulated well 1100 l/min, 8 bar, 20 RPM, 2 KNM. Pumped hi-vis sweeps.

24-hour summary: Oriented and drilled 26" hole from 347 m to 454 m. Recorded gyro surveys. Found out crown block fast-line sheave bearings had failed. Prepared to displace hole to 1. 35 SG KCL mud and POOH 26" BHA from 454 m.