Particulate polyvinyl alcohol plugging agents

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United States of America Patent

PATENT NO 11549046
APP PUB NO 20210238467A1
SERIAL NO

17160445

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A particulate plugging agent, such as a diverting agent and/or loss circulation material, using a particular polyvinyl alcohol with a certain amount of monovalent metallic salt, which is water-soluble and has a buffer effect even if the environment is acidic, and thus stable, which in particular finds use in various subsurface oil production operations.

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Patent Owner(s)

  • KURARAY CO. LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ghebremeskel, Ghebrehiwet Houston, US 14 18
Morikawa, Keisuke Houston, US 38 72
Tajima, Yasuhiro Kurashiki, JP 30 157

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