Close   |    Next

Table T1. Operations, Site M0059.

Core Coring
method 		Date
(2013) 		Time
(UTC) 		Depth (mbsf) Recovered
(m) 		Recovery
(%) 		Mud type Comments
Top Bottom
347-M0059A-
    13 Sep 1530           BHA in slips/running pipe; permit to work received and signed in Dog Shack; seabed template on seabed
1H PCS 13 Sep 1920 0.00 3.33 3.33 100 Water  
2H PCS 13 Sep 2020 3.33 6.90 3.30 92.44 Water Advanced 3.59 m in error; additional core due to expanding mud
3H PCS 13 Sep 2235 6.90 10.20 3.30 100 Water  
4H PCS 13 Sep 2250 10.20 13.50 3.30 100 Water  
5H PCS 14 Sep 0010 13.50 16.80 3.30 100 Water  
6H PCS 14 Sep 0205 16.80 20.10 3.30 100 Water  
7H PCS 14 Sep 0240 20.10 23.40 3.30 100 Water  
8H PCS 14 Sep 0320 23.40 26.70 3.30 100 Water  
9H PCS 14 Sep 0410 26.70 30.00 3.30 100 Water  
10H PCS 14 Sep 0520 30.00 33.30 3.30 100 Water Seal lost
11H PCS 14 Sep 0617 33.30 36.60 3.50 106.06 Water Pump refused to break shear pins, problems with pumps; retrieved PCS
    14 Sep 0730           Repaired mud pump
12H PCS 14 Sep 1235 36.60 39.90 3.41 103.33 Water Good fire: instant release of pressure
13H PCS 14 Sep 1300 39.90 43.20 3.30 100 Water
14H PCS 14 Sep 1345 43.20 46.50 3.49 105.76 Water Fired at 3–5 bar, seals damaged
15H PCS 14 Sep 1440 46.50 49.80 3.52 106.67 Water 60 bar, damaged seals
16H PCS 14 Sep 1515 49.80 53.10 3.25 98.48 Water 65 bar, damaged seals
17H PCS 14 Sep 1635 53.10 55.30 1.55 70.45 Water 50 bar
18H PCS 14 Sep 1750 55.30 58.60 3.22 97.58 Water 50 bar, damaged seals
19H PCS 14 Sep 1915 58.60 61.90 3.23 97.88 Water 60 bar, damaged seals
20H PCS 14 Sep 2015 61.90 65.20 3.38 102.42 Water 60 bar, damaged seals
21H PCS 14 Sep 2115 65.20 68.50 3.47 105.15 Water 1 seal damaged
22H PCS 14 Sep 2230 68.50 71.80 3.61 109.39 Water  
23H PCS 14 Sep 2315 71.80 75.10 3.30 100 Water 1 seal missing
24H PCS 15 Sep 0015 75.10 78.40 3.33 100.91 Water
25H PCS 15 Sep 0100 78.40 81.70 3.28 99.39 Water  
26H PCS 15 Sep 0145 81.70 83.20 1.47 98 Water Appeared to not fire at 80 bar but partial recovery
27H PCS 15 Sep 0255 83.20 83.20 Washing 0 Water Piston fired at 80 bar (single steel pin) collected washings of sand; lifted the string to release pressure
28X ECS 15 Sep 0550 83.20 86.70 1.00 28.57 GS550  
29X ECS 15 Sep 0650 86.70 90.20 0.00 0 GS550 No penetration below 3.1 mbsf; pulled barrel, returned top section; lower section lost from sheared spring spline
    15 Sep 0736            
    15 Sep 0800           2 attempts to recover lower section with magnet fishing tool without success
    15 Sep 0830           Considered overdrilling to hold barrel in BHA but unable to get back over the sheared pipe
    15 Sep 0900           Cleared deck to make room for pulling pipe
                  End of hole
347-M0059B-
    15 Sep 1330           Lowered template and running pipe; 1 metric ton weight of the template on the seabed
  NCA 15 Sep 1500 0.00 60.00 0.00 0 Water Open hole to 60 mbsf
1H PCS 15 Sep 1705 60.00 63.30 3.35 101.52 Water Piston fired at 70 bar, 2 seals lost
