C09K 2208/12
Swell inhibition, i.e. using additives to drilling or well treatment fluids for
Official title: Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
C09K2208/12 (Swell inhibition, i.e. using additives to drilling or well treatment fluids for) appears on 447 US grants and 498 published applications in this corpus.
Search patents in C09K- Granted patents
- 447
- Published applications
- 498
- Assignees
- 171
- Inventors
- 927
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 4 |
| 2004 | 2 | 6 |
| 2005 | 2 | 7 |
| 2006 | 6 | 10 |
| 2007 | 6 | 7 |
| 2008 | 1 | 7 |
| 2009 | 15 | 14 |
| 2010 | 8 | 11 |
| 2011 | 8 | 8 |
| 2012 | 8 | 17 |
| 2013 | 4 | 9 |
| 2014 | 8 | 12 |
| 2015 | 7 | 22 |
| 2016 | 10 | 37 |
| 2017 | 23 | 48 |
| 2018 | 39 | 55 |
| 2019 | 37 | 36 |
| 2020 | 44 | 47 |
| 2021 | 45 | 41 |
| 2022 | 48 | 18 |
| 2023 | 34 | 20 |
| 2024 | 23 | 26 |
| 2025 | 23 | 21 |
| 2026 | 11 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Shale hydration inhibitors and subterranean treatment fluids containing them29 Sep 2026US 12,747,383 B2Lamberti SPA
- Compositions and methods for pressure protection2 Jun 2026US 12,644,043 B2Chevron U.S.A.Inc.
- Water/gas ratio reducer compounds26 May 2026US 12,637,930 B2Petroraza SAS
- Injection fluids for stimulating fractured formations12 May 2026US 12,624,277 B2Chevron U.S.A.Inc.
- System and method for sealing a well using controlled hydration expansion of a smectite-containing clay mineral14 Apr 2026US 12,600,895 B2
- 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
- Method for single-stage treatment of siliceous subterranean formations13 Aug 2026US 2026/0234465 A1Schlumberger Technology Corporation
- Co2 foam fluids for fracturing applications18 Jun 2026US 2026/0167857 A1Beijing Huamei, Inc.
- High-temperature foam fracturing fluid with synthetic polymer14 May 2026US 2026/0132330 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Drilling fluid additive and method for inhibiting hydration131US 5,908,814 AM - I L. L. C. · 1999
- Water-based drilling fluids for reduction of water adsorption and hydration of argillaceous rocks122US 5,635,458 AM-I Drilling Fluids Company · 1997
- Oil well spacer fluids114US 4,141,843 AHalliburton Company · 1979
- Shale hydration inhibition agent and method of use105US 6,247,543 B1M - I L. L. C. · 2001
- Nanofluids and methods of use for drilling and completion fluids104US 8,822,386 B2Baker Hughes Incorporated · 2014