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. 14, 2012
Filed:
Aug. 12, 2008
Theodore J. Vornbrock, Takoma Park, MD (US);
Theodore J. Vornbrock, Takoma Park, MD (US);
Raytheon Company, Waltham, MA (US);
Abstract
A communication module for transfer of information along a drill string has at least one antenna coil, wherein the communication module is configured such that a central coil axis of the antenna coil is substantially perpendicular to a longitudinal axis of a drill pipe to which it is affixed. Signals are relayed magnetically from node to node to exchange data along any desired length of drill string. The drill string itself forms a portion of the magnetic flux path and the earth and/or surrounding media forms another substantial portion of the closed flux path. Magnetic induction is advantageous because the steel drill pipe is ferromagnetic and exhibits a magnetic permeability of a few hundred to a few thousand times that of air.