System for controlling streamers
First Claim
1. A system for controlling cables and streamers in a seismic tow arrangement comprisingat least one deflector (13) connected to one side of a tow vessel (10) by at least one tow wire (12), wherein the deflector is located at a position with a distance perpendicular to the direction of movement (5) of the tow vessel, the vessel being equipped with a navigation system (32) for measuring the position of the vessel,a command unit (31) anda plurality of control units (33), the control units being located on at least some of the streamers (14) and being adapted to measure and report their own positions,wherein the command unit (31) comprisesmeans for calculating deviation in the position of the tow vessel;
- means for receiving position information from each control unit (33); and
means for calculating deviations from predetermined positions of the control units, based upon the received position information from the control units,and the system comprisesmeans for changing the position of the streamers in order to restore the positions of the control units, to maintain the streamer at a given depth and position, including control devices for varying the length of the tow wire (12), to vary the transverse position of the deflector (13) with respect to the vessel (10), based upon the received position information from the control units and the calculated deviation in the position of the tow vessel,and means for coordinating the control units in changing the position of the streamers.
1 Assignment
0 Petitions
Accused Products
Abstract
System for controlling cables and streamers in a seismic tow arrangement comprising at least one deflector (13) connected to one side of a tow vessel (10) via at least one wire (12), leading or the like, wherein the deflector is located in a position at a distance perpendicularly to the direction of movement (5) of the tow vessel, the vessel being equipped with a navigation system for measuring the position of the vessel. The system is characterised by comprising a command unit and a number of control units, where the control units are located on at least some of the streamers and are adapted to measure and report about their positions, that the command unit comprises means for receiving the position information from each individual control unit and calculation of possible deviations from predetermined positions, and that the system comprises means for changing the position of the streamers for re-establishing the positions of the control units.
57 Citations
13 Claims
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1. A system for controlling cables and streamers in a seismic tow arrangement comprising
at least one deflector (13) connected to one side of a tow vessel (10) by at least one tow wire (12), wherein the deflector is located at a position with a distance perpendicular to the direction of movement (5) of the tow vessel, the vessel being equipped with a navigation system (32) for measuring the position of the vessel, a command unit (31) and a plurality of control units (33), the control units being located on at least some of the streamers (14) and being adapted to measure and report their own positions, wherein the command unit (31) comprises means for calculating deviation in the position of the tow vessel; -
means for receiving position information from each control unit (33); and means for calculating deviations from predetermined positions of the control units, based upon the received position information from the control units, and the system comprises means for changing the position of the streamers in order to restore the positions of the control units, to maintain the streamer at a given depth and position, including control devices for varying the length of the tow wire (12), to vary the transverse position of the deflector (13) with respect to the vessel (10), based upon the received position information from the control units and the calculated deviation in the position of the tow vessel, and means for coordinating the control units in changing the position of the streamers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification