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Special Holes

For data from all expeditions, see the LIMS Ocean Drilling Data Overview.

Reentry cones

Leg Site Hole Special Hole Type Location Latitude Longtitude Water Depth Total Penetration (m) Basement Penetration (m) Casing (m) Special Hole Comment
15 146 A Reentry cone Caribbean Sea 15 7'N 69 23'W 3949 105 24 50/- Lacks second casing string
34 319 A Reentry cone East Pacific Rise - E flank 13 1'S 101 31'W 4290 157 59 66/- Lacks second casing string; bad hole conditions in basement
34 320 B Reentry cone Peru Basin 9 0'S 83 32'W 4483 183 29 65/- Lacks second casing string; bad hole conditions in basement
37 333 A Reentry cone Mid-Atlantic Ridge - W flank 36 50'N 33 40'W 1666 529 311 70/- Lost BHA at 488 mbsf; DIANAUT reentry 1990
45 395 A Reentry cone Mid-Atlantic Ridge - W flank 22 45'N 46 5'W 4494 664 572 62/112 First time setting a reentry cone and casing to basement on deep-sea floor.Hole packed with mud; left open.
46 396 B Reentry cone Mid-Atlantic Ridge - E flank 22 59'N 43 31'W 4459 406 254 120/163 Logged and left open.Wireline reentry: FARE 1998; SISMOBS seismometer tests 1992.
47 398 D Reentry cone Galicia Bank 40 58'N 10 43'W 3910 1740 0 80/- Hole filled with sediments
50 415 A Reentry cone off Morocco 31 2'N 11 39'W 2794 1080 0 68/311 Bad hole conditions; filled with cavings/mud
50 416 A Reentry cone off Morocco 32 50'N 10 48'W 4191 1624 0 40/- Lacks second casing string; bad hole conditions
51 417 D Reentry cone S Bermuda Rise 25 7'N 68 3'W 5482 532 366 25/- Cone plugged with mud; lost BHA in deepest 100m
52 418 A Reentry cone S Bermuda Rise 25 2'N 68 3'W 5511 570 544 71/- Cone plugged with mud
55 433 C Reentry cone Suiko Seamount 44 47'N 170 1'E 1874 550 388 40/- Lacks second casing string
58 442 B Reentry cone Shikoku Basin 28 59'N 136 3'E 4634 455 165 57/- Lacks second casing string; bad hole conditions
61 462 A Reentry cone Nauru Basin 7 15'N 165 2'E 5177 1068 452 75/- Lacks second casing string; basement = sill/sediment sequence
69 504 A Reentry cone Costa Rica Rift 1 14'N 83 44'W 3458 277 12 90/- Lacks second casing string; abandoned when 14 in bit cone lost
69 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3460 489 226 90/276 Total penetration at end of Leg 69 = 501 meters. Hole 504B also visited Legs 70; 83; 92; 111; 137; 140;and 148.
70 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3460 836 561 90/276 Total penetration at end of Leg 70 = 836.1 meters. Hole 504B also visited Legs 69; 83; 92; 111; 137; 140;and 148.
76 534 A Reentry cone East of Blake Escarpment 28 21'N 75 23'W 4971 1666 32 86/533 Wireline reentry: LFASE; 1989; DIANAUT; 1990
78 395 A Reentry cone Mid-Atlantic Ridge - W flank 22 45'N 46 5'W 4483   572 62/112 Reoccupied for the purpose of downhole geophysical experiments; including downhole seismometer.Left open.
83 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3460 1350 1075 90/276 Total penetration at end of Leg 83 = 1350.0 meters. Hole 504B also visited Legs 69; 70; 92; 111; 137; 140;and 148.
91 595 B Reentry cone SW Pacific 23 49'S 165 32'W 5615 124 54 34/74 Ngendei experiment; 1983; stinger left in hole
92 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3464 1204 929 90/276 Total penetration at end of Leg 92 = 1204.0 meters (junk in hole?). Hole 504B also visited Legs 69; 70; 83; 111; 137; 140;and 148.
