FIELD: mining.
SUBSTANCE: drill tool comprises a housing with channels for cleaning agent reinforced with hollow hard-alloy inserts with working heads, the cavities of which are interconnected with the housing channels. The internal surface of the working head has wedge-shaped ledges located at sharp angle to the diametrical plane of the working head. The axial channel of cavity of each insert has a helical shape. The tilt angle of wedge-shaped ledges in the working head cavity is aligned with the direction of spiral channels. Apexes of wedge-shaped ledges in a cross section have a rounded shape.
EFFECT: increase of overall performance of the drill tool.
2 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| HARD-ALLOY INSERT | 2014 |
|
RU2543769C1 |
| DRILL TOOL | 2014 |
|
RU2543768C1 |
| HARD-ALLOY INSERT | 2013 |
|
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| DRILLING BIT | 2015 |
|
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| DRILLING BIT | 2011 |
|
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| DRILLING BIT | 2004 |
|
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| DOUBLE-EDGED DRILLING BIT | 2004 |
|
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| ROTARY-PERCUSSION BORE BIT | 2004 |
|
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| DRILLING BIT ROLLER CUTTER | 2010 |
|
RU2445434C1 |
| DRILLING BIT ROLLING CUTTER | 2011 |
|
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