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Energy Glossary
Crude Oil and Natural Gas Drilling Activity
Period:
Monthly
Annual
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Definitions, Sources & Notes
Data Series
2003
2004
2005
2006
2007
2008
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History
Rotary Rigs in Operation
1,032
1,192
1,381
1,649
1,768
1,879
1949-2008
By Site
Onshore
924
1,095
1,287
1,559
1,695
1,814
1949-2008
Offshore
108
97
94
90
72
65
1949-2008
By Type
Crude Oil
157
165
194
274
297
379
1973-2008
Natural Gas
872
1,025
1,184
1,372
1,466
1,491
1973-2008
Active Well Service Rig Count
1,967
2,064
2,222
2,364
2,388
2,515
1973-2008
-
= No Data Reported;
--
= Not Applicable;
NA
= Not Available;
W
= Withheld to avoid disclosure of individual company data.
Notes:
Rotary rigs in operation are reported weekly. Monthly data are averages of 4- or 5-week reporting periods, not calendar months. Annual data are averages over 52 or 53 weeks, not calendar year. Published data are rounded to the nearest whole number. Geographic coverage is the 50 States and the District of Columbia. See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 6/5/2009
Next Release Date: 7/3/2009