bengsoon/volve_alpaca huggingface dataset:
Hourly activities:
00:00 - 01:30: Pressure tested cement retainer against uap to 70 bar/10 mins, OK. Released running tool and stinged out of retainer. Broke circulation at 25-30 bar with cement unit.
01:30 - 03:00: POOH with 5 stands. M/u pulling tool. RIH and retrieved wear bushing. L/d same.
03:00 - 05:30: Ran in to retrieve seal assembly. Latched into same. Closed uap and pulled seal assembly free. No overpull. No gas or pressure below seal assembly. Circulated through BOP. Opened uap and pulled OOH with seal assembly. L/d seal assembly and pulling tool.
05:30 - 06:00: Ran in to 3522m. Hooked up cement hose and lined up to establish circulation behind casing.
06:00 - 10:00: M/u circ. Sub and cement hose. Pressure tested surface lines to 250 bar/5 mins. Broke circulation. Stinged into retainer and sat down 10 tons on same. Attempted to establish circulation behind casing, negative.
10:00 - 12:30: Disconnected cement hose. Pulled back to 3372m. Prepared for running seal assembly.
12:30 - 14:30: Waited on weather.
14:30 - 16:00: Attempted to run in with seal assembly. Hung up at 35m. POOH. Found seals damaged. L/d seal assembly and running tool.
16:00 - 20:30: Ran in to 3530m. Hooked up cement hose and pressure tested surface lines to 345 bar/5 mins. Pumped 1,0 m3 mixing water as spacer. Mixed and pumped 4,0 m3 1,9 SG cement. Pumped 0,5 m3 spacer. Displaced same with 24,0 m3 mud at 600 LPM. Stinged into retainer. Squeezed cement into formation by pumping 6,0 m3 mud at 400 LPM/160 bar.
20:30 - 20:31: Stinged out of retainer. Pumped 0,5 m3 mud. Pulled back to 3452m.
20:31 - 21:30: Circulated any excess cement beyond 3000m. Pumped 8,0 m3 2,0 SG hi-vis pill. Displaced same with 29,0 m3 mud.
21:30 - 22:00: Pulled back to 3270m.
22:00 - 23:00: Circulated out any excess pill.
23:00 - 23:30: Slugged pipe. POOH to 2985m.
23:30 - 00:00: Drive gear for jaw on upper racking arm worn out. Attempted repair, negative.

24-hour summary: Attempted circulation behind casing, NEG. Wow damaged seal assembly on way in. POOH w/same. Squeezed casing shoe pumped heavy hi-vis pill POOH. Delay due to damaged upper racking arm.
Hourly activities:
00:00 - 00:30: Cont. Attempts to repair jaw, negative. Rigged up to pull stands manually.
00:30 - 06:00: POOH to 750m. Pulled stands in derrick manually.
06:00 - 07:30: Cont. POOH. L/d cement stinger
07:30 - 08:00: Attempted to release jammed seal assembly from running tool, negative.
08:00 - 09:30: RIH with cement clean-out tool. Hung up at 34 m. Worked tool through restriction. Washed wellhead and POOH.
09:30 - 10:00: Cleaned rig floor.
10:00 - 14:00: M/u elastomeric seal assembly and running tool and RIH. Hung up at 34 m. Worked through restriction. Set seal assembly. Flushed lines. Pressure tested surface lines to 345 bar/5 mins. Pressure tested seal assembly to 345 bar/10 mins. Released running tool and POOH.
14:00 - 15:30: Set wear bushing.
15:30 - 17:00: Rigged up wireline. Prepared and armed guns.
17:00 - 18:00: Attempted to run in with guns, negative. Hung up at 34 m. POOH. Installed centralizer.
18:00 - 00:00: Ran in with perforating guns. Correlated and perforated 9 5/8" casing from 3260 to 3255,4m. POOH.

