Input/output, Inc.

Shell Oil Comapny

Ion Geophysical Corporation

Eugene D Bednar

Keith Elder

Dale J Lambert

Peter Maxwell

Lawrence Philip Behn

David M Wilson

Henry Thomas Polk

Michael Arthur Corrigan

Glen Ragan

Wilfred Bertrand

Byron Cain

Jeffery C Gannon

Steven L Roche

Michael George McMahon

John C Downey Jr

Method for operating and testing a sensor assembly (). The sensor assembly () preferably includes accelerometers with axes of sensitivity orthogonal to each other. The method preferably includes determining sensor tilt angle, determining the position of the sensor, and synchronizing the operation of the sensor.

Accelerometer transducer used for seismic recording

A hydrophone assembly is provided that has a frequency response that matches that of an accelerometer. In a preferred implementation, the frequency response resembles that of a differentiator in combination with a pair of simple lags.

Hydrophone assembly

Remote seismic data acquisition unit for receiving seismic radio signals, having the capability of receiving both seismic data acquisition radio signals and GPS signals, uses a single antenna for receiving both types of signals, a signal splitter to separate the signals and a low noise amplifier to enhance the GPS signals. A GPS receiver/transmitter is incorporated within the housing for the seismic data acquisition system radio signal receiver.

Remote seismic data acquisition unit with common radio and GPS antenna

A checker is provided that attaches to a seismic cable and provides an audible output in response to a mechanical impulse when the polarity of the geophones in that cable are correct. Methods for checking geophones and their polarity and alternative apparatus are provided.

Geophone checker

A checker is provided that attaches to a seismic streamer cable section and provides an audible output in response to a pressure pulse when the polarity of the hydrophones in that cable section are correct. Methods for checking a hydrophone and its polarity and alternative apparatus are also provided.

Hydrophone checker

Growing community of inventors

Houston, TX, United States of America

Eugene D Bednar