Table T13. Chronology of logging operations in Hole 1256D during Expedition 335.
Activity |
Date |
Time (h) |
Tool depth (mbrf) |
Comments |
|---|---|---|---|---|
| Rig floor preparation | 26 May | 2000 | ||
| Run 1: triple combo | ||||
| Start tool string rig up | 2030 | |||
| Tool string check | 2200 | |||
| RIH | 2250 | 0 | ||
| Start downlog | 27 May | 0050 | 3800 | |
| Tool string at end of pipe | 0055 | 3865 | ||
| WHC testing | 0105 | 4000 | Heave was 1–2 m peak to peak; chosen configuration reduced tool motion by 50% | |
| Resume downlog | 0150 | 4000 | ||
| End downlog | 0245 | 5100 | Downlog interrupted to fully calibrate resistivity tool (HRLA) to ambient temperature | |
| Reach total depth | 0255 | 5165 | ||
| Begin first pass up | 0300 | 5165 | Problem opening caliper; decided not to run repeat to avoid trouble | |
| Speed up | 0405 | 4850 | Priority was lower ~300 m; continue mostly for caliper | |
| Turn off WHC | 0455 | 3950 | ||
| Pull into pipe | 0505 | 3864 | ||
| End first pass up | 0505 | |||
| Tools out; start rig down | 0700 | |||
| Tools rigged down | 0900 | Bowsprings of upper centralizer appear worn out and need to be replaced | ||
| Run 2: FMS-sonic | ||||
| Start tool string rig up | 0915 | Upper centralizer bowsprings replaced while rigging up | ||
| Tool string check | 1020 | |||
| RIH | 1050 | 0 | ||
| Tool string at end of pipe | 1240 | 3865 | ||
| Pull tool to surface | 1250 | 3885 | Could not pass below 3885 mbrf; assumed trouble with new springs | |
| Tool string at surface | 1410 | 0 | ||
| RIH | 1455 | 0 | Inspection showed no damage; assumed springs too stiff and try again | |
| Tool string at end of pipe | 1625 | 3865 | ||
| Tool declared stuck | 1800 | 3885 | Tried for >1 h to move, pump… | |
| Tool recovery | ||||
| Drop Kinley crimper | 2140 | Based on depth, count 1 h to work tool down | ||
| Drop Kinley hammer | 2240 | 2300 h, lost connection with cable head | ||
| Drop Kinley cutter | 28 May | 0015 | ||
| Drop Kinley hammer | 0120 | 0140 h, wireline cut | ||
| Wireline on deck | 0330 | |||
| Tool string at surface | 0940 | DSI receiver array sticking out of bit | ||
| All tools rigged down | 1130 | |||
RIH = run into hole, WHC = wireline heave compensator, HRLA = High-Resolution Laterolog Array, FMS = Formation MicroScanner, DSI = Dipole Sonic Imager. This table is available in ASCII and in Microsoft Excel format (see 103_T13.XLS in CHAPTER_103 in TABLES in “Supplementary material”).
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