FIELD: bore-hole drilling machinery and equipment. SUBSTANCE: this relates to roller-type drilling bits with hermetically sealed support. Support of drilling bit has journal for mounting roller bit on it with tapered bore, and it also has sealing made in the form of one rotating and one stationary sealing rings which are contacting with each other over end surface. Rotating ring is trimmed over outer diameter with flexible member and is so installed that flexible member rests against tapered bore of roller cutter bit. Support is provided with additional flat circular gasket. Stationary ring is flat and has circular sealing protrusions on one of its flat surfaces. Flexible circular gasket is installed after stationary ring and rests against circular shoulder of journal and circular sealing protrusions of stationary ring. Outer diameter of stationary ring is larger than outer diameter of rotating ring by 1.01-1.15 times. EFFECT: higher efficiency. 1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TIPS OF ROLLING CUTTER OF DRILL BIT | 1994 |
|
RU2057889C1 |
| NON-RETURN VALVE OF DRILLING BIT WITH AIR BLOWING | 1996 |
|
RU2108443C1 |
| CONE DRILL BIT | 1994 |
|
RU2057890C1 |
| ROLLER-CUTTER BIT SUPPORT | 0 |
|
SU1700188A1 |
| ROLLER BIT | 2000 |
|
RU2173758C1 |
| DRILL BIT SUPPORT FOR AIR DRILLING | 0 |
|
SU1645436A1 |
| ROTARY CUTTING BIT OF THREE-CONE DRILL BIT | 1992 |
|
RU2006566C1 |
| ROLLING CUTTER BIT | 0 |
|
SU1640337A1 |
| EXTENDED BIT JET NOZZLE | 1992 |
|
RU2012763C1 |
| ROLLER-BIT DRILL | 0 |
|
SU1413230A1 |
