Polycarboxylate thinner for carbonate/bicarbonate contamination resistant water-based drilling fluid and preparation method and application thereof
US-12509620-B1 · Dec 30, 2025 · US
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Lv Kaihe patents
Lv Kaihe is listed as an inventor on 33 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Lv Kaihe |
| Total patents | 33 |
| First publication | Jun 20, 2017 |
| Latest publication | Dec 30, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Strongly adsorbed hyper-branched filtrate reducer for water-based drilling fluid with resistance to 240° C. and saturated salinity, preparation method therefor and use thereof
US-12384953-B1 · Aug 12, 2025 · US
Phase change microcapsule for drilling fluid cooling and its preparation method and application
US-2025250474-A1 · Aug 7, 2025 · US
Phase change microcapsule for drilling fluid cooling and its preparation method and application
US-12378458-B1 · Aug 5, 2025 · US
High density environmentally friendly polymer water-based drilling fluid with resistance to 240° C. and saturated salts, preparation method therefor and use thereof
US-12269985-B1 · Apr 8, 2025 · US
High-temperature and high-salt resistant hyperbranched lubricant for water-based drilling fluid, and preparation and application thereof
US-12264279-B1 · Apr 1, 2025 · US
Anti-strength-retrogression cementing system with excellent pumpability performance and preparation method thereof
US-2025034039-A1 · Jan 30, 2025 · US
Bio-enzyme degradable temporary plugging material and preparation method and application thereof
US-12110449-B1 · Oct 8, 2024 · US
Oil-soluble thermosensitive resin lost circulation material for protecting a reservoir as well as preparation method and application thereof
US-12043742-B2 · Jul 23, 2024 · US
High temperature and high salinity-resistant complementarily rigid-flexible plugging agent and method for preparing the same and water-based drilling fluid and use thereof
US-11970655-B2 · Apr 30, 2024 · US
Recent patents
Latest publications not already listed above.
High temperature and high salinity-resistant complementarily rigid-flexible plugging agent and method for preparing the same and water-based drilling fluid and use thereof
US-2024010904-A1 · Jan 11, 2024 · US
Nano-organosilicon film-forming and hydrophobic shale surface hydration inhibitor and its preparation method and application
US-11807802-B2 · Nov 7, 2023 · US
Oil-soluble thermosensitive resin lost circulation material for protecting a reservoir as well as preparation method and application thereof
US-2023086238-A1 · Mar 23, 2023 · US
Cementitious plugging wall solidifer for water-based drilling fluid, and a preparation method thereof and a water-based drilling fluid
US-11578250-B1 · Feb 14, 2023 · US
Flocculating agent for removing oil-based drilling fluid rock cuttings and preparation method and use thereof
US-2023017294-A1 · Jan 19, 2023 · US
Water-based gel-consolidation type lost circulation material system suitable for fractured lost circulation formation, preparation method and use thereof
US-11472999-B1 · Oct 18, 2022 · US
High-temperature resistant, high-strength, and thixotropic gel plugging agent and its preparation method and application
US-11421140-B2 · Aug 23, 2022 · US
Nano-organosilicon film-forming and hydrophobic shale surface hydration inhibitor and its preparation method and application
US-2022228050-A1 · Jul 21, 2022 · US
High temperature-resistant and high oil-absorption resin particle plugging agent suitable for oil-based drilling fluid and its preparation method
US-11384275-B2 · Jul 12, 2022 · US
Environment-friendly high-temperature resistant water-based drilling fluid plugging anti-sloughing agent, preparation method thereof and the water-based drilling fluid
US-11072738-B2 · Jul 27, 2021 · US
Environment-friendly high-temperature resistant water-based drilling fluid plugging anti-sloughing agent, preparation method thereof and the water-based drilling fluid
US-2021189216-A1 · Jun 24, 2021 · US
High temperature-resistant and high oil-absorption resin particle plugging agent suitable for oil-based drilling fluid and its preparation method
US-2021139764-A1 · May 13, 2021 · US
High-Temperature Resistant, High-Strength, and Thixotropic Gel Plugging Agent and Its Preparation Method and Application
US-2021087453-A1 · Mar 25, 2021 · US
Modified silicon dioxide material of fluorocarbon active agent type super-amphiphobic cutting-carrying agent suitable for water-based drilling fluid and preparation method thereof
US-10876034-B1 · Dec 29, 2020 · US
Temporary plugging agent for drilling fluid and preparation method thereof, and water-based drilling fluid and use thereof
US-10647902-B1 · May 12, 2020 · US
Water-based drilling fluid for protecting fractured reservoirs, and preparation method and use thereof
US-10392552-B2 · Aug 27, 2019 · US
Water-based drilling fluid for protecting high-permeability reservoirs, and preparation method and use thereof
US-10040984-B1 · Aug 7, 2018 · US
Water-based drilling fluid for protecting high-permeability reservoirs, and preparation method and use thereof
US-2018208824-A1 · Jul 26, 2018 · US
Water-based drilling fluid for protecting fractured reservoirs, and preparation method and use thereof
US-2018208823-A1 · Jul 26, 2018 · US
Reservoir protecting agent composition for reservoir with cracks, drilling fluid containing the same and use thereof
US-2018118993-A1 · May 3, 2018 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Univ China Petroleum East China | 30 |
| Univ China Petroleum | 2 |
| Univ China Petroleum Beijing | 1 |
| China Univesity Of Petroleum East China | 1 |
| China Univ Of Petroleum East China Shandong China | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.