B01D 2221/04
Separation devices for treating liquids from earth drilling, mining
B01D2221/04 (Separation devices for treating liquids from earth drilling, mining) appears on 325 US grants and 322 published applications in this corpus.
Search patents in B01D- Granted patents
- 325
- Published applications
- 322
- Assignees
- 219
- Inventors
- 662
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 1 | 0 |
| 1996 | 9 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 10 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 6 |
| 2003 | 6 | 5 |
| 2004 | 2 | 7 |
| 2005 | 3 | 9 |
| 2006 | 9 | 8 |
| 2007 | 3 | 8 |
| 2008 | 6 | 6 |
| 2009 | 7 | 9 |
| 2010 | 1 | 8 |
| 2011 | 6 | 12 |
| 2012 | 6 | 16 |
| 2013 | 15 | 25 |
| 2014 | 11 | 18 |
| 2015 | 12 | 14 |
| 2016 | 13 | 8 |
| 2017 | 14 | 10 |
| 2018 | 9 | 13 |
| 2019 | 15 | 19 |
| 2020 | 13 | 26 |
| 2021 | 28 | 26 |
| 2022 | 17 | 25 |
| 2023 | 20 | 17 |
| 2024 | 15 | 11 |
| 2025 | 6 | 11 |
| 2026 | 10 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Produced water degassing using ejector6 Oct 2026US 12,753,686 B1Saudi Arabian Oil Company
- Cyclonic solids removal unit for downhole oil-water separation (DOWS)21 Jul 2026US 12,687,098 B2Halliburton Energy Services.Inc.
- Sand and solids bypass separator14 Jul 2026US 12,680,439 B2
- Separator system and method19 May 2026US 12,631,076 B2
- Zero liquid discharge water management system31 Mar 2026US 12,590,017 B2Saudi Arabian Oil Company
- Method for treating a suspension of solid particles in water using a polymer in a crystalline form of 2-acrylamido-2-methylpropanesulphonic acid sodium salt27 Aug 2026US 2026/0250162 A1Snf Group
- Storm water oil recovery system23 Jul 2026US 2026/0208072 A1Saudi Arabian Oil Company
- Petroleum self-cleaning filtration device and composite pumping joint11 Jun 2026US 2026/0158422 A1Shaanxi Yinhe Petroleum Engineering Technology Services Ltd.
- Apparatus and method for harnessing energy from a wellbore to perform multiple functions while reducing emissions4 Jun 2026US 2026/0153020 A1CNX Resources Corporation
- Separator monitoring and control15 Jan 2026US 2026/0014499 A1National Oilwell Varco, L. P.
Most cited
By later US patents
- Drilling mud cleaning method and apparatus109US 4,634,535 A1987
- Apparatus for washing drill cuttings103US 4,546,783 AFlo Trend Shares, Inc. · 1985
- Apparatus and method for separation of solids from liquid82US 5,814,230 A1998
- Method for separating components in well fluids77US 5,928,519 A1999
- System and method for separating solids from a fluid stream71US 6,506,310 B2DEL Corporation · 2003