Home
>
Petroleum
>
Navigator
Energy Glossary
View History:
Monthly
Annual
Download Data (XLS File)
U.S. Dry Developmental Wells Drilled (Number of Elements)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1973
330
336
380
291
355
344
365
421
359
397
405
385
1974
377
310
403
423
458
391
507
444
484
527
454
505
1975
515
408
456
482
500
542
526
599
649
685
599
556
1976
637
522
574
591
563
588
549
554
580
645
592
591
1977
540
517
642
620
660
630
655
747
640
710
691
650
1978
693
494
645
680
718
763
706
844
802
805
745
691
1979
655
526
665
572
689
675
668
802
771
936
844
859
1980
880
720
772
829
954
996
1,035
1,127
1,096
1,156
1,081
1,058
1981
1,291
1,021
1,188
1,172
1,306
1,328
1,356
1,452
1,360
1,407
1,307
1,365
1982
1,479
1,151
1,351
1,281
1,134
1,170
1,292
1,314
1,209
1,226
1,236
1,217
1983
1,300
1,086
1,170
975
1,004
1,114
1,187
1,284
1,176
1,368
1,297
1,179
1984
1,324
1,031
1,080
989
1,152
1,347
1,292
1,501
1,253
1,185
1,220
1,189
1985
1,149
869
1,129
1,100
1,023
1,016
1,102
1,146
982
1,014
798
929
1986
1,024
753
790
634
516
477
552
523
510
479
462
512
1987
462
390
414
481
491
470
559
565
564
645
520
554
1988
516
424
426
436
494
482
471
467
471
478
358
385
1989
329
224
311
389
336
375
379
408
395
417
376
363
1990
345
307
322
325
356
370
408
471
414
482
499
404
1991
343
390
384
385
369
391
411
362
360
409
342
346
1992
296
264
304
271
336
299
287
342
330
350
332
323
1993
291
276
266
318
388
325
427
334
403
336
328
312
1994
244
202
241
242
219
248
267
314
272
297
244
260
1995
208
264
205
224
246
285
275
284
263
260
251
275
1996
302
232
236
234
261
263
273
307
304
346
301
282
1997
292
287
263
309
288
333
359
349
323
331
331
312
1998
260
312
259
266
316
287
266
268
217
255
225
225
1999
189
154
137
150
169
189
187
234
238
226
222
242
2000
207
190
203
234
250
240
259
314
200
236
225
226
2001
243
207
211
224
263
266
236
283
225
256
212
199
2002
198
166
180
194
194
205
218
247
219
223
196
195
2003
190
179
177
224
219
224
218
250
251
273
201
207
2004
197
160
192
219
236
197
204
244
267
259
234
235
2005
224
183
252
237
255
297
276
294
258
271
272
262
2006
299
263
300
289
254
316
282
291
258
300
314
247
2007
266
214
264
226
284
248
287
340
253
319
261
238
2008
248
247
297
304
311
318
322
332
-
= No Data Reported;
--
= Not Applicable;
NA
= Not Available;
W
= Withheld to avoid disclosure of individual company data.
Release Date: 10/7/2008
Next Release Date: 10/31/2008
Referring Pages:
Crude Oil and Natural Gas Exploratory and Development Wells