E21B 33/063
For shearing drill pipes
Official title: {for shearing drill pipes (cutting of wireline E21B29/04)}
E21B33/063 (For shearing drill pipes) appears on 360 US grants and 349 published applications in this corpus.
Search patents in E21B- Granted patents
- 360
- Published applications
- 349
- Assignees
- 115
- Inventors
- 518
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 3 |
| 2003 | 4 | 7 |
| 2004 | 4 | 3 |
| 2005 | 3 | 2 |
| 2006 | 4 | 9 |
| 2007 | 6 | 2 |
| 2008 | 3 | 7 |
| 2009 | 1 | 1 |
| 2010 | 7 | 6 |
| 2011 | 2 | 8 |
| 2012 | 5 | 24 |
| 2013 | 15 | 19 |
| 2014 | 18 | 20 |
| 2015 | 14 | 16 |
| 2016 | 21 | 33 |
| 2017 | 15 | 33 |
| 2018 | 26 | 29 |
| 2019 | 23 | 31 |
| 2020 | 24 | 16 |
| 2021 | 30 | 16 |
| 2022 | 17 | 19 |
| 2023 | 15 | 14 |
| 2024 | 13 | 14 |
| 2025 | 14 | 11 |
| 2026 | 12 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Automatic thrust activated multi-speed reduction gear and clutch system and method22 Sep 2026US 12,742,362 B2Schlumberger Technology Corporation
- Closing unit system for a blowout preventer8 Sep 2026US 12,729,597 B2Schlumberger Technology Corporation
- Apparatus for thermal activation of blow-out preventers of oil and gas wells11 Aug 2026US 12,704,038 B1Saudi Arabian Oil Company
- Energy delivery system for supplying hydraulic pressure for severing an intervention medium11 Aug 2026US 12,704,042 B2Halliburton Energy Services.Inc.
- Electrically-actuated blow-out preventer14 Jul 2026US 12,680,410 B2Schlumberger Technology Corporation
- Systems and methods for cutting coiled tubing strings at a wellsite24 Sep 2026US 2026/0286803 A1Grant Prideco, L.P.
- Intensifier ram blowout preventer20 Aug 2026US 2026/0243140 A1BOP Technologies, INC
- Blowout preventer locking system and method25 Jun 2026US 2026/0176933 A1Schlumberger Technology Corporation
- Multi-point blade and pocket blade for a shear ram in a blow-out preventer26 Mar 2026US 2026/0085590 A1Hydril USA Distribution LLC
- Automatic thrust activated multi-speed reduction gear and clutch system and method29 Jan 2026US 2026/0028890 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Subsea hydraulic choke193US 4,046,191 AExxon Production Research Company · 1977
- Marine riser well control method and apparatus160US 4,626,135 AHydril Company · 1986
- Method and apparatus for replacing BOP with gate valve121US 6,601,650 B2Worldwide Oilfield Machine, Inc. · 2003
- Ram BOP shear device92US 7,234,530 B2Hydril Company · 2007
- Position instrumented blowout preventer78US 5,320,325 AHydril Company · 1994