Wells – With electrical means
Patent
1990-02-09
1991-01-22
Novosad, Stephen J.
Wells
With electrical means
367 25, 367 35, 181122, 73155, E21B 4700, E21B 4712, G01V 100
Patent
active
049863509
ABSTRACT:
For seismic monitoring of a petroleum deposit at least one signal receiving unit is fixed to an outside of a casing pipe before the casing plate is cemented in a borehole passing through the monitored zone.
At least one housing, defined by projecting elements, (longitudinal members, stops), is provided along an outer surface of the casing pipe, with the where the reception unit being embedded and fixed therein so as to protect the reception unit from shocks or compressive forces which may occur during lowering of the pipe into the well. Each reception unit comprises a support assembly with cavities for sensors, electronic cards for amplifying the signals delivered by the sensors and a sealed external case which is easy to position and which is held firmly in position by embedment in the housing. A multiconductor cable is used, for example, for connecting the reception unit to the surface.
REFERENCES:
patent: 2829190 (1958-04-01), Comlossy, Jr.
patent: 4200297 (1980-04-01), Tricon
patent: 4388969 (1983-06-01), Marshall et al.
patent: 4775009 (1988-10-01), Wittrisch et al.
patent: 4893290 (1990-01-01), McNeel et al.
Compagnie Generale de Geophysique
Institut Francais du Pe'trole
Novosad Stephen J.
Service Nationale Dit: Gaz de France
Societe Nationale Elf Aquitaine
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