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Seabed seismic node system

A node and node deployment technology, applied in seismology, seismology for areas covered by water, geophysical surveying, etc., can solve the problems of positioning tolerance, loose nodes, expensive seismic nodes, etc.

Pending Publication Date: 2022-03-22
MAGSEIS FAIRFIELD ASA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Placing seismic nodes on the seafloor is expensive and time consuming, and weather and / or seafloor conditions and obstructions can limit the time available for data acquisition, and this can lead to problems with having enough power to run all the electronics and other issues, such as positioning tolerances , bad connections, loose nodes, etc.

Method used

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  • Seabed seismic node system
  • Seabed seismic node system
  • Seabed seismic node system

Examples

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Embodiment Construction

[0043] exist figure 1 In , an ROV 10 having a front end 12 and a rear end 14 is shown. At the rear end of the ROV, thrusters 15 for propulsion are arranged. As is known, ROVs can be autonomous ROVs or controlled using umbilical cables. exist figure 1 In , a node reclaimer module 30 and a node containment module 50 are shown attached to the underside of the ROV. A bucket 32 ​​is shown at the front of the reclaimer module, the purpose of which will be described later. The node housing module also has means to enable deployment of the node to the seabed.

[0044] figure 2 The ROV is shown with side hatches 16, 17 which open to show the buoyancy tank 18 as part of the variable buoyancy system. This system is used to adjust the ROV to compensate for load changes when deploying or recovering modules.

[0045] image 3 A node module according to the invention is shown in the form of a container 50 with an outer shell 51 for structural strength. The module includes a front e...

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Abstract

Systems for deploying and retrieving seismic nodes at the sea floor are described. The system uses a modular container that can be connected to a remote operated vehicle (ROV). The container includes a magazine for storing a plurality of individual nodes and has means for moving the nodes through the magazine to the sea floor.

Description

technical field [0001] The invention relates to the field of marine seismic exploration. More specifically, the present invention relates to a system for deploying and recovering a seismic node by a Remotely Operated Vehicle (ROV). Background technique [0002] Marine seismic surveys involve firing arrays of acoustic sources at known locations. Sound waves travel through the water into the subsurface formations where they reflect and refract from various layers in the formation. Reflected and refracted waves are detected and recorded for later analysis to provide information about subsurface structures or formations. [0003] In order to detect as many reflected and refracted waves as possible, seismic sensors such as geophones must be placed in close acoustic contact with the seafloor, with hydrophones positioned directly above the seafloor. Seismic sensors are typically arranged in seismic nodes, each node comprising one or more seismic sensors. [0004] In recent year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/38
CPCG01V1/3852B63G8/001B63G2008/005G01V1/3835
Inventor 比约恩·延森佩尔·克里斯蒂安·格吕特内斯芒努斯·林德贝里奥德比约恩·格拉夫达尔塞巴斯蒂安·索利
Owner MAGSEIS FAIRFIELD ASA