24-hour summary: POOH with cement stinger ran cement clean-out tool. Set/tested elastomeric seal assembly. Set wear bushing. Perforated casing at 3260m. Verified injectivity. RIH with 2. ND alpha cement retainer.
Hourly activities:
00:00 - 01:30: Cont. POOH with guns. All shots fired. R/d wireline.
01:30 - 02:00: Flushed k/c-lines. Verified open perforations by injecting mud with cement pump against shear ram.
02:00 - 06:00: M/u alpha cement retainer. Hung up at 34 m. Worked retainer through restriction. Ran in to 1700m. Rotated 1-2 revolutions to the left each 10 stands to prevent slips from setting prematurely. Running speed 90 sec/std.
06:00 - 09:00: Cont. RIH with alpha cement retainer.
09:00 - 10:00: Set packer at 3225m. Flushed surface lines and pressure tested retainer down annulus to 70 bar/10 mins.
10:00 - 10:30: Re-checked perforations by injecting 0,5 m3 mud.
10:30 - 13:00: Attempted to release running tool, negative. Increased overpull in steps up to 40 tons. Rotated string with overpull. While rotating, reduced overpull in steps until neutral and slacked down until weight down. Worked pipe up/down while rotating, came free with 20 t overpull. Pressure tested retainer to 95 bar/10 mins.
13:00 - 13:01: Stung into retainer and confirmed injectivity. Pulled out of retainer while pumping to verify proper functioning, OK.
13:01 - 17:00: Installed cement hose. Flushed/pressure tested surface lines to 345 bar/5 mins. Pumped 3,0 m3 unweighed spacer. Mixed and pumped 7,5 m3 1,9 SG cement slurry. Pumped 1,0 m3 unweighed spacer. Displaced same with 16,9 m3 1,55 bentonite mud. Stinged into retainer. Squeezed 5,0 m3 cement slurry by pumping 9,0 m3 bentonite mud.
17:00 - 18:00: Hesitation squeezed 1,0 m3 cement slurry. Stinged out of retainer. Pumped 0,5 m3 mud. Pulled back to 3210m.
18:00 - 21:00: Displaced hole to 1,55 bentonite mud.
21:00 - 21:30: R/d circulating equipment. R/u to l/d pipe
21:30 - 00:00: POOH. L/d DP.

24-hour summary: Set/tested cement retainer at 3225m worked running tool free squeezed 9 5/8" casing. Displaced to bentonite mud. POOH.
Hourly activities:
00:00 - 03:00: Cont. POOH. L/d 85 joints.
03:00 - 06:00: Cont. POOH with stinger to 200m.
06:00 - 06:30: Cont. POOH. L/d cement stinger.
06:30 - 07:30: Pressure tested 9 5/8" casing to 345 bar/15 mins.
07:30 - 10:00: M/u baker 2c-2p retrievable abandonment plug. Ran in hole and set plug at 205m. Pressure tested plug to 100 bar for 15 mins. Pulled back 3 m.
10:00 - 11:30: Displaced hole to inhibited sea water. L/d baker running tool.
11:30 - 12:30: Slipped drill line.
12:30 - 16:00: R/u to pull BOP. L/d diverter. Installed handling joint. Deballasted rig 10 ft. Unlatched BOP and pulled same above template.
16:00 - 17:30: Moved rig 25m off location
17:30 - 00:00: Re-ballasted rig to drilling draft. Disconnected rucker tensioners. Removed pod line saddles and k/c-lines. Pulled BOP to surface. De-ballasted rig 10 ft due to high seas. Landed BOP on carrier.

