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WellCensus

Deepest wells in America

The 100 deepest catalogued wellbores by published total/measured depth. Depth coverage is honest-but-partial: only NM, WY, CO, ND publish depth today (Oklahoma and California do not), and modern horizontal laterals rank by measured — not vertical — depth. See methodology.

Dataset updated . Derived from public data sources.

100 deepest catalogued U.S. oil & gas wells by published depth
WellAPI #StatusTypeLocationOperatorDepth
Partridge 41-13H33-025-05043ActiveOilDunn, NDMarathon Oil Company31,781 ft
Sunell 11-17h33-025-05003ActiveOilDunn, NDMarathon Oil Company31,669 ft
Clawson 11-18H33-025-05044ActiveOilDunn, NDMarathon Oil Company31,664 ft
Semerad 11-18H33-025-05045ActiveOilDunn, NDMarathon Oil Company31,614 ft
Nystuen 20-17-8-5 1H33-105-06543ActiveOilWilliams, NDPhoenix Operating LLC31,594 ft
Bjorge 41-18h33-025-05004ActiveOilDunn, NDMarathon Oil Company31,532 ft
Owan 5402 43-26 3BU33-105-06375ActiveOilWilliams, NDOasis Petroleum North America LLC31,328 ft
Willow Gray 2-11-14-23 6H-LL33-023-01641ActiveOilDivide, NDPhoenix Operating LLC31,140 ft
EN-Hilleren- 157-94-1336H-133-061-05330ActiveOilMountrail, NDHess Bakken Investments Ii, LLC31,140 ft
Violet Olson 5596 13-5 2B33-105-06401ActiveOilWilliams, NDWhiting Oil And Gas Corporation31,080 ft
Nystuen 20-17-8-5 2H33-105-06544ActiveOilWilliams, NDPhoenix Operating LLC31,076 ft
EN-Hilleren- 157-94-1336H-233-061-05500ActiveOilMountrail, NDHess Bakken Investments Ii, LLC30,979 ft
Nystuen 20-17-8-5 5H33-105-06546ActiveOilWilliams, NDPhoenix Operating LLC30,926 ft
Violet Olson 5596 13-5 4B33-105-06403ActiveOilWilliams, NDWhiting Oil And Gas Corporation30,900 ft
Nystuen 20-17-8-5 3H33-105-06505ActiveOilWilliams, NDPhoenix Operating LLC30,875 ft
Nystuen 20-17-8-5 4H33-105-06545ActiveOilWilliams, NDPhoenix Operating LLC30,850 ft
Willow Gray 2-11-14-23 5H33-023-01640ActiveOilDivide, NDPhoenix Operating LLC30,844 ft
BL-JE Ulven- 155-96-0322H-133-105-06242ActiveOilWilliams, NDHess Bakken Investments Ii, LLC30,800 ft
BL-JE Ulven- 155-96-0322H-233-105-06243ActiveOilWilliams, NDHess Bakken Investments Ii, LLC30,705 ft
Rystedt 5892 31-28 2B33-061-05389Shut-inOilMountrail, NDOasis Petroleum North America LLC30,565 ft
Feiring State 5793 13-16 3BU33-061-05524ActiveOilMountrail, NDOasis Petroleum North America LLC30,250 ft
Feiring State 5793 13-16 2BU33-061-05523ActiveOilMountrail, NDOasis Petroleum North America LLC30,090 ft
33-32-31-36 4BH Blue 3-6505-001-10556ActiveOilAdams, COCrestone Peak Resources Operating LLC29,046 ft
33-32-31-36 1BH Blue 3-6505-001-10550ActiveOilAdams, COCrestone Peak Resources Operating LLC28,976 ft
1BH Sky Ranch 4-65 10-9-8-705-005-07538ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,929 ft
04n K205-123-48615ActiveOilWeld, COPdc Energy Inc28,927 ft
33-32-31-36 4AH Blue 3-6505-001-10555ActiveOilAdams, COCrestone Peak Resources Operating LLC28,852 ft
33-32-31-36 3BH Blue Fed 3-6505-001-10554ActiveOilAdams, COCrestone Peak Resources Operating LLC28,849 ft
Ross 103-1606H33-061-05511ActiveOilMountrail, NDEog Resources, Inc.28,848 ft
4BH Sky Ranch 4-65 10-9-8-705-005-07544ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,830 ft
