C09K 8/04
Aqueous well-drilling compositions
C09K8/04 (Aqueous well-drilling compositions) appears on 2,465 US grants and 1,847 published applications in this corpus.
Search patents in C09K- Granted patents
- 2,465
- Published applications
- 1,847
- Assignees
- 611
- Inventors
- 3,358
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 30 | 0 |
| 1977 | 18 | 0 |
| 1978 | 15 | 0 |
| 1979 | 15 | 0 |
| 1980 | 25 | 0 |
| 1981 | 24 | 0 |
| 1982 | 30 | 0 |
| 1983 | 32 | 0 |
| 1984 | 58 | 0 |
| 1985 | 64 | 0 |
| 1986 | 51 | 0 |
| 1987 | 45 | 0 |
| 1988 | 46 | 0 |
| 1989 | 33 | 0 |
| 1990 | 28 | 0 |
| 1991 | 40 | 0 |
| 1992 | 34 | 0 |
| 1993 | 34 | 0 |
| 1994 | 49 | 0 |
| 1995 | 34 | 0 |
| 1996 | 29 | 0 |
| 1997 | 54 | 0 |
| 1998 | 49 | 0 |
| 1999 | 31 | 0 |
| 2000 | 46 | 0 |
| 2001 | 37 | 11 |
| 2002 | 35 | 23 |
| 2003 | 28 | 66 |
| 2004 | 48 | 75 |
| 2005 | 26 | 62 |
| 2006 | 55 | 68 |
| 2007 | 42 | 57 |
| 2008 | 29 | 47 |
| 2009 | 43 | 53 |
| 2010 | 45 | 66 |
| 2011 | 51 | 61 |
| 2012 | 32 | 71 |
| 2013 | 47 | 59 |
| 2014 | 56 | 92 |
| 2015 | 55 | 91 |
| 2016 | 49 | 91 |
| 2017 | 76 | 104 |
| 2018 | 98 | 129 |
| 2019 | 119 | 129 |
| 2020 | 120 | 115 |
| 2021 | 122 | 94 |
| 2022 | 93 | 64 |
| 2023 | 81 | 63 |
| 2024 | 77 | 75 |
| 2025 | 64 | 53 |
| 2026 | 23 | 28 |
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
- Method for mitigating barite sag in water-based mud with thermochemical fluid11 Aug 2026US 12,704,032 B2King Fahd University of Petroleum and Minerals
- Fluid loss control additives for drilling fluids14 Jul 2026US 12,680,400 B2Halliburton Energy Services.Inc.
- Downhole methods and compositions used in such2 Jun 2026US 12,644,040 B2Dorf Ketal Chemicals Fze
- Downhole methods and compositions used in such2 Jun 2026US 12,644,041 B2Dorf Ketal Chemicals Fze
- Wellbore drilling compositions1 Oct 2026US 2026/0297413 A1Chevron Phillips Chemical Company LP
- High temperature universal fluids and methods and systems related thereto1 Oct 2026US 2026/0297415 A1Aramco Services Company
- Lignin-based compositions and related methods10 Sep 2026US 2026/0265600 A1LignoSol IP Limited
- Aqueous drilling fluid for reducing bitumen accretion27 Aug 2026US 2026/0250445 A1Secure Speciality Chemicals Corp.
- Method and system for enhancing subsurface permeability via electromagnetic fields and electromagnetically responsive particles27 Aug 2026US 2026/0251044 A1
Most cited
By later US patents
- Viscoelastic surfactant fluids and related methods of use217US 6,258,859 B1Rhodia Inc. · 2001
- Well treatment process210US 4,957,165 AConoco Inc. · 1990
- Well drilling and servicing fluids and methods of removing filter cake deposited thereby200US 6,494,263 B2Halliburton Energy Services.Inc. · 2002
- Dilution of drilling fluid in forming cement slurries191US 5,314,022 AShell Oil Company · 1994
- Methods of consolidating formations or forming chemical casing or both while drilling188US 6,702,044 B2Halliburton Energy Services.Inc. · 2004