RU49892U1 - DEVICE FOR MAGNETIZATION OF OIL-BASED LIQUIDS - Google Patents

Abstract

The utility model relates to the field of oil production and can be used for magnetic treatment of well fluids in order to prevent scaling on the elements of submersible centrifugal pumps (ESP).

The technical solutions used in the utility model are aimed at increasing work efficiency, increasing the service life and improving the manufacturability of its use.

The device comprises a housing 1 of a non-magnetic corrosion-resistant pipe, a magnetic system of permanent magnets 2 and shanks 3 and 4 for mounting the device on a pump and / or for connecting devices in series with each other.

Description

The utility model relates to the field of oil production and is intended for magnetic treatment of well fluid in producing wells in order to prevent salt deposits on the bodies and working bodies of submersible centrifugal pumps (ESPs).

In the power system, magnetic treatment of feed water is widely used to prevent scaling on the heat transfer surfaces of heaters (1).

Also known are devices for magnetizing oil wells for controlling salt and paraffin deposits on tubing and elements of submersible electric centrifugal pumps (2,3). The closest technical solution is the magnetic activator МАС70 / 130 (3), consisting of a system of permanent magnets, a casing, a centralizer at the front end and a threaded shank at the rear end for mounting on a protected pump.

The specified prototype has a number of the following significant disadvantages:

- only part of the borehole fluid, which flows between the magnets and the casing of the device, is subjected to magnetic processing, which indicates a low efficiency and, accordingly, low efficiency of the device,

- the design of the activator is leaky, and its magnets are not protected from the effects of the aggressive environment of the oil well, which significantly reduces the service life of the device;

- due to the presence of a thread at only one end, it is impossible to assemble links from such devices by connecting them in series; for the same reason, there is no possibility of attaching to the device additional technological equipment (depth gauge, pressure sensor, container with chemicals, filters, etc.).

The purpose of the utility model is to create a device devoid of the above disadvantages of the prototype.

The stated goal is achieved by the fact that the device for preventing scaling on the casing and working bodies of submersible centrifugal pumps contains a permanent magnet magnetic system enclosed in a sealed non-magnetic corrosion-resistant casing having shanks on both ends with an inner (on one end) and an outer (on the other)

end) with a thread for the possibility of connecting the device to links of several pieces, as well as for the possibility of mounting additional downhole processing equipment on the device (if necessary). At the same time, all of the borehole fluid entering the ESP is processed by the magnetic system in the working gap.

Figure 1 shows the appearance of the inventive device, figure 2 schematically shows the path of the magnetic field lines in the working gap for magnetic processing of the well fluid received at the ESP, figure 3 shows the installation of the device on the pump (dotted line shows the installation of devices when connected them to the links.

The device comprises (Fig. 1) a housing 1 of a non-ferromagnetic corrosion-resistant pipe, a magnetic system of permanent magnets 2, shanks 3 and 4 with internal and external threads, respectively, for mounting the device on a protected pump (or other downhole equipment), as well as for connecting each other with a friend in the links.

The device is mounted (figure 3) using a thread below the protected pump (directly on it or on its elements). All the liquid received at the ESP intake passes in the gap between the claimed device and the production string (Fig. 2) and undergoes multiple magnetization reversal, as a result of which, as is known, salt crystallization centers are destroyed, which, as a result, are not deposited on the pump elements, are carried away with flow to the surface. Permanent magnets of the magnetic system are enclosed in a sealed corrosion-resistant non-magnetic housing, which greatly increases the service life of the device. The presence on the shanks of the internal and external connecting threads allows the device to be connected in series to increase work efficiency or to connect additional technological equipment to the device, if necessary.

Claims (3)

1. Device for magnetizing oil well fluid in order to prevent scaling on the elements of submersible centrifugal pumps, comprising a system of permanent magnets and a housing with tail parts, characterized in that its housing is made of non-ferromagnetic material, and the lines of force of the magnetic system are closed through the working gap and the well string pipes. 2. The device according to claim 1, characterized in that its housing is sealed and made of a corrosion-resistant pipe. 3. The device according to claim 1, characterized in that its tail parts are provided with internal and external threads, respectively.