For citations:

Grechin E.G., Kuznetsov V.G., Kulyabin G.A., Kurbanov Ya.M. THE LAYOUT OF DRILLING STRING FOR IMPLEMENTATION OF THE PROFILE BUILD-AND-HOLE WELLBORE. Oil and Gas Studies. 2018;(2):34-39. (In Russ.) https://doi.org/10.31660/0445-0108-2018-2-34-39