RU2168615C2 - Method of treatment of liquid flow in pipeline - Google Patents

Abstract

FIELD: oil producing industry, particularly, method of treatment of oils an water-gas-oil mixtures. SUBSTANCE: method includes treatment of liquid flow with magnetic or some other physical field. Flow is treated with magnetic field set up by magnetic members installed successively in tube and directed to one another with their like poles. In so doing, thermodynamic and rheophysical characteristics of liquid are changed. Flow of this liquid is created by provision of turbulent system of expansions-contractions in unit of pressure treatment. For this purpose, magnetic members are made of different diameters. EFFECT: higher efficiency of flow treatment due to reduced hydraulic resistance of pipeline an increased its carrying capacity. 1 dwg, 1 tbl

Description

 The invention relates to the oil industry, and in particular to a method for processing oils and gas-oil mixtures.

 Known methods and devices for processing products of producing wells, including processing the flow of products by a magnetic field (1).

 The device for magnetic treatment consists of several permanent magnets of the same type, fixed coaxially in the tube on a rod of non-magnetic material and mounted by the same poles to each other.

 This method increases the throughput of pipelines by regulating the rheophysical characteristics of oils and water-gas-oil mixtures, but, as experiments show, simultaneous processing with two physical fields is more effective (2).

 The known device for magnetic processing consists of the same type of permanent magnets and therefore does not allow to sufficiently regulate the dynamics of changes in the intensity of the magnetic field acting on individual elements of the liquid volume during their movement along the device. This is a drawback, since laboratory experiments (2) and theoretical studies (3) showed that the limits within which the intensity of an alternating magnetic field changes significantly affect the magnitude of the magnetization effect.

 The closest solution (prototype) is a method and a device for processing the flow of production of producing wells by two different physical fields by combining electric, magnetic fields and pressure pulses (bar treatment) (4).

 According to this method, magnetic field processing is combined with pressure pulse processing.

 The node for magnetic processing of the fluid flow in the device is the same as described above and has the same disadvantages.

 An assembly for barotreating a device is a container in which pressure pulsations are created, for example, by means of a pump and a valve. However, this device does not allow to ensure the continuity of the fluid flow during bar processing.

 The disadvantage of this method is that the pulsed pressure change does not allow the influence of shear deformations on the rheophysical characteristics of the flows (pressure pulses only lead to volumetric deformations).

 The purpose of the invention is to increase the efficiency of the method of processing a fluid flow by two physical fields - magnetic and hydrodynamic - fields due to which there is a decrease in hydraulic resistance and increases the throughput of the pipeline.

 This goal is achieved by the fact that the fluid flow is treated with an adjustable magnetic field created by magnetic elements, mounted alternately and directed by the same poles to each other and exposed to the turbulent hydrodynamic field in the direction of flow in the direction of flow, made in the form of magnetic elements of different diameters sequentially installed in the pipe .

 The drawing shows a diagram for processing fluid flow.

 Processing the fluid flow is as follows.

The scheme consists of coaxially mounted magnetic elements 8 of various diameters 1, 2 mounted in a pipe 8, fixed on a rod 3 of non-magnetic material with nuts 4, into which non-magnetic centralizer rods are screwed at an angle of 120 ^{o to} each other. Between the magnetic elements are placed bushings 5, also made of non-magnetic material. Magnetic elements are a pair of cylindrical permanent magnets installed by the same poles to each other and separated by disk-bushings 7 of non-magnetic material.

 When processing the fluid flow with magnetic and turbulent hydrodynamic fields variable in the direction of the flow, the thermodynamic and rheophysical characteristics change, as a result of which the hydraulic resistance decreases and the throughput of the pipeline increases.

 The proposed introduction of magnetic elements of different magnetic forces allows you to adjust the gradients of the generated magnetic field in the desired range. Treatment with an alternating hydrodynamic field in a system of expansions — flow constrictions dramatically increases the efficiency of impact on rheophysical properties due to the simultaneous creation of volumetric and shear deformations. It should be noted that at the same time traditional barrowing is also performed, since when the speed changes in the constrictions - expansions, the pressure value also changes (according to the Bernoulli law).

 An example of practical application.

 The effectiveness of the method under consideration was tested during laboratory studies of changes in the capacity of the capillary during the flow of oil-water mixture under the influence of various types of treatments. During the experiments, the flow of water-oil mixture before entering the capillary was subjected to magnetic field treatment, bar processing and bar magnet processing according to the proposed scheme.

The table shows the flow rate (in 10 ^-6 m ³ / s) of the oil-water mixture obtained at various values of the pressure drop applied to the ends of the capillary. The viscosity of the mixture was 75 MPa • s.

 Note that the barotreatment during these experiments (see line 2) was carried out by the prototype device using pressure pulses with an amplitude of 3 MPa with a frequency of 5 pulses per minute.

Magnetic processing (3rd row of the table) is carried out by the prototype device, which allows reaching magnetic field strengths of 40-10 ³ A / m.

 Baromagnetic processing was carried out by an experimental laboratory sample of the proposed device, consisting of magnetic elements with a diameter of 10 mm and magnetic elements with a diameter of 7 mm, mounted alternately on a stainless steel rod and separated from each other by aluminum bushings 8 mm wide. Magnetic elements are a pair of cylindrical magnets 3 mm wide, directed by the same poles to each other and separated by aluminum hub discs 3 mm wide.

 As can be seen from the table, the application of the proposed method allows to increase the efficiency of processing the fluid flow by physical fields.

 The use of the invention allows to reduce hydraulic resistance and increase the throughput of the pipeline.

Sources of information
1. Technology for restoration of well productivity based on the use of physical fields / RD 39 - 0147035 - 218 - 88. - M., VNIIneft, 1987.

 2. Mirzadzhanzade A.Kh., Aliev I.A., Yusifzade H.B. and other fragments of the development of offshore oil and gas fields. - Baku: Elm publishing house, 1997.

 3. Davidzon M. I. On the effect of a magnetic field on weakly conducting aqueous media / Izv. Universities, ser. Physics, 1985, N 4.

 4. RF patent N 2077659, E 21 B 43/00. publ. BI N 11, 1997.

Claims (1)

 A method of treating a fluid flow in a pipeline with magnetic and other physical fields, characterized in that the fluid flow is treated with a magnetic field created by magnetic elements installed in series in the pipe directed by the same poles to each other, while changing the thermodynamic and rheophysical characteristics of the fluid, the flow of which is created by turbulent a system of extensions-constrictions in the bar processing unit, for which the magnetic elements are of various diameters.

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