FIELD: well building, particularly for generating vibration in pipe string.
SUBSTANCE: device includes string of pipes filled with working liquid and mechanism for applying vibration to pipe string formed as member with positive floatage immersed in working liquid. Member closes 0.85 - 0.98 of flow pipe string area and has unlimited number of degrees of freedom in working liquid flow. In accordance with the second embodiment support for ball is formed as cross-piece fixedly connected to cylindrical spiral spring. Spring constant is selected on the base of calculation of axial load from ball and flow head at basic flow rate of working liquid. Speed of mechanism lowering at basic flow rate is equal to zero.
EFFECT: reduced friction during pipe string movement inside well and blockage prevention.
3 cl, 3 dwg
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