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.