FLUSHING UNIT OF DRILLING BIT Russian patent published in 2009 - IPC E21B10/18 

FIELD: mining.

SUBSTANCE: invention refers to flushing units of rock destroying tool of hydro-monitored type. The flushing unit consists of a case with a channel and a seat made with a circular boring and of a head of conic exterior surface with sealing element; the said head is installed in the seat; also the flushing unit consists of a catch device with interior conic surface located in the circular boring of the seat. The unit is equipped with a bushing of elastic material which is installed between the conic surfaces of the head and the catch device and is designed to interact with the surfaces and the catch device. Also the bushing has a circular slot at the lower end and is equipped with a split-type arc-shape in cross section ring of spring material; the split-type ring is installed in the circular slot of the bushing and interacts with side walls of the circular slot. The split-type ring is rigidly connected with a bushing.

EFFECT: simplifying assembling and disassembling washing unit and increasing reliability and efficiency of drilling bit operation as a whole.

3 dwg