WELL REAGENT FEEDER DRIVEN BY CONVENTIONAL PUMPING UNIT Russian patent published in 2011 - IPC E21B37/06 E21B43/00 

FIELD: oil and gas production.

SUBSTANCE: feeder accommodates a dosing pump representing a hydraulic actuator with a piston vertically integrated in a body which comprises a threaded nail in which a dispenser presented by suction and pressure valves provided on an axis perpendicular to a piston axis is mounted. The nail has channels connecting a working cavity of the hydraulic actuator and the valves. One end of the nail is rigidly connected to a piston stopper. The other end of the nail is mounted on a support which represents a hollow cylinder by means of a female and male adjusting nut and is fixed in a through longitudinal slot of the support with the use of a screw-bolt connection, vertically movable and fixed in various positions. The support is jointed on a base which is rigidly fixed on a casing flange. A mechanism of motion transfer from the conventional pumping unit to the dosing pump represents a lever clamped on a polished rod of the conventional pumping unit installed perpendicularly to a rod axis and interacting with a piston rod. The polished rod is connected with a suspension bar of the conventional pumping unit.

EFFECT: higher operation reliability, accuracy of dosing adjustment, maintainability, serviceability and servicing ease.

10 cl, 3 dwg