FIELD: mining.
SUBSTANCE: group of inventions relates to generation of oscillations in a borehole by means of agitators to provide axial movement of the drill string. Agitator comprises a first axially moveable element. Said first axially moveable element is coupled to a second laterally moveable element arranged inside a housing via mechanical coupling. Mechanical coupling may be a pin and groove arrangement. Groove forms a modified or unmodified sinus shaped guiding loop that allows the first element to oscillate within the housing. Second element is driven by a turbine unit which may have flow regulating means. This provides an agitator tool comprising the least moving and wearable parts. Shape of the groove sections allows an accelerated and/or de-accelerated forward and backward movement of the first element that allows it to be used for various applications in a bore hole.
EFFECT: higher reliability of the agitator with efficiency of its use.
13 cl, 6 dwg
