FIELD: oil and gas industry.
SUBSTANCE: device includes tubing string, packers installed above formations and arranged in tubing string, coupling arranged under packers with non-crossing longitudinal and radial channels. At that axial channel of the coupling arranged above is larger than that of the coupling arranged below. In device there are two or three replaceable dosing plugs installed in couplings. Couplings housings are provided with dosing nozzles. Each plug corresponds to size of coupling axial channel where the plug is to be installed. Lowering and removal of plugs is to be done using a grab on wire or rope with hook to upper plug.
EFFECT: possibility of agent pumping to two or three formations and of control of pumped agent flow in formations.
1 dwg
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