    15 Sep 1745         Water Corer hung in drill string; recovered to deck to find top seal stretched over sub, lower seal damaged; removed 4 pipes from string, as potential cause of seal damage; damage manifested in Hole M0059A at ~30 mbsf
    15 Sep 1820         Water Tripping 4 API; one pipe was two welded together with internal joint not welded correctly, forming a lip
    15 Sep 1910         Water Running pipe
    15 Sep 1955         Water Attempted piston core but could not pressurize
    15 Sep 2050         Water Piston core attempt became stuck in string close/at swivel
    15 Sep 2130         Water Tested piston core through mud valve adjacent and tested mud valve
2H PCS 15 Sep 2320 63.30 66.60 3.31 100.3 Water Replaced piston head seals
3H PCS 16 Sep 0025 66.60 69.90 3.58 108.48 Water
4H PCS 16 Sep 0125 69.90 73.20 3.55 107.58 Water  
5H PCS 16 Sep 0210 73.20 76.50 3.54 107.27 Water Seal missing, other broken
6H PCS 16 Sep 0320 76.50 79.80 3.57 108.18 Water High pressure to fire but full stroke
    16 Sep 0512           Unable to run corer into pipe; pipe, mud valve, and saver sub all OK; suspect template wires rubbing on moonpool
    16 Sep 0600           Diagnosed problem as mud valve not opening again
7H PCS 16 Sep 0620 79.80 83.10 3.07 93.03 Water High firing pressure >50 bar but full stroke achieved
8H PCS 16 Sep 0735 83.10 85.80 2.79 103.33 Guar Fired but did not fully bleed off, unlikely to have achieved full stroke
    16 Sep 0815           Unable to lower ECS through mud valve
9X ECS 16 Sep 0830 85.80 89.30 0.00 0 Guar No recovery: sand and silt in inverted catcher
10X ECS 16 Sep 0900 89.30 90.40 0.39 35.45 Guar Cobble jammed in the throat of the bit
  ECS 16 Sep 1050           No penetration; failed in attempt to recover core tube and overshot rope snapped
    16 Sep 1115           Round trip
    16 Sep 1200           BHA in slips; removed locking sub and ECS, found bit damaged and bottom extension tube compressed onto core tube; lifted BHA to view damage to the bit, very little
    16 Sep 1200           Prepared NRCB
    16 Sep 1509           Lowered BHA, run pipe
    16 Sep 1700           Mudline, reentered Hole M0059B; NCA dropped in and washed down to bottom of hole
    16 Sep 1830           Swapped out NCA for NRCB
11N NRCB 16 Sep 1840 90.40 91.40 0.00 0 Guar No recovery; no hard layer; added pipe
12N NRCB 16 Sep 1920 91.40 92.90 0.10 6.67 Guar Attempted to core 2 m with NRCB before assessing the next option
13H PCS 16 Sep 1955 92.90 93.00 0.12 120 Guar Several attempts to shear pins at high pressure without success; appears they sheared but no release because of high-strength material; sand jamming several PC sections causing difficulty in breaking tool down; still in till, so reverted to ECS with shoe to attempt penetration with recovery
14X ECS 16 Sep 2325 93.00 94.16 0.00 0 Guar Penetration stopped
15O NCA 17 Sep 0015 94.16 100.00 0.00 0 Guar Drilled down with insert bit
16O NCA 17 Sep 0155 100.00 101.37 0.00 0 Guar Drilled until became blocked off
    17 Sep 0300           Drilled down with insert bit (NCA)
