E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 29/00 (2006.01) E21B 7/00 (2006.01) E21B 10/40 (2006.01) F16L 55/18 (2006.01)
Patent
CA 2214175
The invention relates to drilling apparatus for renovating underground pipes, provided for drilling an existing pipe. The apparatus is equipped with a percussive drill bit assembly (2) and with a guiding element (3) attached to a construction, with respect to which the percussive drill bit assembly is movable. In front of the guiding element (3) there is joined a rotatable and tractive drill string (5) for supplying rotation and advancing movement to the drilling apparatus through the guiding element (3) from the advancing direction of the drilling apparatus. Around said drill string (5) is disposed a conveyor screw (6) rotatable by the rotation of the drill string (5) to convey drill cuttings forward from the drilling location along the existing pipe.
L'invention a trait à un outil servant à remettre à neuf les tuyaux souterrains et elle est utilisée pour le forage dans un tuyau en place. L'outil est muni d'un taillant de marteau perforateur pneumatique (2) et d'un élément de guidage (3) fixé à une structure, par rapport à laquelle le taillant du marteau perforateur pneumatique est mobile. Devant l'élément de guidage (3) se trouve un train de tiges d'entraînement rotatif (5) pour fournir la force de rotation et d'avance à l'outil par l'intermédiaire de l'élément de guidage (3) à partir du sens d'avancement de l'outil à percer. Autour du train de tiges (5) se trouve un transporteur à vis (6) entrainé par la rotation du train de tiges (3), qui sert à transporter les déblais vers l'avant à l'écart du lieu de forage le long du tuyau existant.
Borden Ladner Gervais Llp
Rd Trenchless Ltd. Oy
LandOfFree
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