Sealing gel with delayed gelation for well cementation, preparation method, and application
US-2025250476-A1 · Aug 7, 2025 · US
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Lu Chang patents
Lu Chang is listed as an inventor on 21 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Lu Chang |
| Total patents | 21 |
| First publication | Aug 4, 2020 |
| Latest publication | Aug 7, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Sealing gel with delayed gelation for well cementation, preparation method, and application
US-12378462-B1 · Aug 5, 2025 · US
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
Iminosulfanone compound as bromodomain protein inhibitor and pharmaceutical composition and medical use thereof
US-12030880-B2 · Jul 9, 2024 · US
Intra-layer reinforcement method, and consolidation and reconstruction simulation experiment system and evaluation method for gas hydrate formation
US-11905812-B2 · Feb 20, 2024 · US
Oil well cement composite permeation enhancement agent suitable for hydrate layer and preparation method
US-11866367-B2 · Jan 9, 2024 · US
Scour-resistant interface enhancer used for well cementing of coalbed methane wells, preparation method, and application
US-11820936-B2 · Nov 21, 2023 · US
Oil well cement composite permeation enhancement agent suitable for hydrate layer and preparation method
US-2023357080-A1 · Nov 9, 2023 · US
Method of cement for well cementing in penetrated hydrate layer
US-11719658-B2 · Aug 8, 2023 · US
Scour-resistant interface enhancer used for well cementing of coalbed methane wells, preparation method, and application
US-2023227710-A1 · Jul 20, 2023 · US
Recent patents
Latest publications not already listed above.
Display screen or portion thereof with graphical user interface
US-D983819-S · Apr 18, 2023 · US
Design method of cement for well cementing in penetrated hydrate layer
US-2023091934-A1 · Mar 23, 2023 · US
Intra-layer reinforcement method, and consolidation and reconstruction simulation experiment system and evaluation method for gas hydrate formation
US-2023063437-A1 · Mar 2, 2023 · US
Cement performance evaluation device and cement design method for cementing in penetrated hydrate deposit
US-11567018-B2 · Jan 31, 2023 · US
Cement performance evaluation device and cement design method for cementing in penetrated hydrate deposit
US-2022236203-A1 · Jul 28, 2022 · US
Automatic coal mining machine and fluidized coal mining method
US-11391151-B2 · Jul 19, 2022 · US
Automatic coal mining machine and fluidized coal mining method
US-2021340870-A1 · Nov 4, 2021 · US
Sulfoximine compound as bromodomain protein inhibitor and pharmaceutical composition and medical use thereof
US-2021300923-A1 · Sep 30, 2021 · US
Mine field layout method suitable for fluidized mining of coal resources
US-10975694-B2 · Apr 13, 2021 · US
Mine field layout method suitable for fluidized mining of coal resources
US-2021003008-A1 · Jan 7, 2021 · US
Transparent constraint apparatus for normal deformation of planar model
US-10731962-B1 · Aug 4, 2020 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Univ China Petroleum East China | 13 |
| Univ China Mining | 4 |
| Univ Qingdao Technology | 3 |
| Univ Shenzhen | 3 |
| Chia Tai Tianqing Pharmaceutical Group Co Ltd | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| E21C41/18 | 4 |
| G01N33/383 | 4 |
| G01N25/18 | 4 |
| E21B33/14 | 4 |
| E21B49/02 | 4 |