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Table T2. Chronology of logging operations in Hole U1309D during Expedition 340T.

Operation Date
(Feb 2012)
Time
(ship
local)
Depth
(mbrf)
Comments
Run 1: triple combo tool string
Rig floor preparation 21 1440    
Tool string rig up 21 1510    
Tool string check 21 1535   Computer swapped after failure to start HLDS because of EDTC patch
Tool string RIH 21 1620 0 Started 1500 ft/h; sped up to 6000 ft/h below 100 mbrf
Pause at seafloor 21 1730 1700 Purpose was to stabilize tool temperature to limit influence on temperature log
Tool string at EOP 21 1800 1711 Start downlog
Turn on WHC 21 1805 1755  
Turn off WHC 21 1825 1900 WHC motion choppy; not much heave to compensate, so not necessary
End downlog 21 2103 3060 Maximum temperature at bottom = 144.6°C (MTT)
Begin uplog Pass 1 21 2105 3060 Tight hole (~5 inches) with first caliper readings
End uplog Pass 1 21 2130 2900 Tool sent back to TD 3000 ft/h
Begin uplog Pass 2 21 2140 3048 Could not go deeper than 3048 mbrf; likely tight hole
Close caliper 22 035 1750 Go back down to 1800 mbrf to fix spooling
Pull into pipe 22 045 1737  
Tool string inside pipe 22 050 1711 Tool mostly inside pipe; impossible to pull further
End of Pass 2 22 516 1711  
Kinley operations
Kinley crimper RIH 22 655   Based on depth, it takes an hour to work tool down
Kinley hammer RIH 22 800    
Kinley crimper 2 RIH 22 900   Tool did not lose power after first crimper; may have not worked
Kinley hammer RIH 22 1000    
Kinley cutter RIH 22 1035    
Kinley hammer RIH 22 1145   Wireline severed at 1200 h; pulled to surface
End of wireline on deck 22 1330   Start tripping pipe; camera run to seafloor to check position of tools
Tool string at surface 22 1715 0 MTT and bottom of HRLA sticking out of bit
Rig floor clear 22 1930    
Run 2: VSI
Start protected species watch 23 600    
Rig floor preparation 23 800    
Tool string rig up 23 815    
Tool string RIH 23 835 0 Started at 1500 ft/h; sped up to 4000 ft/h below ~100 mbrf
Tool string at EOP 23 1010   Apparent ledge at ~1718 mbrf; passed at 1025 h; other tight spot 1746 mbrf
Stop to calibrate GR depth 23 1040 1916.0 Stop at 1916 mbrf to log up across a peak in GR to match depths with triple combo
First station 23 1100 1804.6 First shot fired at 1105 h; following shots to tune (sync) the two guns
Continue descent 23 1118 1804.6 First station complete
Turn on WHC 23 1128   WHC turned on to check efficiency and evaluate noise on geophone
Test WHC 23     WHC not helping; turned off at 1138 h
Reach TD 23 1225 3040  
Begin uplog Pass 1 23 1235 3016–2966 Stations tried at 3016, 3014, 3004, 2990, and 2966 mbrf; no success
Pull up 23 1335   Decide to try at shallower depth
Last station 23 1355 2716 Attempt to renew success of first station; no luck; assume tool damaged
Pull up 23 1358 2716  
Pull tool string into pipe 23 1435 1708 Trouble at bit confirms damaged arm; pulled 3000 lb (head tension) to come through
Check tool opening 23 1445 1655 Try to open arm; indicates >17 inches; arm definitely damaged
Tool string at surface 23 1535 0 VSI is missing extension arm; shuttles swapped for following run in the remaining daylight
Run 3: VSI
Tool string rig up 23 1600    
Tool string RIH 23 1605 0  
Stop to calibrate GR depth 23 1700 1840 Stop to match depth with main triple combo pass across GR peak; shifted 3 m
First station 23 1705 1782 Noisy signal; three successful station recorded between 1782 and 1742 mbrf
Pull into pipe 23 1735 1711 No problem
Station in pipe 23 1740 1696 Noisy; more attempts at 1656 mbrf; last shot fired at 1759 h
Pull tool to surface 23 1800 1656  
Tool string at surface 23 1853 0 Arm slightly bent - will be straightened overnight
Tools rigged down 23 1905    
Rig floor clear 23 1910   Rig floor cleared for tripping pipe down to 2356 mbrf (700 mbsf) for sonic
Run 4: sonic
Rig floor preparation 23 2200    
Tool string rig up 23 2215    
Tool string check 23 2230    
Tool string RIH 23 2245 0 Pick up speed to 6000 ft/h below 100 mbrf; stop to test tension at 2325 mbrf
Start downlog 24 014 2323 Losing head tension at 2345 mbrf (11 m above bit); could not go deeper
