E21B 36/003
Insulating arrangements
Official title: {Insulating arrangements}
E21B36/003 (Insulating arrangements) appears on 268 US grants and 187 published applications in this corpus.
Search patents in E21B- Granted patents
- 268
- Published applications
- 187
- Assignees
- 131
- Inventors
- 524
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 3 | 0 |
| 1983 | 10 | 0 |
| 1984 | 13 | 0 |
| 1985 | 14 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 2 |
| 2003 | 3 | 3 |
| 2004 | 2 | 5 |
| 2005 | 4 | 5 |
| 2006 | 3 | 3 |
| 2007 | 1 | 5 |
| 2008 | 4 | 9 |
| 2009 | 3 | 7 |
| 2010 | 8 | 6 |
| 2011 | 3 | 6 |
| 2012 | 7 | 7 |
| 2013 | 4 | 6 |
| 2014 | 6 | 4 |
| 2015 | 9 | 16 |
| 2016 | 5 | 10 |
| 2017 | 5 | 12 |
| 2018 | 7 | 11 |
| 2019 | 15 | 9 |
| 2020 | 9 | 14 |
| 2021 | 11 | 7 |
| 2022 | 8 | 6 |
| 2023 | 8 | 7 |
| 2024 | 10 | 14 |
| 2025 | 10 | 8 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods and devices for retaining conveyed heat up a wellbore18 Aug 2026US 12,709,962 B2Gradient Geothermal Inc.
- Tubular for downhole use2 Jun 2026US 12,644,367 B2Pro-Pipe Service & Sales Ltd.
- Forming high-efficiency geothermal wellbores12 May 2026US 12,624,865 B2Eavor Technologies Inc.
- Subsea heat bank with PCM heat storing member14 Apr 2026US 12,601,241 B2Baker Hughes Energy Technology UK Limited
- Systems and methods for managing temperatures in wellbores3 Feb 2026US 12,540,530 B2Helmerich & Payne Technologies, LLC
- Temperature management of downhole tools8 Oct 2026US 2026/0309023 A1Eavor Technologies Inc.
- Nested thermally insulated containers for improved heat transfer reduction24 Sep 2026US 2026/0285579 A1Hephae Energy Technology
- Porous material for wellbore thermal insulation in drilling and its preparation method and application11 Jun 2026US 2026/0159745 A1China Univesity of Petroleum (East China)
- Systems and methods for downhole power generation5 Mar 2026US 2026/0063017 A1Helmerich & Payne Technologies, LLC
- Methods and devices for retaining conveyed heat up a wellbore15 Jan 2026US 2026/0015921 A1Gradient Geothermal Inc.
Most cited
By later US patents
- Method and apparatus for isolating and treating subsurface stratas240US 4,125,159 A1978
- Method and apparatus for treatment of subsurface formations233US 4,474,238 APhillips Petroleum Company · 1984
- Double walled insulated tubing and method of installing same121US 5,862,866 ARoxwell International Limited · 1999
- High temperature insulated casing118US 4,415,184 AGeneral Electric Company · 1983
- Protective sheath for high temperature process wells115US 4,421,169 AAtlantic Richfield Company · 1983