FIELD: mining. SUBSTANCE: reamer includes body and legs secured to body in tiers. Legs carry roller bits cantilevered to them between body and legs. Minimum distance between roller bit and body equals or exceeds the height of roller bit tooth cutting structure. EFFECT: higher efficiency. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| REAMER FOR DRILLING WELLS OF LARGE DIAMETERS | 1990 |
|
RU2012813C1 |
| ROLLER TOOL OF STEPPED ACTION | 1992 |
|
RU2019700C1 |
| BENCHING BIT | 0 |
|
SU1774983A3 |
| DISK ROLLER-CUTTER FOR DRILLING HOLE SHOULDERS | 0 |
|
SU1756527A1 |
| REAMER FOR DRILLING SHAFTS AND HOLES | 0 |
|
SU1809077A1 |
| ARRANGEMENT FOR SINKING VERTICAL MINE WORKINGS | 0 |
|
SU752012A1 |
| ROLLER REAMER | 2014 |
|
RU2600225C1 |
| ROCK-BREAKING MEMBER FOR DRILLING MINE SHAFTS AND LARGE-DIAMETER WELLS | 0 |
|
SU1167336A1 |
| ROLLER CUTTER DRILLING TOOL | 2014 |
|
RU2544195C1 |
| DRILLING DEVICE | 0 |
|
SU1795104A1 |
