Devices and methods for formation testing by measuring...

E - Fixed Constructions – 21 – B

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E21B 49/00 (2006.01)

Patent

CA 2692557

Device (1) for formation testing while drilling, comprising a drill string (2) with a packer (3) arranged on the drill-string above a drilling-bit (7), the packer can be expanded and thereby isolate a lower open part (6) of a well-bore, distinguished in that the packer is fastened sealingly but slideably on a distance (4) of the well-bore, such that the drill-string can be brought up and down, with or without rotation, within said distance while the packer stands stationary expanded in the well- bore, and the device comprises at least one pressure transmitter for measuring and transferring in real-time to the surface measured pressure in the isolated lower open part of the well-bore. Methods for formation testing utilizing the device. Device for formation testing of a production well.

L'invention concerne un dispositif (1) de test de formation en cours de forage, comprenant un train de tiges de forage (2) avec une garniture d'étanchéité (3) agencée sur le train de tiges de forage au-dessus d'un trépan (7), la garniture d'étanchéité pouvant être dilatée et pouvant ainsi isoler une partie ouverte inférieure (6) d'un puits de forage, se distinguant en ce que la garniture d'étanchéité est fixée de manière hermétique mais coulissante sur une distance (4) du puits de forage, de telle sorte que le train de tiges de forage peut être déplacé vers le haut et vers le bas, avec ou sans rotation, à l'intérieur de la distance tandis que la garniture d'étanchéité reste stationnaire et dilatée dans le puits de forage, le dispositif comprenant également au moins un transmetteur de pression pour mesurer et transférer en temps réel à la surface une pression mesurée dans la partie ouverte inférieure isolée du puits de forage. L'invention concerne également des procédés de test de formation utilisant ce dispositif. L'invention concerne un dispositif de test de formation d'un puits de production.

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