The invention relates to metering devices for feeding small amounts of reagents in high pressure wells and may be used in the oil and gas industries.; The purpose of the utility model - expansion of functional reagent dosing capabilities under varying operating conditions well and improve its reliability, ease of operation.; This object is achieved in that the wellheads dispensing device comprising a container with a replaceable nipple, separating it from the gas seal coupled with the annular gas space of the well and with the container via the equalizing pipe whose outlet is located below reactant layer and above the axis of a removable spout, provided with a reflux a valve disposed in the upper part of the tank connected to the equalizing tube and a replaceable nipple is equipped with a fine filter. In addition, for adjusting the position of the lower end of the equalizing tube in the container relative to the axis of the union, an equalizing tube is connected with the gas gate via a rubber-reinforced high pressure hoses, and equalizing the input space of the tube into the tank and the check valve provided with sealing elements. Wherein the container has three adjustable supports intended to equalize the level of the gas seal axis with the axis of the annulus line when mounted on the wellhead.; Equipment additional dosing device non-return valve and a fine filter it provides high reliability, stable reagent dosing regimen and preventing emission reagent; through the equalizing pipe when the pressure fluctuation during operation of the well. Additionally, due to quick couplings and adjustable feet container dispensing device easily aligned with the axis of the valve annulus during installation wells.
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