FIELD: machine building.
SUBSTANCE: set of inventions relates to drill bit for percussion drilling, drilling system and well-boring in subsurface bed. The drill bit has a central lengthwise axis for it to move along the said axis and to rotate around it in operation, the blades and continuous flow channels. The said channels are formed between two adjacent blades. The drill bit chipping and cutting elements are arranged in a row on the blade front edge or nearby it and behind the continuous flow channel or nearby it relative to the direction of rotation, the said channel being communicated with the said front edge. Axial cutting elements are arranged at the rear with respect to the chipping element row and continuous-flow channel communicating with the said row. The drilling system incorporates a string with the drill bit designed for percussion drilling. The well-boring method consists in using the aforesaid system.
EFFECT: longer life and higher efficiency of chipping and cutting elements.
14 cl, 7 dwg
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|---|---|---|---|
| DRILL BIT, SYSTEM AND METHOD OF WELL-BORING IN SUBSURFACE BED | 2004 |
|
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