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. 18, 2008
Filed:
Jun. 18, 2004
Svein Erling Johnstad, Bønes, NO;
Svein Erling Johnstad, Bønes, NO;
Norsk Hydro ASA, Olso, NO;
Abstract
The invention includes a geographical sensor apparatus for use under water in the sea, including a plurality of seismic sensors () for sensing seismic waves associated with underground formations, and a plurality of EM-sensors constituted preferably by electrodes () for sensing electromagnetic waves associated with the underground formations. In a preferred receiver cable configuration embodiment of the invention, the geophysical sensor apparatus includes a seismic receiver cable with a linear array of a plurality of seismic sensors () and EM-sensors arranged inside a flexible outer skin (), with the EM-sensors having electrodes on the outside of the outer skin. The cable is operated on the seafloor by a surface vessel, the vessel towing an electromagnetic transmitter antenna in addition to the seismic source.