Process and system for drilling and lining a bore hole
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 bead 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 arms 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 lined 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 passage 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 beads.
1. A reamer assembly for use with a raise bore drilling and lining apparatus, said reamer assembly including a reamer head, a spreader assembly secured to said reamer head for movement therewith and for distributing a liner material on the wall of said bore hole during operation thereof, said spreader assembly comprising a plate rotatable relative to said reamer head; and a material supply connected to said spreader assembly to deliver material thereto.
2. A reamer assembly according to claim 1 including a motor for rotating said plate.
3. A reamer assembly according to claim 1 wherein said motor is fluid driven.
4. A reamer assembly according to claim 1 including a material reservoir and supply pipes extending from said reservoir to deliver material to said plate.
5. A reamer assembly according to claim 4 including a pair of reservoirs, each having respective supply pipes.
6. A reamer assembly according to claim 1 wherein said reamer assembly is connected to a drill string, said drill string including a plurality of drill rods connected in seriatim, wherein each of said plurality of drill rods includes an outer casing and a liner located within said casing, said liner having a plurality of concentric walls defining a series of fluid passageways between successive ones of said walls to convey fluid axially within said rod between opposite ends.
7. A reamer assembly for use with a raise bore drilling and lining apparatus, said reamer assembly including a reamer head; a spreader assembly secured to said reamer head for movement therewith and for distributing a liner material on the wall of said bore hole during operation thereof, said spreader assembly independently rotatable of said reamer head; and a material supply connected to said spreader assembly to deliver material thereto.
8. A reamer assembly according to claim 7 wherein said spreader assembly includes a plate rotatable relative to said reamer head to dispense said material.
9. A reamer assembly according to claim 7 including a motor for rotating said plate.
10. A reamer assembly according to claim 7 wherein said motor is fluid driven.
11. A reamer assembly according to claim 7 including a material reservoir and supply pipes extending from said reservoir to deliver material to said plate.
12. A reamer assembly according to claim 11 including a pair of reservoirs, each having respective supply pipes.
13. A reamer assembly according to claim 7 wherein said reamer assembly is connected to a drill string, said drill string including a plurality of drill rods connected in seriatim, wherein each of said plurality of drill rods includes an outer casing and a liner located within said casing, said liner having a plurality of concentric walls defining a series of fluid passageways between successive ones of said walls to convey fluid axially within said rod between opposite ends.