G - Physics – 01 – V
Patent
G - Physics
01
V
349/10
G01V 1/22 (2006.01) G01V 1/20 (2006.01)
Patent
CA 1081838
COMBINATION FLYER-JUMPER AND METHOD OF MANUFACTURE OF SAME IN WHICH THE JUMPER/FLYER IS ASSOCIATED WITH A GEOPHYSICAL DATA ACQUISITION SYSTEM THAT PROVIDES DIGITAL DATA IN THE FIELD BEFORE RECORDING ABSTRACT OF THE DISCLOSURE The method and apparatus of the present invention are described in which connection (and disconnection) of a plurality of geophones associated with a digital seismic data acquisition system is greatly simplified without sacrificing flexibility as to the number of geophone flyers per station or the interval spacing per station and also without the addition of separate subcabling in the internal linkage of the flyers to the field digitizing equipment. The apparatus includes a multiple-phone flyer-jumper connected to each channel of a remote data acquisition and telemetering circuit (RDATC). The latter in turn is linked to a central control and recording station usually located in a truck. Each RDATC acts in combination with a group of geophone flyers, say four, to store, amplify, filter, gain control and digitize analog data from the flyers and then telemeter the data to recording circuitry in the field truck. In accordance with the present invention, each jumper-flyer includes a central multi-conductor cable segment of say N+1 conductors where N is an even greater positive number than two, such as 4, - 1 - 6, etc., terminating at each of its ends in the central leg of a multi-armed connector. A plurality of series/parallel connected geophones, say 9 in number are used in combination with the central segment. At the end of the arms of each multi-armed connector pass another conductor cable segment (similar to the central segment, but called the "branch cable segment") in which only two fo the cables are actively connected to the selected conductor pairs of the central segment. At the other end of each branch cable is a two pin-two recepticle hermaphroditic connector. Each connector allows either (i) three geophone conductors of the central cable segment or (ii) at least the remaining conductor pairs, to be flexibly connected to outside circuits including the RDATC to actively transfer data from the internally based geophones, or from more remotely located geophones located adjacent to the flyers of interest, respectively.
281494
Chevron Research And Technology Company
Sim & Mcburney
LandOfFree
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