The Anaconda Company

Gus Manufacturing, Inc.

Carl F Mart

Douglas B Waits

Otice E Brown

Wesley L Joosten

John W Miller

A seismic prospecting roll along switching system using a relatively small number of switches to provide roll along prospecting while also providing variable gapping with minimum loss of active channels. In a simple form two sets of switches are provided with each set having one switch provided for each geophone input and with switch outputs connected in pairs, appropriately selected, to the inputs of signal processing channels. The two sets of switches are connected to the processing channels in a skewed or staggered manner with the amount of skew corresponding to a selectable gap. A controller is provided for electronically closing the appropriate switches from each set in accordance with the desired gap. Additional switch sets may be employed to provide additional selectable gaps while maintaining complete utilization of processing channels.

Variable gap roll along switching

A seismic communications system including a central control and recording station and a plurality of remote data acquisition stations, the stations being approximately in line and connected to each other by one or two transmission lines. One line is all that is necessary if the central station is at one end of the line of stations; however, if the central station has some acquisition stations upstream and some downstream therefrom, two lines are required. Coded central strobe bursts put on a transmission line at the central station successively cause insertion of digital seismic data from successively more remote acquisition stations, the data being time slotted after each central station strobe burst so that reverse transmissions do not interfere with subsequent signal propagations emanating from the central station. Twin lead is preferably used for the transmission lines. Power shut down, except for a pilot receiver, is accomplished at each acquisition station between recording cycles.

Growing community of inventors

El Paso, TX, United States of America

Carl F Mart