24-hour summary: Tested casing to 345 bar set/tested plug at 205m, displaced to corrosion inhibitor above plug pulled BOP prepared for running temporary abandonment cap
Hourly activities:
00:00 - 04:00: Secured BOP onto carrier. L/d 2 ea 50 ft riser joints.
04:00 - 05:00: Re-ballasted rig to drilling draft. R/d riser handling equipment. R/u pipe handling equipment.
05:00 - 05:30: Cleaned rig floor.
05:30 - 06:00: M/u running tool for temporary abandonment cap.
06:00 - 07:00: Made up temporary abandonment cap to running tool and ran in to 82m.
07:00 - 08:30: Moved rig over well
08:30 - 09:30: Installed cap on wellhead. Pumped stack-magic corrosion inhibitor. Released running tool, pulled back to 80m.
09:30 - 11:30: Pulled guide wire 3 and 4. Released guide wire 1, closed hatch with same. Pulled guide wire 1.
11:30 - 12:30: Pulled rig 25m off location.
12:30 - 16:00: Pulled out and laid down cap running tool. Laid down 11 joints of 6 1/2" drill collar, 1 jar and 9 joints of 6 5/8" heavy-weight drill pipe.
16:00 - 18:00: Backloaded petrofree mud.
18:00 - 00:00: Waited on weather for anchor handling

24-hour summary: Ran corrosion cap, pumped corrosion inhibited fluid pulled guide wires, closed hatch l/d DC'S and HWDP'S backloaded petrofree mud wow for anchor handling
Hourly activities:
00:00 - 06:00: Continued waiting on weather for anchor handling
06:00 - 21:00: Waited on weather for anchor handling
21:00 - 00:00: De-ballasted rig

24-hour summary: Wow for anchor handling. De-ballasted rig and started anchor handling.
Hourly activities:
00:00 - 01:30: Cont. De-ballasting rig.
01:30 - 06:00: Pulled anchors. Bolstered anchor no. 8, 5, 4 and 1. Connected towing gear to lady".
06:00 - 07:30: Pulled anchors. Blosterd anchor no. 2 and 6.
07:30 - 08:30: Had to stop anchor handling due to fauty tyristor in SCR. Changed same.
08:30 - 10:30: Pulled anchors. Blosterd anchor no. 3 and prepaired anchor no. 7 for drop at new location. Anchor no. 7 hung off at 10 25 hrs.

24-hour summary: Continued anchorhandling. Repaired faulty tyristor in SCR. Finished anchorhandling.
Hourly activities:
15:00 - 19:30: Rig in transit from 15/9-d3h to 15/9-19s with viking lady in towing briddle. Dropped anchor no 7 at 1955 hrs
19:30 - 00:00: Set anchors no 2, 6, 3, 1 and 5

24-hour summary: Rig in transit from 15/9-d3h to 15/9-19s set anchors ballasted rig
Hourly activities:
00:00 - 02:30: Set anchors no 8 and 4
02:30 - 06:00: Ballasted rig
06:00 - 07:00: Ballasted rig to drilling draft
07:00 - 11:00: Tension-tested anchors, rerun anchor no 7 and tension tested same to 160 MT
11:00 - 13:00: Positioned rig over slot 3, well 15/9-19s
13:00 - 20:00: Ran guideline and connected to hatch. Positioned rig and opened hatch. Establised guidelines, assisted with ROV.
20:00 - 21:30: Pulled rig 25 m off location
21:30 - 00:00: Repaired TDS

24-hour summary: Ballasted rig tested tenion on anchors, rerun anchor no 7 positioned rig opened hatch and ran guide line anchors repaired TDS
Hourly activities:
00:00 - 06:00: Cont reparing TDS
06:00 - 13:30: L/d 6 5/8" drillpipe
13:30 - 15:00: Performed torque reading check on TDS, tested torque against tong load cell
15:00 - 16:30: L/d remaining 6 5/8" drillpipe
16:30 - 00:00: P/u 5" drillpipe, racked back in derrick

24-hour summary: L/d 6 5/8" drillpipe tested TDS torque readings against tong load cell p/u 5" drillpipe
Hourly activities:
00:00 - 06:00: Continued p/u 5" drillpipe
06:00 - 09:30: Cont p/u 5" drillpipe, tot 201 jnts.
09:30 - 00:00: Waiting on weather

24-hour summary: P/u 5" drillpipe wow
Hourly activities:
00:00 - 06:00: Waiting on weather
06:00 - 00:00: Waited on weather

