ANALYSIS OF «STICK-SLIP» TYPE TORSIONAL VIBRATIONS OF DRILL STRING AND ITS INFLUENCE FOR DRILLING PROCESS
Balitskiy Vladimir P., Cand. Tech. Sci., senior lecture, the chair of oil and gas drilling department of the Russian Gubkin State University of Oil and Gas, e-mail: Balitsky@gubkin.ru, Balitsky@gubkin.ru
Zaykov Dmitry L., 5-year specialist degree «Drilling of Oil and Gas wells» Master student, Russian Gubkin State University of Oil and Gas, JSC «SRPC GOT» Drilling Supervisor, e-mail: ZaykovDL@gmail.com ZaykovDL@gmail.com

УДК 622.24

Key words: torsional vibrations, «Stick-Slip» phenomenon, PDC bits, vibrations, bit wear, reverse bit rotation.

Oilwell drilling is often affected by self-excited «stick-slip» vibrations, which can highly accelerate the wear of the PDC bits. The aim of the paper is to analyze the methodologies which allow to prevent the occurrence of these vibrations. This paper presents the new method which provides identical speed rotation of a bit.

ANALYSIS OF «STICK-SLIP» TYPE TORSIONAL VIBRATIONS OF DRILL STRING AND ITS INFLUENCE FOR DRILLING PROCESS
Balitskiy Vladimir P., Cand. Tech. Sci., senior lecture, the chair of oil and gas drilling department of the Russian Gubkin State University of Oil and Gas, e-mail: Balitsky@gubkin.ru
Zaykov Dmitry L., 5-year specialist degree «Drilling of Oil and Gas wells» Master student, Russian Gubkin State University of Oil and Gas, JSC «SRPC GOT» Drilling Supervisor, e-mail: ZaykovDL@gmail.com

Key words: torsional vibrations, «Stick-Slip» phenomenon, PDC bits, vibrations, bit wear, reverse bit rotation.

Oilwell drilling is often affected by self-excited «stick-slip» vibrations, which can highly accelerate the wear of the PDC bits. The aim of the paper is to analyze the methodologies which allow to prevent the occurrence of these vibrations. This paper presents the new method which provides identical speed rotation of a bit.