C09K 8/02
Well-drilling compositions
C09K8/02 (Well-drilling compositions) appears on 4,817 US grants and 4,510 published applications in this corpus.
Search patents in C09K- Granted patents
- 4,817
- Published applications
- 4,510
- Assignees
- 1,029
- Inventors
- 6,451
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 35 | 0 |
| 1977 | 23 | 0 |
| 1978 | 26 | 0 |
| 1979 | 17 | 0 |
| 1980 | 33 | 0 |
| 1981 | 39 | 0 |
| 1982 | 41 | 0 |
| 1983 | 43 | 0 |
| 1984 | 99 | 0 |
| 1985 | 93 | 0 |
| 1986 | 66 | 0 |
| 1987 | 65 | 0 |
| 1988 | 61 | 0 |
| 1989 | 45 | 0 |
| 1990 | 42 | 0 |
| 1991 | 50 | 0 |
| 1992 | 51 | 0 |
| 1993 | 52 | 0 |
| 1994 | 67 | 0 |
| 1995 | 48 | 0 |
| 1996 | 43 | 0 |
| 1997 | 72 | 0 |
| 1998 | 68 | 0 |
| 1999 | 53 | 0 |
| 2000 | 63 | 0 |
| 2001 | 60 | 19 |
| 2002 | 53 | 39 |
| 2003 | 48 | 98 |
| 2004 | 72 | 113 |
| 2005 | 39 | 113 |
| 2006 | 74 | 114 |
| 2007 | 80 | 109 |
| 2008 | 60 | 98 |
| 2009 | 72 | 105 |
| 2010 | 99 | 138 |
| 2011 | 90 | 145 |
| 2012 | 77 | 173 |
| 2013 | 94 | 178 |
| 2014 | 124 | 248 |
| 2015 | 127 | 254 |
| 2016 | 144 | 303 |
| 2017 | 207 | 356 |
| 2018 | 264 | 312 |
| 2019 | 305 | 311 |
| 2020 | 291 | 275 |
| 2021 | 294 | 274 |
| 2022 | 246 | 160 |
| 2023 | 222 | 173 |
| 2024 | 175 | 173 |
| 2025 | 154 | 156 |
| 2026 | 51 | 73 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Shale hydration inhibitors and subterranean treatment fluids containing them29 Sep 2026US 12,747,383 B2Lamberti SPA
- Industrial fluids with dilution resistance and tunable viscosity, and methods of making and using industrial fluids25 Aug 2026US 12,715,810 B2Blue Nose Technologies LLC
- Systems and methods for wellbore drilling utilizing a thermochemical sulfate reduction (TSR) proxy25 Aug 2026US 12,716,349 B2Saudi Arabian Oil Company
- Compositions and methods for breaking foams and emulsions11 Aug 2026US 12,703,822 B2Chevron U.S.A.Inc.
- Methods and compositions for volcanic ash lost circulation materials11 Aug 2026US 12,704,031 B2Saudi Arabian Oil Company
- Drilling mud and method of making drilling mud having an unrefined petroleum product8 Oct 2026US 2026/0308439 A14 Oaks Solutions LLC
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Wellbore drilling compositions1 Oct 2026US 2026/0297413 A1Chevron Phillips Chemical Company LP
- Emulsifier and preparation method therefor, and oil-based drilling fluid1 Oct 2026US 2026/0297414 A1China Petroleum & Chemical Corporation
- High temperature universal fluids and methods and systems related thereto1 Oct 2026US 2026/0297415 A1Aramco Services Company
Most cited
By later US patents
- Foaming surfactant compositions383US 4,565,647 AThe Procter & Gamble Company · 1986
- Methods of sealing subterranean zones265US 5,913,364 AHalliburton Energy Services.Inc. · 1999
- Methods of sealing subterranean zones247US 6,167,967 AHalliburton Energy Services.Inc. · 2001
- Memory controller for a microprocessor for detecting a failure of speculation on the physical nature of a component being addressed230US 5,832,205 ATransmeta Corporation · 1998
- Viscoelastic surfactant fluids and related methods of use217US 6,258,859 B1Rhodia Inc. · 2001