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:
Jan. 26, 1988
Filed:
Nov. 04, 1986
Applicant:
Inventors:
Katsutoshi Ohkochi, Funabashi, JP;
Mamoru Shinozaki, Funabashi, JP;
Toshiyuki Ohshita, Hirakata, JP;
Masayasu Kitano, Kashihara, JP;
Seizo Kamata, Fukuoka, JP;
Assignees:
Takenaka Komuten Co., Ltd., both of, JP;
Sekiso Co., Ltd., both of, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166286 ; 166376 ; 166381 ; 166117 ; 166168 ;
Abstract
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.