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:
Nov. 17, 1987
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;
Assignee:
Takanaka Komuten Co., Ltd, , JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166286 ; 166376 ; 166 546 ; 166117 ; 166168 ; 206601 ; 220 / ; 220277 ;
Abstract
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.