Table T1. Expedition 301 operational steps with start and end times and dates.
| Operational task | Start | End | Task time | |||
|---|---|---|---|---|---|---|
| Date (2004) |
Local ship time (h) |
Date (2004) |
Local ship time (h) |
|||
| (h) | (days) | |||||
| End Expedition 301 port call in Astoria, Oregon | 27 Jun | 0600 | ||||
| Depart Astoria, Oregon, for Site U1301 | 27 Jun | 0600 | 27 Jun | 0830 | 2.50 | 0.1 |
| Cross Columbia River Bar | 27 Jun | 0830 | 27 Jun | 1030 | 2.00 | 0.1 |
| Transit ~172 nmi to Site U1301 (SR-1A) | 27 Jun | 1030 | 28 Jun | 0315 | 16.75 | 0.7 |
| Hole U1301A: | ||||||
| Jet-in test | 28 Jun | 0315 | 29 Jun | 0400 | 24.75 | 1.0 |
| Install reentry cone and 20 inch casing | 29 Jun | 0400 | 30 Jun | 0545 | 25.75 | 1.1 |
| Drill 20 inch hole in sediment with underreamer for 16 inch casing | 30 Jun | 0545 | 01 Jul | 1130 | 29.75 | 1.2 |
| Drill 20 inch hole in basement with bicenter bit | 01 Jul | 1130 | 02 Jul | 1345 | 26.25 | 1.1 |
| Install 16 inch casing | 02 Jul | 1345 | 03 Jul | 1230 | 22.75 | 0.9 |
| Drill 14¾ inch hole with tricone bit in basement for 10¾ inch casing | 03 Jul | 1230 | 06 Jul | 0400 | 63.50 | 2.6 |
| Install 10¾ inch casing | 06 Jul | 0400 | 08 Jul | 0800 | 52.00 | 2.2 |
| Offset ship 36 m N13°E to Hole U1301B | ||||||
| Hole U1301B: | ||||||
| Install reentry cone and 20 inch casing | 08 Jul | 0800 | 09 Jul | 0900 | 25.00 | 1.0 |
| Repair underreamer | 09 Jul | 0900 | 09 Jul | 1645 | 7.75 | 0.3 |
| Drill 20 inch hole 11 m into basement with 18½ inch bit and underreamer | 09 Jul | 1645 | 11 Jul | 0600 | 37.25 | 1.6 |
| Install 16 inch casing | 11 Jul | 0600 | 12 Jul | 0130 | 19.50 | 0.8 |
| Drill 14¾ inch hole with tricone bit in basement for 10¾ inch casing | 12 Jul | 0130 | 14 Jul | 0215 | 48.75 | 2.0 |
| Install 10¾ inch casing; unable to land, pull out of hole | 14 Jul | 0215 | 15 Jul | 0515 | 27.00 | 1.1 |
| Ream hole with 14¾ inch tricone bit | 15 Jul | 0515 | 16 Jul | 0500 | 23.75 | 1.0 |
| Install 10¾ inch casing | 16 Jul | 0500 | 17 Jul | 0045 | 19.75 | 0.8 |
| Equipment transfer by helicopter, 1100 h on 16 July | ||||||
| Transit 0.55 nmi to Site 1026 in DP mode (during pipe trip) | 17 Jul | 0045 | 17 Jul | 0045 | 0.00 | 0.0 |
| Hole 1026B: | ||||||
| RIH/Fish aluminum reentry funnel/POOH | 17 Jul | 0045 | 17 Jul | 1200 | 11.25 | 0.5 |
| Transit 0.55 nmi to Site U1301 (during pipe trip) | 17 Jul | 1200 | 17 Jul | 1200 | 0.00 | 0.0 |
| Hole U1301A: | ||||||
| Drill out cement, check and clean hole to total depth | 17 Jul | 1200 | 18 Jul | 0315 | 15.25 | 0.6 |
| Hydrologic (packer) testing | 18 Jul | 0315 | 19 Jul | 1000 | 30.75 | 1.3 |
| Install CORK and ROV platform | 19 Jul | 1000 | 21 Jul | 0230 | 40.50 | 1.7 |
