FLUSHING ASSEMBLY OF DRILLING BIT Russian patent published in 2014 - IPC E21B10/60 

FIELD: mining.

SUBSTANCE: flushing assembly of a drilling bit includes a housing with a channel and a seat and a head piece with a sealing element, which is installed in the seat and fixed there by means of a retaining split-type ring arranged in the annular bore of the seat. The flushing assembly is provided with fasteners for the retaining split-type ring in the form of composite stepped rods, which step of larger diameter is located from the side of output channel of the head piece designed with concentric arranged through axial channels reciprocal to stepped rods. In operating position lower step of each rod is installed with possibility of interaction with inner surface of retaining split-type ring.

EFFECT: improving operating reliability and efficiency of the flushing assembly and the whole bit.

1 dwg