Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Reexamination Certificate
2007-05-29
2007-05-29
Hellner, Mark (Department: 3663)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
C367S016000
Reexamination Certificate
active
11314381
ABSTRACT:
Arrangement for use for seismic surveys of geological formations in a seabed, where a plurality of such arrangements, which are provided with sensor units26, are placed on the seabed for collecting pressure waves and shear waves reflected from the geological formations. There exist arrangements for transferring seismic data to a surface receiver placed on a vessel, an offshore installation, or an onshore installation. Each sensor unit26is held by a carrier10and is connected to a cylindrically skirt-shaped structure19adapted to be led down into the seabed, and each sensor unit26comprises at least one geophone. The carrier10comprises a holder12for the cylindrically skirt-shaped structure19, which structure19shall penetrate down into the seabed, as this holder12is adapted to be moved between a lower position and an upper position, to be able to be mechanically released from the skirt-shaped structure19.
REFERENCES:
patent: 4516227 (1985-05-01), Wener et al.
patent: 5253223 (1993-10-01), Svenning et al.
patent: 6657921 (2003-12-01), Ambs
patent: WO 2004/053526 (2004-06-01), None
patent: WO 2005/071442 (2005-08-01), None
Adams Thomas L.
Hellner Mark
Seabed Geophysical AS
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