| Offset ship 36 m back to Hole U1301B (during pipe trip) | ||||||
| Hole U1301B: | ||||||
| Drill out cement | 21 Jul | 0230 | 21 Jul | 1800 | 15.50 | 0.6 |
| RCB core to 582.8 mbsf | 21 Jul | 1800 | 31 Jul | 2245 | 244.75 | 10.2 |
| Wireline logging; four runs | 31 Jul | 2245 | 02 Aug | 2330 | 48.75 | 2.0 |
| Transit 0.55 nmi to Hole 1026B (during pipe trip) | ||||||
| Hole 1026B: | ||||||
| Recover CORK installed during Leg 168 | 02 Aug | 2330 | 03 Aug | 1500 | 15.50 | 0.6 |
| Install CORK (includes 15.75 h to fish obstruction in cone) | 03 Aug | 1500 | 05 Aug | 0415 | 37.25 | 1.6 |
| Deploy ROV platform | 05 Aug | 0415 | 05 Aug | 1615 | 12.00 | 0.5 |
| Transit 0.55 nmi to Hole U1301B (during pipe trip) | ||||||
| Hole U1301B: | ||||||
| Attempt to align and cement 10¾ inch casing | 05 Aug | 1615 | 06 Aug | 1700 | 24.75 | 1.0 |
| Offset ship 100 m north-northeast (19°) of Hole U1301B | ||||||
| Hole U1301C: | ||||||
| APC core to ~265 mbsf, conduct five temperature measurements | 06 Aug | 1700 | 08 Aug | 1545 | 46.75 | 1.9 |
| Offset ship back to Hole U1301B (during pipe trip) | ||||||
| Hole U1301B: | ||||||
| Open hole and check depth of hole | 08 Aug | 1545 | 09 Aug | 0730 | 15.75 | 0.7 |
| Hydrologic (packer) testing | 09 Aug | 0730 | 10 Aug | 2100 | 37.50 | 1.6 |
| Test CORK-II casing and spring centralizers across casing gap | 10 Aug | 2100 | 11 Aug | 1315 | 16.25 | 0.7 |
| Failed attempt to install CORK; 4½ casing breaks below CORK-II head | 11 Aug | 1315 | 13 Aug | 0600 | 40.75 | 1.7 |
| Visually inspect failed CORK-II | 13 Aug | 0600 | 13 Aug | 1545 | 9.75 | 0.4 |
| Remove (fish) failed 4½ inch casing from reentry cone | 13 Aug | 1545 | 14 Aug | 0600 | 14.25 | 0.6 |
| Check depth of hole with drill bit | 14 Aug | 0600 | 14 Aug | 1800 | 12.00 | 0.5 |
| Install CORK | 14 Aug | 1800 | 16 Aug | 1715 | 47.25 | 2.0 |
| Deploy ROV platform | 16 Aug | 1715 | 17 Aug | 0415 | 11.00 | 0.5 |
| Spot cement in reentry cone through ROV platform | 17 Aug | 0415 | 17 Aug | 1515 | 11.00 | 0.5 |
| Remove (fish) piece of failed 4½ inch casing adjacent to reentry cone | 17 Aug | 1515 | 17 Aug | 2245 | 7.50 | 0.3 |
| Conduct seafloor hazard survey surrounding Holes U1301A and U1301B | 17 Aug | 2245 | 18 Aug | 1030 | 11.75 | 0.5 |
| Hole U1301D: | ||||||
| APC core 120–180 mbsf and secure for transit to Astoria, Oregon | 18 Aug | 1030 | 19 Aug | 0600 | 19.50 | 0.8 |
| Transit ~179 nmi to Astoria, Oregon | 19 Aug | 0600 | 19 Aug | 2245 | 16.75 | 0.7 |
| Totals: | 1288.8 | 53.7 | ||||
Notes: Local ship time = UTC – 7. RIH = run in hole, POOH = pull out of hole. DP = dynamic positioning. ROV = remotely operated vehicle, CORK = Circulation Obviation Retrofit Kit, RCB = rotary core barrel, APC = advanced piston corer.