The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 1988
Filed:
Jan. 23, 1987
Motoki Kondo, Tokyo, JP;
Hirosuke Kubota, Kawanishi, JP;
Mamoru Shinozaki, Funabashi, JP;
Toshiyuki Oshita, Hirakata, JP;
Tomohiro Teramura, Yawata, JP;
Masayasu Kitano, Kashiwara, JP;
Katsumi Shirai, Kashiwa, JP;
Kabushiki Kaisha Takenaka Komuten, Osaka, JP;
Abstract
This invention provides a method of preventing loss of muddy water used in boring a hole in the ground by a drill bit or the like with the muddy water introduced into the hole to stabilize hole walls and to remove slime resulting from the boring. When the muddy water is getting lost to the soil, a chemical liquid comprising an isocyanate compound or including an isocyanate compound as a main component is introduced along with a fibrous filler to a depth of the hole. The position from which the muddy water is leaking is filled with the fibrous filler and is sealed with a cured product of the chemical liquid.