    17 Sep 0310           Leak in mud swivel connection: removed drill pipe and lower rooster box; locking welds on pipe thread may have broken loose
17X ECS 17 Sep 0415 101.37 104.97 0.00 0 Guar Pulled NCA and replaced with PCD bit—NOT shoe
18X ECS 17 Sep 0523 104.97 107.28 0.00 0 Guar  
    17 Sep 0545         Guar Prepared and lowered PCS; wireline cable lays had bitten in from last pull and would not free from drum winch
    17 Sep 0620         Guar Freed wire lays from winch
19H PCS 17 Sep 0700 107.28 107.43 0.15 100 Guar PCS fired but no stroke; pulled string back to release pressure
20X ECS 17 Sep 0720 107.43 109.63 0.00 0 Guar Reasonable penetration, then stopped with no further downward movement
21X ECS 17 Sep 0800 109.63 111.03 0.00 0 Guar  
22P PCA 17 Sep 1050 111.03 111.03 0.00 0 Guar Attempted push sample; 1 metric ton weight with no penetration; shoe end was bent as if in contact with stone
23S HS 17 Sep 1120 111.03 111.05 0.02 100 Guar Attempted HS with limited success; 10 blows produced a very small sample
    17 Sep 1230           Following discussions with drillers, tripped pipe to replace main PCD bit with six-cone RR; continue to open hole with addition of a tricone insert RR bit
                  BHA in the slips
    17 Sep 1400           Removed PCD bit and replaced with six- cone RR; check length of tricone RR insert bit
24O NCA 17 Sep 1722 111.05 117.30 0.00 0 Guar Open hole; stopped when driller noted lithology change to softer material with small amount of mud pressure; swapped out NCA for push sampler
25P PCA 17 Sep 1900 117.30 117.92 0.62 100 Guar Recovered 62 cm of clay with small amount of worked material at the top
26O NCA 17 Sep 2000 117.92 169.03 0.00 0 Guar Returned NCA and continued to open hole
    17 Sep 2100 121.00       Guar No sample attempted, comment only: drilling as if still in clay at 121 mbsf, switching between clay and sands
    18 Sep 0250 158.00         Addition of pipe showed infill, so reaming to clear hole
    18 Sep 0630 163.00         Same material; switch to water to drill
    18 Sep 0650 165.00 167.00     Water Sudden, instant increase in drilling rate despite pulling back on WOB; stopped at 167 mbsf and conditioned hole
    18 Sep 0725 167.00         Added pipe and prepared ECS
27X ECS 18 Sep 0800 169.03 172.50 0.02 0.58 Guar Very soft, some torquing and harder bits in core run
28O NCA 18 Sep 0850 172.50 203.53 0.00 0 Guar Hard and torquing, possibly still in the till
    18 Sep 0905 177.50         Soft to hard, very “torquey,” like boulders in soft matrix (possibly chalk with flints)
    18 Sep 1130 181.55         Drillers comments: still in same material; pulled NCA and prepared to run HS but chalk and flints on tricone, so do not take a different sample type; prepared to run NCA again
29P PCA 18 Sep 1245 203.53 204.03 0.40 80 Guar Driller identified a change in parameters, loss of mud pressure, etc.; pulled NCA and prepared PCA
    18 Sep 1335           Overshot sleeve not correctly adjusted, caught in hoist rope; recovered and corrected to allow sample to be taken
