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    TEMPERATURE COMPENSATED PARABOLIC SKEW ESTIMATION FOR CLOCKS ON AN AUTONOMOUS SEISMIC NODE
    32.
    发明申请
    TEMPERATURE COMPENSATED PARABOLIC SKEW ESTIMATION FOR CLOCKS ON AN AUTONOMOUS SEISMIC NODE 审中-公开

    公开(公告)号：US20190094402A1

    公开(公告)日：2019-03-28

    申请号：US16141366

    申请日：2018-09-25

    Applicant: Seabed Geosolutions B.V.

    Inventor： Timothy John Bunting ,  Bjarne Isfeldt

    IPC: G01V1/38 ,  G06F1/10

    Abstract: Disclosed is a method for determining skew measurements for clock errors in an autonomous seismic node. A parabolic fit may be used to estimate the clock drift of an ocean bottom seismic node during node deployment. A temperature and/or frequency trend and a real-time temperature measurement may be used to compute a temperature corrected parabolic trend. The temperature and/or frequency trend may be measured in a laboratory on a node by node basis or it may be a single trend that is suitable for all nodes. The method may include measuring clock skew prior to node deployment and after node recovery, correcting the pre and post deployment skew measurements based on a temperature and/or frequency trend and/or to a constant reference temperature, and/or computing a parabolic trend of the skew measurements of the clock based on the temperature corrected pre and post deployment skew measurements.

    UNDERWATER VEHICLE DOCKING SYSTEM
    34.
    发明申请
    UNDERWATER VEHICLE DOCKING SYSTEM 审中-公开

    公开(公告)号：US20180162503A1

    公开(公告)日：2018-06-14

    申请号：US15836734

    申请日：2017-12-08

    Applicant: Seabed Geosolutions B.V.

    Inventor： Brendan James Reid ,  Benjamin Jeremy Ash

    IPC: B63G8/00

    CPC classification number: B63G8/001 ,  B63B2211/02 ,  B63G2008/007 ,  B63G2008/008

    Abstract: Apparatuses, systems, and methods for the docking of an underwater vehicle (such as a ROV) to a subsea structure (such as a basket or cage) for the transfer of payload devices, such as ocean bottom seismic nodes. The ROV may have a docking probe that is rotatable between an extended and retracted position by a rotatory actuator. The subsea structure may have a docking receptacle that receives the docking probe while the probe is in an extended position. The docking probe and receptacle can latch and/or be secured together by a variety of mechanisms. Once secured, the docking probe can rotate thereby changing the relative positions (horizontal and/or vertical) of the ROV and the subsea structure. The underwater vehicle may have an elevator mechanism that may move vertically and/or horizontally and that is coupled to a handler or grabber for handling and/or transfer of the payload devices.

    Overboard system for deployment and retrieval of autonomous seismic nodes
    35.
    发明授权
    Overboard system for deployment and retrieval of autonomous seismic nodes 有权

    公开(公告)号：US09995836B2

    公开(公告)日：2018-06-12

    申请号：US15290533

    申请日：2016-10-11

    Applicant: Seabed Geosolutions B.V.

    Inventor： Arne Henning Rokkan ,  Richard Edward Henman ,  Leif Johan Larsen ,  Johan Fredrik Naes ,  Mariann Ervik ,  Ole-Fredrik Semb

    IPC: G01V1/38 ,  B63B35/04

    CPC classification number: G01V1/3852 ,  B63B35/04 ,  G01V1/3843

    Abstract: Embodiments of systems and methods for deploying and retrieving a plurality of autonomous seismic nodes from the back deck of a marine vessel using an overboard node deployment and retrieval system are presented. The overboard system may comprise one or more overboard wheels that are actively powered to move in response to changes in movement of the deployed cable. The overboard system may comprise a first overboard wheel with a plurality of rollers and a second overboard wheel configured to detect movement and/or changes in a position of the deployment line. The overboard system may be configured to move the first overboard wheel in response to movement of the second overboard wheel. In addition, the first overboard wheel may comprise at least one opening or pocket configured to hold a node while the node passes across the wheel. Other seismic devices may also pass through the overboard system, such as transponders and weights attached to the deployment cable.

