E21B 43/121
Lifting well fluids
Official title: {Lifting well fluids (monitoring of down-hole pump systems E21B47/008)}
E21B43/121 (Lifting well fluids) appears on 4,218 US grants and 4,189 published applications in this corpus.
Search patents in E21B- Granted patents
- 4,218
- Published applications
- 4,189
- Assignees
- 1,248
- Inventors
- 6,024
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 11 | 0 |
| 1978 | 16 | 0 |
| 1979 | 12 | 0 |
| 1980 | 18 | 0 |
| 1981 | 17 | 0 |
| 1982 | 12 | 0 |
| 1983 | 28 | 0 |
| 1984 | 18 | 0 |
| 1985 | 18 | 0 |
| 1986 | 23 | 0 |
| 1987 | 23 | 0 |
| 1988 | 26 | 0 |
| 1989 | 27 | 0 |
| 1990 | 26 | 0 |
| 1991 | 39 | 0 |
| 1992 | 32 | 0 |
| 1993 | 41 | 0 |
| 1994 | 28 | 0 |
| 1995 | 45 | 0 |
| 1996 | 40 | 0 |
| 1997 | 29 | 0 |
| 1998 | 49 | 0 |
| 1999 | 53 | 0 |
| 2000 | 74 | 0 |
| 2001 | 79 | 12 |
| 2002 | 50 | 63 |
| 2003 | 74 | 60 |
| 2004 | 43 | 59 |
| 2005 | 37 | 87 |
| 2006 | 57 | 84 |
| 2007 | 55 | 84 |
| 2008 | 71 | 106 |
| 2009 | 54 | 125 |
| 2010 | 103 | 114 |
| 2011 | 71 | 117 |
| 2012 | 105 | 120 |
| 2013 | 91 | 135 |
| 2014 | 93 | 156 |
| 2015 | 111 | 226 |
| 2016 | 123 | 245 |
| 2017 | 138 | 298 |
| 2018 | 229 | 274 |
| 2019 | 259 | 241 |
| 2020 | 281 | 281 |
| 2021 | 261 | 259 |
| 2022 | 236 | 223 |
| 2023 | 249 | 206 |
| 2024 | 237 | 256 |
| 2025 | 233 | 205 |
| 2026 | 159 | 153 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 43/128Adaptation of pump systems with down-hole electric drives1,557
- E21B 43/126Adaptations of down-hole pump systems powered by drives outside the borehole912
- E21B 43/122Gas lift696
- E21B 43/13Specially adapted to dewatering of wells of gas producing reservoirs307
- E21B 43/129Adaptations of down-hole pump systems powered by fluid supplied from outside the224
- E21B 43/124Adaptation of jet-pump systems93
Recent patents
- 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
- Tooling for encapsulated ESP stators6 Oct 2026US 12,756,256 B2Schlumberger Technology Corporation
- 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
- Well analysis applications for oil and natural gas wells with intermittent flows1 Oct 2026US 2026/0298055 A1Yottek Corp.
- Gas Lift Valve Having Ratcheting Orifice1 Oct 2026US 2026/0298056 A1Weatherford Technology Holdings, LLC
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