BORE BIT Russian patent published in 2011 - IPC E21B10/36

Abstract RU 2435926 C1

FIELD: mining.

SUBSTANCE: bore bit consists of case with system of blow-off orifices and channels. A head piece of the case is reinforced with hard alloy insertions. Also, outlet of the blow-off orifices into a working zone of the bore bit is made in form of a nozzle; and faces are made on edges of the blow-off channels coming out into the working zone of the bore bit.

EFFECT: raised efficiency of bore bit, durability and speed of drilling due to more efficient blow-off of working face and cuttings lifting from working zone of well bottomhole.

2 dwg

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RU 2 435 926 C1

Authors

Kantsurov Aleksandr Nikolaevich

Dates

2011-12-10—Published

2010-05-31—Filed