Device for sealing a bore hole and discharging drill...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 21/01 (2006.01) E21B 17/00 (2006.01) E21B 21/015 (2006.01) E21B 33/08 (2006.01)

Patent

CA 2408975

In a device for sealing a bore hole and discharging drill cuttings and stripped excavation material, including a housing adapted to receive sealing elements and an opening capable of being connected to the bore hole, one side wall of the housing is provided with at least one opening for the connection of a haulage duct, wherein the housing end side facing the bore hole is equipped with a lockable, particularly screwable, sealing flange (13) for the detachable connection with a bore hole lining (11). The sealing flange (13) is rotationally and sealingly mounted within the housing and carries projections, in particular an annular brim (15) which is overlapped by a stop (14) of the housing.

L'invention concerne un dispositif pour étanchéifier un trou de forage et pour enlever des déchets de forage ou un matériau d'exploitation détaché, qui comprend un logement destiné à recevoir des éléments d'étanchéité et comporte une ouverture pouvant être raccordée au trou de forage. Une paroi latérale de ce logement présente au moins un passage servant au raccordement d'une conduite d'extraction, la face du logement tournée vers le trou de forage étant pourvue d'une collerette d'étanchéité (13) verrouillable, en particulier vissable, pour le raccordement libérable avec une gaine de trou de forage (11). Cette collerette d'étanchéité (13) est montée rotative et de façon étanche dans le logement et elle porte des saillies, en particulier un bord annulaire (15) sur lequel vient se loger une butée (14) du logement.

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