Electric cable

FIELD: electrochemical industry; power cables for feeding submersible motors of oil pumps.

SUBSTANCE: proposed cable has current-conductors covered with first and second insulating layers, as well as protective pad and armor common for all conductors. Insulation is made of fluorine-containing copolymers which enhances cable thermal stability to 230 °C.

EFFECT: reduced mass and size, enhanced thermal stability of cable.

9 cl, 1 dwg, 1 tbl

 

The invention relates to the field of electrical industry and can be used as an electric power cable to power the submersible downhole electrical device, in particular an electric motor submersible neftenbach.

Currently in the electrotechnical industry of Russia and foreign States developer efforts aimed at solving the problem by creating the power cable, in particular for the petrochemical and gas industry, with reduced size, reduced weight and increased heat resistance.

Known electric cable, armored, which contains three copper wires, a superimposed layer of insulation over the wires insulation is wound protective cushion and armor of profiled steel tape. Between armor and protective pillow on the side surface of the lived performed gap, which provides compensation of stresses during heating cable up to 100-130°WITH (RU, patent 2154319, NV 7/29, 1998).

The reliability of the cable, in comparison with analogues increased, but the temperature operating conditions in the reservoir fluid is not high enough.

Also known cable containing parallel spaced conductive wires, over each of which is an insulation layer made of polymeric material, over which the CSOs applied using a spiral winding with overlapping metal strip, having a polymer coating and is able to specalise in the monolith. On top of the layer of these tapes in each period is applied polymer shell, and all wires are enclosed with a total armor of metal strips superimposed spiral. This cable design ensures a high degree of protection against mechanical impacts, however, the cable has a large weight and low temperature resistance (US patent 4449013, NV 7/22, 1984).

Also known electrical cable used to power the electric motor of the oil pump, the submersible into the borehole, and which is the closest analogue. The cable contains three conductive wires, successively superimposed layers of insulation from a composition based on high density polyethylene, between layers there is an additional element isolation from the Teflon tape, and the cable has a total armor imposed on the pillow.

The task regarding existing at the time of filing analogues resolved: at a temperature of 110-150°insulation resistance and electric strength at the cable remains at the original level (RU, patent 2109359, NV 7/18, 1998).

Given the analogues, however, do not meet modern technical requirements for power cables according to weight, size, heat resistance.

Solved the technical problem for luchetta in the development and creation of power cable, can withstand high mechanical and thermal loads, as well as in reducing its weight.

Technical result achieved is to reduce the weight of the cable, reducing the size and improving its heat resistance.

This technical result is achieved in that the electric cable includes three conductive wires are parallel in one plane, each covered with the first insulating layer in the form of polyimide-fluoropolymer film connected to the conductive housing by sintering, the other two layers: a second insulation and sheath, and the second insulation layer and a shell made of forsuperior and are connected to each other and the first insulation layer extrusion, a protective cushion located on the last layer of ftoropolymer and ponpoko located on top of the protective cushion, and that

polyimide-fluoropolymer film covers the copper core with an overlap of 50%;

as forsuperior use tetrafluoroethylene with HEXAFLUOROPROPYLENE;

as forsuperior use polyvinylidene fluoride;

as forsuperior use tetrafluoroethylene with ethylene;

as forsuperior use tetrafluoroethylene with performanceperformance esters;

the second insulation layer is made of a thickness of 0.6-0.8 mm;

the third layer,a shell, made with a thickness of 0.9-1.1 mm;

protective cushion is made of nonwoven material, for example, from a tape bonded needle-punched fabric;

the ribbon is in three layers;

the first layer of tape imposed across three parallel insulated conductive wires, with an overlap of 10%, the other two layer longitudinally above and below the first layer;

ponpoko, in the form of a metal tape with EP profile superimposed on a protective cushion with an overlap of 50%;

ponpoko made tape galvanized steel;

ponpoko made a tape of corrosion-resistant alloys;

EP profile has a cross section shape of the letter "S";

The drawing shows the design of the proposed electric power cable. In this specific example, the cable contains three conductive wires 1, arranged in parallel in the same plane, the first layer 2 isolation, the second layer 3 isolation, the third layer 4 shell covering each of the conductive wires 1, on top of layer 4 shells each lived 1 is a General protective cushion 5. Insulated and covered with a protective cushion 5 wires 1 have a common ponpoko 6. The conductors 1 made of copper or of identical electrical and mechanical properties of the metal or alloy. In this case, copper conductor MM brand manufacturing is established with representation from copper billet ATU 1844-01-48564189-2000. Copper conductor 1 wrapped polyimide-fluoropolymer film (the first layer 2 isolation) with 50% overlap, with the subsequent zapekaniem in the oven. Used film marks the TFM-With-352, while the base film is a polyimide with a thickness of 30 μm on each side applied fluoropolymer suspension thickness of 10 μm. Since the winding is carried out with an overlap of 50%, the first layer 2 isolation is obtained with a thickness of 100 μm. Then on top of the first layer 2 isolation extruded second layer 3 isolation of forsuperior with a thickness of 0.7 mm In this case as the primary insulation material in the manufacture of pulp and paper products cable applied tetrafluoroethylene with HEXAFLUOROPROPYLENE. This copolymer has a high elektroizolyatsionnymi properties at elevated temperatures (up to 230° (C) and extremely resistant to various corrosive environments.

