E21B 43/00
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials
Official title: Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (applicable only to water E03B)
E21B43/00 (Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials) appears on 28,681 US grants and 27,851 published applications in this corpus.
Search patents in E21B- Granted patents
- 28,681
- Published applications
- 27,851
- Assignees
- 5,342
- Inventors
- 34,875
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 220 | 0 |
| 1977 | 216 | 0 |
| 1978 | 257 | 0 |
| 1979 | 168 | 0 |
| 1980 | 233 | 0 |
| 1981 | 242 | 0 |
| 1982 | 192 | 0 |
| 1983 | 273 | 0 |
| 1984 | 344 | 0 |
| 1985 | 272 | 0 |
| 1986 | 256 | 0 |
| 1987 | 321 | 0 |
| 1988 | 226 | 0 |
| 1989 | 261 | 0 |
| 1990 | 212 | 0 |
| 1991 | 266 | 0 |
| 1992 | 242 | 0 |
| 1993 | 239 | 0 |
| 1994 | 270 | 0 |
| 1995 | 254 | 0 |
| 1996 | 197 | 0 |
| 1997 | 157 | 0 |
| 1998 | 199 | 0 |
| 1999 | 251 | 0 |
| 2000 | 286 | 0 |
| 2001 | 336 | 85 |
| 2002 | 297 | 403 |
| 2003 | 328 | 474 |
| 2004 | 374 | 517 |
| 2005 | 278 | 542 |
| 2006 | 455 | 480 |
| 2007 | 357 | 564 |
| 2008 | 385 | 626 |
| 2009 | 375 | 785 |
| 2010 | 593 | 840 |
| 2011 | 497 | 925 |
| 2012 | 631 | 1015 |
| 2013 | 693 | 1241 |
| 2014 | 832 | 1468 |
| 2015 | 979 | 1599 |
| 2016 | 1038 | 1730 |
| 2017 | 1186 | 1677 |
| 2018 | 1416 | 1693 |
| 2019 | 1723 | 1615 |
| 2020 | 1665 | 1657 |
| 2021 | 1563 | 1704 |
| 2022 | 1572 | 1501 |
| 2023 | 1521 | 1356 |
| 2024 | 1380 | 1401 |
| 2025 | 1309 | 1184 |
| 2026 | 844 | 769 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 43/25Methods for stimulating production8,187
- E21B 43/16Enhanced recovery methods for obtaining hydrocarbons6,243
- E21B 43/12Methods or apparatus for controlling the flow of the obtained fluid to5,758
- E21B 43/02Subsoil filtering4,838
- E21B 43/11Perforators2,785
- E21B 43/34Arrangements for separating materials produced by the well2,517
- E21B 43/01Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials1,565
- E21B 43/30Specific pattern of wells1,402
All 16 subgroupsShow fewer
- E21B 43/14Obtaining from a multiple-zone well1,359
- E21B 43/28Dissolving minerals other than hydrocarbons504
- E21B 43/006Production of coal-bed methane302
- E21B 43/003Vibrating earth formations294
- E21B 43/32Preventing gas- or water-coning phenomena, i.e. the formation of a conical column190
- E21B 43/29Obtaining a slurry of minerals141
- E21B 43/295Gasification of minerals90
- E21B 43/285Melting minerals20
Recent patents
- Direct high pressure slurry injection fracturing system and method6 Oct 2026US 12,752,247 B1
- Blend of polyarylether ketone copolymer6 Oct 2026US 12,753,305 B2Syensqo Specialty Polymers USA, LLC
- Method of improving injection pressure and asphaltene remediation6 Oct 2026US 12,753,337 B2
- Method of fracturing using a xanthan/guar gum containing fluid6 Oct 2026US 12,753,361 B1Sunita Hydrocolloids Inc.
- Systems and methods of deploying a wiper plug in a downhole tubular string6 Oct 2026US 12,753,670 B1Halliburton Energy Services.Inc.
- Method and apparatus for confining the spread of pollutants spilled into a moving fluid8 Oct 2026US 2026/0308859 A1
- High pressure fluid jet drill system8 Oct 2026US 2026/0308985 A1Dig Energy, Inc.
- Bi-directional Running Tool for Expandable Liner Hanger8 Oct 2026US 2026/0309007 A1Halliburton Energy Services.Inc.
- Disposable perforation tool8 Oct 2026US 2026/0309008 A1Schlumberger Technology Corporation
- Managing regenerative energy of reciprocating pumping unit8 Oct 2026US 2026/0309009 A1Weatherford Technology Holdings, LLC
Most cited
By later US patents
- Controlling hydrocarbon production609US 10,677,035 B2Saudi Arabian Oil Company · 2020
- Method of completing an uncased section of a borehole576US 5,366,012 AShell Oil Company · 1994
- Method and a plant for transport of hydrocarbons over a long distance from an offshore source of hydrocarbons555US 4,991,614 AKvaerner Engineering A.S. · 1991
- Mobile electric power generation for hydraulic fracturing of subsurface geological formations496US 9,534,473 B2Evolution Well Services, LLC · 2017
- In-situ tuned microwave oil extraction process483US 5,082,054 A1992