Mixture for pre-cementing operation in wellbore
US-12522762-B2 · Jan 13, 2026 · US
using spacer compositions
using spacer 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 | C09K8/501 |
| Official title | {using spacer compositions} |
| Display label | using spacer compositions |
| Total patents | 44 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 6 |
| 2021 | 10 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Anti-corrosion and low-heat-conduction annulus protection fluid for deep-sea oil and gas exploitation and preparation method thereof
US-12071587-B1 · Aug 27, 2024 · US
Geopolymer formulations for mitigating losses
US-11976238-B2 · May 7, 2024 · US
Mixture for pre-cementing operation in wellbore
US-2024117236-A1 · Apr 11, 2024 · US
Mixture for pre-cementing operation in wellbore
US-11884873-B2 · Jan 30, 2024 · US
Diluent for solids-control fluid in a wellbore
US-11807809-B2 · Nov 7, 2023 · US
Diluent for solids-control fluid in a wellbore
US-2023193114-A1 · Jun 22, 2023 · US
Mixture for pre-cementing operation in wellbore
US-2023131837-A1 · Apr 27, 2023 · US
Primary proppant flowback control
US-11512574-B1 · Nov 29, 2022 · US
Thermally responsive lost circulation materials
US-11499087-B2 · Nov 15, 2022 · US
Methods and compositions for mitigating fluid loss from well ballooning
US-11365341-B2 · Jun 21, 2022 · US
Geopolymer formulations for mitigating losses
US-2022017810-A1 · Jan 20, 2022 · US
Methods and compositions for mitigating fluid loss from well ballooning
US-2021371722-A1 · Dec 2, 2021 · US
Geopolymer formulations for mitigating losses
US-11162015-B2 · Nov 2, 2021 · US
Agglomerated zeolite catalyst for spacers and efficiency fluids
US-11098234-B2 · Aug 24, 2021 · US
Geopolymer formulations for mitigating losses
US-2021253934-A1 · Aug 19, 2021 · US
Thermally responsive lost circulation materials
US-2021179915-A1 · Jun 17, 2021 · US
Lost circulation material compositions and methods of isolating a lost circulation zone of a wellbore
US-10995256-B2 · May 4, 2021 · US
Compositions for sealing a lost circulation zone in a wellbore
US-10988664-B2 · Apr 27, 2021 · US
Thermally responsive lost circulation materials
US-10961431-B1 · Mar 30, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/501?
- CPC C09K8/501 is the Cooperative Patent Classification code for “using spacer compositions.”
- How many patents are filed under CPC C09K8/501 (using spacer compositions)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/501 growing?
- Publication counts under this code: 3 in 2023 vs 4 in 2024 (latest complete years).