Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent
1996-11-07
1999-03-16
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
367154, 367157, 367163, 310337, H04R 1700, G01V 138
Patent
active
058838570
ABSTRACT:
The present invention provides a non-fluid-filled streamer cable or towed array for performing seismic surveys in water-covered areas. The streamer cable includes a plurality of serially coupled active cable sections. Each active cable section includes an electro-mechanical cable that contains a single central strain member. A wire bundle is placed around the central strain member for transporting electrical power and data through the active section. A nonconductive foam material is extruded around the central strain section to provide a predetermined buoyancy to the fully assembled active cable section. A number of hydrophones are formed around and outside the electro-mechanical cable. The hydrophone preferably includes a pair of active element connected in series opposition. The hydrophone is centrally located within an outer jacket formed over the hydrophone. Electronic components, such as pre-amplifiers, are placed within the hydrophones. The cable design provides for local hydrophone signal collection, signal conditioning, combination of multiple hydrophones into groups and placement of signals on a transmission or data line to the vessel recording system within the attachment to the cable.
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Innovative Transducers Incorporated
Lobo Ian J.
LandOfFree
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