FIELD: oil and gas production industry, particularly flow string wall surface cleaning of pyrobitumen-tar-paraffin deposits.
SUBSTANCE: device comprises body, turbine-shaped cleaning member, stabilizers and bearing installed on the body. The turbine-shaped cleaning member is of stepped type and arranged in lower device body part. Turbine-shaped member shaft has cylindrical and conical surfaces. Three cutting blades arranged in transversal plane so that 120° angle is defined in-between are mounted on conical surface. Six cutting blades are connected to cylindrical surface and are uniformly distributed around a circle so that the blades are arranged at 60° in transversal plane. Ratio between conical and cylindrical shaft surface lengths is equal to reverse ratio between maximal diameters of circles described by blades along conical and cylindrical shaft surface perimeters is equal to inverse relation between installation blade angles and vertical axis of conical and cylindrical shaft surfaces.
EFFECT: increased reliability and efficiency of device operation.
8 dwg
