E21B 36/008
Heating, cooling or insulating arrangements for boreholes or wells: using chemical heat
Official title: {using chemical heat generating means}
E21B36/008 (Heating, cooling or insulating arrangements for boreholes or wells: using chemical heat) appears on 171 US grants and 203 published applications in this corpus.
Search patents in E21B- Granted patents
- 171
- Published applications
- 203
- Assignees
- 51
- Inventors
- 268
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 7 |
| 2005 | 0 | 1 |
| 2006 | 2 | 4 |
| 2007 | 3 | 0 |
| 2008 | 0 | 6 |
| 2009 | 2 | 3 |
| 2010 | 2 | 3 |
| 2011 | 3 | 6 |
| 2012 | 5 | 1 |
| 2013 | 1 | 8 |
| 2014 | 7 | 7 |
| 2015 | 2 | 18 |
| 2016 | 15 | 8 |
| 2017 | 9 | 13 |
| 2018 | 7 | 10 |
| 2019 | 14 | 17 |
| 2020 | 7 | 9 |
| 2021 | 12 | 13 |
| 2022 | 18 | 15 |
| 2023 | 12 | 13 |
| 2024 | 12 | 20 |
| 2025 | 20 | 14 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Extraction and integration of waste heat from enhanced geologic hydrogen production25 Aug 2026US 12,716,339 B2Koloma, Inc.
- Plug and abandon with fusible alloy seal14 Jul 2026US 12,680,412 B2Halliburton Energy Services.Inc.
- Annular barrier21 Apr 2026US 12,607,089 B2Welltec Manufacturing Center Completions ApS
- Method for providing a permanent barrier in a well24 Feb 2026US 12,560,048 B2Interwell P&A AS
- Systems and methods of initiating energetic reactions for reservoir stimulation24 Feb 2026US 12,560,066 B2Schlumberger Technology Corporation
- Extraction and integration of waste heat from enhanced geologic hydrogen production13 Aug 2026US 2026/0235020 A1Koloma, Inc.
- Downhole tool employing a radioisotope heater unit or radioisotope generator to increase or decrease a rate of reaction of a hydrolysis of an expandable metal9 Jul 2026US 2026/0193961 A1Halliburton Energy Services.Inc.
- A chemical reaction heat source composition for use in downhole operations and associated apparatus and methods11 Jun 2026US 2026/0160152 A1BiSN Tec Ltd
- Pre-positioning a meltable seal for plug and abandonment26 Feb 2026US 2026/0055681 A1Halliburton Energy Services.Inc.
- Apparatus and methods for forming formation-to-formation seals in a wellbore22 Jan 2026US 2026/0022618 A1Robertson Intellectual Properties, LLC
Most cited
By later US patents
- Staged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation259US 7,073,578 B2Shell Oil Company · 2006
- Sealing well casings248US 5,833,001 ASchlumberger Technology Corporation · 1998
- In situ soil decontamination method and apparatus226US 5,011,329 AHrubetz Exploration Company · 1991
- Inhibiting wellbore deformation during in situ thermal processing of a hydrocarbon containing formation210US 7,219,734 B2Shell Oil Company · 2007
- Conductor-in-conduit temperature limited heaters196US 7,121,341 B2Shell Oil Company · 2006