RU58603U1 - REAGENT FEEDING DEVICE - Google Patents

Abstract

The utility model relates to the field of the oil and gas industry, in particular, to devices for cleaning oil wells from salt, asphalt-tar and paraffin deposits and corrosion products using a chemical reagent. The reagent supply device contains a container with a reagent, a metering pump and a path between the metering pump and the tubing channel made in the form of a pressure pipe from the metering pump to the wellhead, the annulus channel from the wellhead to the submersible pump and transport channels of the latter to the channel tubing. The device is characterized by advanced technological capabilities and a simpler design.

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Description

The utility model relates to the oil and gas industry, in particular, to devices for cleaning oil wells from salt, asphalt-tar and paraffin deposits and corrosion products using a chemical reagent.

A device for supplying a reagent is known, containing a container with a reagent, a metering pump and a path between the metering pump and the channel of the tubing - patent RU No. 2231628 C1 E 21 B 37/06 on "Device for the metered supply of chemical reagent into the well", publ. 06/27/2004.

According to its features and the achieved result, this device is closest to the claimed one and is taken as a prototype.

A known device for supplying a reagent from a metering pump to receiving a well pump is made in the form of a flexible capillary armored tube fixed on the outer surface of the tubing with an exhaust valve at the end.

The disadvantage of this device is the limited technological capabilities and design complexity.

The limited technological capabilities of the device are explained by the fact that when it is used, the annulus of the well is not cleaned.

The complexity of the design is explained by the fact that replacing a damaged flexible capillary tube with an outlet valve at the end requires removing from the well and disassembling all the tubing with a submersible pump and then assembling them and installing them in the well with a working flexible capillary tube fixed to them.

The objective of the utility model is to expand technological capabilities and simplify the design of the device.

This problem is solved by improving the device for supplying a reagent containing a container with a reagent, a metering pump and a path between the metering pump and the channel of the tubing.

The improvement consists in the fact that the path between the metering pump and the tubing channel is made in the form of a pressure pipe from the metering pump to the wellhead, the annulus channel from the wellhead to the submersible pump and the transport channels of the latter to the tubing channel.

The execution of part of the path between the metering pump and the channel of the tubing in the form of a pressure pipe from the metering pump to the wellhead allows the pressure pipe to be built onshore.

The implementation of the tract in the form of a channel of the annulus from the wellhead to the submersible pump allows you to use it to move the reagent down the annulus fluid due to gravity and uniform dispersion of the reagent in the fluid due to diffusion processes.

The implementation of the tract in the form of transport channels of a submersible pump into the channel of the tubing ensures the suction fluid of the annulus with a uniformly dispersed reagent in it, pumping it and moving the submersible pump along the tubing.

The implementation of the device for supplying the reagent according to the utility model provides the cleaning of salt, asphalt-resin-paraffin deposits and corrosion products of the annulus from the wellhead to the submersible pump along with the transport channels of the latter and the channel of the pump-compressor pipes, thereby expanding the technological capabilities of the device, which also allows the device to be implemented without a pressure pipeline in the annulus of the well and, thereby, simplify its design, as well as installation and dismantling of the device Twa.

Below, with reference to the attached drawing, a description of the proposed device.

The reagent supply device comprises a container 1 with a reagent connected to a metering pump 2 and a path between the metering pump 2 and the channel 3 of the tubing 4.

The path between the metering pump 2 and the channel 3 of the tubing 4 is made in the form of a pressure pipe 5 from the metering pump 2 to the wellhead 6, channel 7 of the annulus from the wellhead 6 to the submersible pump 8 and the suction transport channels 9 and forcing 10 of the latter channel 3 tubing 4.

When the device is operating, the reagent from the tank 1 through the pipe 11 enters the metering pump 2, which is fed to the wellhead 6 through the pressure pipe 5.

In channel 7, the reagent enters the annulus fluid and, under the influence of its own gravity, moves downward along the fluid with simultaneous diffusion in it (due to this, the walls of the annulus are cleaned of salt, asphalt-resin-paraffin deposits and corrosion products and the design of the device is simplified by performing a reagent pressure pipe ground). Then, the reagent, together with the reservoir fluid, alternately passes through the suction pump 9 and discharge channels 10 of the submersible pump and moves it upward along the channels 3 of the tubing 4, ensuring the cleaning of the above path elements from salt, asphalt-tar and paraffin deposits and corrosion products.

A device for feeding a reagent according to a utility model in comparison with the prototype is characterized by advanced technological capabilities and a simpler design.

Claims (1)

A device for supplying a reagent containing a container with a reagent, a metering pump and a path between the metering pump and the channel of the tubing, characterized in that the path between the metering pump and the channel of the tubing is made in the form of a pressure pipe from the metering pump to the wellhead, annulus channel from the wellhead to the submersible pump and transport channels of the latter to the tubing channel.