C09K 8/03
Specific additives for general use in well-drilling compositions
C09K8/03 (Specific additives for general use in well-drilling compositions) appears on 2,116 US grants and 2,607 published applications in this corpus.
Search patents in C09K- Granted patents
- 2,116
- Published applications
- 2,607
- Assignees
- 587
- Inventors
- 3,719
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 12 | 0 |
| 1983 | 7 | 0 |
| 1984 | 19 | 0 |
| 1985 | 15 | 0 |
| 1986 | 7 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 7 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 4 |
| 2002 | 7 | 7 |
| 2003 | 10 | 13 |
| 2004 | 10 | 22 |
| 2005 | 7 | 29 |
| 2006 | 10 | 35 |
| 2007 | 25 | 35 |
| 2008 | 19 | 37 |
| 2009 | 20 | 49 |
| 2010 | 40 | 56 |
| 2011 | 32 | 62 |
| 2012 | 38 | 84 |
| 2013 | 40 | 104 |
| 2014 | 61 | 157 |
| 2015 | 60 | 143 |
| 2016 | 92 | 223 |
| 2017 | 143 | 267 |
| 2018 | 171 | 203 |
| 2019 | 195 | 195 |
| 2020 | 188 | 175 |
| 2021 | 190 | 200 |
| 2022 | 168 | 110 |
| 2023 | 154 | 122 |
| 2024 | 112 | 117 |
| 2025 | 98 | 116 |
| 2026 | 36 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Method for mitigating barite sag in water-based mud with thermochemical fluid11 Aug 2026US 12,704,032 B2King Fahd University of Petroleum and Minerals
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Method of making water-soluble polymers for use as shale encapsulators for drilling fluids24 Sep 2026US 2026/0286026 A1BASF SE
- Viscosity reducer and preparation method therefor and use thereof, and method for improving crude-oil pollution resistance of drilling fluid20 Aug 2026US 2026/0242655 A1China Petroleum & Chemical Corporation
- Nano clay mineral-based drilling mud and method for producing same20 Aug 2026US 2026/0242656 A1Industry-Academic Cooperation Foundation Gyeongsang National University
- Nanomaterial-containing friction reducer for water-based drilling fluid, and preparation method therefor13 Aug 2026US 2026/0234460 A1China University of Petroleum (East China)
Most cited
By later US patents
- 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
- Surfactant compositions and uses therefor215US 6,302,209 B1BJ Services Company · 2001
- Hydrated hydroxyethyl cellulose compositions213US 4,496,468 ANL Industries, Inc. · 1985
- Lost circulation drilling fluid166US 4,498,995 A1985