FIELD: oil and gas industry.
SUBSTANCE: bottomhole actuator (30) includes a tubular casing (34) that includes a profile (42) of step-by-step displacement on its inner surface and a bushing (46) of step-by-step movement mounted in the casing (34). A bushing (46) of step-by-step movement comprises an engaging device including first and second axially spaced engagement elements (52, 54) with the profile (42) of the casing (34) step-by-step movement for step-by-step engagement by a control object (48) passing through a central channel (50) of step-by-step for moving the step-by-step bushing (46) by one discrete movement step through the casing (34) to actuation location.
EFFECT: increased efficiency of the downhole device and method of its use.
28 cl, 51 dwg
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