92 597 C Reentry cone East Pacific Rise - W flank 18 48'S 129 46'W 4164 144 91 40/- Lacks second casing string; good hole in fastest-spread crust
103 638 C Reentry cone Galicia margin 42 9'N 12 12'W 4673 547 0 40/- Lacks second casing string
104 642 E Reentry cone Norwegian margin 67 13'N 2 56'E 1278 1229 917 51/372 Top of cone at seafloor; basement = sill/sediment sequence
105 645 E Reentry cone Baffin Bay 70 27'N 64 39'W 2008 1147 0 21/- Lacks second casing string; sediment bridges in open hole
106 648 B Reentry cone Mid-Atlantic Ridge axis 22 55'N 44 57'W 3333 33 50 9/27 Hard Rock Guide Base.
109 395 A Reentry cone Mid-Atlantic Ridge - W flank 22 45'N 46 5'W 4490   572 62/112 Reoccupied for the purpose of downhole geophysical experiments; especially temperature; insitu porosity and permeability; and resistivity.
111 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3460 1562 1287 90/276 Total penetration at end of Leg 111 = 1562.1 meters junk in hole. Hole 504B also visited Legs 69; 70; 83; 92; 137; 140;and 148.
118 735 B Reentry cone Atlantis II Fracture Zone 32 43'S 57 16'E 720 501 501 none Hard Rock Guide Base
123 765 D Reentry cone Argo Abyssal Plain 15 59'S 117 35'E 5714 1195 271 91/933 4th longest DSDP/ODP casing
126 793 B Reentry cone Bonin Arc-Trench System 31 6'N 140 53'E 2965 1682     562.66 meters of 11 3/4 inch casing
127 794 C Reentry cone Japan Sea 40 11'N 138 14'E 2809 654     Reentry cone set.Drill pipe broken off in hole.
127 797 C Reentry cone Japan Sea 38 37'N 134 32'E 2865 900     Reentry cone set.Drill pipe broken off in hole.
128 794 D Reentry cone Japan Sea 40 11'N 138 14'E 2807 734 192 58/560 Broadband seismometer experiment 1989; still in hole
128 799 B Reentry cone Japan Sea 39 13'N 133 52'E 2084 1084     Re-entry cone
129 801 C Reentry cone West Pacific Jurassic 18 39'N 156 22'E 5674 594 477 51/481 Oldest sampled oceanic crust; Leg 185: 7.4 m DCB coring to TD with 7-1/2 in diameter
130 807 C Reentry cone Ontong Java Plateau 3 36'N 156 38'E 2806 1528 148 58/350 Two bit cones lost in hole
131 808 D Reentry cone Nankai Trough 32 21'N 134 57'E 4673 780 0 21/? 741 m 11-3/4 in casing lost on deployment; partly on sea floor
131 808 E Reentry cone Nankai Trough 32 21'N 134 57'E 4673 1200 0 21/521 Bad hole conditions below casing; ONDO experiment lost in hole
132 809 F Reentry cone Sumisu Rift 31 3'N 139 53'E 1802 79 79 none Mini-HRGB; slim hole cored with DCS
137 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3460 1622 1346 90/276 Total penetration at end of Leg 137 = 1621.5 meters. Hole 504B also visited Legs 69; 70; 83; 92; 111; 140;and 148.
139 856 H Reentry cone Middle Valley Juan de Fuca Ridge 48 26'N 128 41'W 2424 94     Small reentry funnel installed with a 12-m joint of 11-3/4-in. of drill-in casing.
140 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3463 2000 1725 90/276 Total penetration at end of Leg 140 = 2000.4 meters. Hole 504B also visited Legs 69; 70; 83; 92; 111; 137; and 148.
