E21B 37/06
Methods or apparatus for cleaning boreholes or wells: using chemical means for
Official title: using chemical means for preventing or limiting {, e.g. eliminating,} the deposition of paraffins or like substances
E21B37/06 (Methods or apparatus for cleaning boreholes or wells: using chemical means for) appears on 776 US grants and 874 published applications in this corpus.
Search patents in E21B- Granted patents
- 776
- Published applications
- 874
- Assignees
- 306
- Inventors
- 1,766
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 6 | 4 |
| 2002 | 4 | 10 |
| 2003 | 9 | 10 |
| 2004 | 10 | 15 |
| 2005 | 11 | 15 |
| 2006 | 12 | 5 |
| 2007 | 7 | 12 |
| 2008 | 7 | 12 |
| 2009 | 8 | 18 |
| 2010 | 7 | 14 |
| 2011 | 11 | 23 |
| 2012 | 3 | 21 |
| 2013 | 11 | 23 |
| 2014 | 9 | 43 |
| 2015 | 20 | 41 |
| 2016 | 38 | 75 |
| 2017 | 38 | 72 |
| 2018 | 52 | 69 |
| 2019 | 54 | 51 |
| 2020 | 67 | 51 |
| 2021 | 45 | 60 |
| 2022 | 51 | 47 |
| 2023 | 55 | 51 |
| 2024 | 51 | 45 |
| 2025 | 55 | 53 |
| 2026 | 35 | 34 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of improving injection pressure and asphaltene remediation6 Oct 2026US 12,753,337 B2
- Application of organic oxidizer and enzyme combination as breaker fluid for filter cake cleanup29 Sep 2026US 12,747,385 B2Schlumberger Technology Corporation
- Corrosion-inhibiting agents for reducing dissolved oxygen concentrations within upstream oilfield systems22 Sep 2026US 12,742,111 B2Finoric, LLC
- Wellbore treatment to remove damage and increase production1 Sep 2026US 12,723,490 B2Aegis Chemical Solutions, LLC
- Extended- and multimodal-release compositions25 Aug 2026US 12,715,801 B2Finoric, LLC
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Lateral gas lift with slugging control10 Sep 2026US 2026/0266165 A1ConocoPhillips Company
- Aqueous drilling fluid for reducing bitumen accretion27 Aug 2026US 2026/0250445 A1Secure Speciality Chemicals Corp.
- Scale inhibitor composition and methods of using the same for treating scale in a wellbore20 Aug 2026US 2026/0242658 A1Saudi Arabian Oil Company
- Method for modifying the permeability of a geological formation zone20 Aug 2026US 2026/0243145 A1
Most cited
By later US patents
- Well control systems employing downhole network334US 5,959,547 ABaker Hughes Incorporated · 1999
- Control system for well stimulation apparatus with response time temperature rise used in determining heater control temperature setpoint316US 5,517,593 A1996
- Well treatment251US 5,964,291 AAEA Technology plc · 1999
- Monitoring of downhole parameters and tools utilizing fiber optics244US 6,281,489 B1Baker Hughes Incorporated · 2001
- Monitoring of downhole parameters and tools utilizing fiber optics241US 6,588,266 B2Baker Hughes Incorporated · 2003