2AH Sky Ranch 4-65 10-9-8-705-005-07539ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,822 ft
3BH Sky Ranch 4-65 10-9-8-705-005-07542ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,820 ft
2BH Sky Ranch 4-65 10-9-8-705-005-07540ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,819 ft
03n K205-123-48613ActiveOilWeld, COPdc Energy Inc28,796 ft
02n K205-123-48600ActiveOilWeld, COPdc Energy Inc28,795 ft
4AH Sky Ranch 4-65 10-9-8-705-005-07543ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,754 ft
33-32-31-36 3AH Blue Fed 3-6505-001-10553ActiveOilAdams, COCrestone Peak Resources Operating LLC28,706 ft
33-32-31-36 2AH Blue 3-6505-001-10551ActiveOilAdams, COCrestone Peak Resources Operating LLC28,699 ft
05n K205-123-48606ActiveOilWeld, COPdc Energy Inc28,684 ft
3AH Sky Ranch 4-65 10-9-8-705-005-07541ActiveOilArapahoe, COCrestone Peak Resources Operating LLC28,677 ft
Wiseman 31-36-35-34 #4H33-105-05913ActiveOilWilliams, NDKraken Operating, LLC28,675 ft
16-17-18-13 2bh Quicksilver 3-6505-001-10623ActiveOilAdams, COCrestone Peak Resources Operating LLC28,655 ft
Wiseman 31-36-35-34 #2H33-105-05911ActiveOilWilliams, NDKraken Operating, LLC28,595 ft
16-17-18-13 4bh Quicksilver 3-6505-001-10627ActiveOilAdams, COCrestone Peak Resources Operating LLC28,590 ft
16-17-18-13 3bh Quicksilver 3-6505-001-10625ActiveOilAdams, COCrestone Peak Resources Operating LLC28,545 ft
16-17-18-13 3ah Quicksilver 3-6505-001-10624ActiveOilAdams, COCrestone Peak Resources Operating LLC28,489 ft
16-17-18-13 4ah Quicksilver 3-6505-001-10628ActiveOilAdams, COCrestone Peak Resources Operating LLC28,481 ft
Hopes 30-27f 1h33-053-10159ActiveOilMckenzie, NDDevon Energy Williston, L.L.C28,281 ft
Periscope Federal 9-10-7tfh33-061-04493ActiveOilMountrail, NDSlawson Exploration Company, Inc.28,207 ft
Submariner Federal 2-23-20h33-061-03892ActiveOilMountrail, NDSlawson Exploration Company, Inc.28,186 ft
Periscope Federal 5-10-7tfh33-061-04489ActiveOilMountrail, NDSlawson Exploration Company, Inc.28,160 ft
Periscope Federal 4-10-7tfh33-061-04492ActiveOilMountrail, NDSlawson Exploration Company, Inc.28,160 ft
Thunderhill Federal 5302 33-3 2B33-105-06045ActiveOilWilliams, NDOasis Petroleum North America LLC28,135 ft
Thistle Unit #180h30-025-48098ActiveOilLea, NMDevon Energy Production Company, LP28,133 ft
Hopes 30-27f 2h33-053-10160ActiveOilMckenzie, NDDevon Energy Williston, L.L.C28,126 ft
Niles 19-22f 4h33-053-09981ActiveOilMckenzie, NDDevon Energy Williston, L.L.C28,063 ft
Thistle Unit #121h30-025-43732ActiveOilLea, NMDevon Energy Production Company, LP28,048 ft
Thistle Unit #108h30-025-43727ActiveOilLea, NMDevon Energy Production Company, LP28,045 ft
Thistle Unit #183h30-025-49425ActiveOilLea, NMDevon Energy Production Company, LP28,013 ft
Thistle Unit #185h30-025-49427ActiveOilLea, NMDevon Energy Production Company, LP28,002 ft
Niles 19-22f 3h33-053-09980ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,977 ft
Niles 19-22f 1h33-053-09978ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,960 ft
Thistle Unit #182h30-025-48097ActiveOilLea, NMDevon Energy Production Company, LP27,956 ft
Regal Lager 31 19 Federal Com #034h30-025-52491ActiveOilLea, NMOxy USA Inc27,950 ft
Regal Lager 31 19 Federal Com #035h30-025-52492ActiveOilLea, NMOxy USA Inc27,930 ft
