DIAL Cablehead Termination | High reliability testable TEC connections


DIAL in-well units are connected to surface via a Tubing Encased Conductor (TEC). This provides power and communication.

The DIAL Cablehead Termination allows electrical communication between the TEC and the DIAL Units while offering protection from the harsh downhole environment.

Internally, the termination provides a pluggable electrical interface that can be made up on the rig floor during completion operations or off-line ahead of time. Externally, it uses industry standard gas tight cone-and-thread as well as ferrule-style seals to protect the internals from well fluids. After makeup, these seals are fully pressure testable before being installed in the well.

Integral to the DIAL Unit there is also a redundant GTMS (Glass to Metal Seal). This isolates the unit’s electronics from the inside of the Cablehead Termination in case there is eventual gas ingress.


  1. All DIAL installations

    Supplied with all concentric, slimline and sensing DIAL units.

  1. Assuring reliability

    Made up and integrity tested prior to and during installation.

  1. Splice kits

    Available for planned splices or well-site repair of damaged TEC.


  1. Preassembled with pluggable electrical connectors and no crimps
  2. Easily reconnectable at the wellsite with no additional equipment cost
  3. Industry standard and proven metal-to-metal seals
  4. Pressure testable in the shop and at the rig-floor
  5. Includes redundant Glass to Metal Seal (GTMS) to protect DIAL unit electronics from gas ingress


  1. Ease of installation by field crew with reduced rig time compared to non “plug-n-play” systems
  2. Accommodates un-planned adjustments to completion configuration
  3. Reliable gas-tight connection assures life-of-well provision of power and communications to DIAL system
  4. Assured and verifiable for reliability of interface between TEC and cablehead termination
  5. Further assure reliability of DIAL production optimization system


Dimensions OD 1.100 in | 27.0 mm
Length 9.90 in | 252 mm
Electrical Connection Pluggable
Rating 150 V | 1 A
Mechanical Connection

Cone-and-thread and/or ferrule style

Seal Metal-to-metal
Verification Field Testable


Collapse 10,000 psi | 689 Bar
Burst 10,000 psi | 689 Bar

Max = 302 deg F | 150 deg C

Min = -4 deg F | -20 deg C


Metallurgy Alloy 825
Critical Seals Electron Beam Welded | Metal-to-metal | FKM
Connection Plug-n-play pin


TEC Connections ¼” Tubing Encased Conductor | 3 Conductor
TEC Metallurgy 316 SS & Inconel 825
Note: INCONEL® is a registered trademark of the Special Metals Corporation group of companies.

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