Assembly for drilling low pressure formation

Details Assembly for drilling low pressure formation Assembly for drilling low pressure formation

E - Fixed Constructions

21

B

E21B 21/12 (2006.01) E21B 4/00 (2006.01) E21B 21/08 (2006.01) E21B 33/10 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2459733

The invention relates to a drilling assembly for drilling a borehole into geological formations which assembly comprises: a drilling shaft placable in the borehole, which shaft comprises a drilling head and a pump device placable in the borehole, wherein the pump device comprises sealing means for sealing a first borehole part below the sealing means from a second borehole part above the sealing means, and wherein the pump device is enabled to pump a fluid from the first borehole part to the second borehole part.

L'invention concerne un ensemble forage pour forer un trou de forage dans des formations géologiques, qui comprend un corps de sonde que l'on peut placer dans le trou de forage, le corps de sonde comprenant une tête de forage; et un dispositif de pompage que l'on peut placer dans le trou de forage, ledit dispositif comprenant un moyen d'étanchéité qui rend étanche une première partie du trou de forage au-dessous du moyen d'étanchéité par rapport à une seconde partie du trou de forage au-dessus dudit trou de forage, ce qui permet au dispositif de pompage de pomper un liquide de la première partie du trou de forage vers la seconde partie du forage.

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