FIELD: drilling of soil or rock.
SUBSTANCE: invention relates to drilling equipment, namely to drilling bits of rolling type. Drill bit comprises a body with inclined bearings on which through retaining bearing are mounted cutters with annular bore and packing units, each of which is formed by an elastic clamping ring and a package of rigid sealing rings located with a radial clearance with respect to the walls of circular cutter bore. Each packing unit is provided with additional annular bushing made of resilient material and located in annular clearance between the outer surface of package of rigid sealing rings and the inner surface of the roller cutter bore.
EFFECT: technical result consists in improvement of drilling bit operation efficiency.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DRILL BIT | 2017 |
|
RU2658965C1 |
| DRILL BIT | 2017 |
|
RU2658948C1 |
| ROLLING CUTTER DRILLING BIT | 2005 |
|
RU2291270C1 |
| SUPPORT OF ROLLING CUTTER DRILLING BIT | 2011 |
|
RU2452842C1 |
| ROLLER CUTTER DRILLING TOOL BEARING ASSEMBLY (VERSIONS) | 2008 |
|
RU2377382C1 |
| CONE BIT SUPPORT | 2011 |
|
RU2476662C1 |
| SUPPORT FOR CUTTER DRILL BIT | 2007 |
|
RU2351738C1 |
| DRILL BIT BEARING STRUCTURE | 2007 |
|
RU2347058C1 |
| ROLLING CUTTER DRILLING BIT SUPPORT | 2005 |
|
RU2291272C1 |
| SUPPORT OF CONE-ROCK BIT AND MOUNTING METHODS (OPTIONS) | 2006 |
|
RU2327849C1 |
