Polyvinyl alcohol based diverting agents
US-2020071605-A1 · Mar 5, 2020 · US
Diverting agent and method of filling fracture in well using same
US12110450B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12110450-B2 |
| Application number | US-202117352693-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2021 |
| Priority date | Dec 27, 2018 |
| Publication date | Oct 8, 2024 |
| Grant date | Oct 8, 2024 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
An object of the present invention is to provide a diverting agent that can exhibit sufficient filling properties against a fracture in a well in an excavation method using a hydraulic fracturing method, and that is excellent in solubility after a predetermined period of time has passed. The diverting agent of the present invention contains a polyvinyl alcohol-based resin having an average polymerization degree of 1000 or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A diverting agent, comprising: a polyvinyl alcohol-based resin having an average polymerization degree of 2800 to 4000; wherein the polyvinyl alcohol-based resin has a degree of saponification in the range of from 60 mol % to 98.5 mol %, and the polyvinyl alcohol-based resin is a modified polyvinyl alcohol-based resin, the modified polyvinyl alcohol-based resin being a polyvinyl alcohol-based resin having a primary hydroxy group in a side chain or an ethylene-modified polyvinyl alcohol-based resin. 2. The diverting agent according to claim 1 , wherein the degree of saponification of the polyvinyl alcohol-based resin is in the range of from 90 mol % to 98.5 mol %. 3. The diverting agent according to claim 1 , wherein the polyvinyl alcohol-based resin is contained in an amount of 50 mass % or more. 4. The diverting agent according to claim 1 , wherein the modified polyvinyl alcohol-based resin is the ethylene-modified polyvinyl alcohol-based resin. 5. The diverting agent according to claim 1 , wherein a modification rate of the modified polyvinyl alcohol-based resin is 0.1 mol % to 20 mol %. 6. A method of temporarily filling a fracture generated in a well, the method comprising: allowing the diverting agent according to claim 1 to flow into a fracture to be filled with a flow of a fluid in the well.
Assignees
Inventors
Classifications
characterised by their form or by the form of their components, e.g. encapsulated material · CPC title
characterised by their form or by the form of their components, e.g. foams · CPC title
characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) · CPC title
Polyvinyl alcohol {; Vinyl alcohol} · CPC title
Hydrolysis · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12110450B2 cover?
- An object of the present invention is to provide a diverting agent that can exhibit sufficient filling properties against a fracture in a well in an excavation method using a hydraulic fracturing method, and that is excellent in solubility after a predetermined period of time has passed. The diverting agent of the present invention contains a polyvinyl alcohol-based resin having an average poly…
- Who is the assignee on this patent?
- Mitsubishi Chem Corp
- What technology area does this patent fall under?
- Primary CPC classification C09K8/5083. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 08 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).