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:
Mar. 22, 1994
Filed:
Oct. 23, 1992
Applicant:
Inventors:
Hajime Yuasa, Akishima, JP;
Kazuho Hosono, Akishima, JP;
Assignee:
Akishima Laboratories(Mitsui Zosen) Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175 40 ;
Abstract
A bottom-hole information collecting equipment to collect data at the bottom part of the shaft in real time by the sonde throughout an excavation by the bit for digging. The sonde is provided to be mechanically and electronically connected to or separated from the connecting pipe to which the bite is attached arbitrarily. Data collected by several sensors near the bit is transmitted to the sonde via the electromagnetic coupler. The electricity for the sensors and the sonde can be obtained by respective generators of which one is in the sonde and the other is in the connecting pipe.