30P PCA 18 Sep 1335 204.03 204.03 0.00 0 Guar Attempt made for push sample, but barrel may not have latched and string lowered to bottom of borehole but no penetration achieved; small scraping of chalk in shoe; Co-Chief called TD at 204.03 mbsf
    18 Sep 1355           Prepared drill floor for logging
    18 Sep 1925           Tripped pipe to 20 m from top of hole, but could not deploy logging tools below 70 mbsf; pulled tools out of hole and ran back in for a wiper trip before tripping pipe to 90 mbsf to log in two stages
    18 Sep 2100           Cleaned hole, tight at ~70 mbsf; ran pipe to 175 mbsf and flushed hole; pulled back to 90 mbsf, flushed in readiness for logging
    18 Sep 2210           Prepared drill floor for logging
    18 Sep 2300           Ran gamma and resistivity logging tool 185–90 mbsf
    19 Sep 0050           Lifted pipe back up 90–20 mbsf
    19 Sep 0200           Completed logging 73–20 mbsf
    19 Sep 0310           Pulled string
    19 Sep 0330           Lifted template
347-M0059C-
    19 Sep 0611           Template sank far into the seabed; checked transponder, rechecked and fitted, clamps checked: operational
    19 Sep 0620           Moonpool floor closed; lowered the seabed template to seabed
    19 Sep 0730           Discovered bend in first pipe above collars on attempting to enter the template clamps with the bit; tripped out pipes to remove this one from the string
    19 Sep 0818           Repositioned ship 5 m with the template off the seabed; attempted again to pass through clamps
1H PCS 19 Sep 0850 0.00 3.00 3.43 114.33 Seawater  
2H PCS 19 Sep 1018 3.00 6.30 3.50 106.06 Seawater  
3H PCS 19 Sep 1122 6.30 9.60 3.37 102.12 Seawater Failed to build pressure; pins sheared, presumably on the way down, but full recovery achieved in soft sediment
4H PCS 19 Sep 1210 9.60 12.90 3.59 108.79 Seawater 60 bar
5H PCS 19 Sep 1210 12.90 16.20 3.51 106.36 Seawater 60 bar
6H PCS 19 Sep 1403 16.20 19.50 3.39 102.73 Seawater 10 bar
7H PCS 19 Sep 1513 19.50 22.80 3.41 103.33 Seawater 10 bar
8H PCS 19 Sep 1613 22.80 26.10 3.44 104.24 Seawater 25 bar
9H PCS 19 Sep 1715 26.10 29.40 3.40 103.03 Seawater 35 bar
10H PCS 19 Sep 1818 29.40 32.70 3.48 105.45 Seawater 35 bar; apparent double fire; pressure rose to 35 bar, fell to ~25 bar, rose again to 35 bar, and fell back to zero
11H PCS 19 Sep 1909 32.70 36.00 3.47 105.15 Seawater 65 bar
12H PCS 19 Sep 1944 36.00 39.30 3.68 111.52 Seawater 75 bar
13H PCS 19 Sep 2039 39.30 42.60 3.45 104.55 Seawater 35 bar; pressure did not drop immediately after firing
14H PCS 19 Sep 2148 42.60 45.90 0.92 27.88 Seawater 20 bar
15H PCS 19 Sep 2258 43.50 46.80 3.31 100.3 Seawater  
16H PCS 20 Sep 0150 46.80 50.10 3.37 102.12 Seawater 50 bar; apparent double fire
17H PCS 20 Sep 0238 50.10 53.40 3.48 105.45 Seawater Into gray clay
18H PCS 20 Sep 0310 53.40 56.70 3.51 106.36 Seawater Apparent double fire (two 50 bar spikes)
19H PCS 20 Sep 0503 56.72 60.02 3.59 108.79 Seawater  
20H PCS 20 Sep 0545 60.02 63.32 3.50 106.06 Seawater One each steel and brass pin inserted to piston