24-hour summary: Waited on weather
Hourly activities:
00:00 - 06:00: Waited on weather
06:00 - 08:00: Waited on weather
08:00 - 08:30: RIH with corrosion cap retrieving tool to 86 m
08:30 - 12:00: Pulled rig on location, positioned same. Entered corr cap w/ret tool, pulled cap free with 20 MT overpull. Pulled rig 25 m off location.
12:00 - 13:30: Pulled out with corrosion cap.
13:30 - 20:00: P/u and orientated thoj in BOP using crane
20:00 - 00:00: Prepared BOP for running. Installed VX-RING

24-hour summary: Wow pulled corr cap oriented thoj in BOP using deck crane r/u BOP and equip ran BOP and riser
Hourly activities:
00:00 - 06:00: Ran BOP stack on 2 ea 50 ft riser jnts. Press tested k/c lines to 345 bar/10 min. Cont RIH with BOP/RISER. Press tested k/c 345 bar/10 min
06:00 - 06:30: Repaired test plug for k/c lines
06:30 - 07:00: Press tested k/c lines to 345 bar/10 min.
07:00 - 14:00: P/u slip jnt and land jnt, h/u k/c lines to slip jnt. Installed sadles for pod hoses, installed riser tensioners. Deballasted rig 3 m. Attempted to press test k/c lines.
14:00 - 14:30: Changed o-ring on kill line goosneck, press tested same to 200 bar
14:30 - 16:00: Positioned rig above slot, ballasted to drilling draft
16:00 - 17:00: Landed BOP off in WH, closed connector. Performed overpull with 25 MT
17:00 - 19:30: L/d landing jnt, p/u and install diverter. H/u hydraulic hoses
19:30 - 20:30: RIH with test plug and installed same
20:30 - 21:30: Press tested k/c lines and wellhead conn 345 bar. Function tested BOP.
21:30 - 22:30: POOH, l/d test plug, function tested shear ram with accoustic
22:30 - 00:00: R/u and run kos thoj, adapter jnt and wor jnts

24-hour summary: Repaired test plug for k/c lines, press tested to 345 bar installed slip jnt, k/c lines riser tensioners deballasted rig, attem to press test k/c lines, repaird same and press test. Pos rig and land BOP, pull test BOP 25 MT RIH with test plug and press tested k/c lines, WH connector and function test BOP POOH with test plug, function tested shear ram with accoustic r/u and run thoj, adapter jnt and 3 ea wor, press every conn POOH, l/d on deck
Hourly activities:
00:00 - 04:00: Cont run wor. Press test every connection 345 bar run total thoj, adapter jnt and 3 ea wor
04:00 - 06:00: POOH with wor, adapter jnt and thoj. L/d same
06:00 - 06:30: Cont r/d kos wor equipment
06:30 - 08:00: Press tested TDS valves and kelly hoses to 345 bar
08:00 - 11:00: RIH and retrieved baker retrievable plug at 205 m POOH with plug and ret tool, unable to free plug from ret tool, l/d both.
11:00 - 18:00: M/u 8 1/2" BHA 19, initialized MWD memory and function tested same. RIH and tagged CMT at 3216 m
18:00 - 21:30: Displaced hole to 1,40 SG petrofree mud, used 50 m3 SW and 8 m3 hi-visc as spacer
21:30 - 00:00: Drilled CMT from 3216 and retainer at 3225 m, cont drilling CMT to 3254 m

24-hour summary: R/d kos wor equip press tested TDS retrieved baker ret plug at 205 m, POOH m/u 8 1/2" BHA and RIH to top CMT at 3216 m displaced well to 1,40 SG petrofree mud drilled CMT and retainer from 3216 to 3260 m washed/reamed to 3535 m, circ hole for even mudweight performed fit/casing press test to 62 bar, equal to 1,71 SG
Hourly activities:
00:00 - 01:00: Cont drilling CMT from 3254 to 3260 m
01:00 - 03:30: Washed and reamed from 3260 to retainer at 3535 m
03:30 - 05:00: Circulated well for even mudweight in/out 1,42 SG
05:00 - 06:00: Press tested surface lines/kill line to 100 bar closed annular and press tested 9 5/8" casing to 62 bar, equal to 1,71 SG
06:00 - 06:30: Press tested CSG to 62 bar, equal to 1,71 SG
06:30 - 13:30: Drilled retainer at 3535 m and CMT to 3480 m
13:30 - 14:00: Drilled 8 1/2" hole from 3580 to 3581 m
14:00 - 15:30: Circulated and conditioned mud
15:30 - 17:00: Performed fit equal to 1,71 SG mud
17:00 - 00:00: Drilled 8 1/2" hole from 3581 to 3595 m

