E21B 21/01
Arrangements for handling drilling fluids or cuttings outside the borehole
Official title: Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
E21B21/01 (Arrangements for handling drilling fluids or cuttings outside the borehole) appears on 711 US grants and 694 published applications in this corpus.
Search patents in E21B- Granted patents
- 711
- Published applications
- 694
- Assignees
- 304
- Inventors
- 1,337
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 1 |
| 2002 | 9 | 14 |
| 2003 | 10 | 11 |
| 2004 | 9 | 14 |
| 2005 | 4 | 9 |
| 2006 | 15 | 10 |
| 2007 | 12 | 13 |
| 2008 | 9 | 14 |
| 2009 | 8 | 25 |
| 2010 | 17 | 27 |
| 2011 | 17 | 18 |
| 2012 | 20 | 17 |
| 2013 | 18 | 31 |
| 2014 | 28 | 47 |
| 2015 | 21 | 39 |
| 2016 | 38 | 49 |
| 2017 | 30 | 54 |
| 2018 | 38 | 43 |
| 2019 | 46 | 32 |
| 2020 | 45 | 39 |
| 2021 | 40 | 37 |
| 2022 | 38 | 39 |
| 2023 | 38 | 40 |
| 2024 | 37 | 28 |
| 2025 | 32 | 18 |
| 2026 | 13 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for cleaning and inspecting oil well drilling mud flow lines25 Aug 2026US 12,715,025 B1Tri-State Environmental, LLC
- Fasteners for an underwater drilling assembly18 Aug 2026US 12,709,366 B2Resolve Marine Group, Inc.
- Sampling pipe of a sampling arrangement21 Jul 2026US 12,687,077 B2Erimek Oy
- Integration of a finite element geomechanics model and cuttings return image processing techniques2 Jun 2026US 12,645,009 B2Saudi Arabian Oil Company
- System pulsation dampener device(s)26 May 2026US 12,638,119 B2Performance Pulsation Control, Inc.
- Riser-less managed pressure drilling with subsea fluid handling1 Oct 2026US 2026/0298039 A1
- Flow conditioning device for hydraulic fracturing systems and related methods1 Oct 2026US 2026/0298040 A1Scout Surface Solutions LLC
- Collection device for corner regions1 Oct 2026US 2026/0298041 A1Hilti Aktiengesellschaft
- System for collecting drilling slurry10 Sep 2026US 2026/0266147 A1Hilti Aktiengesellschaft
- An extensible tubing and a method of facilitating transfer of fluid27 Aug 2026US 2026/0251026 A1MH Tech AS
Most cited
By later US patents
- Circulation tool193US 6,253,861 B1Specialised Petroleum Services Limited · 2001
- Casing circulator and method160US 5,191,939 ATam International, Inc. · 1993
- Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing160US 5,735,348 AFrank's International, LLC · 1998
- Offshore drilling system154US 6,325,159 B1Hydril Company · 2001
- Subsea mud pump with reduced pulsation145US 6,102,673 AHydril Company · 2000