End downlog 24 113 2345 Apply ~2000 lb overpull to move tools, continue overpull through BHA
Run up in pipe 24 117 2298 Normal head tension return once out of BHA in normal diameter pipe
Tool string at surface 24 255   Inspect string - centralizers intact (no noticeable wear from pipe)
Tools rigged down 24 330    
Rig floor cleared 24 335   Rig floor cleared for tripping pipe up to 1759 mbrf (below tight spots) for VSI
Run 5: VSI
Rig floor preparation 24 600   Prepare rig floor after deployment of XCB core barrel to confirm that pipe is clear
Start protected species watch 24 630    
Tool string rig up 24 705    
Tool string check 24 720    
Tool string RIH 24 725 0 Started at 2000 ft/h down to ~100 mbrf, then sped up
Tool string at EOP 24 827 1759  
GR matching pass 24 832 1850 Stop to log up, shift depth to match GR from previous run (2.8 m shift)
Continue downlog pass 24 844 1820  
Turn on WHC 24 849 1820 Modify some WHC parameters, trying to smooth jerky up-motion
RIH to TD 24 910   Ledge at 2412 m, worked past it
Reach TD 24 950 3020 Chose a point below deepest station to stop, then run up
Begin VSP stations 24 952 3016 First, deepest station at 3016 mbrf and continue up
Turn off WHC 24 1305 2596 Test WHC by turning off for three stations, shots are still noisy
Turn on WHC 24 1335 2513 Turn WHC on again because it is not making things worse
Final VSP station 24 1701 1832 Last shots fired at 1705 h
Turn off WHC 24 1712   Turn off WHC and run up to pipe depth; caliper only closing to 9 inches
Pull into pipe 24 1720 1759 Some head tension entering pipe/passing through BHA; caliper is bent but closes to 3 inches
Everything past bit and Kinley sub 24 1729 1725 End of pass
Run up 24 1730 1725 Head tension back to normal; slow to 4000 ft/h at 200 mbrf, to 2000 ft/h at 70 mbrf
Tool string at surface 24 1836 0 Confirm that caliper is slightly bent
Tools rigged down 24 1845   Rig floor cleared for tripping pipe down to 2356 mbrf for second sonic log attempt
Run 6: sonic
Tool string rig up 24 2020    
Tool string check 24 2040    
Tool string RIH 24 2045 0 Pick up speed to 7000 ft/h below 50 mbrf
Start downlog 24 2217 2333 Slow to 1100 ft/h just above bit
Tool string at EOP 24 2225 2380 No trouble through BHA or bit
Turn on WHC 24 2230 2400 Turn on WHC
Reach TD; end downlog 25 027 3040 Ledge at 3040 mbrf; can’t pass so this is TD
Begin uplog Pass 1 25 031 3040  
Turn off WHC 25 226 2392  
Pull into pipe 25 236 2365  
End uplog Pass 1 25 241 2321  
Run up in pipe 25 245 2321 No problems with Kinley sub or BHA; run up in pipe at 6000 ft/h
Tool string at surface 25 405 0  
Tools rigged down 25 430    
Rig floor cleared 25 435   Rig floor cleared for tripping pipe back up to 1759 mbrf for final MSS run
Run 7: MSS
Tool string rig up 25 600    
Tool string check 25 605    
Tool string RIH 25 615 0  
Start downlog 25 655 1732  
Tool string at EOP 25 700 1759  
Turn on WHC 25 705 1815 Turn on WHC and continue RIH at 5000 ft/h
Reach TD; end downlog 25 729 2419 Depth of thermal limit for tool (80°C), LEH-MT = 75°C
Begin uplog Pass 1 25 731 2419 Fast main pass
End uplog Pass 1 25 757 1761 Complete main pass; RIH to 500 mbsf for repeat pass
Begin uplog Pass 2 25 809 2165 Slow repeat pass at 1500 ft/h
Turn off WHC 25 901 1795  
Pull into pipe 25 902 1759 No problems coming into bit, or with Kinley sub or BHA
Reach seafloor (up) 25 910 1637  
End uplog Pass 2 25 910 1637 Run up in pipe at 5000 ft/h
Tool string at surface 25 1000 0 End calibration for EDTC-B ~10 min
Tools rigged down 25 1015    
Rig floor cleared 25 1022    

Ship local time = UTC – 2. RIH = run in hole, EOP = end of pipe, WHC = wireline heave compensator, HLDS = Hostile Environment Litho-Density Sonde, EDTC = Enhanced Digital Telemetry Cartridge, MTT = Modular Temperature Tool, VSI = Versatile Seismic Imager, HLRA = High-Resolution Laterolog Array, MSS = Magnetic Susceptibility Sonde, TD = total depth, GR = gamma ray, BHA = bottom-hole assembly, XCB = extended core barrel, LEH-MT = logging equipment head–mud temperature.

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