FIELD: drilling of permafrost grounds with hard inclusions. SUBSTANCE: drilling device has core receiver 2 and core catcher. Rock cutting members 9 are located on end of rock cutting tool 1. Movable members 5 are installed on end of tool body 1 between members 9 for turning under action of axial impact load in direction of rotation of drilling device. Turning of members 5 in opposite direction is limited by stops made on end of body 1. EFFECT: higher efficiency. 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CIRCULAR AIR HAMMER | 1994 |
|
RU2067148C1 |
| ROCK CUTTING TOOL FOR VIBRATORY ROTARY DRILLING | 1992 |
|
RU2053346C1 |
| CROWN BIT FOR ENHANCING BOREHOLES | 1996 |
|
RU2098593C1 |
| DRILL BIT | 1995 |
|
RU2086748C1 |
| SUBMERSIBLE PNEUMATIC PERCUSSIVE MECHANISM | 0 |
|
SU872747A1 |
| PROJECTILE FOR WELL BORING | 2007 |
|
RU2338862C1 |
| THERMAL-MECHANICAL ROCK-DESTROYING TOOL | 2003 |
|
RU2247216C2 |
| DRILLING BIT | 1998 |
|
RU2135735C1 |
| DRILLING BIT | 2017 |
|
RU2649210C1 |
| THERMAL-MECHANICAL DRILLING METHOD AND DEVICE | 2003 |
|
RU2263758C2 |
