Method and device for conveying chemicals through borehole

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United States of America Patent

PATENT NO 4721159
SERIAL NO

06926640

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A capsule for conveying chemicals through a borehole for stopping lost circulation is totally made from a thermoplastic or fragile material or has a bottom plate made from such a material. The capsule containing the chemicals is let down until it reaches the location of the lost circulation, where the capsule is either destroyed by a drilling rod or softened by the high temperature and high pressure at the location. Thus, the chemicals are diffused.

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Patent Owner(s)

Patent OwnerAddress
TAKENAKA KOMUTEN CO LTDOSAKA-SHI OSAKA 541
SEKISO CO LTDA COMPANY OF JAPAN HAKATA-KU FUKUOKA-SHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kamata, Seizo Fukuoka, JP 2 132
Kitano, Masayasu Kashihara, JP 3 133
Ohkochi, Katsutoshi Funabashi, JP 2 132
Ohshita, Toshiyuki Hirakata, JP 2 132
Shinozaki, Mamoru Funabashi, JP 9 179

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