Well treatment fluid material and well treatment fluid comprising the same
US-2015361326-A1 · Dec 17, 2015 · US
Powder comprising hydrolyzable resin particles
US10385171B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10385171-B2 |
| Application number | US-201515508997-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 11, 2015 |
| Priority date | Sep 9, 2014 |
| Publication date | Aug 20, 2019 |
| Grant date | Aug 20, 2019 |
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Abstract
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A powder comprising hydrolyzable resin particle, containing particles which do not pass through a sieve having an opening size of 500 μm in an amount of 50 mass % or more and having a repose angle of 51° or more. This powder is preferably used as an additive for drilling to enhance the drilling properties of a drilling fluid and improve the retentivity of a fracture extending from a winze.
First claim
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The invention claimed is: 1. A powder comprising hydrolyzable resin particles, containing particles which do not pass through a sieve having an opening size of 500 μm in an amount of 50 mass % or more and having a repose angle of 51° or more, wherein the hydrolyzable resin is polylactic acid. 2. The powder according to claim 1 , wherein the resin particles have a 16-mesh pass particle diameter. 3. The powder according to claim 1 which has a bulk density of 0.30 to 0.54 g/ml. 4. The powder according to claim 1 , wherein the polylactic acid has a crystallinity of 30% or less. 5. The powder according to claim 1 which is used as an additive for drilling fluids. 6. The powder according to claim 1 which is used as an additive for excavation.
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Classifications
the macromolecular compounds being biodegradable · CPC title
characterised by their form or by the form of their components, e.g. foams · CPC title
obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title
characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) · CPC title
characterised by their form or by the form of their components, e.g. encapsulated material · CPC title
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- What does patent US10385171B2 cover?
- A powder comprising hydrolyzable resin particle, containing particles which do not pass through a sieve having an opening size of 500 μm in an amount of 50 mass % or more and having a repose angle of 51° or more. This powder is preferably used as an additive for drilling to enhance the drilling properties of a drilling fluid and improve the retentivity of a fracture extending from a winze.
- Who is the assignee on this patent?
- Toyo Seikan Group Holdings Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08J3/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 20 2019 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).