A process for installing seismic sensors inside a petroleum production well equipped with a cemented casing involves arranging the seismic sensors along an outer surface of the casing before being descended into a drilled well and cementing a ring-shaped space between the casing and the well so as to...http://www.google.ca/patents/US4775009?utm_source=gb-gplus-sharePatent US4775009 - Process and device for installing seismic sensors inside a petroleum production well
