Key words:well service life, zenith angle, period of oil production, directional wellbore, corrosion, mechanical wear and tear, the statistical dependencies, free of water, highly watercut, H S sour oil production.
The effect of borehole deviation on wells operating time at the development of the layers of terrigenous strata of the Lower Carboniferous is investigated. Well operating time dependence on the maximum inclination angle is given. Three times of well operation are isolated and characterized.
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