E21B 27/00
Containers for collecting or depositing substances in boreholes or wells
Official title: Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, {baskets or buckets} for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
E21B27/00 (Containers for collecting or depositing substances in boreholes or wells) appears on 569 US grants and 509 published applications in this corpus.
Search patents in E21B- Granted patents
- 569
- Published applications
- 509
- Assignees
- 220
- Inventors
- 1,027
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 10 | 0 |
| 2002 | 6 | 6 |
| 2003 | 15 | 13 |
| 2004 | 9 | 10 |
| 2005 | 12 | 7 |
| 2006 | 5 | 8 |
| 2007 | 6 | 4 |
| 2008 | 5 | 13 |
| 2009 | 12 | 18 |
| 2010 | 13 | 16 |
| 2011 | 9 | 19 |
| 2012 | 19 | 26 |
| 2013 | 13 | 16 |
| 2014 | 16 | 33 |
| 2015 | 27 | 27 |
| 2016 | 25 | 20 |
| 2017 | 13 | 27 |
| 2018 | 25 | 24 |
| 2019 | 27 | 35 |
| 2020 | 35 | 20 |
| 2021 | 18 | 34 |
| 2022 | 29 | 34 |
| 2023 | 26 | 27 |
| 2024 | 32 | 26 |
| 2025 | 31 | 26 |
| 2026 | 15 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Payload deployment tools and methods of using same25 Aug 2026US 12,716,324 B2
- Dual flexible shaft apparatus for improved downhole operations30 Jun 2026US 12,669,025 B2Schlumberger Technology Corporation
- Vibratory grouting rod with drilling and vibrating functions and method for using the same16 Jun 2026US 12,655,598 B2
- Milling and debris collecting with multiphase vacuum pump2 Jun 2026US 12,644,359 B2Schlumberger Technology Corporation
- Methods of swabbing liquid loaded wells, and killing wells, with the use of compression pumps, regulators and filtration techniques2 Jun 2026US 12,644,374 B2Zenrg Services, LLC
- Apparatus for recovering debris from a wellbore8 Oct 2026US 2026/0308994 A1Grant Prideco, L.P.
- Subterranean solids fallback protection device1 Oct 2026US 2026/0298065 A1Fallback LLC
- Downhole solids management device10 Sep 2026US 2026/0266168 A1Fallback LLC
- Method and tool for cementing wellbore13 Aug 2026US 2026/0235012 A1Baker Hughes Oilfield Operations LLC
- Wireline cleaning tool13 Aug 2026US 2026/0235016 A1Welltec A/S
Most cited
By later US patents
- Apparatus for removal of milling debris142US 6,276,452 B1Baker Hughes Incorporated · 2001
- Method and apparatus for placing buoyant ball sealers132US 4,187,909 AExxon Production Research Company · 1980
- Early evaluation system with pump and method of servicing a well128US 5,799,733 AHalliburton Energy Services.Inc. · 1998
- Junk bailer apparatus for use in retrieving debris from a well bore of an oil and gas well125US 5,944,100 ABaker Hughes Incorporated · 1999
- Method for actuating a tool in a well at a given depth and tool allowing the method to be implemented109US 4,640,354 ASchlumberger Technology Corporation · 1987