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. 01, 1987
Filed:
Jul. 01, 1983
Llewellyn A Rubin, Westlake Village, CA (US);
William H Harrison, Canoga Park, CA (US);
Other;
Abstract
A system and method is described for amplifying and transmitting an information signal from a downhole drillstring location. The amplifier shifts the relatively low frequency information signal up to a high frequency level, amplifies the high frequency signal and processes it through an impedance matching transformer, and then demodulates the amplified signal back to the original low frequency for transmission through the earth to the surface, thus enabling the use of a much smaller transformer than when the information signal is processed entirely at the low frequency level. A novel transducer consisting of generally cylindrical conductive sleeves separated by an insulative gap is used to provide structural integrity and to transmit the amplified information signal. The conductive sleeves are heat shrunk onto an insulative sleeve and a central mandrel.