SU1270300A1 - Apparatus for metered feed of chemical agent into well - Google Patents

Description

The invention relates to oil production and can be used to feed chemical reagents into wells with the aim of preventing wax deposits and salts, equipment corrosion and downhole oil demulsification.

The purpose of the invention is to improve the reliability of operation at low temperatures and simplify the design of the device.

FIG. 1 shows schematically the proposed device, a general view; in fig. 2 - chemical tank, top view.

The container 1 through the throttle unit 2, the droplet generator 3 installed in the chamber 4 with the viewing window 5, and the chemical line 6 for the chemical agent is connected to the annular valve 7 of the well 8. The upper part of the container is connected with the internal one through the pipe 9. the space of the chamber 4 of the droplet-forming agent 3, as well as through the pipeline 10 and the valve 11 - with the tank 12. A valve 13 is installed on the pipeline 10 to drain the gas from the tank 1 when it is filled. Tank 12 is installed on tank 1, and the tank is on stand

14 so that the pipeline 6 along its entire length has a slope in the direction of the well.

Capacity 1 consists of nozzles

15-17, which ends are welded to each other so that they form a closed loop in the horizontal plane. Depending on the required capacity of the tank 1, the number of nozzles can be changed.

The device works as follows

With valves 11 and 13 open and. the closed valve 7, the tank 12 and the tank 1 are filled with a chemical agent. Then the veins. Tyles 11 and 13 are closed, the back: the open 7 is opened and, the degree of opening of the throttle unit 2 is changed, the

required chemical consumption. The flow rate is determined by the number of droplets falling per unit time, observed through the viewing window 5. The total flow rate can also be determined by the change in the level of the chemical agent in the tank 1.

From the chamber 4 chemical agents 3 chemical agents along the lower part of the section

pipeline 6 through the valve 7 flows into the well. Through the free upper part of the pipeline section, gas from the well enters the chamber 4 of the droplet former 3 and through the pipeline

9 - in the upper part of the tank 1, taking the place of the spent chemical agent. The pipeline line 6 is not less than 5 m, since the container with flammable chemicals according to the established standards should be placed at that distance from the well. Wet at the same time the inner surface of the pipeline 6 and absorbing moisture from the gas that flows

the chemical prevents the formation of hydrate plugs in the pipe 6. This ensures non-stop dosing of the chemical at low temperatures.

Claims (1)

Invention Formula A device for dispensing chemical reagent into a well, containing a container with a pipeline for a chemical reagent and a throttle assembly installed in the pipeline and a dropper forming agent with a viewing window, characterized in that In order to improve reliability at low temperatures and simplify the design, the upper part of the tank has a pipeline for communication with the internal cavity of the droplet-forming agent, and the tank is made in the form of interconnected branch pipes of the same diameter, forming a closed loop in the horizontal plane.