Method of towing sources of seismic energy behind a vessel, and

Details Method of towing sources of seismic energy behind a vessel, and Method of towing sources of seismic energy behind a vessel, and

1991-04-09

1992-10-20

Eldred, J. W.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367 16, 367106, 367144, 181110, 114244, 114245, G01V 138

Patent

active

051576368

ABSTRACT:
In towing sources of seismic energy behind a vessel, especially in connection with seismic surveys in waters which are covered with ice, the buoyancy floats and also the sources of seismic energy are readily influenced by broken up ice collecting behind the icebreaking towing vessel. In order to stabilize the tow of sources of seismic energy a towing line (7) is secured between the buoyancy means (4) belonging to the tow of sources of energy (3) and the vessel (1) at a point (10) which is located in the area of the waterline, so that towing line (7) will extend in the area of the waterline. Another towing line (8) is connected directly with the array of sources of seismic energy (5) and is secured to a towing point (11) on the vessel (1) located below the waterline. An arrangement is also disclosed for securing the towing line (8) in a suitable location to avoid influence from ice and, furthermore, the design of floats (4) avoids influence from the ice.

REFERENCES:
patent: 2610240 (1952-09-01), Pottorf
patent: 3437987 (1969-04-01), Burg
patent: 3496526 (1970-02-01), Rockwell
patent: 4748599 (1988-05-01), Gjestrum et al.
patent: 4984218 (1991-01-01), Ritter et al.

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