3M Cold Shrink Tubes For Electric Submersible Pump (ESP) Cable Repair

Published 01 Feb 2019

3M Cold Shrink Tubes - EPDM Rubber

3M Cold Shrink Tubes – EPDM Rubber

  • uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Electrical Submersible Pump (ESP)

Cable Repairs 

Electrical Submersible Pumps (ESP) are used to lift oil from a production well, so it is important that the supply cables are reliable and operate safely for an extended service life in the harshest offshore downhole environments.

The ESP cable used to transmit power and sensor outputs to and from the surface is a key component in an ESP installation. The cable must withstand mechanical abrasion, corrosion, high temperature and pressure and should be available in a variety of cross-sections and configurations so the space the cable takes in the well bore is optimized and it can be installed or retrieved easily.

Schlumberger RedaMAX 400 is a 5kV-8kV high voltage cable designed specifically for use with electrical submersible pumps, however the cable can also be used within onshore and offshore gassy wells and other high temperature applications in the oil and gas industry with ESP systems installed.

The benefits associated with the RedaMAX 400 ESP submersible pump cable include lower life cycle cost, long insulation life and longer ESP system life – with EPDM insulation-jacket compounds, galvanised steel armor and lead barrier the power cables temperature rating up to 232°C provides consistent delivery of electrical power to downhole equipment.

The ESP cable is available in three options including the common round profile option but also a flat cable version – in this post we provide information about cold shrink tubes for use with ESP cable repair applications.

Joints Cables

RedaMAX 400 ESP Cable Specifications

The 3 versions of the Schlumberger RedaMAX 400 cables are available in different voltages :

  • 4kV Flat Cable | Lead Barrier | Galvanised Steel Armor | EPDM Cable Jacket
  • 4kV Round Cable | Lead Barrier | Galvanised Steel Armor | EPDM Cable Jacket
  • 5kV Flat Cable | Lead Barrier | Galvanised Steel Armor | EPDM Cable Jacket
  • 5kV Round Cable | Lead Barrier | Galvanised Steel Armor | EPDM Cable Jacket
  • 8kV Round Cable | Lead Barrier | Galvanised Steel Armor | EPDM Cable Jacket

Cables Nomenclature Guide  ➡

Cold Shrink Tubes

Cold Shrink Cable Repair Tubes

Power Cables Portfolio for REDA ESP Systems

Cable Family Cable Application Cable Construction
REDA MAX 250 Low temperature, low gas PPEO, PP, PTB, POTB
REDA MAX 400 High temperature, moderate gas EE, ETBE
REDA Lead High temperature, gassy, corrosive ELBE, ELB, EHLTB
READ Lead 8kV Deep water, subsea, high temperature, high horsepower ELBE, ELB, EHLTB, SESLTBE


3M EPDM Rubber Cold Shrink Tubes

When repairing Schlumberger RedaMAX ESP Power Cables it is advisable to use the 3M EPDM Connector Insulators 8420 Series Cold Shrink Tubes.

This insulating tube forms part of the wider range of cold shrink tubes available from 3M Electrical and distributed by Thorne & Derrick.

There are many benefits of using cold shrink technology :

  • Simple installation, requiring no tools or heat shrink torches – ideal for “explosive atmospheres” and hazardous area locations
  • Can accommodate a wide range of LV HV cables – Cold Shrink is a versatile cable repair solution
  • Good thermal stability and tight seal around the cable sheath jacket profile
  • Fungus, acid and alkali resistant for onshore and offshore aggressive applications
  • Excellent wet electrical properties for offshore installations

3M EPDM cold shrink tube forms a cable sheath repair when it is applied around the electrical connector and the cable itself.

3M Connector Insulators 8420 Series Cold Shrink Application
Cold Shrink EPDM Tubes - 3M 8420 Series

Insulation of inline conductor transition connectors

 

The insulating cold shrink tube is made from EDPM rubber containing no chlorides and six diameter sizes will cover a full range of 1000 volt cables.

In addition to ESP cables, the 3M 8420 Series EPDM tubes can be used in other applications including dig-in and cable sheath repairs, insulation of secondary cable splices and primary electrical insulation for all solid dielectric (rubber and plastic) insulated wire and cable splices rated to 1000 volts.

3M Cold Shrink EPDM Tubes
Connector Insulator 8420 Series
Selection Table
3M Cold Shrink Tubes Part No Suit Conductor Sizes AWG & Kcmil Min Diameter (mm) Max Diameter (mm) Length (mm)
8423-6 6 – 4 7.8 14.3 152
8425-7 2 – 1/0 9.9 17.8 178
8425-8 2 – 1/0 10.2 20.8 203
8426-11 2/0 – 250 13.0 25.4 279
8426-9 2/0 – 250 13.0 25.4 229
8427-12 250 – 400 17.5 33.0 305
8427-16 250 – 400 17.5 33.0 406
8427-6 +++ 17.5 33.0 152
8428-12 450 – 800 24.0 49.3 305
8428-18 450 – 800 24.0 49.3 457
8428-24 450 – 800 24.0 49.3 609
8428-6 +++ 24.0 49.3 152
8429-12 900 -1000 32.2 67.8 305
8429-18 900 – 1000 32.2 67.8 457
8429-6 +++ 32.2 67.8 229
8429-9 +++ 32.2 67.8 152
8430-18 1250-2000 42.6 93.7 457
8430-9 +++ 42.6 93.7 229
8430-18 1250-2000 42.6 93.7 457
8430-24 1250-2000 42.6 93.7 610

+++ Primary Cold Shrink Use: Sealing cable lugs and terminal barrels, conduit couplings and conduit-to cable breakouts

LV Cable Joints (Low Voltage Cables)

Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.

Complete range of LV Cable Accessories  ➡

Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations

Joints Terminations Connectors

Pfisterer | Nexans Euromold | Prysmian | Cable Joints & Terminations MV HV

Cold Shrink

Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables

Further Reading