E21B 33/1204
Permanent
Official title: {permanent; drillable}
E21B33/1204 (Permanent) appears on 214 US grants and 211 published applications in this corpus.
Search patents in E21B- Granted patents
- 214
- Published applications
- 211
- Assignees
- 101
- Inventors
- 350
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 3 | 5 |
| 2004 | 5 | 3 |
| 2005 | 1 | 4 |
| 2006 | 3 | 1 |
| 2007 | 1 | 3 |
| 2008 | 2 | 1 |
| 2009 | 2 | 6 |
| 2010 | 1 | 0 |
| 2011 | 5 | 8 |
| 2012 | 1 | 13 |
| 2013 | 6 | 6 |
| 2014 | 4 | 14 |
| 2015 | 12 | 15 |
| 2016 | 11 | 12 |
| 2017 | 11 | 10 |
| 2018 | 13 | 22 |
| 2019 | 19 | 20 |
| 2020 | 23 | 13 |
| 2021 | 11 | 12 |
| 2022 | 16 | 17 |
| 2023 | 9 | 5 |
| 2024 | 8 | 8 |
| 2025 | 11 | 7 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Plug and abandon with fusible alloy seal14 Jul 2026US 12,680,412 B2Halliburton Energy Services.Inc.
- Drillable seat for multi-stage tools16 Jun 2026US 12,655,709 B1Halliburton Energy Services.Inc.
- Expanding metal for plug and abandonment12 May 2026US 12,624,611 B2Halliburton Energy Services.Inc.
- Method for providing a permanent barrier in a well24 Feb 2026US 12,560,048 B2Interwell P&A AS
- Hybrid dissolvable plugs for sealing downhole casing strings3 Feb 2026US 12,540,525 B2G&H Diversified Manufacturing LP
- Expanding metal for plug and abandonment20 Aug 2026US 2026/0243144 A1Halliburton Energy Services.Inc.
- Hybrid dissolvable plugs for sealing downhole casing strings14 May 2026US 2026/0132696 A1G&H Diversified Manufacturing LP
- Method to control a well12 Feb 2026US 2026/0043306 A1Italmatch Chemicals Gb Limited
- Shear Resistant Swellable Packers18 Dec 2025US 2025/0382853 A1Halliburton Energy Services.Inc.
- Hybrid dissolvable plug with improved drillability20 Nov 2025US 2025/0354452 A1G&H Diversified Manufacturing LP
Most cited
By later US patents
- Chip resistant buttons for downhole tools having slip elements243US 5,984,007 AHalliburton Energy Services.Inc. · 1999
- Downhole tool apparatus with non-metallic components and methods of drilling thereof241US 5,224,540 AHalliburton Company · 1993
- Downhole tool apparatus with non-metallic components and methods of drilling thereof218US 5,271,468 AHalliburton Company · 1993
- Drillable bridge plug210US 4,784,226 AArrow Oil Tools, Inc. · 1988
- Removable non-metallic bridge plug or packer196US 6,167,963 ABaker Hughes Incorporated · 2001