Sponheim 31-34f 2h33-053-10163ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,928 ft
Thistle Unit #181h30-025-48096ActiveOilLea, NMDevon Energy Production Company, LP27,907 ft
Supreme Federal Com #606h30-025-49675ActiveOilLea, NMCog Operating LLC27,901 ft
Hopes 30-27f 3h33-053-10161ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,900 ft
Regal Lager 31 19 Federal Com #036h30-025-52493ActiveOilLea, NMOxy USA Inc27,893 ft
Poker Lake Unit 22 Dtd #105h30-015-49860Other statusGasEddy, NMXto Permian Operating LLC.27,890 ft
Daniel Ferrari 3-10-15-22 4H33-023-01586ActiveOilDivide, NDPhoenix Operating LLC27,889 ft
Sponheim 31-34f 1h33-053-10162ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,872 ft
Cotton Draw Unit #604h30-015-49302ActiveGasEddy, NMDevon Energy Production Company, LP27,864 ft
Wiseman 31-36-35-34 #5H33-105-06044ActiveOilWilliams, NDKraken Operating, LLC27,860 ft
Regal Lager 31 19 Federal Com #031h30-025-52488ActiveOilLea, NMOxy USA Inc27,850 ft
Niles 19-22f 2h33-053-09979ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,840 ft
Hopes 30-27f 5h33-053-10137ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,811 ft
Foster 4-9-16 #4h33-105-06463ActiveOilWilliams, NDNeptune Operating LLC27,770 ft
Reidle 6-3F 4H33-053-09923ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,767 ft
Teddy Federal 12x-5exh33-025-03551ActiveOilDunn, NDXto Energy Inc27,759 ft
Reidle 6-3F 1H33-053-09920ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,759 ft
Poker Lake Unit 27 Bd #161h30-015-46249ActiveGasEddy, NMXto Permian Operating LLC.27,746 ft
Hopes 30-27f 4h33-053-10136ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,745 ft
Liberty LR 72-3633H33-061-05454ActiveOilMountrail, NDEog Resources, Inc.27,732 ft
Daniel Ferrari 3-10-15-22 3H33-023-01591ActiveOilDivide, NDPhoenix Operating LLC27,720 ft
Submariner Federal 7-23-20tfh33-061-03893ActiveOilMountrail, NDSlawson Exploration Company, Inc.27,716 ft
Barnes Federal 5202 43-11 2B33-053-10297ActiveOilMckenzie, NDOasis Petroleum North America LLC27,705 ft
Submariner Federal 5-23-20tfh33-061-03769ActiveOilMountrail, NDSlawson Exploration Company, Inc.27,665 ft
Bing Clawsby Wc Federal Com #703h30-025-51266ActiveOilLea, NMMarathon Oil Permian LLC27,649 ft
Reidle 6-3F 2H33-053-09921ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,641 ft
Barnes Federal 5202 43-11 5B33-053-10299ActiveOilMckenzie, NDOasis Petroleum North America LLC27,625 ft
Teddy Federal 12x-5hxe33-025-03555ActiveOilDunn, NDXto Energy Inc27,621 ft
Liberty LR 132-3633H33-061-05457ActiveOilMountrail, NDEog Resources, Inc.27,602 ft
Reidle 6-3F 3H33-053-09922ActiveOilMckenzie, NDDevon Energy Williston, L.L.C27,597 ft
Submariner Federal 6-23-20tfh33-061-03767ActiveOilMountrail, NDSlawson Exploration Company, Inc.27,537 ft
Finn 13-25f Xw 1h33-105-06537ActiveOilWilliams, NDDevon Energy Williston, L.L.C27,515 ft
Chase 2-18HSL33-025-04788ActiveOilDunn, NDContinental Resources, Inc.27,469 ft
Archerfield 5602 43-16 2BX33-105-06073ActiveOilWilliams, NDOasis Petroleum North America LLC27,467 ft
Coan 41-21h33-025-04720ActiveOilDunn, NDMarathon Oil Company27,465 ft

Maximum published depth by state

StateMax depthCatalogued wells
North Dakota31,781 ft43,680
Colorado29,046 ft124,327
New Mexico28,133 ft141,088
Wyoming25,830 ft129,955