FIELD: bore drilling equipment, particularly drilling bits with hard-alloy cutting structures.
SUBSTANCE: drilling bit comprises body with legs having pins to which cutters with rock-cutting teeth are rotationally connected. Cylindrical surface of tooth end is inserted in cylindrical hole below outer bit surface for depth δ=(0.05-0.16)h, where h is rock-cutting tooth head height projecting over cylindrical end thereof.
EFFECT: increased reliability of hard-alloy teeth securing in drilling bit body and increased durability of the teeth.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PRODUCTION METHOD FOR INSERT CUTTER STRUCTURE OF DRILLING BITS | 2004 |
|
RU2280145C1 |
| GEAR OF THE DRILLING BIT | 2016 |
|
RU2631738C2 |
| RELLER BIT PICK | 2015 |
|
RU2633847C2 |
| CONE BIT | 2019 |
|
RU2726724C1 |
| DEVICE FOR HARD-ALLOY DRILLING BIT CUTTER TESTING | 2006 |
|
RU2321839C1 |
| BORE CONE BIT | 2007 |
|
RU2355864C2 |
| METHOD FOR FASTENING AND REMOVING TEETH FROM WORN-OUT ROCK-BREAKING TOOL | 1991 |
|
RU2023851C1 |
| ROLLER CUTTER DRILLING BIT | 0 |
|
SU1701887A1 |
| ROLLER BIT WITH HARD-ALLOY INSERTS | 2012 |
|
RU2499121C1 |
| BORE CONE BIT | 2007 |
|
RU2355863C2 |
