Process and system for drilling and lining a bore hole

Details Process and system for drilling and lining a bore hole Process and system for drilling and lining a bore hole

E - Fixed Constructions

21

B

E21B 7/28 (2006.01) E21B 17/18 (2006.01) E21B 33/138 (2006.01)

Patent

CA 2514437

An apparatus is provided for the drilling of a borehole and its simultaneous lining with cement or the like by the same apparatus. The apparatus comprises a combination spray head and reamer head, a means to drive the reamer head through a borehole and a means for delivering cement to the spray head. Cement is fed to a rotatable spray disc or arm of the spray head, which is arranged to distribute the cement substantially evenly over the internal surface of the borehole created by the reamer head. The apparatus uses lines drill rods, as well as a lined reamer core with a double walled plastic tube. An air transfer assembly is used to connect an internal air source to an air passagae contained in the plastic tube, such that the external air source remains stationary during rotation of the lined drill rods and attached reamer and spray heads.

L'invention concerne un dispositif permettant de forer un trou de forage et de le revêtir simultanément de ciment ou analogue. Ce dispositif comprend une tête de pulvérisation et une tête d'alésage combinées, des moyens d'entraînement de la tête d'alésage à travers un forage et des moyens d'apport de ciment vers la tête de pulvérisation. Le ciment est amené vers un disque ou un bras de pulvérisation rotatif de la tête de pulvérisation, qui est conçu pour répartir régulièrement le ciment sur la surface interne du forage produit par la tête d'alésage. Le dispositif utilise des tiges de forage chemisées ainsi qu'un noyau d'alésage chemisé comportant un tuyau plastique à double paroi. Un ensemble transfert d'air sert à relier une source d'air interne à un passage d'air contenu dans le tuyau plastique, de sorte que ladite source d'air externe reste fixe pendant la rotation des tiges de forage chemisées et des têtes d'alésage et de pulvérisation associées.

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