    20 Sep 0635           Did not fire on 3 attempts; pulled back to remove steel pin but unable to do so; replaced entire inner rod assembly
    20 Sep 0730           Steel and brass pins: thought it fired but pressure did not release, so pulled back to bleed off but when recovered to the deck it was intact
21H PCS 20 Sep 0810 63.32 66.62 3.65 110.61 Seawater Set with two brass pins; fired and recovered a good core
22H PCS 20 Sep 0855 66.62 69.92 3.48 105.45 Seawater  
23H PCS 20 Sep 0940 69.92 73.22 3.42 103.64 Seawater Good recovery; seals broken
24H PCS 20 Sep 1038 73.22 76.52 3.66 110.91 Seawater 75 bar
25H PCS 20 Sep 1124 76.52 79.82 3.40 103.03 Seawater 90 bar
26H PCS 20 Sep 1155 79.92 82.32 2.40 100 Seawater Steel and brass pins fired at 100 bar; slightly sandy in shoe
27H PCS 20 Sep 1255 82.23 84.11 1.88 100 Seawater Sand
28S HS 20 Sep 1425 84.12 84.62 0.50 100   Ran NCA in alternative coring strategy of advancing 3 m before taking a hammer sample
29O NCA 20 Sep 1450 84.62 87.12 0.00 0 Guar All stop for 20 min to switch out hydraulic hose
30S HS 20 Sep 1535 87.12 87.62 0.50 100   HS: 50 blows
31O NCA 20 Sep 1610 87.62 90.12 0.00 0 Guar Washed down to 90.12 mbsf
32S HS 20 Sep 1710 90.12 90.13 0.01 100   HS: 50 blows; granite stone recovered
33O NCA 20 Sep 1730 90.62 93.12 0.00 0 Guar Washed down to 93.12 mbsf
34S HS 20 Sep 1930 93.12 93.52 0.40 100   HS: 50 blows; till recovered, gray clay with rare chalk pebbles
35O NCA 20 Sep 1945 93.12 96.12 0.00 0 Guar Washed down to 96.12 mbsf
36S HS 20 Sep 2045 96.12 96.32 0.20 100   HS: 50 blows; hard slightly clayey sand recovered
37O NCA 20 Sep 2130 96.12 99.12 0.00 0 Guar Washed down to 99.12 mbsf
38S HS 20 Sep 2250 99.12 99.62 0.50 100   HS: only needed 8 blows; soft gritty clay
39O NCA 20 Sep 2320 99.12 102.12 0.00 0 Guar Washed down to 102.12 mbsf
40S HS 21 Sep 0115 102.12 102.62 0.50 100   HS: needed just 15 blows for full penetration
41O NCA 21 Sep 0140 102.12 105.12 0.00 0 Guar Washed down to 105.12 mbsf
42S HS 21 Sep 0245 105.12 105.52 0.40 100   HS: needed 20 blows
43O NCA 21 Sep 0305 105.12 108.12 0.00 0 Guar Washed down to 108.12 mbsf
44S HS 21 Sep 0344 108.12 108.32 0.20 100    
45O NCA 21 Sep 0420 108.12 111.12 0.00 0 Guar  
46S HS 21 Sep 0512 111.12 111.22 0.10 100    
47O NCA 21 Sep 0535 111.12 114.12 0.00 0 Guar  
48S HS 21 Sep 0610 114.12 114.62 0.50 100    
49O NCA 21 Sep 0610 114.12 117.12 0.00 0 Guar  
50S HS 21 Sep 0730 117.12 117.22 0.10 100    
51O NCA 21 Sep 0900 117.12 120.12 0.00 0 Guar  
52S HS 21 Sep 0917 120.12 120.22 0.10 100    
53O NCA 21 Sep 0935 120.12 123.12 0.00 0 Guar  
54S HS 21 Sep 1035 123.12 123.15 0.03 100    
55O NCA 21 Sep 1055 123.12 124.62 0.00 0 Guar  
56S HS 21 Sep 1110 124.62 125.12 0.50 100    
57O NCA 21 Sep 1120 124.62 126.12 0.00 0 Guar  
58S HS 21 Sep 1210 126.12 126.47 0.35 100    
59O NCA 21 Sep 1230 126.12 127.62 0.00 0 Guar  
60S HS 21 Sep 1300 127.62 128.22 0.60 100    
61H PCS 21 Sep 1325 127.62 130.62 3.00 100 Guar 100 bar; no pressure drop, left for a minute before raising rooster box; sand; no advance between Runs 60 and 61