You can use other ftoropolymer, processed by extrusion, such as polyvinylidene fluoride, tetrafluoroethylene with ethylene, tetrafluorethylene with performanceperformance esters. The maximum working temperature of the cable will meet the maximum permissible operating temperature of the applied forsuperior. In this case, you use persepolitan 4MB (f-4MB), can also be used to foreign analogues. Then on the second insulation layer 3 is applied(extruded) shell 4 also of tetrafluoroethylene with HEXAFLUOROPROPYLENE a thickness of 1 mm Then three parallel, insulated with a layer 3 and hidden in the shell 4 wires 1, superimposed General protective cushion 5 of the tapes thermally bonded needle-punched fabric, this protective cushion 5 consists of three bands: one wrapped around three parallel insulated conductors with an overlap of 10%and the other two superimposed ribbon longitudinally wrapped on the blank top and bottom (in order to avoid cluttering the drawing shows a portion of the protective cushion 5: cross tape around the insulated conductors). Over protective cushion 5 is superimposed ponpoko 6, which is made of galvanized steel strip with a width of 15 mm with an overlap factor of 50%. Can be applied tapes from other corrosion-resistant metals or alloys. To increase the mechanical strength of ponpoko 6 made of a metal strip having EP profile, and EP profile has a cross section shape of the letter "S".

The examples do not limit the claims of the applicant and illustrate a preferred implementation of the invention.

Comparative testing of cable PTFE KIFBP and cable leaded CECBP (produced by the plant). At the same electrical properties of cables cable with fluoroplastic insulation and the claimed design compared to swins the new cable has a number of advantages:

- at the same cross-section of the conductors cable weight per unit length is almost two times less;

geometrical dimensions of the cable is 30% less than that of lead.

Comparative data is shown in the table.

The number and cross-section TPG, sq. mmCable weight kg/kmMaximum dimensions width x height, mm
Brand KIFBPBrand CASPRBrand KIFBPBrand CASPR
3×100,8751,58012×2613,3×32,5
3×161,1302,24513×2915×37,6
3×251,4702,47014×3216,2×41,2

Because manufacturers do not publish the absolute parameters of products, comparative data on the proposed cable and manufactured at the present time.

Thus, due to the cable design and materials received high mechanical characteristics, while significantly decreased the geometric dimensions of the cable, which is very important when space is limited oil wells is, significantly reduced the weight of the cable and its working temperature is increased to 230°C.

1. Cable, electric, characterized in that it consists of three conductive wires arranged in parallel in one plane, each covered with the first insulation layer in the form of polyimide-fluoropolymer film connected to the conductive housing by sintering, the other two layers, the second insulation and sheath, and the second layer of insulation and jacket are made from forsuperior, for example, tetrafluoroethylene with HEXAFLUOROPROPYLENE, or polyvinylidene fluoride or tetrafluoroethylene with ethylene, or tetrafluoroethylene with performanceperformance esters, the second insulation layer is made of a thickness of 0.6-0.8 mm, and a layer made of a thickness of 0.9-1.1 mm, and connected with each other and with the first insulation layer extrusion of the protective cushion, located on the shell and located over protective cushion buenaobra.

2. The cable according to claim 1, in which the polyimide-fluoropolymer film covers the copper core with an overlap of 50%.

3. The cable according to claim 1, in which the protective cushion is made of nonwoven material, for example, from a tape bonded needle-punched fabric.

4. The cable according to claim 3, in which the ribbon is in three layers.

5. The cable according to claim 4, in which the first layer of tape imposed across three parallel is polerowanie the conductors, with an overlap of 10%, the other two layer longitudinally above and below the first layer.

6. The cable according to claim 1, in which ponpoko imposed on a protective cushion with an overlap of 50%.

7. The cable according to claim 1, in which ponpoko made of galvanized steel tape.

8. The cable according to claim 1, in which ponpoko made of tape-based corrosion-resistant alloys.

9. The cable according to claim 1, in which ponpoko made of metal tape with EP profile, and EP profile has a cross section shape of the letter "S".



 

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