Pgs Americas, Inc.

Geco A.s.

Kjt Enterprises, Inc.

Seafloor Geophysical Solutions As

Precision Seismic, Inc.

Ian McMillan

Steven James Maas

D Richard Metzbower

Kurt M Strack

Stefan L Helwig

Rolf Ronningen

Nils Erik Jacobsen

Thomas Hills

Anno Sauer

Terje Nalum

Richard Bale

Michael Russell

A system () for attaching a plurality of seismic nodes () along a main carrier rope (). The main carrier rope is made of steel or synthetic fiber, and comprises no power or communication lines. The system has a length measuring device () for providing a measured length (L) of deployed main carrier rope (); a data source () for providing positioning data affecting the rope position of each seismic node () on the main carrier rope (); a control unit () for providing an attachment command whenever the measured length (L) corresponds to a rope position of a seismic node () computed from the positioning data; and a node attaching unit () for attaching a seismic node () to the main carrier rope () in response to the attachment command. The system is capable of attaching nodes () with different node spacing between some or all nodes along the main carrier rope (). As the rope positions are determined by the measured length (L), the system automatically compensates for creep or stretch in the main carrier rope (). Attaching a seismic node () to the main carrier rope () at any rope position by means of a clamping device, a suspension device and a fly line is also disclosed.

System and method for deployment and retrieval of seismic nodes along a carrier rope

A sensor cable system for measuring electromagnetic response of the Earth's subsurface includes a sensor cable deployable on the bottom of a body of water. The sensor cable has a plurality of electromagnetic sensing devices thereon at spaced apart locations. A system control unit is in signal communication with the sensing elements. The system control unit includes a transceiver for communicating signals to and from a corresponding sensor cable system. The system control unit includes a global positioning system signal receiver. The system control unit includes a processor configurable to receive signals detected by sensing elements in the corresponding sensor cable system. The processor is configurable to compute stacked signals from the sensing elements in the sensor cable and from sensing elements in the corresponding system. The processor is configurable to calculate a statistical measure of the stacked signals. The system control unit is disposed in a flotation device.

Buoy-based marine electromagnetic signal acquisition system

A method and system for interrogating a seismic sensor in a seismic cable having modular sensing stations spaced along the seismic cable and a connection module head end of the sensor sections, that includes dropping, at the connection modules, a wavelength of light from an input bus telemetry fiber that includes multiple wavelengths of light, distributing the dropped wavelength of light to the seismic sensor, returning the dropped wavelength from the seismic sensor to a return telemetry fiber, remultiplexing the dropped wavelength of light onto the return bus telemetry, and amplifying, in the seismic cable, the returned dropped wavelength.

Fiber-optic seismic array telemetry, system, and method

A method for attaching seismic sensors in a seismic cable that includes a strength member inside a cable jacket with a fiber tube wound around the strength member and a sensor station base attached around the cable wherein the jacket is removed, at least one fiber tube is extracted and a seismic sensor is attached to the fiber tube.

An apparatus, system, and method are provided for interrogating of optical seismic sensors in a seismic cable. According to various example embodiments of the invention, distribution, return, and amplification of optical signals is performed near sensors for improvement of modularity of construction, signal-to-nose ratios, and simplicity of operations.

Method for acquisition of seismic data at sea

This invention relates generally to a method and system for synchronizing the timing of events between and among vessels using a common timing reference.

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Houston, TX, United States of America

Ian McMillan