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business group Tekhnologiya metallov

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Heating cables of wells

Description

Cables type KGn

Load carrying heating cables KGn are designed for electric heating of oil wells equipped with electric centrifugal pumps, injection wells, water wells, by lowering of the cables directly in tubing to prevent an appearance of paraffin hydrates.

The cables KGn are developed on GOST R 51978-2002 Load carrying armoured logging cables and TU 3585-002-24118545-2004, certified and qualified by Federal Authority of Ecological Technological and Nuclear Control, covered by patent No 35823 of Russian Federation.


Specifications

Type of cable

Breaking strength not less

Advised length

Max.operating temperature

Outer diameter of cable

Weight 1 km in air

Weight 1 km in water

KGnMP-14/22,0-55-100-

55

1100-1300

100

27

1220

713

KGnMP-12/21,5-50-100-

50

900-1100

100

25

1056

525

KGnAP-12/42,0-50-90-

50

700-900

90

27

856

325

KGnAP-14/22,0-50-90-

50

800-1000

90

27

865

334

Table 2 Electrical properties

Type of cable

Number and section of conductors, n x mm2

Number of groups

Resistance of one conductor, Ohm/km

Resistance of insulation, MOhm*km

Maximal operating current (DC/AC), A

Typepowervoltage

KGnMP-14/22,0-55-100-

14  x  1,5

7+7

9,57

20 000

140/-

Direct

KGn MP-12/21,5-50-100-

12  x  1,5

6+6

12,4

20 000

130/-

Direct

KGn AP-12/42,0-50-90-

12  x  2,0

4+2+2+4

15,8

20 000

110/73

Direct

KGnAP-14/22,0-50-90-

14  x  2,0

7+7

15,8

20 000

120/-

Direct

Cables type KnP

Since 2004, OOO Pskovgeokabel produces the cables for heating of wells equipped with rod or depth pumps through heating cables set outside of production tube. Heating cable is flat shaped and installed outside of production tubing same way as power cable for oil submersible pumps.

Despite less effective heat transfer of setting the cable this way, available data showed that these systems are fully compatible to prevent paraffin formation in wells equipped with rod depth pumps. The experience of periodical operation of installations is available, i.e. heating for 24 hours followed by several days of pause that coincides with circles of washing wells with hot oil, but use of hot oil is excluded now. Periodical mode is favorable saving the costs and power consumption. However, despite the fact that supplied equipment allows to choose this mode, possibility and parameters of periodical heating are selected by technical service of oil productive companies because in this case the most important factor is a composition of well fluid, percentage of paraffin content, rate of its formation etc. 

Table 1 Mechanical properties

Type of cable

Minimal length of supply, m

Dimension, mm

Weight of 1 km, kg

Number of group of conductor

 Powerdensity, W/m

KnPMSP (6/22,0)-90

850

10,526

1041

2

50

KnPMSP (8/22,0)-90

1000

10,534

1070

2

60

KnPMSP (8/23,1)-90

1000

10,534

1084

2

55

Table 2 Electrical properties

Type of cable

Number and section of heating elements, N x mm

Power voltage

Resistance of one conductor of heating element, Ohm/km

Resistance of insulation, MOhm*km

Maximalcurrent, A

KnPMSP (6/22,0)-90

62,0

Direct

8,7

10 000

95

KnPMSP (8/22,0)-90

82,0

Direct

8,7

10 000

120

KnPASP (8/23,1)-90

83,1

Direct

9,1

10 000

120




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