Back to results
US 11,142,678 B2Granted
Downhole tool
AssigneeKureha Corporation
InventorsFuminori Kobayashi, Hikaru Saijo
Life of this patent
Estimating the term…
Abstract
A downhole tool that has a high initial compressive strength, can maintain compressive strength for a certain period of time, and is rapidly degradable after use. The downhole tool is formed from a degradable resin composition containing a polyamide resin and a carboxylic acid anhydride, and the carboxylic acid anhydride is a compound satisfying the following melting point condition: melting point of polyamide resin≤5% weight reduction temperature of carboxylic acid anhydride.
Claims7
A downhole tool formed from a degradable resin composition comprising a polyamide resin and a carboxylic acid anhydride,
- wherein the carboxylic acid anhydride is a compound satisfying the following condition:
- melting point of polyamide resin≤5% weight reduction temperature of carboxylic acid anhydride.
Dependencies are inferred from the claim text.