24-hour summary: Press tested 9 5/8" CSG to 62 bar, equal to 1,71 SG drilled retainer/cmt/new formation to 3581 m circ/cond mud performed fit equal to 1,71 SG drilled 8 1/2" hole from 3581 to 3595 m POOH for bit change
Hourly activities:
00:00 - 01:30: Attempted to cont drilling 8 1/2" hole, no progress. Flowchecked well
01:30 - 06:00: POOH for bit change to 284 m
06:00 - 07:00: Cont. POOH. Broke bit and bit sub.
07:00 - 08:00: L/d MWD-TOOL. M/u new MWD-TOOL.
08:00 - 13:30: Re-built BHA. Function tested MWD-TOOL. RIH to 3576m. Broke circulation each 500m.
13:30 - 14:30: Logged with the new MWD-TOOL from 3576m to 3595m.
14:30 - 22:00: Drilled/surveyed 8 1/2" hole from 3595m to 3643m.
22:00 - 23:30: Circulated bu for samples.
23:30 - 00:00: Flow checked 15 mins. Slugged pipe.

24-hour summary: Cont. POOH, changed MWD. RIH, drilled 8 1/2" hole from 3595m to 3643m. Top heimdal at 3630m. POOH for coring.
Hourly activities:
00:00 - 06:00: POOH. Broke bit. L/d MWD and stabilizers.
06:00 - 08:00: M/u core barrel and core head.
08:00 - 14:00: P/u 2 each 6 1/2" drill collars. RIH with BHA no. 21 to 3641m.
14:00 - 15:30: Circulated bottoms up to check for trip gas, negative.
15:30 - 16:30: Spaced out for coring. Dropped ball, seated same.
16:30 - 18:00: Cut core no. 1 from 3643m to 3648m. Core jammed off.
18:00 - 23:30: POOH. Broke core head.
23:30 - 00:00: Recovered core.

24-hour summary: Cored from 3643m to 3648m. POOH. Recovered 4,7m core. M/u BHA no. 22. RIH.
Hourly activities:
00:00 - 01:30: Continued recovering core. Racked core barrel in derrick. Cleaned rig floor.
01:30 - 03:30: M/u BHA no. 22. P/u mud motor and tested same. P/u MWD-TOOL. Oriented nortrak.
03:30 - 06:00: RIH to 1157m. Filled pipe and broke circulation each 500m.
06:00 - 09:00: Continued RIH with BHA no. 22 to 3585m. Filled pipe and broke circ. Each 500m.
09:00 - 12:00: Reamed and re-logged with MWD from 3585m to 3648m.
12:00 - 00:00: Drilled/surveyed 8 1/2" hole from 3648m to 3749m steered from 3648m to 3662m, 3674-3691m, 3702-3716m, 3724-3730m, 3731-3740m and 3742-3748m.

24-hour summary: RIH with BHA no. 22. Drilled/surveyed 8 1/2" hole from 3648 to 38xxm
Hourly activities:
00:00 - 00:30: Circulated/rotated to clean hole.
00:30 - 06:00: Continued drilling/surveying 8 1/2" hole to 3797m steered from 3763 to 3767m and 3769m to 3779m.
06:00 - 17:00: Drilled/surveyed 8 1/2" hole from 3797m to 3873m steered from 3797m to 3799m and from 3815m to 3827m. Attempted steering at 3869m, negative as motor stalled out. Used 50 tons overpull to free pipe after attempting to steer.
17:00 - 18:30: Circulated to clean hole.
18:30 - 20:00: Wiper trip to 3546m. Rotated pipe in slips on first 8 connections due to tendencies of sticking. No tight hole.
20:00 - 21:00: Slipped and cut 32m drill line.
21:00 - 22:30: Ran in to 3873m, no fill.
22:30 - 00:00: Drilled/surveyed 8 1/2" hole from 3873m to 3877m. Steered from 3875m to 3876m.

