C09K 8/42
Compositions for cementing
Official title: Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50)
C09K8/42 (Compositions for cementing) appears on 2,738 US grants and 2,686 published applications in this corpus.
Search patents in C09K- Granted patents
- 2,738
- Published applications
- 2,686
- Assignees
- 549
- Inventors
- 3,459
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 14 | 0 |
| 1978 | 14 | 0 |
| 1979 | 5 | 0 |
| 1980 | 12 | 0 |
| 1981 | 11 | 0 |
| 1982 | 9 | 0 |
| 1983 | 13 | 0 |
| 1984 | 25 | 0 |
| 1985 | 18 | 0 |
| 1986 | 17 | 0 |
| 1987 | 27 | 0 |
| 1988 | 17 | 0 |
| 1989 | 14 | 0 |
| 1990 | 19 | 0 |
| 1991 | 20 | 0 |
| 1992 | 28 | 0 |
| 1993 | 28 | 0 |
| 1994 | 65 | 0 |
| 1995 | 28 | 0 |
| 1996 | 27 | 0 |
| 1997 | 10 | 0 |
| 1998 | 12 | 0 |
| 1999 | 23 | 0 |
| 2000 | 29 | 0 |
| 2001 | 39 | 12 |
| 2002 | 27 | 21 |
| 2003 | 46 | 50 |
| 2004 | 41 | 74 |
| 2005 | 44 | 68 |
| 2006 | 59 | 94 |
| 2007 | 57 | 79 |
| 2008 | 71 | 98 |
| 2009 | 45 | 65 |
| 2010 | 75 | 88 |
| 2011 | 48 | 96 |
| 2012 | 62 | 117 |
| 2013 | 85 | 106 |
| 2014 | 87 | 146 |
| 2015 | 66 | 129 |
| 2016 | 105 | 154 |
| 2017 | 113 | 175 |
| 2018 | 140 | 168 |
| 2019 | 182 | 177 |
| 2020 | 167 | 151 |
| 2021 | 152 | 128 |
| 2022 | 119 | 95 |
| 2023 | 112 | 116 |
| 2024 | 122 | 117 |
| 2025 | 100 | 83 |
| 2026 | 73 | 79 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process of making sulfonated lignin-based compositions, sulfonated lignin-based compositions so-obtained and their use29 Sep 2026US 12,747,259 B2Rg Dispersants Ltd.
- Deflocculation additives for wellbore servicing fluid additives15 Sep 2026US 12,735,620 B2Halliburton Energy Services.Inc.
- Methods of servicing a wellbore using a volcanic ash sealant composition15 Sep 2026US 12,735,621 B2Saudi Arabian Oil Company
- Methods of sealing a water-bearing formation using a red mud sealant composition15 Sep 2026US 12,735,622 B2Saudi Arabian Oil Company
- Core-shell particles for subterranean operations15 Sep 2026US 12,735,623 B2Halliburton Energy Services.Inc.
- Apparatus utilizing shape-memory and self-assembly to plug relatively wide remote fractures8 Oct 2026US 2026/0308440 A1The Penn State Research Foundation
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- High temperature universal fluids and methods and systems related thereto1 Oct 2026US 2026/0297415 A1Aramco Services Company
- Formulation for abandoning oil wells and process for producing said formulation24 Sep 2026US 2026/0286208 A1Petroleo Brasileiro S.A. - Petrobras
- High performance expandable liner hanger using hydrostatic assist by chemically modifying liner hanger environment17 Sep 2026US 2026/0275182 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Compositions and methods for cementing using elastic particles353US 6,508,305 B1BJ Services Company · 2003
- High temperature wellbore cement slurry319US 5,226,961 AShell Oil Company · 1993
- Encapsulated chemicals for use in controlled time release applications and methods314US 6,527,051 B1Halliburton Energy Services.Inc. · 2003
- Foamed well cement slurries, additives and methods302US 6,063,738 AHalliburton Energy Services.Inc. · 2000
- Controlling the release of chemical additives in well treating fluids282US 6,209,646 B1Halliburton Energy Services.Inc. · 2001