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1886 records (took 0.029 seconds)

    81.
    发明专利
    未知

    公开(公告)号：NO310251B1

    公开(公告)日：2001-06-11

    申请号：NO951852

    申请日：1995-05-10

    Applicant: WESTERN ATLAS INT INC

    Inventor： PRIEST JOHN F

    IPC: G01B17/02 ,  E21B47/00

    Abstract: The invention is a method of determining the thickness of a casing in a wellbore penetrating an earth formation using group delay determined casing resonance extracted from processed reflection signals from an acoustic pulse-echo imaging tool. A first Fourier transform coefficient series is calculated from the digitized reflection signal. Individual samples of the reflection signal are multiplied by their sample index values to obtain a modified digitized data string. A second Fourier transform coefficient series is calculated from the modified digitized data. The complex group delay function is calculated directly from the first and second Fourier coefficient series.

    82.
    发明专利
    未知

    公开(公告)号：NO20011852L

    公开(公告)日：2001-06-05

    申请号：NO20011852

    申请日：2001-04-10

    Applicant: WESTERN ATLAS INT INC

    Inventor： AMBS LORAN D

    IPC: B06B1/06 ,  G01V1/02 ,  G01V1/38 ,  G01V1/145 ,  G10K9/22

    Abstract: A seismic method and system for generating seismic source energy in marine geophysical operations. A slotted housing is moveable by the actuation of piezoelectric elements to generate high power, low frequency seismic source signals. When the piezoelectric elements are activated by electric power, displacement of such elements is enlarged by the slotted housing to generate a pressure pulse in the water. The invention permits single source pressure pulse generation having sufficient power and low frequency. The housing can be towed by a seismic vessel or can be integrated into a self-contained marine vehicle.

    DISPOSICION PARA SISMOS MARINOS Y METODO PARA ADQUIRIR DATOS SISMICOS
    86.
    发明专利
    DISPOSICION PARA SISMOS MARINOS Y METODO PARA ADQUIRIR DATOS SISMICOS 未知

    公开(公告)号：AR014209A1

    公开(公告)日：2001-02-07

    申请号：ARP980106719

    申请日：1998-12-29

    Applicant: WESTERN ATLAS INT INC

    IPC: G01V1/38 ,  G01V3/15

    Abstract: Una disposicion para sismos marinos y un método para adquirir datos sísmicos. La disposicion tiene una disposicion de mando y por lo menos unvehículo de remolque motorizado (con o sin tripulacion) con por lo menos un instrumento odisposi cion sísmica conectado al mismo, vehículo motorizadode remolque que tiene por fin selectivamente remolcar, por su propia potencia, al por lo menos un instrumento o disposicion sísmica. En un aspecto, dichoremolque se lleva a cabo enconjuncion contr olada con el desplazamiento de una o más naves anfitrionas. En otra aspecto, dicha disposicion para sismosmarinos incluye por lo menos un buque de servicio para brindar servicio al por lo menos un vehículo de remolquemotorizado.

    88.
    发明专利
    未知

    公开(公告)号：NO309165B1

    公开(公告)日：2000-12-18

    申请号：NO942079

    申请日：1994-06-03

    Applicant: WESTERN ATLAS INT INC

    Inventor： CHAMBERS RONALD E

    IPC: G01V1/34 ,  G01V1/28

    Abstract: A method for displaying seismic attributes in an open three-dimensional format is provided. The conventional two-dimensional variable-amplitude traces that represent the magnitude of a selected seismic attribute as a function of time are converted to three-dimensional format. The three-dimensional converted traces are hung beneath a model of their corresponding data-gathering stations to provide a forest of seismic traces in a wire-frame environment. The open configuration of the seismic traces permits the interpreter to see a perspective view of the structure of the subsurface of the earth from any desired viewing angle.

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