24-hour summary: Drilled to 3873m. Steering impossible. Sticking tendencies. Circ. B/u. Wiper trip to shoe, no tight spots. Slip'n'cut. RIH, OK. Drilled to 3894m. Steering impossible.
Hourly activities:
00:00 - 06:00: Drilled/surveyed 8 1/2" hole from 3877m to 3894m. Attempted steering at 3877m, negative due to motor stalling out.
06:00 - 00:00: Drilled/surveyed 8 1/2" hole from 3894m to 3950m. No steering.

24-hour summary: Drilled/surveyed 8 1/2" hole to 3955m. Circ. B/u. POOH.
Hourly activities:
00:00 - 03:00: Cont. Rotation drilling/surveying to 3955m.
03:00 - 04:30: Circulated b/u and shakers clean.
04:30 - 06:00: Flow checked. Pumped slug. POOH for bit change to 3528m.
06:00 - 09:30: Cont. POOH to 1200m.
09:30 - 10:30: Found motor on upper racking arm loose. Repaired same.
10:30 - 13:30: Cont. POOH. Broke bit. L/d MWD tool, motor, stabilisers and x-overs
13:30 - 16:30: M/u BHA no. 23 and RIH to 800m. Tested MWD-TOOL. At 800m, got alarm on low oil pressure on top drive.
16:30 - 21:30: Took down oil pump assembly to repair same.
21:30 - 22:30: Function tested BOP on yellow pod. Tested acoustic system.
22:30 - 00:00: Continued repairing TDS changed out oil pump.

24-hour summary: POOH with steering assembly. RIH with rotary assembly to 800m. Repaired TDS. Cont. RIH.
Hourly activities:
00:00 - 02:00: Cont. Repairing TDS. Re-installed oil pump assembly.
02:00 - 02:30: Filled pipe. Broke circulation and circulated a riser volume.
02:30 - 06:00: Cont. RIH to 3028m. Filled pipe and broke circ. Each 500m.
06:00 - 07:00: Cont. RIH with BHA no. 23 to 3565m.
07:00 - 07:30: Circulated to condition mud
07:30 - 08:30: Cont. RIH to 3884m, took weight.
08:30 - 12:00: Washed/reamed tight hole from 3884m to 3955m.
12:00 - 13:30: Rotary drilled and surveyed 8 1/2" hole from 3955m to 3971m.
13:30 - 14:00: Re-logged with MWD-TOOL from 3941m to 3955m.
14:00 - 00:00: Continued drilling/surveying 8 1/2" hole from 3971m to 4083m.

24-hour summary: None
Hourly activities:
00:00 - 06:00: Cont. Drilling/surveying 8 1/2" hole to 4140m.
06:00 - 00:00: Continued drilling/surveying 8 1/2" hole from 4140m to 4298m. Flow checked at 4239m due to drilling break, negative.

24-hour summary: Drilled/surveyed 8 1/2" hole to 4328m circ. B/u for sample.
Hourly activities:
00:00 - 01:30: Cont. Drilling/surveying 8 1/2" hole to 4308m. Flow checked at 4303m and at 4308m due to drilling breaks, negative.
01:30 - 02:00: Circulated due to high ROP.
02:00 - 04:30: Drilled/surveyed 8 1/2" hole from 4308m to 4328m.
04:30 - 06:00: Circulated bottoms up for sample.
06:00 - 06:30: Circulated bottoms up for samples.
06:30 - 07:00: Flowchecked for 15 min,negative. Pumped slug.
07:00 - 09:00: POOH to shoe. Worked tight spot at 3662m with MAX 30 ton overpull.
09:00 - 09:30: Flow checked, negative.
09:30 - 11:00: POOH to 2173m.
11:00 - 11:30: Repaired upper racking arm.
11:30 - 13:00: Continued POOH to 700m.
13:00 - 14:00: Rapaired upper racking arm.
14:00 - 16:00: Continued POOH. Laid down monel,stabilizers and MWD tool.
16:00 - 17:00: Picked up cbbl and installed 27m aluminium inner barrel. Spaced out cbbl and made up corehead.
17:00 - 22:00: RIH with BHA no. 24 to 3550m. Broke circulation each 600m.
22:00 - 22:30: Circulated to condition mud.
22:30 - 00:00: Continued RIH from 3550m to 4298m.

