公开(公告)号：WO2021165323A1

公开(公告)日：2021-08-26

申请号：PCT/EP2021/053893

申请日：2021-02-17

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： LOIKKANEN, Joona ,  LINDBLOM, Anders

IPC: E21B10/25

Abstract: A roller cutter for a drill head for raise boring said roller cutter having a shaft with a longitudinal centre line; a hub rotatably mounted on the shaft; a seal retainer located between the axial ends of the hub and the shaft at least arranged at one end of the roller cutter; the seal retainer supporting a primary cutter seal providing sealing between the shaft and the hub in both axial and radial directions, a secondary cutter seal located between the seal retainer and the hub, and that the secondary cutter seal provides sealing in the axial direction.

公开(公告)号：WO2021239664A1

公开(公告)日：2021-12-02

申请号：PCT/EP2021/063760

申请日：2021-05-24

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： LINDBLOM, Anders ,  LOIKKANEN, Joona

IPC: E21B7/28 ,  E21B10/28 ,  E21B10/50 ,  E21B17/10 ,  E21D3/00

Abstract: A wear support assembly comprising a wear pad arranged on top of a support plate wherein the support plate has a lower surface for connecting to a raise boring tool and both the wear pad and the support plate have at least one hole for receiving a bolt to connect the wear pad to the support plate. Also a raise boring tool for raise boring operations comprising; a reamer head having a body; a plurality of roller cutters connected to the body using a holder; a nose or drive stem connected the body; and at least one wear support assembly wherein each support plate is connected directly to raise boring too and each wear pad is radially or perpendicularly bolted to each support plate.