142 864 A Reentry cone East Pacific Rise axis 9 31'N 104 15'W 2571 15 15 none Hard Rock Guide Base
142 864 B Reentry cone East Pacific Rise axis 9 31'N 104 15'W 2572 3 7 none Hard Rock Guide Base - failure of drilling assembly.Hard Rock Guide Base picked up and moved to new location - 864C.
142 864 C Reentry cone East Pacific Rise axis 9 31'N 104 15'W 2572 7 7 none Hard Rock Guide Base
147 894 G Reentry cone Hess Deep Rift Valley 2 18'N 101 32'W 3023 154 154 5.88/35.56 Hard Rock Guide Base and 10-3/4-in casing string successfully retrieved at end of hole.
148 504 B Reentry cone Costa Rica Rift - S flank 1 14'N 83 44'W 3463 2111 1725 90/276 Total penetration at end of Leg 148 = 2111.0 meters. Hole 504B also visited Legs 69; 70; 83; 92; 111; 137;and 140.
149 899 B Reentry cone Iberia Abyssal Plain 40 46'N 12 16'W 5291 562 192 50/217 Bit released at 539 mbsf
158 957 E Reentry cone TAG active mound 26 8'N 44 50'W 3646 126 126 28/- 13-3/8 in casing; lost BHA below 14 mbsf
158 957 L Reentry cone TAG active mound 26 8'N 44 50'W 3645 67 67 20/- 16 in casing; collapsed formation in open hole
165 999 B Reentry cone Columbia Basin 12 45'N 78 44'W 2828 1066 0 62/534 16 in casing
176 735 B Reentry cone Atlantis II Fracture Zone 32 43'S 57 16'E 721 1508 1508 none Hard Rock Guide Base; lost Bottom Hole Assembly below 600 mbsf.
186 1150 C Reentry cone Japan Tranch 39 11'N 143 20'E 2681 1050 0 58/527/205 Unusable site - 205 m 10-3/4 in casing lost at bottom of hole
192 1185 B Reentry cone Ontong Java Plateau 0 21'S 161 40'E 3899 526 125 28/- Lacks second casing string; only 16 in casing set in full-sized cone
193 1188 F Reentry cone E Manus Basin 3 44'S 151 40'E 1642 387 0 0.4/57/190 Freefall deployed cone with HRRS cone; ADCB cored with 7-1/4 in diameter
206 1256 D Reentry cone Guatemala Basin 6 44'N 91 56'W 3635 752 502 95/269/? 20 in / 16 in casing so far
210 1276 A Reentry cone Newfoundland Margin 45 24'N 44 47'W 4549 1737      
304 1309 D Reentry cone Atlantis Massif 30 10'N 42 7'W 1645 401     Hard Rock Re-entry System used.
309 1256 D Reentry cone Guatemala Basin on Cocos Plate 6 44'N 91 56'W 3635 1255 979   Hole deepened 752.0 to 1255.1.
327 U1362 A Reentry cone Juan de Fuca Hydrogeology 47 45.6628 N 127 45.6720 W 2665 528
327 U1362 B Reentry cone Juan de Fuca Hydrogeology 47 45.4997 N 127 45.7312 W 2665 359
328 U1364 A Reentry cone Cascadia 48 41.9962 N 126 52.3291 W 1318 336 329 Installed RECC & ACORK. Attached 20 jts of 10-3/4 csg to ACORK head. Entire length of ACORK assembly was 329.1 m. Effective depth of assembly into hole was 323.1 m. Installed packer at bottom of 10-3/4 in. csg;
330 U1372 A Reentry cone Louisville Seamount Trail 26 29.6017 S 174 43.7506 W 1958 232.9 187 Free Fall Funnel
330 U1373 A Reentry cone Louisville Seamount Trail 28 33.7513 S 173 16.8499 W 1447 65.7 31.8 Free Fall Funnel.Funnel dislodged hole abandoned.
330 U1374 A Reentry cone Louisville Seamount Trail 28 35.7513 S 173 22.8294 W 1559 522 374.9 Free Fall Funnel
336 U1382 A Reentry cone Mid Atlantic Ridge 22 45.3531 N 046 04.8911 W 4483 210 120 155 Cone set with 53m 16in and 102m of 10.75in casing.CORK set.