62H PCS 21 Sep 1400 130.62 131.72 0.95 86.36 Guar 60 bar
63H PCS 21 Sep 1520 131.72 134.72 3.02 100.67 Guar 80 bar; pump stalled
64H PCS 21 Sep 1630 134.72 135.20 0.24 50 Guar 90 bar; pressure did not fall off, so left for a minute before raising rooster box; sand
65O NCA 21 Sep 1740 134.96 135.72 0.00 0 Guar  
66H PCS 21 Sep 1745 135.72 138.72 2.81 93.67 Guar 90 bar; pressure did not fall off, so left for a minute before raising rooster box; sand
67H PCS 21 Sep 1835 138.72 138.97 0.20 80 Guar 90 bar; pressure did not fall off, so left until pressure released; suggestion is piston acting like a vibrocorer with the combined pressure and movement from the ship allowing penetration over time
68X ECS 21 Sep 1900 138.72 139.72 0.00 0 Guar Open hole using flush without insert bit
69H PCS 21 Sep 1920 139.72 141.70 2.00 101.01 Guar 100 bar; pressure did not release and was left for 3 min before lifting rooster box
70H PCS 21 Sep 2020 141.70 144.00 2.30 100 Guar 100 bar; pressure did not release and was left for 60 s before lifting rooster box
71H PCS 21 Sep 2132 144.00 144.50 0.05 10 Guar  
72S HS 21 Sep 2224 144.50 144.55 0.05 100 Guar  
73O NCA 21 Sep 2235 144.55 145.00 0.00 0   Open hole using flush without insert bit
74S HS 21 Sep 2245 145.00 145.20 0.20 100 Guar  
75O NCA 21 Sep 2315 145.20 146.00 0.00 0   Open hole with insert bit
76S HS 21 Sep 2355 146.00 146.10 0.10 100 Guar HS: 25 blows
77O NCA 22 Sep 0016 146.10 148.00 0.00 0   Open hole with insert bit
78S HS 22 Sep 0050 148.00 148.15 0.15 100 Guar HS: 15 blows
79O NCA 22 Sep 0145 148.15 153.00 0.00 0   Open hole with insert bit
80S HS 22 Sep 0220 153.00 153.10 0.10 100 Guar  
81O NCA 22 Sep 0240 153.10 154.00 0.00 0   Open hole with insert bit
82S HS 22 Sep 0313 154.00 154.05 0.05 100 Guar  
83O NCA 22 Sep 0340 154.00 158.00 0.00 0   Open hole with insert bit; last meter very hard, took 0.5 h to drill out
    22 Sep 0450           Flushing and reaming hole; bit had some hard dark gray clay on it
84S HS 22 Sep 0517 158.00 158.10 0.10 100 Guar Very stiff clay with stones recovered
    22 Sep 0535           End of hole
    22 Sep 0545           Prepared drill floor to pull string; pulled pipes; first collar in slips
    22 Sep 0728           BHA in slips
    22 Sep 0832           Template on the deck but still in guide
    22 Sep 0835           Removed transponder
347-M0059D-
    29 Oct 0340           Bridge stated we were on location
    29 Oct 0350           Lowered seabed frame
    29 Oct 0405           Started to add drill pipe to BHA and two drill collars
1H PCS 29 Oct 0435 0.00 1.80 2.54 141.11 Seawater Fired from 1.5 m above seabed
2H PCS 29 Oct 0455 1.80 5.10 3.5 106.06 Seawater  
3H PCS 29 Oct 0600 5.10 8.40 3.56 107.88 Seawater  
4H PCS 29 Oct 0635 8.40 11.70 3.56 107.88 Seawater  
5H PCS 29 Oct 0715 11.70 15.00 3.62 109.7 Seawater  
6H PCS 29 Oct 0745 15.00 18.30 3.5 106.06 Seawater  
7H PCS 29 Oct 0815 18.30 21.60 3.62 109.7 Seawater  
8H PCS 29 Oct 0855 21.60 24.90 3.55 107.58 Seawater  
9H PCS 29 Oct 0945 24.90 28.20 3.51 106.36 Seawater  
