Method and apparatus for controlling the distribution of...

E - Fixed Constructions – 21 – B

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E21B 43/08 (2006.01) E21B 43/04 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2432892

The invention generally provides an apparatus and method for providing a more uniform gravel pack in the well bore. The apparatus (100) redirects slurry containing particulate matter, and comprises a wellscreen (30). The wellscreen comprises a perforated base pipe (31) having a wire wrap (32) disposed therearound, so that an annular space (35) is formed between the wire wrap and the base pipe. Apertures (34, 49) are provided at first and second longitudinal positions in the wellscreen. The apertures provide fluid communication between the exterior of the wire wrap and the annular space, so that slurry (41) can flow through the annular space to bypass sand bridges.

La présente invention concerne d'une façon générale un appareil et un procédé permettant de fournir un gravillonnage des crépines plus uniforme dans un puits de forage. Cet appareil (100) redirige les matières particulaires contenant des boues, et comprend un tamis de puits (30). Ce tamis de puits comprend un tuyau de base perforé (31) qui possède une connexion enroulée placée autour de ce tuyau, de sorte qu'un espace annulaire se forme entre cette connexion enroulée et le tuyau de base. Des ouvertures (34, 49) sont ouvertes au niveau d'une première et d'une seconde position longitudinale dans ce tamis de puits. Ces ouvertures permettent une communication fluidique entre l'extérieur de la connexion enroulée et l'espace annulaire, de sorte que les boues (41) puissent s'écouler à travers cet espace annulaire de façon à contourner des ponts de sable.

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