    DEPLOYMENT AND RETRIEVAL OF SEISMIC AUTONOMOUS UNDERWATER VEHICLES
    36.
    发明申请
    DEPLOYMENT AND RETRIEVAL OF SEISMIC AUTONOMOUS UNDERWATER VEHICLES 审中-公开

    公开(公告)号：US20180141628A1

    公开(公告)日：2018-05-24

    申请号：US15874270

    申请日：2018-01-18

    Applicant: Seabed Geosolutions B.V.

    Inventor： Arne Henning Rokkan ,  Geir Valsvik ,  Bjarne Isfeldt ,  Jean-Baptiste Danre

    IPC: B63G8/00 ,  G01V1/38 ,  B63B27/16

    CPC classification number: B63G8/001 ,  B63B27/16 ,  B63B2027/165 ,  B63G2008/007 ,  G01V1/3852

    Abstract: Apparatuses, systems, and methods for the deployment of a plurality of autonomous underwater seismic vehicles (AUVs) on or near the seabed based on acoustic communications with an underwater vehicle, such as a remotely operated vehicle. In an embodiment, the underwater vehicle is lowered from a surface vessel along with a subsea station with a plurality of AUVs. The AUVs are configured to acoustically communicate with the underwater vehicle or a second surface vessel for deployment and retrieval operations. The underwater vehicle and/or second surface vessel is configured to instruct the AUVs to leave the subsea station or underwater vehicle and to travel to their intended seabed destination. The underwater vehicle and/or second surface vessel is also configured to selectively instruct the AUVs to leave the seabed and return to a seabed location and/or a subsea station for retrieval.

    WAVEGATE FOR A SEISMIC SURFACE VESSEL
    37.
    发明申请
    WAVEGATE FOR A SEISMIC SURFACE VESSEL 审中-公开

    公开(公告)号：US20180052246A1

    公开(公告)日：2018-02-22

    申请号：US15681979

    申请日：2017-08-21

    Applicant: Seabed Geosolutions B.V.

    Inventor： Martin John Hartland

    IPC: G01V1/38

    CPC classification number: G01V1/3843 ,  B63B19/08 ,  B63B2019/086 ,  B63B2035/007 ,  G01V1/168 ,  G01V1/3808 ,  G01V1/3817 ,  G01V1/3852 ,  G01V2210/1427

    Abstract: One or more wavegates are located on a seismic surface vessel to substantially prevent or limit waves from crashing onto a back deck of the vessel. The wavegate may comprise one or more steel gates or doors located at or near the aft portion of the vessel, such as on or near the rear end of the back deck, that may be moveable between a closed position and an open position. Each door may be fixed in position and/or be rotated and/or moveable in a horizontal and/or vertical direction between different positions. The wavegate allows the surface vessel to travel backwards and/or in the face of incoming waves while substantially preventing and/or limiting waves from crashing onto the back deck of the marine vessel. The seismic surface vessel may be a deployment vessel or a hybrid seismic shooting and deployment vessel or another marine surface vessel.

    Touch down monitoring of an ocean bottom seismic node
    38.
    发明授权
    Touch down monitoring of an ocean bottom seismic node 有权

    公开(公告)号：US09891333B2

    公开(公告)日：2018-02-13

    申请号：US14925758

    申请日：2015-10-28

    Applicant: Seabed Geosolutions B.V.

    Inventor： Geir Valsvik ,  Arne Henning Rokkan ,  Jean-Baptiste Danre ,  Bjarne Isfeldt

    IPC: G01V1/38 ,  B63G8/00

    CPC classification number: G01V1/3852 ,  B63G8/001 ,  G01V1/3835

    Abstract: Apparatuses, systems, and methods for guiding and/or positioning a plurality of seismic nodes on or near the seabed by an autonomous underwater vehicle (AUV) or a remotely operated vehicle (ROV). In one embodiment, an underwater vehicle is configured to monitor the deployment of cable connected to a plurality of seismic nodes, including the touchdown monitoring, positioning, and guiding of deployed autonomous seismic nodes or ocean bottom cable. The underwater vehicle may comprise a propulsion system configured to steer and propel the vehicle in a body of water, a tracking system configured to automatically track the cable and/or attached seismic nodes, and a guidance system configured to communicate with a surface vessel node data in real time or near real time for active guidance and/or positioning of the deployment cable.

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