10H PCS 29 Oct 1020 28.20 31.50 3.33 100.91 Seawater  
11H PCS 29 Oct 1115 31.50 34.80 3.51 106.36 Seawater  
12H PCS 29 Oct 1155 34.80 38.10 3.47 105.15 Seawater  
13H PCS 29 Oct 1225 38.10 41.40 3.54 107.27 Seawater  
14H PCS 29 Oct 1310 41.40 44.70 3.52 106.67 Seawater  
15H PCS 29 Oct 1355 44.70 48.00 3.32 100.61 Seawater  
16H PCS 29 Oct 1430 48.00 51.30 3.40 103.03 Seawater Color changed in shoe from black/gray to light brown
17H PCS 29 Oct 1500 51.30 54.60 3.78 114.55 Seawater  
18H PCS 29 Oct 1545 54.60 57.90 3.45 104.55 Seawater  
19H PCS 29 Oct 1654 57.90 61.20 3.80 115.15 Seawater  
20H PCS 29 Oct 1739 61.20 64.50 3.67 111.21 Seawater  
21H PCS 29 Oct 1820 64.50 67.80 3.26 98.79 Seawater  
22H PCS 29 Oct 1900 67.80 71.10 3.70 112.12 Seawater  
23H PCS 29 Oct 1940 71.10 74.40 3.33 100.91 Seawater  
24H PCS 29 Oct 2025 74.40 77.70 3.47 105.15 Seawater  
25H PCS 29 Oct 2115 77.70 81.00 3.39 102.73 Seawater  
26H PCS 29 Oct 2150 81.00 84.30 3.42 103.64 Seawater  
27H PCS 29 Oct 2245 84.30 86.50 2.17 98.64 Seawater  
28S HS 29 Oct 2315 86.50 86.60 0.05 50 Seawater  
    29 Oct 2335           Started to trip string
    30 Oct 0010           Seabed frame lifted
347-M0059E-
    30 Oct 0020           On site
    30 Oct 0028           Lowered seabed frame
1H PCS 30 Oct 0050 0.00 3.30 3.5 106.06 Seawater 60 bar
2H PCS 30 Oct 0145 3.30 6.60 3.5 106.06 Seawater 40 bar
3H PCS 30 Oct 0232 6.60 9.90 3.49 105.76 Seawater 50 bar
4H PCS 30 Oct 0315 9.90 13.20 3.49 105.76 Seawater 50 bar
5H PCS 30 Oct 0400 13.20 16.50 3.45 104.55 Seawater 60 bar
6H PCS 30 Oct 0445 16.50 19.80 3.48 105.45 Seawater 50 bar
7H PCS 30 Oct 0605 19.80 23.10 3.34 101.21 Seawater  
8H PCS 30 Oct 0650 23.10 26.40 3.39 102.73 Seawater  
9H PCS 30 Oct 0735 26.40 29.70 3.37 102.12 Seawater  
10H PCS 30 Oct 0820 29.70 33.00 3.51 106.36 Seawater  
11H PCS 30 Oct 0915 33.00 36.30 3.45 104.55 Seawater  
12H PCS 30 Oct 1005 36.30 39.60 3.32 100.61 Seawater  
13H PCS 30 Oct 1055 39.60 42.90 3.47 105.15 Seawater  
14H PCS 30 Oct 1200 42.90 46.20 3.61 109.39 Seawater  
15H PCS 30 Oct 1250 46.20 49.50 3.66 110.91 Seawater  
16H PCS 30 Oct 1339 49.50 52.80 3.51 106.36 Seawater Core on deck 4.5 h after being collected because of broken seal (see below)
    30 Oct 1350           Wireline rope parted on retrieving PCS; first fishing attempt failed but overshot was clear; extended fishing tool fabricated to pick up at emergency overshot slot; second attempt picked up overshot and barrel; barrel assembly firmly jammed in BHA; back-hammering attempted to free it; after considerable time the assembly was dropped by the fishing tool and the string was tripped
    30 Oct 1630           Tripping pipe
    30 Oct 1700           First collar in slips
    30 Oct 1800           PCS in slips: still jammed; unscrewed core barrel from bottom and removed core
    30 Oct 1805           Core on deck
    30 Oct 1810           Backed off stabilizer sub to access PCS head and remove damaged seal (partially split and moved from bed, causing the jam)
