Device and method for positioning of towing systems for use in marine seismic surveys
First Claim
1. A device for positioning of seismic equipment in a desired underwater position when towed by a seismic vessel, said device including a mechanism for placement underwater and for maintaining said desired underwater position, said mechanism comprising:
- a body part equipped with wings and rudders,a control body for controlling the wings and rudders so as to achieve said desired underwater position,instruments for use in positioning the device in said desired underwater position,a communication system for communicating between the seismic vessel and the device,a control unit for processing signals which operate on the basis of information from at least one of two locations, said two locations consisting of the seismic vessel and said instrumentsan attachment device for at least one cable and at least one float, anda power supply system.
3 Assignments
0 Petitions
Accused Products
Abstract
A positioning device for seismic equipment which is towed by a seismic vessel is designed with a body part which is equipped with wings (7) and rudders (8, 6, 9, 5). For the control of wings (7) and rudders (8, 6, 9, 5) control means, preferably hydraulic or electrical means are used. The device further comprises a control unit for processing of signals which preferably operate exclusively on the basis of information from the vessel or the ship, instruments for use in the positioning of the device and a communication system for the communication between the vessel and the device and vice versa, preferably electrical, acoustic or optical. It is further equipped with attachment devices for one or more cables (26) and floats, which are preferably provided at the front of the device, and preferably in the vicinity of the wing'"'"'s (7) attachment point to the device'"'"'s body part as well as a power supply system.
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Citations
24 Claims
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1. A device for positioning of seismic equipment in a desired underwater position when towed by a seismic vessel, said device including a mechanism for placement underwater and for maintaining said desired underwater position, said mechanism comprising:
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a body part equipped with wings and rudders, a control body for controlling the wings and rudders so as to achieve said desired underwater position, instruments for use in positioning the device in said desired underwater position, a communication system for communicating between the seismic vessel and the device, a control unit for processing signals which operate on the basis of information from at least one of two locations, said two locations consisting of the seismic vessel and said instruments an attachment device for at least one cable and at least one float, and a power supply system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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9. A method for positioning of seismic equipment in a desired underwater position when towed by a seismic vessel, said method comprising the steps of:
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attaching a positioning device to a front part of a towing cable, said positioning device including a mechanism for placement underwater and for maintaining said desired underwater position, said mechanism comprising; a body part equipped with wings and rudders, a control body for controlling the wings and rudders so as to achieve said desired underwater position, instruments for use in positioning the device in said desired underwater position, a communication system for communicating between the seismic vessel and the device, a control unit for processing signals which operate on the basis of information from at least one of two locations, said two locations consisting of the seismic vessel and said instruments, an attachment device for at least one cable and at least one float, and a power supply system; placing said positioning device underwater; and controlling said positioning device using control signals which are calculated in at least one of said two locations, said controlling of said positioning device being performed so that said positioning device achieves the desired underwater position. - View Dependent Claims (10, 21, 22, 23, 24)
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Specification