E21B 21/065
Separating solids from drilling fluids
Official title: {Separating solids from drilling fluids}
E21B21/065 (Separating solids from drilling fluids) appears on 964 US grants and 981 published applications in this corpus.
Search patents in E21B- Granted patents
- 964
- Published applications
- 981
- Assignees
- 399
- Inventors
- 1,485
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 9 | 0 |
| 1981 | 5 | 0 |
| 1982 | 11 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 9 | 0 |
| 1993 | 1 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 3 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 16 | 0 |
| 2001 | 25 | 4 |
| 2002 | 19 | 16 |
| 2003 | 19 | 19 |
| 2004 | 13 | 22 |
| 2005 | 13 | 21 |
| 2006 | 12 | 23 |
| 2007 | 12 | 37 |
| 2008 | 19 | 39 |
| 2009 | 19 | 28 |
| 2010 | 23 | 25 |
| 2011 | 22 | 28 |
| 2012 | 21 | 28 |
| 2013 | 22 | 39 |
| 2014 | 29 | 55 |
| 2015 | 27 | 42 |
| 2016 | 34 | 53 |
| 2017 | 36 | 80 |
| 2018 | 37 | 58 |
| 2019 | 55 | 60 |
| 2020 | 76 | 66 |
| 2021 | 66 | 67 |
| 2022 | 43 | 36 |
| 2023 | 59 | 37 |
| 2024 | 46 | 46 |
| 2025 | 37 | 28 |
| 2026 | 24 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for processing a slurry29 Sep 2026US 12,747,645 B2Flowback Fluids LLC
- Rock straining system15 Sep 2026US 12,735,950 B2Proppant Express Solutions, LLC
- Method and apparatus for automatic drill out8 Sep 2026US 12,729,591 B2Tetra Technologies, Inc.
- Drilling fluid conditioning systems and methods1 Sep 2026US 12,723,478 B2National Oilwell Varco, L. P.
- On surface gamma ray sensor for calibrating cuttings depth in underbalanced coiled tubing drilling rigs25 Aug 2026US 12,716,353 B2Saudi Arabian Oil Company
- Device and method for automatically recovering logging data storage1 Oct 2026US 2026/0295480 A1China Petroleum & Chemical Corporation
- Water management system1 Oct 2026US 2026/0298042 A1Hilti Aktiengesellschaft
- Cleaning devices and operations for downhole separation in a well17 Sep 2026US 2026/0275820 A1Halliburton Energy Services.Inc.
- Aqueous drilling fluid for reducing bitumen accretion27 Aug 2026US 2026/0250445 A1Secure Speciality Chemicals Corp.
- A screen assembly for use in a shale shaker20 Aug 2026US 2026/0243138 A1Rollman Holding B.V.
Most cited
By later US patents
- Cuttings injection system and method216US 6,321,860 B12001
- Solvent soaps and methods employing same152US 5,723,423 AUnion Oil Company of California, dba UNOCAL · 1998
- Disposal and reclamation of drilling wastes139US 4,942,929 AAtlantic Richfield Company · 1990
- Drilling fluid remediation system113US 5,570,749 AOnsite Technology, L.L.C. · 1996
- Apparatus for washing drill cuttings103US 4,546,783 AFlo Trend Shares, Inc. · 1985