Extended release asphaltene inhibitor composition
US-2024059948-A1 · Feb 22, 2024 · US
Aqueous well-drilling compositions
Aqueous 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 | C09K8/04 |
| Official title | Aqueous well-drilling compositions |
| Display label | Aqueous well-drilling compositions |
| Total patents | 355 |
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 | 10 |
| 2016 | 20 |
| 2017 | 27 |
| 2018 | 62 |
| 2019 | 56 |
| 2020 | 51 |
| 2021 | 42 |
| 2022 | 31 |
| 2023 | 25 |
| 2024 | 14 |
| 2025 | 16 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Self-triggering lost circulation control in carbonate formation
US-10047268-B2 · Aug 14, 2018 · US
Spacer fluids and cement slurries that include surfactants
US-2018223168-A1 · Aug 9, 2018 · US
Compositions for enhanced oil recovery
US-2017369759-A1 · Dec 28, 2017 · US
Drilling method using high density, high strength, acid soluble pseudo-crosslinked, lost circulation preventative material
US-9828293-B2 · Nov 28, 2017 · US
Aldehydes as a catalyst for an oxidative breaker
US-2017335172-A1 · Nov 23, 2017 · US
Treatment fluids comprising calcium aluminate cement and methods of use
US-2017313926-A1 · Nov 2, 2017 · US
Alkylated Polyetheramines as Clay Stabilizing Agents
US-2017306210-A1 · Oct 26, 2017 · US
Drilling fluid compositions and methods for use thereof in subterranean formations
US-9790416-B2 · Oct 17, 2017 · US
Method of conversion of a drilling mud to a gel-based lost circulation material to combat lost circulation during continuous drilling
US-2017260819-A1 · Sep 14, 2017 · US
Heat removal in drilling and production operations
US-9758711-B2 · Sep 12, 2017 · US
Drilling mud composition with aloe vera particles and a fracking process using the same
US-2017233629-A1 · Aug 17, 2017 · US
Alkylated polyetheramines as clay stabilizing agents
US-9719007-B2 · Aug 1, 2017 · US
Surfactant formulations for reduced and delayed adsorption
US-2017210977-A1 · Jul 27, 2017 · US
Water-soluble hydroxyalkyl polymer obtained by a method of inverse suspension or inverse emulsion polymerisation
US-2017204210-A1 · Jul 20, 2017 · US
Modified hydroxyethyl cellulosic polymers for improved well bore fluids and related uses
US-2017204318-A1 · Jul 20, 2017 · US
Drilling method using high density, high strength, acid soluble pseudo-crosslinked, lost circulation preventative material
US-2017190622-A1 · Jul 6, 2017 · US
High density, high strength, acid soluble pseudo-crosslinked, lost circulation preventative material
US-9695351-B2 · Jul 4, 2017 · US
Method of conversion of a drilling mud to a gel-based lost circulation material to combat lost circulation during continuous drilling
US-9695653-B2 · Jul 4, 2017 · US
Guanidine- or guanidinium-containing compounds for treatment of subterranean formations
US-2017183560-A1 · Jun 29, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/04?
- CPC C09K8/04 is the Cooperative Patent Classification code for “Aqueous well-drilling compositions.”
- How many patents are filed under CPC C09K8/04 (Aqueous well-drilling compositions)?
- Our database includes 355 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/04 growing?
- Publication counts under this code: 14 in 2024 vs 16 in 2025 (latest complete years).