Table T7. Coring bits used, Expedition 312.
| Bit number |
Manufacturer | Size (inch) |
Type | Serial number |
Number of cores |
Cored interval (m) |
Core recovered (m) |
Recovery (%) |
Coring time (h) |
Rate of penetration (m/h) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1256D-1 | RBI | 9⅞ | C-9 | CL-544 | 0 | 0.0 | 0.00 | — | 0 | — |
| SMITH | 9⅞ | F2 | YEO-106 | 0 | 0.0 | 0.00 | — | 0 | — | |
| 1256D-2 | RBI | 9⅞ | C-9 | CL-541 | 11 | 54.6 | 8.58 | 15.7 | 50.52 | 1.1 |
| 1256D-3 | RBI | 9⅞ | C-9 | CL-542 | 8 | 33.8 | 4.54 | 18.8 | 49.42 | 0.7 |
| 1256D-4 | RBI | 9⅞ | C-9 | CL-543 | 6 | 24.0 | 1.31 | 5.46 | 40.17 | 0.6 |
| 1256D-5 | RBI | 9⅞ | C-7 | CL-537 | 4 | 5.3 | 0.53 | 0.10 | 21.08 | 0.3 |
| 1256D-6 | RBI | 9⅞ | C-9 | CL-545 | 8 | 25.8 | 1.39 | 5.39 | 45.08 | 0.6 |
| 1256D-7 | RBI | 9⅞ | C-9 | CL-546 | 12 | 46.0 | 10.68 | 23.22 | 50.60 | 0.9 |
| 1256D-8 | RBI | 9⅞ | C-9 | CL-547 | 13 | 62.5 | 18.49 | 29.58 | 53.00 | 1.2 |
| Log bit | Logging | |||||||||
| Totals: | 252.0 | 45.52 | 0.77 | |||||||
Notes: RBI = Rock Bit International. — = not applicable.
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