RussianPatents.com

Crown bit. RU patent 2287658.

FIELD: rock-destroying tools, namely, crown bits with diamond armaments for drilling wells and taking core samples.

SUBSTANCE: crown includes body and diamond-containing matrix, divided by washing grooves on sectors, reinforced by external and internal reaming and volumetric diamonds. Special feature of crown is the positioning schematic of reaming diamonds, which in vertical plane in each sector are mounted along inclined line, while beginning of line, positioned in frontal part of sector is shifted along height relatively to another end of line towards connecting thread.

EFFECT: significantly increased efficiency of operation of crown as a whole.

2 cl, 3 dwg

IPC classes for russian patent Crown bit. RU patent 2287658. (RU 2287658):

E21B10/48 - the bit being of core type

Another patents in same IPC classes:

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