F04B 47/12
Pumps or pumping installations specially adapted for raising fluids from great depths
Official title: having free plunger lifting the fluid to the surface
F04B47/12 (Pumps or pumping installations specially adapted for raising fluids from great depths) appears on 176 US grants and 163 published applications in this corpus.
Search patents in F04B- Granted patents
- 176
- Published applications
- 163
- Assignees
- 80
- Inventors
- 252
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 4 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 7 | 7 |
| 2007 | 2 | 1 |
| 2008 | 3 | 1 |
| 2009 | 2 | 4 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 3 | 3 |
| 2013 | 3 | 1 |
| 2014 | 2 | 7 |
| 2015 | 3 | 6 |
| 2016 | 2 | 5 |
| 2017 | 4 | 13 |
| 2018 | 10 | 10 |
| 2019 | 7 | 13 |
| 2020 | 14 | 12 |
| 2021 | 11 | 16 |
| 2022 | 16 | 12 |
| 2023 | 13 | 10 |
| 2024 | 8 | 15 |
| 2025 | 11 | 9 |
| 2026 | 8 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dart and clutch assembly15 Sep 2026US 12,735,962 B2Epic Lift Systems
- Production method with a plunger lift system14 Jul 2026US 12,680,427 B2Saudi Arabian Oil Company
- Unibody bypass plunger and valve cage14 Jul 2026US 12,680,430 B2Flowco MasterCo LLC
- Flow restrictor method and apparatus28 Apr 2026US 12,612,841 B2Epic Lift Systems
- Dart and clutch assembly28 Apr 2026US 12,612,845 B2Epic Lift Systems
- Plunger lift with an adjustable and variable clutch1 Oct 2026US 2026/0298220 A1Endurance Lift Solutions, LLC
- Unibody bypass plunger and valve cage24 Sep 2026US 2026/0286816 A1Flowco MasterCo LLC
- Systems and methods for remote monitoring of oil and gas plunger lift systems27 Aug 2026US 2026/0251528 A1Rsr Equipment LLC
- Plunger with plunger ball retention mechanism for plunger lift applications28 May 2026US 2026/0146516 A1ChampionX LLC
- Improved dart and clutch assembly26 Feb 2026US 2026/0055685 A1Epic Lift Systems
Most cited
By later US patents
- Gas and oil well interface tool and intelligent controller142US 5,253,713 ABelden & Blake Corporation · 1993
- Downhole gas separator135US 5,333,684 A1994
- Valveless free plunger and system for well pumping130US 4,502,843 ANoodle Corporation · 1985
- Plunger lift method and apparatus82US 6,467,541 B12002
- Gas-pressurized lubricator and method80US 7,337,854 B2Weatherford/Lamb, Inc. · 2008