Table T1. Operations summary, Site C0003. (See table notes.)
| Hole C0003A |
| Latitude: 33°13.3982′N |
| Longitude: 136°42.1382′E |
| Seafloor (drill pipe measurement from rig floor, m): 2481.5 |
| Distance between rig floor and sea level (m): 28.5 |
| Water depth (drill pipe measurement from sea level, m): 2453 |
| Operation | Start | Depth (m LSF) |
Drilled (m LSF) |
Comments | ||
|---|---|---|---|---|---|---|
| Date (Oct 2007) |
Local time (h) |
|||||
| Top | Bottom | |||||
| Hole C0003A LWD hole | 18 | 2200 | 0 | 525.5 | 533.5 | 8-1/2 inch LWD (GVR-sonic-SVWD-MWD-APWD-ADN). |
| ROV survey | 20 | 1145 | ||||
| Tag seafloor | 20 | 1210 | ||||
| Spud-in | 20 | 1245 | ||||
| Drilled depth | 21 | 1200 | ||||
| Tools stuck and packed-off | 21 | 1000 | Packed off at 3015 m DRF after pipe connection at 1000 h. Reamed and worked string between 3015 and 3006 m. Stuck in hole at 3007 m DRF at 1345 h. Failed several attempts for torque up and jar down. Pumped Hi-Vis mud to clean. Backed off while trying to turn and move the pipe at 1445 h. | |||
| Fishing and cementing | 21 | 1545 | ||||
| Preparation | 21 | 1545 | Made up free-fall funnel, landed on seafloor, then pulled out drill string to surface and checked the break point of assembly. | |||
| 1st overshot fishing | 22 | 1405 | 8-1/8 inch overshot assembly was made up, run in, reentered, washed down, and reamed from 2707 to 2785 m DRF. Attempted 7 times between 0000 and 0745 h on 24 Oct and only one was successful but failed to pull up. Pulled out at 1415 h on 24 Oct. | |||
| 2nd overshot fishing | 24 | 1405 | 6-3/4 inch overshot assembly was made up and run again on 25 Oct. Reentry took 10 h and the overshot failed again to catch the stuck LWD assembly. Wireline was rigged up with a 7 m sinker bar for dummy run at 2215 h on 25 Oct. After failing to pass through 2780.5 m at 0145 h on 26 Oct, the dummy tool was retrieved. Sinker bar had unscrewed and dropped off. Overshot assembly was recovered back on deck at 0000 h on 27 Oct. | |||
| 3rd overshot fishing | 27 | 0000 | Made up 8-1/8 inch overshot assembly with 6-5/8 inch spiral grapple and reentered the hole at 0315 h on 28 Oct. Ran into 2774 m DRF and rigged up wireline assembly at 0600 h. Overshot latched the pipe after several attempts but failed to pass below 2788 m by wireline and rigged down. Overshot fishing continued until decision was made to pull out 1200 h of 29 Oct. | |||
| Plug and cementing | 29 | 1200 | Made up a cement stinger, run in and rigged up cement stand. Cement lines flushed at 0200 h on 30 Oct. First cement job was conducted at 0430 h and second cement job was done at 0730 h. After confirming cement return to the seabed by ROV, cementing assembly was pulled out and drill string was cleaned. | |||
Notes: LSF = LWD depth below seafloor. LWD = logging while drilling, GVR = geoVISION resistivity tool, sonic = sonic while drilling (sonicVISION), SVWD = seismicVISION while drilling, MWD = measurement while drilling, APWD = annular pressure while drilling, ADN = Azimuthal Density Neutron tool (adnVISION). ROV = remotely operated vehicle. DRF = drillers depth below rig floor.
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