24-hour summary: POOH with BHA no. 23. RIH with coring assembly. Cut core no. 2 from 4328m to 4338m.
Hourly activities:
00:00 - 01:00: Broke circulation. Washed/reamed to 4328m.
01:00 - 02:30: Circulated bottoms up.
02:30 - 03:00: Dropped ball, displaced and seated same.
03:00 - 06:00: Cut core no. 2 from 4328m to 4338m.
06:00 - 10:30: Continued cutting core no. 2 from 4338m to 4355m.
10:30 - 11:00: Circulated 10 mins. Flow checked 15 mins, negative. Pumped slug.
11:00 - 17:00: POOH to 9 5/8" casing shoe. Flow checked, negative. Continued POOH to 29m, flow checked at 500m, negative.
17:00 - 19:00: Prepared for recovering core. Recorded 650 ppm h2s gas from top of corebarrel. Sounded general alarm and ordered all essential personnel to port box girder forward. Equipped drill-floor personnel with breathing apparatus. Closed shear ram to monitor well on choke. Carried out h2s measurements on rig floor.
19:00 - 19:30: Held safety/pre-operation meeting with involved personnel.
19:30 - 20:30: Installed lift sub. Pulled out inner barrel, kept same hanging in tugger line for venting out h2s.
20:30 - 22:00: Ran back in with inner barrel. Drilled 6mm diameter vent holes each meter. Measured h2s levels while drilling. Pulled inner barrel out after drilling vent holes.
22:00 - 23:30: Kept inner barrel hanging in tugger line for venting while measuring h2s-levels. Allowed personnel to go back indoor.
23:30 - 00:00: Held safety meeting with involved personnel prior to l/d core barrels.

24-hour summary: Cut core no. 2 to 4355m, POOH. L/d core. Took extraordinary safety precautions due to h2s in core. M/u BHA no. 25 for cutting core no. 3.
Hourly activities:
00:00 - 02:30: L/d inner barrels. Secured area around barrels. Broke core head.
02:30 - 03:00: Opened choke. Circulated down kill line, up choke line through poorboy degasser.
03:00 - 04:00: Opened shear ram. Flow checked, negative. Circulated a riser volume down k/c-lines, no gas/h2s.
04:00 - 05:00: Verified rig floor/surroundings h2s-free. Blew rig air into/through relevant cavities to clear eventual h2s. Finished the use of breathing apparatus on the rig floor/shaker room.
05:00 - 06:00: Made up core barrel with 27m aluminium inner tubes. Spaced out inner barrel and made up core head.
06:00 - 11:00: RIH with core barrel to 3548m. Broke circulation each 600m.
11:00 - 12:00: Circulated to condition mud. Installed mud saver sub on drilling stand
12:00 - 14:00: Continued RIH to 4326m.
14:00 - 14:30: Reamed from 4326m to 4355m.
14:30 - 16:30: Circulated bottoms up.
16:30 - 17:00: Dropped ball. Displaced and seated same. Took s. C. R.
17:00 - 22:00: Cut core no. 3 from 4355m to 4383m.
22:00 - 00:00: Circulated 15 minutes. Flow checked, negative. Slugged pipe. POOH with core barrel to 4134m.

24-hour summary: RIH with core barrel. Cut core no. 3 from 4355m to 4383m. POOH with core barrel.