FIELD: mining. SUBSTANCE: roller tool of stepped action includes roller bit and leg with connecting surface. The latter is made in form of cone opening or cone projection whose cone vertex is directed towards roller bit or to opposite side. Leg body has hole whose axis intersects the axis of opening cone surface or projection and perpendicular to plane running through roller bit rotation axis and axis of opening or projection cone surface. EFFECT: higher efficiency in drilling shafts or wells of large diameters. 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| REAMER FOR DRILLING WELLS OF LARGE DIAMETER | 1992 |
|
RU2019701C1 |
| BENCHING BIT | 0 |
|
SU1774983A3 |
| REAMER FOR DRILLING WELLS OF LARGE DIAMETERS | 1990 |
|
RU2012813C1 |
| DISK ROLLER-CUTTER FOR DRILLING HOLE SHOULDERS | 0 |
|
SU1756527A1 |
| REAMER FOR DRILLING SHAFTS AND HOLES | 0 |
|
SU1809077A1 |
| ROLLER CUTTER DRILLING TOOL | 2014 |
|
RU2544195C1 |
| METHOD OF PRODUCING ROLLER DRILL BIT | 2012 |
|
RU2499120C2 |
| METHOD OF ASSEMBLING AND CUTTING OF DRILLING CONE ROCK BIT | 2006 |
|
RU2324804C2 |
| DRILLING CONE ROCK BIT | 2009 |
|
RU2390616C1 |
| ROLLER BIT | 2000 |
|
RU2173758C1 |
