C09K 2208/00
Aspects relating to compositions of drilling or well treatment fluids
C09K2208/00 (Aspects relating to compositions of drilling or well treatment fluids) appears on 4,055 US grants and 5,086 published applications in this corpus.
Search patents in C09K- Granted patents
- 4,055
- Published applications
- 5,086
- Assignees
- 876
- Inventors
- 5,902
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 19 | 0 |
| 1994 | 10 | 0 |
| 1995 | 10 | 0 |
| 1996 | 9 | 0 |
| 1997 | 17 | 0 |
| 1998 | 21 | 0 |
| 1999 | 17 | 0 |
| 2000 | 30 | 0 |
| 2001 | 31 | 4 |
| 2002 | 27 | 25 |
| 2003 | 22 | 41 |
| 2004 | 20 | 53 |
| 2005 | 20 | 70 |
| 2006 | 38 | 99 |
| 2007 | 69 | 70 |
| 2008 | 48 | 123 |
| 2009 | 59 | 108 |
| 2010 | 90 | 132 |
| 2011 | 92 | 118 |
| 2012 | 77 | 174 |
| 2013 | 100 | 173 |
| 2014 | 112 | 225 |
| 2015 | 122 | 258 |
| 2016 | 145 | 363 |
| 2017 | 202 | 411 |
| 2018 | 289 | 394 |
| 2019 | 359 | 393 |
| 2020 | 364 | 405 |
| 2021 | 365 | 334 |
| 2022 | 318 | 229 |
| 2023 | 301 | 261 |
| 2024 | 259 | 266 |
| 2025 | 215 | 225 |
| 2026 | 115 | 132 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09K 2208/10Nanoparticle-containing well treatment fluidsIndexing code909
- C09K 2208/32Anticorrosion additivesIndexing code673
- C09K 2208/26Gel breakers other than bacteria or enzymesIndexing code529
- C09K 2208/28Friction or drag reducing additivesIndexing code491
- C09K 2208/08Fiber-containing well treatment fluidsIndexing code482
- C09K 2208/12Swell inhibition, i.e. using additives to drilling or well treatment fluids forIndexing code447
- C09K 2208/30Viscoelastic surfactants [ves]Indexing code404
- C09K 2208/22Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formersIndexing code359
All 16 subgroupsShow fewer
- C09K 2208/20Hydrogen sulfide eliminationIndexing code288
- C09K 2208/34Lubricant additivesIndexing code254
- C09K 2208/18Bridging agents, i.e. particles for temporarily filling the pores of a formationIndexing code245
- C09K 2208/24Bacteria or enzyme containing gel breakersIndexing code178
- C09K 2208/04Hulls, shells or bark containing well drilling or treatment fluidsIndexing code118
- C09K 2208/02Spotting, i.e. using additives for releasing a stuck drillIndexing code60
- C09K 2208/14Double emulsions, i.e. oil-in-water-in-oil emulsions or water-in-oil-in-water emulsionsIndexing code36
- C09K 2208/06Structured surfactants, i.e. well drilling or treating fluids with a lamellar orIndexing code35
Recent patents
- Corrosion inhibition compositions and methods of use in sour environments6 Oct 2026US 12,753,338 B2King Fahd University of Petroleum and Minerals
- Shale hydration inhibitors and subterranean treatment fluids containing them29 Sep 2026US 12,747,383 B2Lamberti SPA
- Corrosion-inhibiting agents for reducing dissolved oxygen concentrations within upstream oilfield systems22 Sep 2026US 12,742,111 B2Finoric, LLC
- Method of using tracer compositions having a degradable polymer and a detectable component for tracing gas flow in a hydrocarbon reservoir22 Sep 2026US 12,742,383 B2Saudi Arabian Oil Company
- Surface-modified nanoparticle compositions and related applications in subterranean hydrocarbon recovery15 Sep 2026US 12,735,626 B2
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Wellbore drilling compositions1 Oct 2026US 2026/0297413 A1Chevron Phillips Chemical Company LP
- Providing selective dissolvable coatings on a multi-shell core system for inflow control devices1 Oct 2026US 2026/0297418 A1Saudi Arabian Oil Company
- Method of making water-soluble polymers for use as shale encapsulators for drilling fluids24 Sep 2026US 2026/0286026 A1BASF SE
- Process for preparing an oil-well cement slurry24 Sep 2026US 2026/0286209 A1Oil and Natural Gas Corporation Limited
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Control of particulate flowback in subterranean wells379US 5,330,005 ADowell Schlumberger Incorporated · 1994
- Control of particulate flowback in subterranean wells372US 5,501,275 ADowell, a division of Schlumberger Technology Corporation · 1996
- Control of particulate flowback in subterranean wells358US 5,439,055 ADowell, a division of Schlumberger Technology Corporation · 1995
- Methods for limiting the inflow of formation water and for stimulating subterranean formations350US 5,979,557 ASchlumberger Technology Corporation · 1999