A device for a borehole arrangement

Details A device for a borehole arrangement A device for a borehole arrangement

E - Fixed Constructions

21

B

E21B 17/18 (2006.01) E21B 7/20 (2006.01)

Patent

CA 2629607

A device for a borehole arrangement, in which a casing (11) for a borehole (3) is formed of at least one casing section (11a) , and in which there is placed at a downhole end portion (11b) of the casing (11) at least one downhole tool (21), for example a drilling tool, characterized in that the casing (11) is provided with two or more pipe bores (12, 13a, 13b), each separately extending continuously through a substantial part of the length of the casing (11) and being separated in a fluid-tight manner from adjacent pipe bores (12, 13b, 13a) and from an external annulus (14) defined by the external mantle surface of the pipe (11) and a borehole wall (5a).

Dispositif pour un agencement de trou de sonde dans lequel un tubage (11) pour un trou de sonde (3) est formé d~au moins une section de tubage (11a), et dans lequel au moins un outil de fond (21) est placé au niveau d~une partie d~extrémité de fond (11b) du tubage (11), ledit outil pouvant être un outil de forage, caractérisé en cela que le tubage (11) est doté de deux alésages de tuyaux (12, 13a, 13b) ou plus qui se prolongent chacun séparément de manière continue sur une grande partie de la longueur du tubage (11) et qui sont séparés, de manière à être étanches aux fluides, des alésages de tuyaux adjacents (12, 13b, 13a) et d~un anneau externe (14) défini par la surface de paroi externe du tuyau (11) et une paroi de trou de forage (5a).

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