336 U1383 B Reentry cone Mid Atlantic Ridge 22 48.1241 N 046 03.1628 W 4414 89.8 56.8 Hole problems.Hole abandoned.
336 U1383 C Reentry cone Mid Atlantic Ridge 22 48.1241 N 046 03.1662 W 4414 331.5 293.2 CORK set.
344 U1412 A Reentry cone Costa Rica Seimogenesis Project 08.44.4482 N 084 06.7993 W 540 582.2 206.95 Free Fall Funnel
345 U1415 J Reentry cone Hess Deep Plutonic Crust 02 15.1604 N 101 32.6622 W 4839 111.8 111.8 Free Fall Funnel.
345 U1415 K Reentry cone Hess Deep Plutonic Crust 02 15.3307 N 101 32.8527 W 4687 35.2 35.2 Free Fall Funnel.Funnel fell on side.Unable to re-enter hole.
345 U1415 M Reentry cone Hess Deep Plutonic Crust 02 15.3304 N 101 32.8040 W 4675 25.9 25.9 Free Fall Funnel.Funnel jammed.Hole abandoned.
345 U1415 P Reentry cone Hess Deep Plutonic Crust 02 15.3304 N 101 32.8121 W 4675 37 37 Free Fall Funnel.
349 U1432 B Reentry cone South China Sea Tectonics 18 21.1062 N 116 23.4512 E 3829 800 787 Funnel Set with 787m casing. Pipe stuck while cementing casing in place. Pipe severed and hole abandoned.
350 U1437 D Reentry cone Izu-Bonin-Mariana Rear Arc 31 47.3872 N 139 01.5730 E 2116 1105 Free Fall Funnel.
351 U1438 D Reentry cone Izu-Bonin-Mariana Rear Arc 27 23.0218 N 134 19.1023 E 4700 898 Free Fall Funnel.
351 U1438 E Reentry cone Izu-Bonin-Mariana Rear Arc 27 23.0153 N 134 19.0898 E 4700 1611 150 605 Re-entry system with 605m of casing.
352 U1439 C Reentry cone Izu-Bonin-Mariana Fore Arc 28 24.4491 N 142 36.5368 E 3129 544.3 178.5 Re-entry system with 178.45m of casing.
352 U1440 B Reentry cone Izu-Bonin-Mariana Fore Arc 28 26.9976 N 142 45.2244 E 4775 383.6 258 98.6 Re-entry system with 98.6m of casing.
354 U1451 B Reentry cone Bengal Fan 08 00.4088 N 088 44.4745 E 3607 1181.3 402 Re-entry system with 402m of casing.
355 U1456 D Reentry cone Arabian Sea Monsoon 16 37.2766 N 068 50.3541 E 3637 1024 455.1 Re-entry system with 455m of casing.
360 U1473 A Reentry cone Southwest Indian Ridge Lower Crust and Moho 32 42.3622 S 057 16.6880 E 710 789.7 789.7 8 Re-entry system with 8m of casing.
362 U1480 G Reentry cone Sumatra Subduction Zone 03 02.0550 N 091 36.3370 E 4147 1431.6 16 755 Re-entry system with 755m of casing.
362 U1481 A Reentry cone Sumatra Subduction Zone 02 45.2861 N 091 45.5771 E 4178 1500 734 Re-entry system with 734m of casing.
366 U1496 C Reentry cone Mariana Convergent Margin 18 06.6068 N 147 06.1001 E 1243 105 105 Re-entry system with 105m of casing.
366 U1497 D Reentry cone Mariana Convergent Margin 16 32.2548 N 147 13.2621 E 2018 120 106 Re-entry system with 106m of casing.
369 U1513 D Reentry cone Australia Cretaceous Climate and Tectonics 33 47.6196 S 112 29.1339 E 2789 757.4 Free Fall Funnel.