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:
Aug. 18, 1992
Filed:
Apr. 12, 1991
Truman R Stiner, Blackwell, OK (US);
Conoco Inc., Ponca City, OK (US);
Abstract
A data transmission system for use with such as the seven conductor logging cable that functions to provide more precise transmission of data signal with reduced interference from higher powered electrical signals present along the line. The data signals are modulated on a radio frequency carrier which is then inductively coupled to the cable jacket or shielding sheath for conduction along the cable. Thus, as the logging cable supports a downhole tool in a borehole, transmitter/receiver combinations both downhole and at the surface can communicate via modulated RF signal conducted along the standard shielding material of the cable. A primary advantage to this type of transmission is the fact that no signal must reverberate through the cable reel as it can be inductively picked off prior to the cable entering the reel section, resulting in much reduced attenuation and interference.