Patent ID: 11891860
Assignee: METAL TOOL INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A casing protection bit to be mounted on a casing tube, the casing protection bit comprising:
a base portion including a front end that protrudes in an axial direction of the casing tube; and
first and second leg portions extending continuously with the base portion and facing each other at a predetermined distance, wherein
the base portion includes a flat surface part that is continuous to a plane of the first leg portion, a first inclined part that is inclined from the flat surface part toward the front end side in an axial direction of the casing tube, side surface parts each of which is continuous from the flat surface part and the first inclined part, and a second inclined part that is inclined from the first inclined part toward the first and the second leg portions side in the axial direction of the casing tube,
cemented carbide tips are disposed on the flat surface part, the first inclined part, the side surface parts, and the second inclined part, and
long-shaped cemented carbide tips are disposed on laterally opposed edges of the first leg portion, the edges extending in the axial direction of the casing tube.