Communications: electrical – Wellbore telemetering or control – In horizontal or inclined passage arrangement
Patent
1996-10-15
1998-09-01
Eldred, J. Woodrow
Communications: electrical
Wellbore telemetering or control
In horizontal or inclined passage arrangement
181108, 181112, 181122, 7315217, G01V 140
Patent
active
058016422
ABSTRACT:
The invention relates to a device for exploring an underground formation crossed by a well, suited to work in well portions where the advance thereof under the effect of gravity is difficult, notably in horizontal well portions or in well portions greatly inclined to the vertical. A plurality of rigid exploration modules (Mi) are interconnected end to end, each one including a rigid pipe (1), a flexible leaf (11) fastened to each pipe (1) so as to press against the wall of the well at least one box (18) containing sensitive elements, a linking cable (32) connected to a surface central station (40), and a connecting block (26) comprising an acquisition system (37) connected to the various modules (M1-Mn) by a bundle of electric conductors running through the tubular elements (1), and a deferred electric connection useful in damp conditions between linking cable (32) and the acquisition system. The connecting block is interposed between the array of exploration modules (M1-Mn) and a rigid string (39) connected to the surface operating device (38) for driving the exploration assembly into the well portion. The invention may be used for seismic prospecting for example.
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Eldred J. Woodrow
Institut Francais du Pe'trole
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