RU200427U1 - ELECTRIC CABLE FOR SUBMERSIBLE ELECTRIC PUMP UNITS - Google Patents

Abstract

The utility model relates to cable technology, and more specifically to the structures of an electric cable for installations of submersible electric pumps. The conductors are made of a heat-resistant aluminum alloy modified with rare earth metals. The aluminum alloy used is TAS or ACE-O alloys. A sublayer of PET film of grade E was applied over each conductive conductor. On top of the insulated conductive conductors, a cushion made of tape (tapes) was wrapped by the winding method and armor made of profiled steel galvanized or corrosion-resistant tape. The technical result is an increase in the service life of the cable. 3 C.p. f-ly, 1 dwg

Description

The technical field to which the utility model belongs

The utility model relates to cable technology, and more specifically to electrical cable structures for submersible electric pump installations, which are used to supply electrical energy to submersible electric motors for oil production from wells, water lifting and pumping liquids from pits, reservoirs and reservoirs.

State of the art

An electric cable for installations of submersible electric pumps is known from the prior art (Patent RU 161762 publ. 10.05.2016). The design of the cable includes conductors made of heat-resistant aluminum alloy, insulated with modified polyethylene, a common sheath made of propylene composition, a common cushion for armor made of non-woven fabric, armor made of profiled tape made of corrosion-resistant alloys, and the armor cover is applied with a special profile to avoid damage during the process tripping operations on wells, as well as with a gap to reduce the compressive loads of the armor cover.

An electric cable is also known (patent RU 190643 publ. 08.07.2019). The cable contains conductive conductors made of aluminum-zirconium alloy TAS-25 modified with nickel, insulation and protective sheath of conductors, protective cushion and armor cover.

However, the given devices do not have sufficient reliability.

A close analogue is an electric cable for installations of submersible electric pumps (Patent RU 118789 publ. 07/27/2012), containing conductive conductors of aluminum or copper-plated aluminum or its alloys, modified with rare or rare-earth metals from the group: zirconium, scandium, yttrium, cerium, lanthanum , vanadium, hafnium or their mixtures, insulation and protective sheathing of the cores, as well as a protective cover made of cushions and armor. The conductors are made of heat-resistant aluminum alloy TAS, modified with zirconium.

The disadvantage of the cable is its low manufacturability as a result of the formation of local hardening on the surface of the wire during its processing and a decrease in the electrical characteristics of the insulation.

The essence of the utility model

The technical problem being solved consists in the development and creation of an electric cable for powering electric motors of submersible oil pumps with improved electrical and mechanical characteristics of cable insulation, as well as increasing manufacturability.

The achieved technical result is to increase the service life of the cable.

The technical result is achieved by the fact that in an electric cable, including three conductive conductors of a heat-resistant aluminum alloy modified with rare earth metals, insulation, a protective cover made of cushion and armor, according to the proposed solution, a sublayer of PET film is applied to each conductive conductor, on top of which is not applied less than two layers of insulation made of a propylene / ethylene block copolymer composition.

As an aluminum alloy, you can use an alloy of the TAS grade or the ACE-O grade.

The armor can be made of profiled galvanized steel or corrosion-resistant tape. The figure shows a general view of the cable.

In the figure, the structural elements of the electric cable for powering the electric motors of submersible oil pumps are indicated by the following positions:

1 - conductive conductors;

2 - PET film underlayer;

3 - insulation;

4 - pillow;

5 - armor.

Implementation of the utility model

The cable consists of three conductive cores 1, which are located in parallel in the same plane or twisted together. The conductors are made of a heat-resistant aluminum alloy modified with rare earth metals. The aluminum alloy used is TAS or ACE-O alloys. On each conductive core, when the main insulating layer 3 is applied, it is simultaneously applied by the method of underlaying 2 made of PET film of grade E. On top of the insulated conductive conductors 1, a pillow 4 made of tape (tapes) is wrapped by the winding method and armor 5 made of profiled steel galvanized or corrosion-resistant tape.

The underlayer made of PET-E film has high values of dielectric strength (at an alternating voltage of 50 Hz frequency) in a wide temperature range: at room temperature - not less than 220 kV / mm, at 155 ° С - not less than 150 kV / mm ... As a result, the electrical properties of the insulation are increased. The dielectric strength of the propylene-ethylene block copolymer (at an alternating voltage of 50 Hz) is 38 kV / mm.

The claimed electric cable meets the criterion of "industrial applicability", since it can be repeatedly produced and used for its intended purpose with the achievement of the specified technical result. The manufacture of the cable does not cause difficulties for specialists in this field. All materials used in the construction of the cable are known and commercially available. The cable is manufactured on the basis of well-known equipment, materials and technologies existing in the cable industry and used in the production of electrical cables.

Claims (4)

1. Electrical cable for submersible electric pump installations, including three conductors made of heat-resistant aluminum alloy modified with rare-earth metals, insulation, a protective cover made of cushion and armor, characterized in that a sublayer of PET film is applied to each conductive conductor, on top of which at least two layers of insulation made of a propylene-ethylene block copolymer composition. 2. An electric cable according to claim 1, characterized in that an alloy of the TAS brand is used as the aluminum alloy. 3. An electric cable according to claim 1, characterized in that an alloy of the ACE-O brand is used as an aluminum alloy. 4. An electric cable according to claim 1, characterized in that the armor is made of profiled steel, galvanized or corrosion-resistant tape.

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