EQUIPMENT FOR REAGENT SUBSURFACE DOSAGE INTO WELL WITH PUMPING UNIT DRIVE Russian patent published in 2010 - IPC E21B43/00 E21B37/06 

FIELD: oil-and-gas industry.

SUBSTANCE: equipment includes located under a pump and stiffly connected to it container for reagent and dosing tank, consisting of a void cylinder with a vertical channels, connected to well fixing unit, stiffly connected to the case container dosage unit with a cavity, which fills in with a well fluid and gas during operation, creating container-case system. Inside of the case a plunger located, which stiffly connected with the void cylinder and stop blocks. The container - case system executed with ability of reciprocating displacements, relatively to plunger. In the dosage unit upper part located a gateway, stiffly connected and which has a lateral and longitude channels for the reagent, well fluid and gas bypassing. Inside of the gateway a valve ball located, with a cone landing place on the end of the longitude channel as its upper seat. Its bottom seat is a ring, installed in the dosage unit case. The plunger has axial channels. At plungers top part a measuring unit located, which consists of a measuring ring with sealing elements, creating reagent measurement cavity with the valve bottom seat internal wall. A Stop ring and the valve ball are the container-case system stop blocks.

EFFECT: reagent dosage efficiency increase, simplified design, life time increase.

6 cl, 1 dwg