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V. N. Vinogradov, G. M. Sorokin, A. N. Pashkov, and V. M. Rubarkh, Life of Drill Bits [in Russian], Nedra, Moscow (1977).
V. N. Vinogradov, G. M. Sorokin, and I. B. Kurakin, “Drill bit,” USSR Inventor's Certificate No. 714002, Byull. Izobret., No. 5, (1980).
Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 2, pp. 24–25, February, 1984.
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Sorokin, G.M., Kurakin, I.B. Development of a new drilling tool. Chem Petrol Eng 20, 70–72 (1984). https://doi.org/10.1007/BF01155061
- Drilling Tool