Method and apparatus for directional drilling

Details Method and apparatus for directional drilling Method and apparatus for directional drilling

E - Fixed Constructions

21

B

E21B 7/28 (2006.01)

Patent

CA 2548962

The present invention is directed at a pullhead/reamer for use in digging a hole in the ground; comprising a first end (22) shaped to receive a mandrel struts, connecting the first end to the second end, the struts defining a set of open flutes (48) therewithin; and a set of slurry jets (50); wherein when the pullhead/reamer is in use, the set of slurry jets release a pressurized liquid to mix with the ground producing a slurry which enters the pullhead/reamer via the open flutes.

L'invention concerne un ensemble tête de traction/aléseur à utiliser pour le forage d'un trou dans le sol, qui comprend une première extrémité (22) conçue pour recevoir des entretoises de mandrin, reliant la première extrémité à une deuxième extrémité, un ensemble de goujures ouvertes (48) étant défini entre les entretoises ; et un ensemble de jets (50) de boue. En cours d'utilisation, les jets de boue dudit ensemble tête de traction/aléseur libèrent un liquide sous pression à mélanger avec le sol qui produit une boue pénétrant dans l'ensemble tête de traction/aléseur par l'intermédiaire des goujures ouvertes.

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