FIELD: oil and gas production.
SUBSTANCE: mandrel for placement of gravel fill is used in unit for arrangement of solid particles inside borehole and consists of mandrel case with upper and lower edges positioned along lengthwise axis and of axial channel of specified diameter passing through case. Additionally, the case has the first side orifice for outlet of suspension, passing through the mandrel case, the second side orifice of suspension outlet passing through the mandrel case, set off along axis and lower, than the first suspension outlet orifice on the mandrel case, and a mechanical device for flow balancing to facilitate relatively equivalent rates of flows through the said first and second orifices of suspension outlet.
EFFECT: prevention of erosion and wear of mandrel.
16 cl, 7 dwg
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