Invert emulsion treatment fluids comprising polar organic compounds and methods of use in subterranean operations
US-2017369760-A1 · Dec 28, 2017 · US
Oil-based compositions
Oil-based compositions · 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 | C09K8/502 |
| Official title | Oil-based compositions |
| Display label | Oil-based compositions |
| Total patents | 277 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 20 |
| 2016 | 23 |
| 2017 | 31 |
| 2018 | 33 |
| 2019 | 21 |
| 2020 | 29 |
| 2021 | 40 |
| 2022 | 32 |
| 2023 | 19 |
| 2024 | 17 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Lost Circulation Materials Comprising Cane Ash
US-2017369757-A1 · Dec 28, 2017 · US
Latent curing agent compatible with low pH frac fluids
US-9840656-B2 · Dec 12, 2017 · US
Lost Circulation Materials Comprising Red Mud
US-2017342786-A1 · Nov 30, 2017 · US
Fluorous additives for use in a fluorous-based treatment fluid
US-9803452-B2 · Oct 31, 2017 · US
Fluid loss control package for use in subterranean formation operations
US-9783727-B2 · Oct 10, 2017 · US
Oil-based drilling fluids containing an alkaline-earth diamondoid compound as rheology modifier
US-2017267910-A1 · Sep 21, 2017 · US
Fluid Loss Additives and Methods of Making and Using Same
US-2017145287-A1 · May 25, 2017 · US
Reaction products of acrylamide polymers and methods for use thereof as relative permeability modifiers
US-9644130-B2 · May 9, 2017 · US
Rheology modifier for drilling and well treatment fluids
US-9611418-B2 · Apr 4, 2017 · US
Internal breaker compositions for wellbore applications
US-2017088763-A1 · Mar 30, 2017 · US
Fluid loss additives and methods of making and using same
US-9598627-B2 · Mar 21, 2017 · US
Sulfonated relative permeability modifiers for reducing subterranean formation water permeability
US-9598631-B2 · Mar 21, 2017 · US
Smart lcm for strengthening earthen formations
US-2017015887-A1 · Jan 19, 2017 · US
Smart filtrate for strengthening formations
US-2017015890-A1 · Jan 19, 2017 · US
Consolidation Compositions Comprising Multipodal Silane Coupling Agents
US-2017009126-A1 · Jan 12, 2017 · US
Sulfonated relative permeability modifiers for reducing subterranean formation water permeability
US-2017002262-A1 · Jan 5, 2017 · US
Thermal thickening in invert emulsion treatment fluids
US-2016369151-A1 · Dec 22, 2016 · US
Hydratable polymer slurry and method for water permeability control in subterranean formations
US-2016369153-A1 · Dec 22, 2016 · US
Fluids and methods for treating hydrocarbon-bearing formations
US-2016347985-A1 · Dec 1, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/502?
- CPC C09K8/502 is the Cooperative Patent Classification code for “Oil-based compositions.”
- How many patents are filed under CPC C09K8/502 (Oil-based compositions)?
- Our database includes 277 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/502 growing?
- Publication counts under this code: 17 in 2024 vs 10 in 2025 (latest complete years).