Table T3. Hole U1301B final formation and casing depth measurements.
| Description | Official (final) depths (m) | |||
|---|---|---|---|---|
|
Below rig floor |
Below seafloor |
Into basement |
Below base of reentry cone |
|
| Formation data: |
|
|
|
|
| Seafloor | 2667.84 | — | — | –3.45 |
| Top of cuttings | 2666.80 | — | — | –4.49 |
| Basement | 2933.00 | 265.16 | — | 261.71 |
| Hole depth data: |
|
|
|
|
| 20 inch diameter hole | 2936.00 | 268.16 | 3.00 | 264.71 |
| 18½ inch diameter hole | 2944.00 | 276.16 | 11.00 | 272.71 |
| 14¾ inch diameter hole (TD) | 3018.00 | 350.16 | 85.00 | 346.71 |
| 9⅞ inch diameter drilled hole | 3019.00 | 351.16 | 86.00 | 347.71 |
| 9⅞ inch diameter cored hole (TD) | 3250.60 | 582.76 | 317.60 | 579.31 |
| Reentry cone installation data: |
|
|
|
|
| Top (rim) of reentry cone | 2668.84 | 1.00 | — | –2.45 |
| Mud skirt (base) | 2671.29 | 3.45 | — | 0.00 |
| Casing shoe data: |
|
|
|
|
| 20 inch casing shoe | 2710.36 | 42.52 | — | 39.07 |
| 16 inch casing shoe | 2938.77 | 270.93 | 5.77 | 267.48 |
| Bottom of 10¾ inch casing "gap" | 2920.17 | 252.33 | –12.83 | 248.88 |
| Top of 10¾ inch casing "gap" | 2926.00 | 258.16 | –7.00 | 254.71 |
| Original 10¾ inch casing shoe | 3013.91 | 346.07 | 80.91 | 342.62 |
| Final 10¾ inch casing shoe | 3019.00 | 351.16 | 86.00 | 347.71 |
| Estimated gap in 10¾ inch casing string | 5.83 |
|
|
|
Notes: Negative numbers represent distance above the base of the reentry cone. A 10¾ inch casing coupling backed off between joints number 8 and 9. Bottom of casing "gap" at 2926.0 mbrf documented by numerous tags; shoe depth was calculated from this. Top of 10¾ casing gap at 2920.2 mbrf calculated from casing tally. — = not applicable or meaningful.
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