Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent
1987-08-24
1989-05-16
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
114242, 114245, 114246, 114254, 181110, 181140, 367 18, 367 20, 254266, G01V 138, B63B 2116
Patent
active
048315990
ABSTRACT:
A float for use in seismic surveys of the sea bed supports a plurality of seismic pulse transmitters (6) which are suspended on lines (7) beneath the float (1). At a distance from the front end of the float (1), on one sidewall thereof, a fastening device for a towing cable and a lead-in for control lines and lines for supplying operating medium to the pulse transmitters are provided. These lines and cables are gathered in a common line (3) which extends behind the tow ship. The line (3), at a distance away from the float (1), is connected to a line (4) which leads to a length-regulating device (12) inside the front section of the float. The float is also provided with at least one motor (10) with a drive shaft (9)leading to hoisting drums (8) for the lines (7) to the respective seismic pulse transmitters (6). Both the motors (10, 12) and the seismic pulse transmitters (6) are connected to the pneumatic supply line. The control lines leads to control devices at the separate components, permitting active steering of the system from on board the ship.
REFERENCES:
patent: 3581273 (1971-05-01), Hedberg
patent: 3611977 (1971-10-01), Mosvold
patent: 3718207 (1983-02-01), Barb
patent: 4552086 (1985-11-01), Boe et al.
patent: 4716553 (1987-12-01), Dragsund et al.
Dragsund Inge
Gjestrum Einar
Geophysical Company of Norway A.S.
Steinberger Brian S.
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