C09K 2208/02
Spotting, i.e. using additives for releasing a stuck drill
C09K2208/02 (Spotting, i.e. using additives for releasing a stuck drill) appears on 60 US grants and 47 published applications in this corpus.
Search patents in C09K- Granted patents
- 60
- Published applications
- 47
- Assignees
- 27
- Inventors
- 140
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 4 |
| 2011 | 1 | 1 |
| 2012 | 4 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 2 | 9 |
| 2017 | 6 | 13 |
| 2018 | 2 | 1 |
| 2019 | 3 | 2 |
| 2020 | 4 | 2 |
| 2021 | 3 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods for freeing differentially stuck pipes12 May 2026US 12,624,271 B2Saudi Arabian Oil Company
- Well conditioning method for wireline logging using dedicated aqueous based drilling fluid composition29 Oct 2024US 12,129,423 B2Petroleo Brasileiro S.A. - Petrobras
- Drilling fluid lubricant and preparation method and use thereof31 Jan 2023US 11,566,156 B2China University of Petroleum-Beijing
- Terpene-based spotting fluid compositions for differential sticking6 Sep 2022US 11,434,408 B2Saudi Arabian Oil Company
- Clay stabilizers27 Apr 2021US 10,988,657 B2Halliburton Energy Services.Inc.
- Methods for freeing differentially stuck pipes25 Dec 2025US 2025/0388800 A1Saudi Arabian Oil Company
- Well conditioning method for wireline logging using dedicated aqueous based drilling fluid composition6 Apr 2023US 2023/0104709 A1Petroleo Brasileiro S.A. - Petrobras
- Terpene-Based Spotting Fluid Compositions for Differential Sticking4 Nov 2021US 2021/0340425 A1Saudi Arabian Oil Company
- Drilling fluid lubricant and preparation method and use thereof25 Feb 2021US 2021/0054254 A1China University of Petroleum-Beijing
- Alkyl ester spotting fluid compositions for differential sticking20 Aug 2020US 2020/0263073 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Method of releasing stuck pipe or tools and spotting fluids therefor107US 6,148,917 AActisystems, Inc. · 2000
- Oil based synthetic hydrocarbon drilling fluid100US 5,189,012 AM-I Drilling Fluids Company · 1993
- Aphron-containing well drilling and servicing fluids of enhanced stability84US 6,123,159 AActisystems, Inc. · 2000
- Methods of drilling well boreholes and compositions used therein61US 5,260,268 AThe Lubrizol Corporation · 1993
- Aphron-containing well drilling and servicing fluids of enhanced stability60US 6,422,326 B1Actisystems, Inc. · 2002