US 7,490,680 B2
	Process and system for drilling and lining a bore hole
Morris Medd, North Bay (Canada); Mike Kelly, Callander (Canada); and Dan Kelly, North Bay (Canada)
Assigned to J. S. Redpath Ltd., North Bay (Canada)
Filed on Apr. 10, 2007, as Appl. No. 11/733,424.
Application 11/733424 is a division of application No. 10/766199, filed on Jan. 27, 2004, granted, now 7,219,750.
Claims priority of provisional application 60/442505, filed on Jan. 27, 2003.
Prior Publication US 2007/0175668 A1, Aug. 02, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 7/28 (2006.01); E21B 11/00 (2006.01)

U.S. Cl. 175—53  [175/57; 175/171]

13 Claims

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.