Table T1. Operation and sampling summary, Expedition 335.
Run |
Maximum depth (mbsf) |
Cumulative pipe trip (km) |
Date (2011) |
Local start time (h) |
Duration (days) |
Tools |
Samples |
Comments |
|---|---|---|---|---|---|---|---|---|
| 1 | 925 | 9.1 | 19 Apr | 0115 | 2.60 | Tricone bit Smith 9-7/8 inch F9 | Work obstruction at ~922 mbsf | |
| 2 | 923 | 18.3 | 21 Apr | 1545 | 1.64 | Tricone bit Reed 9-7/8 inch, IADC Type 517; external junk baskets | Run02-EXJB | Work obstruction at ~922 mbsf |
| 3 | 922 | 27.4 | 23 Apr | 0700 | 0.93 | Used Reed tricone bit without jets | Cementing (5 bbl) | |
| 4 | 922 | 36.5 | 24 Apr | 0515 | 1.04 | Tricone bit 9-7/8 inch Atlas HP61 | Work obstruction at ~922 mbsf | |
| 5 | 922 | 45.7 | 25 Apr | 0615 | 0.90 | Used Reed tricone bit without jets | Cementing (50 bbl) | |
| 6 | 923 | 54.8 | 26 Apr | 0345 | 2.47 | Tricone bit 9-7/8 inch Atlas HP61; external junk baskets | Run06-EXJB | Work obstruction at ~922 mbsf |
| 7 | 1507.1 | 65.1 | 28 Apr | 1500 | 3.49 | Tricone bit Smith 9-7/8 inch | Work obstruction at ~922 mbsf; cleared on 29 April; hole open to bottom on 1 May, 0900 h | |
| 8 | 960.5 | 74.3 | 2 May | 0245 | 1.02 | Used Reed tricone bit without jets | Cementing the 920–940 mbsf trouble zone (60 bbl) | |
| 9 | 1507.1 | 84.7 | 3 May | 0315 | 1.94 | RCB assembly with RBI/9-7/8 inch RCB C-9 | Ghost Cores 1G–6G; wash Core 7W | Work obstruction at ~922 mbsf; cleared on 29 April; hole open to bottom on 1 May, 0900 h |
| 9 | 1516.5 | 5 May | 0145 | 0.48 | No liner, nonmagnetic core barrel | 235R; 236R | 0.33 m recovered, 7%; 0.61 m recovered, 13% | |
| 9 | 1520.2 | 5 May | 1320 | 1.68 | No liner, nonmagnetic core barrel | 237R; 238R | 0 m recovered; 0.20 m recovered, 10%; core catcher damaged, bit destroyed | |
| 10 | 1434 | 94.8 | 7 May | 0545 | 1.43 | 9 inch Bowen fishing magnet; external junk baskets | Run10-DC, EXJB, and FM | Lost circulation; 4 m of fine cuttings plugging inside bit sub and two junk baskets |
| 11 | 1520 | 105.1 | 8 May | 1600 | 1.84 | Tricone bit (Atlas 9-7/8 inch HP61); external junk baskets | Run11-DC and EXJB | Large cuttings in junk basket |
| 12 | 1518 | 115.5 | 10 May | 1215 | 1.74 | Bowen 9.75 inch reverse circulation junk basket | Run12-DC, EXJB, and RCJB | ~2.5 m of fill; BHA filled with ~50 m of fine cuttings, large rock samples (total = ~20 kg) in RCJB |
| 13 | 1518 | 125.8 | 12 May | 0600 | 1.28 | Bowen 9.75 inch reverse circulation junk basket | Run13-DC, EXJB, and RCJB | ~2 m of fill, approximately entire BHA filled with sand, large rock samples (largest = ~3.4 kg) in RCJB |
| 14 | 1520.2 | 136.1 | 13 May | 1245 | 1.34 | Homco 9.75 inch flow-through junk basket; bit sub junk basket and float | Run14-FTJB, EXJB, and BSJB | 2 cobbles (total = ~3.2 kg) in FTJB |
| 15 | 1520.2 | 146.5 | 14 May | 2100 | 1.80 | Smith hard formation 9-7/8 inch 7JS tricone bit; single junk basket | Run15-EXJB | Rock fragments and fine cuttings |
| 16 | 1520.2 | 156.8 | 16 May | 1615 | 1.76 | 9-7/8 inch Smith FH3VPS tricone | ||
| 17 | 1520.2 | 167.1 | 18 May | 1030 | 1.70 | 9-5/8 inch flat-bottomed mill; bit sub junk basket | Run17-BSJB | Rock fragments and fine cuttings |
| 18 | 1520.2 | 177.5 | 20 May | 3015 | 1.40 | 9 inch flat mill; bit sub junk basket | Run18-BSJB | Rock fragments and fine cuttings |
| 19 | 1520.2 | 187.8 | 21 May | 1245 | 1.22 | Reverse circulating junk basket; three external junk baskets (BSJB + 2 EXJB) | Run19-RCJB, BSJB, and EXJB | 4 large rocks in RCJB (total = ~8.9 kg; largest = ~3.9 kg); gravel-sized cuttings to small pebbles in EXJB and BSJB |
| 20 | 1520.2 | 198.1 | 22 May | 1800 | 1.46 | Reverse circulating junk basket; three external junk baskets (BSJB + 2 EXJB) | Run20-RCJB, BSJB, and EXJB | 3 rocks in RCJB (total = ~5.0 kg), 1 is gabbro (1.4 kg); gravel-sized cuttings to small pebbles in EXJB and BSJB |
| 21 | 1520.2 | 208.5 | 24 May | 0500 | 1.14 | Reverse circulating junk basket; three external junk baskets (BSJB + 2 EXJB) | Run21-RCJB, BSJB, and EXJB | 4 small cobbles in RCJB; gravel-sized cuttings to small pebbles in EXJB and BSJB |
| 22 | 1520.2 | 218.8 | 25 May | 0815 | 1.03 | 9 inch Bowen fishing magnet; three external junk baskets (BSJB + 2 EXJB) | Run22-BSJB and EXJB | Fishing magnet clear, very little metal debris; rock fragments and fine cuttings in EXJB and BSJB |
| 23 | 218 | 226.5 | 26 May | 0900 | 2.13 | Logging (triple combo, FMS, and UBI) | FMS-sonic stuck in logging bit; only triple combo run | |
| 24 | 1521.6 | 236.83 | 28 May | 1200 | 1.83 | Ulterra RCB-9 coring bit | 239R | 0.5 m recovered, 35.7%; Cementing bottom (15 bbl) and 910–940 mbsf zone (50 bbl) |
IADC = International Association of Drilling Contractors, EXJB = external junk basket, RCB = rotary core barrel, RBI = Rock Bit International, DC = drill collar, FM = fishing magnet, RCJB = reverse circulation junk basket, BHA = bottom-hole assembly, FTJB = flow-through junk basket, BSJB = bit sub junk basket, FMS = Formation MicroScanner, UBI = Ultrasonic Borehole Imager. This table is available in ASCII and in Microsoft Excel format (see 103_T01.XLS in CHAPTER_103 in TABLES in “Supplementary material”).
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