FIELD: mining.
SUBSTANCE: invention relates to mining industry, particularly, to drill cutting bits used in seismic survey at drilling of blast holes in unstable earth and flooded rocks of I-IV category by drillability. Drilling cutting bit includes housing with through axial hole, side cutters are reinforced with hard alloy and arranged on bit housing. Drilling cutting bit also comprises disposable plug, upper part of which is made with sealing collars; body of disposable plug is made hollow, and in end of bit case there is groove.
EFFECT: technical result consists in drilling in drift-sands with guaranteed immersion of charge of explosive substances in well.
1 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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| METHOD OF WELL-DRILLING WITH SIMULTANEOUS CASE AND FACILITY FOR ITS IMPLEMENTATION | 2007 |
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