FIELD: mining.
SUBSTANCE: invention relates to drilling. Drive of drilling bit for tools for grinding of fragile materials or penetration in fragile materials comprises drill bit on basis of heat engine operated using a gaseous working medium. Heat engine operates on real Stirling cycle, and drilling bit includes an pressure reservoir (3). Heat engine can be made in form of free piston of Stirling engine with axial location of working piston (30g) and piston-displacer (30b) inside cylindrical pressure reservoir (3) or in form of Stirling engine, which is thermosonic Stirling engine with preferably cylindrical pressure reservoir (3).
EFFECT: efficiency of drive at very high hydrostatic pressure.
13 cl, 20 dwg
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| DOWNHOLE MOTOR STABILIZER | 0 |
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