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    SEISMIC DATA ACQUISITION WITH EXTENDED DYNAMIC RANGE
    2.
    发明公开
    SEISMIC DATA ACQUISITION WITH EXTENDED DYNAMIC RANGE 审中-公开

    公开(公告)号：EP4198578A1

    公开(公告)日：2023-06-21

    申请号：EP22211139.5

    申请日：2022-12-02

    申请人： PGS Geophysical AS

    发明人： FERNIHOUGH, Robert Alexis Peregrin

    IPC分类号： G01V1/24

    摘要： A marine seismic data acquisition apparatus is provided, comprising: a sensor, a first data acquisition subchannel configured to exhibit a first gain and comprising a first subchannel input, and a second data acquisition subchannel configured to exhibit a second gain lower than the first gain. The sensor output and first and second input protection circuits are configured such that neither the first input protection circuit nor the second input protection circuit will activate when seismic energy reaching the sensor has a peak amplitude less than a first threshold level. The internal input protection circuit is configured to activate when seismic energy reaching the sensor has a peak amplitude greater than a second threshold level, wherein the second threshold level is lower than the first threshold level.

    MEDETOMIDINE COMPOSITIONS HAVING IMPROVED ANTI-FOULING CHARACTERISTICS
    4.
    发明公开
    MEDETOMIDINE COMPOSITIONS HAVING IMPROVED ANTI-FOULING CHARACTERISTICS 审中-公开

    公开(公告)号：EP3671287A1

    公开(公告)日：2020-06-24

    申请号：EP19217617.0

    申请日：2019-12-18

    申请人： PGS Geophysical AS

    发明人： Vasbo, Christian ,  Tonnessen, Rune

    IPC分类号： G01V1/38 ,  C09D5/16

    摘要： Embodiments generally relates to marine geophysical surveying. More particularly, the present disclosure relates to treatment of geophysical equipment with medetomidine compounds for reduction of marine growth. A method may comprise combining at least a medetomidine compound and a wax to form a mixture; and forming an outer layer (22) disposed on a marine geophysical equipment, wherein the outer layer comprises the mixture of the medetomidine compound and the wax.

    ANGLE ADJUSTMENT OF A DEFLECTOR RELATIVE TO A MARINE SURVEY VESSEL
    5.
    发明公开
    ANGLE ADJUSTMENT OF A DEFLECTOR RELATIVE TO A MARINE SURVEY VESSEL 审中-公开

    公开(公告)号：EP3671286A1

    公开(公告)日：2020-06-24

    申请号：EP19217410.0

    申请日：2019-12-18

    申请人： PGS Geophysical AS

    发明人： Lindberg, Daniel

    IPC分类号： G01V1/38 ,  A01K73/045

    摘要： A system for bridle bite adjustment can include a tow rope (201-1) coupled to a paravane (205-1) at a first position on a lever arm (219) and a spur line (211) coupled to the paravane at a second position on the lever arm. The system can also include a winch (203) to adjust a deployed length of the tow rope. The tow rope and the lever arm can adjust a bridle bite of the paravane by when the deployed length of the tow rope is adjusted by the winch, thereby balancing tension between the tow rope and the spur line.