FIELD: soil or rock drilling.
SUBSTANCE: invention relates to flushing assemblies of jetting bits. Flushing assembly of drilling bit includes housing with channel and seat, which is made with annular bore, and nozzle installed in seat with sealing element, which is fixed there by means of locking ring seat with annular length section arranged in annular groove and with L-shaped longitudinal section contacting with external surface of nozzle. Flushing assembly is equipped with a sleeve made of elastic material and located between the upper end of the nozzle and the lower end face of the sealing ring. Coefficient of elasticity of sealing element is less than coefficient of elasticity of sleeve.
EFFECT: improving operating efficiency of the flushing assembly due to improvement of its hydrodynamic parameters.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DRILL BIT FLUSHING ASSEMBLY | 2018 |
|
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| ONE-CUTTER ROCK DRILLING BIT | 2018 |
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| SINGLE-ROLLER BIT | 2018 |
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|
RU2509861C1 |
