Electrically conductive oil-based fluids
US-2017233632-A1 · Aug 17, 2017 · US
Non-aqueous well-drilling compositions, e.g. oil-based
Non-aqueous well-drilling compositions, e.g. oil-based · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C09K8/32 |
| Official title | Non-aqueous well-drilling compositions, e.g. oil-based |
| Display label | Non-aqueous well-drilling compositions, e.g. oil-based |
| Total patents | 376 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 25 |
| 2016 | 24 |
| 2017 | 39 |
| 2018 | 52 |
| 2019 | 76 |
| 2020 | 50 |
| 2021 | 32 |
| 2022 | 25 |
| 2023 | 19 |
| 2024 | 17 |
| 2025 | 17 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Metalate-based additives for use in subterranean formations
US-2017204319-A1 · Jul 20, 2017 · US
Guanidine- or guanidinium-containing compounds for treatment of subterranean formations
US-2017183560-A1 · Jun 29, 2017 · US
Thinner for oil-based drilling fluids
US-2017145286-A1 · May 25, 2017 · US
Fluid Loss Additives and Methods of Making and Using Same
US-2017145287-A1 · May 25, 2017 · US
Traceable Polymeric Additives for Use in Subterranean Formations
US-2017130117-A1 · May 11, 2017 · US
Phospho-friction reducing agents for use in oleaginous-based drilling fluids
US-9637673-B2 · May 2, 2017 · US
Lubricant Compositions and Methods of Making and Using Same
US-2017107417-A1 · Apr 20, 2017 · US
Organic water scavenging additives for use in drilling fluids
US-2017073565-A1 · Mar 16, 2017 · US
Wellbore fluids for use downhole
US-2017029686-A1 · Feb 2, 2017 · US
Process of manufacturing thickeners and use of thus produced thickeners in high-viscosity unsaturated polyester containing formulations
US-9546252-B1 · Jan 17, 2017 · US
Recovering base oil from contaminated invert emulsion fluid for making new oil-/synthetic-based fluids
US-2016376509-A1 · Dec 29, 2016 · US
Hydratable polymer slurry and method for water permeability control in subterranean formations
US-2016369153-A1 · Dec 22, 2016 · US
Process of manufacturing thickeners and use of thus produced thickeners in high-viscosity non aqueous formulations
US-9522981-B1 · Dec 20, 2016 · US
Downhole fluid compositions and methods of using carbon black particles
US-2016326423-A1 · Nov 10, 2016 · US
Secondary Esters, Methods of Making, and Uses Thereof
US-2016319178-A1 · Nov 3, 2016 · US
Wellbore service fluid
US-2016304763-A1 · Oct 20, 2016 · US
Synthesis of magnetic carbon nanoribbons and magnetic functionalized carbon nanoribbons
US-9449743-B2 · Sep 20, 2016 · US
Ethylene viscosifier polymer for treatment of a subterranean formation
US-9410069-B2 · Aug 9, 2016 · US
Rheology modifiers
US-9404029-B2 · Aug 2, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/32?
- CPC C09K8/32 is the Cooperative Patent Classification code for “Non-aqueous well-drilling compositions, e.g. oil-based.”
- How many patents are filed under CPC C09K8/32 (Non-aqueous well-drilling compositions, e.g. oil-based)?
- Our database includes 376 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/32 growing?
- Publication counts under this code: 17 in 2024 vs 17 in 2025 (latest complete years).