Metalate-based additives for use in subterranean formations
US-2018362825-A1 · Dec 20, 2018 · US
Well-drilling compositions
Well-drilling 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 | C09K8/02 |
| Official title | Well-drilling compositions |
| Display label | Well-drilling compositions |
| Total patents | 133 |
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 | 14 |
| 2016 | 6 |
| 2017 | 23 |
| 2018 | 17 |
| 2019 | 17 |
| 2020 | 20 |
| 2021 | 16 |
| 2022 | 9 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods of using lost circulation treatment materials comprising brown mud
US-10125299-B2 · Nov 13, 2018 · US
Dissolvable isolation devices with an altered surface that delays dissolution of the devices
US-10125565-B2 · Nov 13, 2018 · US
Superhydrophobic Additive
US-2018320052-A1 · Nov 8, 2018 · US
Lost circulation materials comprising cane ash
US-10119060-B2 · Nov 6, 2018 · US
Pcr amplification methods for detecting and quantifying sulfate-reducing bacteria in oilfield fluids
US-2018291428-A1 · Oct 11, 2018 · US
Metalate-based additives for use in subterranean formations
US-10072199-B2 · Sep 11, 2018 · US
Methods of Cleaning Invert Emulsion Drilling Fluids
US-2018244973-A1 · Aug 30, 2018 · US
Lubricating compositions for use with downhole fluids
US-10053935-B2 · Aug 21, 2018 · US
Alpha-olefin sulfonic dimer acid process
US-2018222854-A1 · Aug 9, 2018 · US
Use of carbonates as wellbore treatment
US-2018215987-A1 · Aug 2, 2018 · US
In-Line Methods And Apparatuses For Determining The Composition Of An Emulsified Drilling Fluid
US-2018202246-A1 · Jul 19, 2018 · US
Drilling fluids with crosslinked sulfonate-containing polymers dispersed in high density brines
US-10000683-B2 · Jun 19, 2018 · US
Polypeptides having xanthan degrading activity and polynucleotides encoding same
US-9988616-B2 · Jun 5, 2018 · US
Methods for quantifying nitrogen-containing compounds in subterranean treatment fluids
US-2018080917-A1 · Mar 22, 2018 · US
Bead Suspension Mixing with Cement Slurry
US-2018079948-A1 · Mar 22, 2018 · US
Salt tolerant settling retardant proppants
US-2018002594-A1 · Jan 4, 2018 · US
Lost Circulation Materials Comprising Cane Ash
US-2017369757-A1 · Dec 28, 2017 · US
Lost Circulation Materials Comprising Brown Mud
US-2017369758-A1 · Dec 28, 2017 · US
Methods of use for crosslinked polymer compositions in subterranean formation operations
US-2017369617-A1 · Dec 28, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/02?
- CPC C09K8/02 is the Cooperative Patent Classification code for “Well-drilling compositions.”
- How many patents are filed under CPC C09K8/02 (Well-drilling compositions)?
- Our database includes 133 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/02 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).