Abstract: The present invention provides a hard-rock core barrel roller cutter assembly, which comprises a roller cutter and a saddle. The roller cutter comprises a base portion for operating, and a connecting portion integrated with the base portion and detachably connected to the saddle. The connecting portion has a butted oblique plane, and a width of the connecting portion is gradually increased from one end adjacent to the base portion to another end far away from the base portion. A fixing block is detachably connected to the saddle, and the fixing block has a pressure slope which matches with the butted oblique plane. A width of the fixing block is gradually decreased from one end adjacent to the base portion to another end far away from the base portion, and the saddle is muff-jointed out of the connecting portion and the fixing block.

Abstract: The present invention provides a modular drilling reamer which includes a central tube, a drill bit base and a centralizer which are detachably connected to two opposite ends of the central tube respectively. The drill bit base has a first connecting hole for detachably connecting with the central tube and assembling holes for mounting single drill bits, scrapers and/or centralizing rollers. The centralizer has a second connecting hole for detachably connecting with the central tube. The modular drilling reamer provided by the present invention can be modular with various replaceable drill bits by connecting the central tube with the centralizer and the drill bit base. It is convenient to assemble and is applicable to various reaming sizes and operations by replacing the drill bit bases which are different in size or the drill bit base equipped with different drill bits.

Abstract: The present invention provides a hard-rock core barrel roller cutter assembly, which comprises a roller cutter and a saddle. The roller cutter comprises a base portion for operating, and a connecting portion integrated with the base portion and detachably connected to the saddle. The connecting portion has a butted oblique plane, and a width of the connecting portion is gradually increased from one end adjacent to the base portion to another end far away from the base portion. A fixing block is detachably connected to the saddle, and the fixing block has a pressure slope which matches with the butted oblique plane. A width of the fixing block is gradually decreased from one end adjacent to the base portion to another end far away from the base portion, and the saddle is muff-jointed out of the connecting portion and the fixing block.