    30 Oct 1820           Removed piston rod from BHA
    30 Oct 1830           Rebuilt BHA and ran pipe
17H PCS 30 Oct 1930 52.80 56.10 3.42 103.64 Seawater  
18H PCS 30 Oct 2020 56.10 59.40 3.62 109.7 Seawater  
19H PCS 30 Oct 2109 59.40 62.70 3.36 101.82 Seawater  
20H PCS 30 Oct 2205 62.70 66.00 3.54 107.27 Seawater  
21H PCS 30 Oct 2315 66.00 69.30 3.46 104.85 Seawater 50 bar
22H PCS 31 Oct 0005 69.30 72.60 3.45 104.55 Seawater 50 bar
23H PCS 31 Oct 0048 72.60 75.90 3.36 101.82 Seawater 50 bar
24H PCS 31 Oct 0136 75.90 79.20 3.57 108.18 Seawater 60 bar
25H PCS 31 Oct 0230 79.20 82.50 3.41 103.33 Seawater  
26H PCS 31 Oct 0325 82.50 85.80 3.62 109.7 Seawater 60 bar
27H PCS 31 Oct 0415 85.80 88.80 2.97 99 GS550 150 bar and no full stroke, as pressure remained high
28X ECS 31 Oct 0545 88.80 91.80 0.00 0 GS550  
29S HS 31 Oct 0710 91.80 92.80 0.10 10 GS550  
30X ECS 31 Oct 0745 92.80 93.80 0.17 17 GS550  
31S HS 31 Oct 0815 93.80 94.80 0.18 18 GS550  
32S HS 31 Oct 0900 94.80 95.80 0.15 15 GS550  
33X ECS 31 Oct 0930 95.80 96.80 0.3 30 GS550  
34X ECS 31 Oct 0958 96.80 97.80 0.03 3 GS550  
35X ECS 31 Oct 1035 97.80 98.80 0.64 64 GS550 Uncut “stub” of diamicton on end of bit; tool unlatched; checked bit was clear before sending next one down
36X ECS 31 Oct 1135 98.80 99.60 0.20 25 GS550 Cleaned ECS head, which had a lot of sand in the movable parts
37X ECS 31 Oct 1220 99.60 100.80 0.20 16.67 GS550 Sand in head again
    31 Oct 1305           Tool did not latch in; pressure in string up to 55 bar, indicating bit blocked; pulled tool to flush and clear
    31 Oct 1320           Flushing cleared bit, but when pumping stopped to RIH the hole collapsed; pulled back, thickened mud, tried to stabilize hole
    31 Oct 1340           Used some heavy mud (saturated brine) to stabilize the clay in the upper sections; pulled back a few pipes to clear clay bridge, stopping cuttings moving up the hole
    31 Oct 1410           Pumped back to 65 mbsf; still experiencing hole collapse through pipe (mud rising out of mud valve to 50 cm when pumping stops)
    31 Oct 1435           Allowed hole to settle and sand to stabilize; drilled back down to attempt to get to 100.8 mbsf
    31 Oct 1605           Unable to satisfactorily stabilize hole; end of hole called
    31 Oct 1700           Cleaned hole preparing to log
    31 Oct 1800           Set up logging
    31 Oct 1910           Completed first run to 70 mbsf
    31 Oct 2000           Completed second run to 60 mbsf
    31 Oct 2040           Completed third run to 60 mbsf
    31 Oct 2100           Logging derigged
    31 Oct 2110           Started lifting pipe
    31 Oct 2130           Lifted template

ECS = extended coring system, HS = hammer sampler, NCA = noncoring assembly, NRCB = nonrotating core barrel, PCA = push coring assembly, PCS = piston coring system. BHA = bottom-hole assembly, API = American Petroleum Institute size drill pipe, PC = piston core, PCD = polycrystalline diamond, RR = Rock Roller, WOB = weight on bit, TD = total depth, RIH = run in hole.

Close   |    Next   |    Top of page