Takenaka Komuten Co., Ltd.

Takanaka Komuten Co., Ltd

Sekiso Co., Ltd.

Seizo Kamata

Mamoru Shinozaki

Masayasu Kitano

Katsutoshi Ohkochi

Toshiyuki Ohshita

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.

Method and device for conveying chemicals through borehole

A capsule for conveying chemicals through a borehole for stopping lost circulation has a fragile bottom plate. A weight for destroying the bottom plate is suspended above the capsule by a cord which extends over knife edges. A messenger for cutting the cord is mounted to a wire line. The weight is caused to collide with the messenger to cut the cord, for breaking the bottom plate. Thus, the chemicals are diffused.

Growing community of inventors

Fukuoka, Japan

Seizo Kamata