C09K 8/32
Non-aqueous well-drilling compositions
Official title: Non-aqueous well-drilling compositions, e.g. oil-based
C09K8/32 (Non-aqueous well-drilling compositions) appears on 1,119 US grants and 1,102 published applications in this corpus.
Search patents in C09K- Granted patents
- 1,119
- Published applications
- 1,102
- Assignees
- 327
- Inventors
- 1,737
- Latest grant
- 2 Jun 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 | 1 | 0 |
| 1983 | 8 | 0 |
| 1984 | 18 | 0 |
| 1985 | 13 | 0 |
| 1986 | 6 | 0 |
| 1987 | 13 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 20 | 0 |
| 1995 | 15 | 0 |
| 1996 | 10 | 0 |
| 1997 | 19 | 0 |
| 1998 | 16 | 0 |
| 1999 | 22 | 0 |
| 2000 | 20 | 0 |
| 2001 | 16 | 5 |
| 2002 | 12 | 6 |
| 2003 | 15 | 36 |
| 2004 | 18 | 36 |
| 2005 | 10 | 43 |
| 2006 | 17 | 31 |
| 2007 | 30 | 49 |
| 2008 | 26 | 30 |
| 2009 | 27 | 25 |
| 2010 | 40 | 40 |
| 2011 | 30 | 41 |
| 2012 | 29 | 55 |
| 2013 | 28 | 38 |
| 2014 | 29 | 55 |
| 2015 | 28 | 65 |
| 2016 | 31 | 55 |
| 2017 | 41 | 79 |
| 2018 | 50 | 77 |
| 2019 | 78 | 89 |
| 2020 | 86 | 71 |
| 2021 | 68 | 50 |
| 2022 | 60 | 31 |
| 2023 | 47 | 35 |
| 2024 | 30 | 18 |
| 2025 | 26 | 25 |
| 2026 | 7 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Manufacturing method for inverse emulsion polymer2 Jun 2026US 12,643,961 B2TouGas Holding GmbH
- Method of drilling wellbore into subterranean geological formation26 May 2026US 12,637,606 B1King Fahd University of Petroleum and Minerals
- Pourable wetting agents and methods associated therewith12 May 2026US 12,624,272 B2Saudi Arabian Oil Company
- Low density oil-based wellbore fluids and methods thereof7 Apr 2026US 12,595,404 B2Schlumberger Technology Corporation
- Polyhedral oligomeric silsesquioxane as rheology booster for invert emulsion oil-based mud10 Mar 2026US 12,570,888 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
- Emulsifier and preparation method therefor, and oil-based drilling fluid1 Oct 2026US 2026/0297414 A1China Petroleum & Chemical Corporation
- Emulsifiers, drilling fluids, and methods of making and using the same24 Sep 2026US 2026/0286207 A1
- Method of using inverse emulsion polymer17 Sep 2026US 2026/0275003 A1TouGas Holding GmbH
- Plug barrier material27 Aug 2026US 2026/0251034 A1Isol8 (Holdings) Limited
Most cited
By later US patents
- Foaming surfactant compositions383US 4,565,647 AThe Procter & Gamble Company · 1986
- 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
- Dilution of drilling fluid in forming cement slurries191US 5,314,022 AShell Oil Company · 1994
- Solvent soaps and methods employing same152US 5,723,423 AUnion Oil Company of California, dba UNOCAL · 1998
- Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell137US 7,066,284 B2Halliburton Energy Services.Inc. · 2006