RADIAL VIBRATION DEVICE Russian patent published in 2015 - IPC E21B1/22 E21B7/24 E21B43/10 E21B23/00 E21B31/00 E21B28/00 

FIELD: machine building.

SUBSTANCE: vibration device contains elongated casing, external elongated assembly, installed coaxially in the casing and made with prevention of rotation and with possibility of reciprocating longitudinal movement relatively to the casing string, internal elongated assembly installed coaxially in the external elongated assembly and made with possibility of fluid passage in longitudinal direction of part of vibration device, and having group of magnets located coaxially and longitudinally in said assembly, and located in the group of magnets of external elongated assembly at distance from it and coaxially with it. Each magnet of internal elongated assembly has single pole in group with mixed or unmixed poles looking outside. The internal or external elongated assemblies are made with possibility of rotation by drive relatively to the another elongated assembly, ensuring reciprocating relative movement between internal or external elongated assemblies as result of multiple magnetic interactions in the elongated ring space between groups of the magnets.

EFFECT: increased hydraulic power in well tool.

16 cl, 15 dwg