Table T2. Summary of operational depths, Hole U1362B. (See table note.)
| Location | Depth | Comments | ||
|---|---|---|---|---|
| mbrf | mbsf | msb | ||
| Seafloor depth | 2672.0 | 0.0 | –242.0 | |
| Basement depth | 2914.0 | 242.0 | 0.0 | Hard drilling, basalt chips recovered |
| 21-1/2 inch hole | 2915.5 | 243.7 | 1.5 | Underreamer slightly into basement |
| 18-1/2 inch hole | 2922.0 | 250.0 | 8.0 | Pilot bit below underreamer |
| 14-3/4 inch hole | 2954.0 | 282.0 | 40.0 | Tricone bit |
| 9-7/8 inch hole | 3031.0 | 359.0 | 117.0 | Tricone bit |
| 20 inch casing shoe | 2725.0 | 53.0 | –189.0 | Includes tidal correction |
| 16 inch casing shoe | 2922.0 | 242.0 | 0.0 | |
| 10-3/4 inch casing shoe | 2944.0 | 272.0 | 30.0 | |
| CORK BHA (4-1/2 inch casing) | 2979.9 | 311.0 | 69.0 | End of bullnose below perforated collars |
| Base of cement below 10-3/4 inch casing | 2954.0 | 282.0 | 40.0 | Broke through when drilling out cement |
| Fill tagged in base of hole | 3020.0 | 348.0 | 106.0 | After injection test |
| Upper CORK packer seat top | 2933.2 | 261.2 | 19.2 | Element top, shallow swellable packer set |
| Upper CORK packer seat base | 2943.1 | 271.1 | 29.1 | Element base, shallow inflatable packer |
Note: CORK = subseafloor borehole observatory, BHA = bottom-hole assembly.
Previous | Close | Next | Top of page