Diverting agent and method of filling fracture in well using same
US-2020317985-A1 · Oct 8, 2020 · US
Diverting agent and method of filling fracture in well using the same
US11891569B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11891569-B2 |
| Application number | US-202117397336-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 9, 2021 |
| Priority date | Feb 13, 2019 |
| Publication date | Feb 6, 2024 |
| Grant date | Feb 6, 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.
A diverting agent is provided which has solubility in water that can be controlled excellently and which does not easily dissolve at an early stage of filling of fractures in a well in excavation method using a hydraulic fracturing method and dissolves in water and can be easily removed after filling is no longer needed. The diverting agent contains powdery polyvinyl alcohol-based resins having an average particle diameter of 800 to 2000 μm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A diverting agent, comprising: powdery polyvinyl alcohol-based resins having an average particle diameter of 800 to 2000 μm, wherein: when 1 g of the polyvinyl alcohol-based resin is immersed in 100 g of water at 23° C. for an hour, the residual rate of the polyvinyl alcohol-based resin is 50 mass % or more, and when 1 g of the polyvinyl alcohol-based resin is immersed in 100 g of water at 40° C. for seven days, the residual rate of the polyvinyl alcohol-based resin is 10 mass % or less. 2. The diverting agent according to claim 1 , wherein the degree of saponification of the polyvinyl alcohol-based resin is 90 to 100 mol %. 3. The diverting agent according to claim 1 , wherein the polyvinyl alcohol-based resin is a polyvinyl alcohol-based resin having a hydrophilic modifying group. 4. A method of filling a fracture in a well which is a method of temporarily filling the fracture generated in the well, comprising: allowing the diverting agent according to claim 1 to flow into the fracture with a flow of fluid in the well. 5. The method of claim 4 , wherein the fracture has a temperature of 40-60° C. 6. The diverting agent of claim 1 , wherein the powdery polyvinyl alcohol-based resins have an average degree of polymerization of 200 to 3000 when measured in accordance with JIS K 6726: 1994.
Assignees
Inventors
Classifications
- C09K8/68Primary
containing organic compounds · CPC title
- C09K8/70Primary
characterised by their form or by the form of their components, e.g. foams · CPC title
reinforcing fractures by propping · CPC title
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. encapsulated material (C09K8/70 takes precedence) · 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 US11891569B2 cover?
- A diverting agent is provided which has solubility in water that can be controlled excellently and which does not easily dissolve at an early stage of filling of fractures in a well in excavation method using a hydraulic fracturing method and dissolves in water and can be easily removed after filling is no longer needed. The diverting agent contains powdery polyvinyl alcohol-based resins having…
- Who is the assignee on this patent?
- Mitsubishi Chem Corp
- What technology area does this patent fall under?
- Primary CPC classification C09K8/68. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).