Diverting agent and method of filling fracture in well using the same
US-2023147740-A1 · May 11, 2023 · US
Diverting agent and method of filling fracture in well using same
US12054667B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12054667-B2 |
| Application number | US-202117354385-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 22, 2021 |
| Priority date | Dec 27, 2018 |
| Publication date | Aug 6, 2024 |
| Grant date | Aug 6, 2024 |
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- Title
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Abstract
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A diverting agent is provided that exhibits sufficient filling properties against a fracture in a well because of swelling without complete dissolution for a certain period of time (about 30 minutes to 5 hours), and that quickly dissolves and can be removed even at a low temperature of 40° C. to 60° C. after a certain period of time has passed. Also provided is a diverting agent that contains a modified polyvinyl alcohol-based resin.
First claim
Opening claim text (preview).
The invention claimed is: 1. A diverting agent, comprising: a modified polyvinyl alcohol-based resin, wherein: the modified polyvinyl alcohol-based resin comprises a modifying group comprising a carboxyl group, a cationic group, or an active methylene-containing group; the modified polyvinyl alcohol-based resin has a form that is columnar or powdery; and a 4 mass % aqueous solution of the modified polyvinyl alcohol-based resin has a viscosity of 2 mPa·sec to 80 mPa·sec when measured at 20° in accordance with JIS K 6726:1994. 2. The diverting agent according to claim 1 , wherein the modified polyvinyl alcohol-based resin is a polyvinyl alcohol-based resin having a hydrophilic group. 3. The diverting agent according to claim 1 , wherein the modified polyvinyl alcohol-based resin has a modification rate of 10.0 mol % or less. 4. 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.
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Classifications
Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof · CPC title
Polyvinyl alcohol {; Vinyl alcohol} · CPC title
Vinyl acetate · CPC title
macromolecular compounds {(C09K8/512 takes precedence)} · CPC title
by forming crevices or fractures · CPC title
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- What does patent US12054667B2 cover?
- A diverting agent is provided that exhibits sufficient filling properties against a fracture in a well because of swelling without complete dissolution for a certain period of time (about 30 minutes to 5 hours), and that quickly dissolves and can be removed even at a low temperature of 40° C. to 60° C. after a certain period of time has passed. Also provided is a diverting agent that contains a…
- 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 Aug 06 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 10 related publications on this page (citations in our corpus or others sharing the same primary CPC).