Anordning for undersökelse av en undergrunnsformasjon som krysses av en horisontal brönn

摘要

- the invention relates to a device for scanning of an underground formation traversed by a well adapted to operate in the well portions where the advance thereof under the effect of gravity is difficult and in particular in the well portions which are horizontal or steeply inclined to the vertical. & br / - it comprises a plurality of rigid exploration modules (mi) interconnected end to end, each comprising a rigid rod (1), a flexible blade (11) fixed to each rod (1) in order to press against the wall of the well at least one housing (18) containing the sensitive elements, a connection cable (32) connected to a central station (40) at the surface; and a connecting block (26) comprising an acquisition system (37) is connected to the various modules (m1 - min) by a bundle of electric conductors passing through the interior of the tubular elements (1), and a deferred electric connection in a wet medium between the connection cable (32) and the acquisition system, the connecting block (26) being interposed between the assembly of the exploration modules (m1 - min) and a stiff tubing (39) connected to the control means (38) on the surface to drive the exploration assembly into the said portion of the well. (br / - application to the seismic prospection, for example.