Earth formation surveying device

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 7/00 (2006.01) E21B 4/18 (2006.01) E21B 7/26 (2006.01) E21B 17/07 (2006.01) E21B 17/22 (2006.01) E21B 47/00 (2006.01) E21B 49/02 (2006.01) E21B 49/06 (2006.01)

Patent

CA 2289129

A survey device for use in a borehole formed in an earth formation is disclosed. The device comprises a carrier body (1) carrying earth formation survey means (28, 30) and drilling means (9) arranged at the front end of the device for drilling of the borehole, means for progressing the carrier body through the borehole in correspondence with progress of drilling by the drilling means, and means (22, 24) for removing the rock particles resulting from the drilling process. The means for removing the rock particles comprises means for transporting the rock particles to the rear end (16) of the device and depositing the rock particles into the borehole behind the rear end of the device.

On décrit un dispositif de surveillance destiné à être utilisé dans un trou de sonde pratiqué dans une formation géologique. Le dispositif comprend un corps (1) faisant office de support qui porte des dispositifs (28, 30) de surveillance de la formation géologique et un dispositif de forage (9) disposé à l'extrémité avant du dispositif qui sert à forer le trou de sonde; un dispositif qui permet de faire avancer l'élément porteur dans le trou de sonde parallèlement à la progression du forage effectué par le dispositif de forage et un dispositif (22, 24) servant à enlever les parties de roches produites par le processus de forage. Le dispositif servant à éliminer les parties de roches comprend un système qui transporte les roches vers l'extrémité arrière (16) du dispositif et qui dépose ces mêmes roches dans le trou de sonde derrière l'extrémité arrière du dispositif.

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