Slimline DIAL Units | Dual-string gas lift & smaller diameter casing


DIAL units are the primary in-well control and monitoring component of Silverwell’s Digital Intelligent Artificial Lift production optimization system.

Each tubing deployed Slimline DIAL unit has up to three independently actuated gas lift injection valves. Custom orifice configurations are selected to match predicted gas injection needs across a well’s operating life.

Multiple DIAL Units can be installed with a single Tubing Encased Conductor (TEC) providing real time control of injection rate and depth. Integral Check Valves qualified to API 19G2 assure well integrity and are immune chatter that plague conventional gas lift systems.

Continuous downhole permanent monitoring data informs production and reservoir management decisions including automated gas lift production optimization.

DIAL increases production and reduces cost with interventionless operation that dramatically reduces HSE risk. DIAL also enables deeper injection to maximize drawdown and efficient use of available lift gas.


  1. Dual-string wells

    Integrate in-well monitoring and lift gas injection adjustment to optimize both producing zones without intervention.

  1. Smaller diameter casing

    Slimline configuration for interventionless gas lift optimization of single string completions in smaller casing sizes.


  1. Slimline eccentric design for dual string completion
  2. Integrated back-pressure valves
  3. Tubing & annulus pressure and temperature sensors
  4. No gas-charged bellows
  5. Unlike conventional valves, no casing pressure loss when transferring stations
  6. Testable cableheads and E-Beam welded construction
  7. Interventionless and remote operation
  8. Low power draw
  9. Onboard condition monitoring


  1. Independent control of gas lift to both producing zones
  2. Qualified to industry standards to maintain well integrity
  3. Real-time visualization of flowing gradient and in-well lift gas injection rate to assess well performance for date-driven decisions
  4. Consistent valve performance, regardless of well conditions, and eliminates chatter or multi-pointing
  5. More efficient use of available lift gas to inject deeper and/or lift more wells with the same available compression horsepower and less injection stations
  6. Hermetically sealed electronics enables life-of-well reliability
  7. Continuous production optimization with reduced logistics costs less HSE risk exposure
  8. Solar powered operation in remote environments
  9. Feedback of correct valve actuation and overall system health


2-7/8" 3-1/2"
Dimensions OD 4.449
in | 113.0 mm
in | 130.8 mm
ID 2.441
in | 62.0 mm
in | 75.3 mm
API Drift 2.347
in | 59.6 mm
in | 72.8 mm
Eccentricity 0.591
in | 15.0 mm
in | 15.8 mm
Connection Type JFE
Bear or EUE

Custom threads available on request
Weight 6.4
Orifices Per Unit 3
Range 4/64
in to 12/64 in
Rating Collapse 6,000
psi | 414 Bar
Burst 10,000
psi | 689 Bar
Temperature 257
deg F | 125 Deg C
Construction Metallurgy UNS N07718 Inc 718 | UNS S20910 | XM-19
Nitronic 50HS
Critical Seals Electron Beam Welded | Metal-to-metal |
Termination Metal-to-metal | Field testable
Communication & Control TEC ¼" Tubing Encapsulated Conductor |
3 Conductor
Unit Count Max 16 DIAL units per system | Depth
Range Max deployable depth=30,000 ft | 9,150
m | Unit count dependent
Monitoring Sample Rate 1 sample every minute |
6 per minute for brief monitoring events
Accuracy +/- 0.15% FS (10 ksi)
Note: JFEBEAR™ is a trademark of JFE Steel Corporation.

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Want to learn how DIAL can optimize your gas lifted wells?