CRITERION FOR SELECTION OF PDC BIT WITH ANTIVIBRATION INSERTS
Chulkova, Viktoria V. – candidate for master’s degree, MGRI-RGGRU of Sergo Ordzhonikidze, ChulkovaVV@gmail.com ChulkovaVV@gmail.com
Gandzhumyan, Ruben A. – Cand.Tech.Sci., professor, MGRI-RGGRU of Sergo Ordzhonikidze, Drill@msgpa.ru Drill@msgpa.ru

УДК 622.24
Key words: PDC bit, peripheral cutting structure, antivibration inserts, vibration, varying hardness interbedded formations.
The paper provides a review of results of drilling bit operation in interbedded formations of varying hardness in the Ural-Volga region. Following a regressive analysis, the author established a link between cutting structure wear and increase in net time on bottom. A criterion for selection of a drill bit with antivibration inserts has been proposed. Examples are provided of how average penetration rates result in bit wear. Also, there is an analysis of recorded PDC bit torque.

CRITERION FOR SELECTION OF PDC BIT WITH ANTIVIBRATION INSERTS
Chulkova, Viktoria V. – candidate for master’s degree, MGRI-RGGRU of Sergo Ordzhonikidze, ChulkovaVV@gmail.com
Gandzhumyan, Ruben A. – Cand.Tech.Sci., professor, MGRI-RGGRU of Sergo Ordzhonikidze, Drill@msgpa.ru

Key words: PDC bit, peripheral cutting structure, antivibration inserts, vibration, varying hardness interbedded formations.
The paper provides a review of results of drilling bit operation in interbedded formations of varying hardness in the Ural-Volga region. Following a regressive analysis, the author established a link between cutting structure wear and increase in net time on bottom. A criterion for selection of a drill bit with antivibration inserts has been proposed. Examples are provided of how average penetration rates result in bit wear. Also, there is an analysis of recorded PDC bit torque.