FIELD: drilling equipment. SUBSTANCE: bearing of roller bit has leg with cone pin on which cone is mounted with aid of bearings, and ring protecting from cuttings in form of flexible collar with flexible metal frame. Flexible collar has recesses on contact surface or hole on conical surface of collar. EFFECT: higher efficiency. 2 cl, 3 dwg
Title | Year | Author | Number |
---|---|---|---|
SEALING UNIT OF DRILL BIT BEARING | 1988 |
|
RU1686869C |
ROLLER BIT BEARING | 1990 |
|
RU2019669C1 |
ROLLER BIT BEARING | 1991 |
|
RU2019671C1 |
SEALED BEARING OF ROLLER BIT | 1990 |
|
RU2019670C1 |
DRILL BIT BEARING ASSEMBLY | 1992 |
|
RU2067150C1 |
ROLLER BIT BEARING | 1990 |
|
RU2030541C1 |
ROLLER DRILL BIT | 0 |
|
SU1406331A1 |
CONE DRILL BIT | 0 |
|
SU861538A1 |
ROLLER DRILL BIT | 1991 |
|
RU2029050C1 |
ROTARY BIT | 0 |
|
SU1298332A1 |
Authors
Dates
1994-09-15—Published
1991-01-22—Filed