E21B 43/12
Methods or apparatus for controlling the flow of the obtained fluid to
Official title: Methods or apparatus for controlling the flow of the obtained fluid to or in wells (E21B43/25 takes precedence; valve arrangements E21B34/00)
E21B43/12 (Methods or apparatus for controlling the flow of the obtained fluid to) appears on 5,758 US grants and 5,883 published applications in this corpus.
Search patents in E21B- Granted patents
- 5,758
- Published applications
- 5,883
- Assignees
- 1,507
- Inventors
- 8,077
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 17 | 0 |
| 1978 | 19 | 0 |
| 1979 | 15 | 0 |
| 1980 | 18 | 0 |
| 1981 | 21 | 0 |
| 1982 | 15 | 0 |
| 1983 | 33 | 0 |
| 1984 | 22 | 0 |
| 1985 | 23 | 0 |
| 1986 | 29 | 0 |
| 1987 | 29 | 0 |
| 1988 | 30 | 0 |
| 1989 | 30 | 0 |
| 1990 | 31 | 0 |
| 1991 | 40 | 0 |
| 1992 | 37 | 0 |
| 1993 | 44 | 0 |
| 1994 | 31 | 0 |
| 1995 | 53 | 0 |
| 1996 | 41 | 0 |
| 1997 | 38 | 0 |
| 1998 | 57 | 0 |
| 1999 | 66 | 0 |
| 2000 | 82 | 0 |
| 2001 | 101 | 21 |
| 2002 | 77 | 84 |
| 2003 | 96 | 84 |
| 2004 | 59 | 90 |
| 2005 | 57 | 103 |
| 2006 | 72 | 115 |
| 2007 | 76 | 105 |
| 2008 | 92 | 131 |
| 2009 | 62 | 190 |
| 2010 | 134 | 152 |
| 2011 | 101 | 186 |
| 2012 | 152 | 181 |
| 2013 | 148 | 243 |
| 2014 | 155 | 270 |
| 2015 | 177 | 330 |
| 2016 | 219 | 353 |
| 2017 | 221 | 378 |
| 2018 | 315 | 349 |
| 2019 | 357 | 314 |
| 2020 | 366 | 379 |
| 2021 | 348 | 369 |
| 2022 | 353 | 330 |
| 2023 | 351 | 298 |
| 2024 | 310 | 337 |
| 2025 | 313 | 294 |
| 2026 | 208 | 197 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inline fracturing valve systems and methods6 Oct 2026US 12,753,683 B2Cameron International Corporation
- Modified gas assisted plunger lift6 Oct 2026US 12,753,684 B2Silverwell Technology Limited
- Shaft lubrication system6 Oct 2026US 12,753,877 B2K&L Technologies, Inc.
- Cables for cable deployed electric submersible pumps6 Oct 2026US 12,755,862 B2Schlumberger Technology Corporation
- Digital tracer for well behavior identification6 Oct 2026US 12,756,199 B2Saudi Arabian Oil Company
- Managing regenerative energy of reciprocating pumping unit8 Oct 2026US 2026/0309009 A1Weatherford Technology Holdings, LLC
- Self-correcting flow in subsurface wells8 Oct 2026US 2026/0309010 A1Fervo Energy Company
- Systems and methods of prediction and management of scaling on components8 Oct 2026US 2026/0309156 A1Schlumberger Technology Corporation
- Downhole tool, well system, and method for ammonia or methanol production1 Oct 2026US 2026/0298051 A1Halliburton Energy Services.Inc.
- Well analysis applications for oil and natural gas wells with intermittent flows1 Oct 2026US 2026/0298055 A1Yottek Corp.
Most cited
By later US patents
- Method and apparatus for pumping wells338US 5,207,273 AProduction Technologies International Inc. · 1993
- Well control systems employing downhole network334US 5,959,547 ABaker Hughes Incorporated · 1999
- Petroleum well having downhole sensors, communication and power268US 6,679,332 B2Shell Oil Company · 2004
- Real-time pump optimization system267US 6,041,856 APatton Enterprises, Inc. · 2000
- Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores267US 6,167,965 ABaker Hughes Incorporated · 2001