Analytical and experimental study of the deformation of roller cone bit parts

V. A. Pyalchenkov; G. A. Kulyabin; V. V. Dolgushin; D. V. Pyalchenkov

V. A. Pyalchenkov Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia
G. A. Kulyabin Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia
V. V. Dolgushin Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia
D. V. Pyalchenkov Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

Keywords: Drilling, bit, roller cone, support, roller cone cutting structure, load, deformation, rigidity.

Abstract

Distribution of load between the cutting elements of the roller cutter drill bit depends on several factors, among them on the stiffness of the drilling-bit assembly. To deduce the dependencies of the stiffness of the drilling-bit assembly on the drill bit design and the point of application of the external load, the scheme of static interaction of the rolling cutter drill bit with the non-deformable bottom hole is considered. The calculation results allow to conclude, that the vertical stiffness of the drilling bit assembly has a maximum value at the contact with the bottom hole of the middle teeth rows of the roller cutters. For verification of the results of the analytical calculations the experimental measurements of the vertical movements of the rolling cutters of the roller cutter drill bit at the contact of those with bottom hole with the teeth of the different teeth rows have been made. The proposed methodology can be used to optimize the design of the roller cutter drill bits at the blueprint stage.

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Author Biographies

V. A. Pyalchenkov, Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

G. A. Kulyabin, Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

V. V. Dolgushin, Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

D. V. Pyalchenkov, Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

Industrial University of Tyumen, 38 Volodarskogo St., Tyumen, Russia

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