i-Con Monitoring Sub

The i-Con is a robust, memory-based monitoring sub for gathering and understanding dynamic data recorded during well operations.


A robust tool for gathering and understanding dynamic data recorded during well operations, the i-Con™ is a compact, memory-based monitoring sub equipped with an electronics package consisting of sensors, batteries, and memory for use in coiled tubing and drill pipe operations. Traditionally, the gathering of precise mechanical downhole dynamic data has been limited to the use of measurement-while-drilling (MWD) tools during drilling operations. In most well operations in the completion and intervention phase, the same downhole data would provide valuable input for operational verification, information, and diagnostics. The i-Con has drill pipe connections and a full-bore inside diameter (ID) to ensure seamless integration into most work string setups. The intelligent sub records tension, compression, torque, temperature, pressure, vibrations, and acceleration where it matters—downhole. Once the i-Con has been retrieved from the hole, the data can be downloaded from the easily available data port. Downhole data can then be investigated and compared with surface measurements to provide improved understanding and learning.

SPE papers:


  • Full bore and short length
  • Configurable sampling rates
  • Cost effective
  • No surface rig-up required


  • No flow restrictions and minimum interference with operations
  • Low risk
  • Possible to fine-tune data quality or extend logging period
  • Suitable as surveillance device in most operations
  • Limited footprint


  • Installation of liner and lower completions
  • Torque and drag model verification
  • Fishing operations
  • Plug setting and retrieval
  • Shifting tool operations
  • Cleanout operations
  • Other critical drill pipe interventions
  • Slot recovery operations
  • Plug and abandon operations

Technical Data

 i-Con Length, in. (m)   OD, in. (mm)  ID, in. (mm) Tensile, k lbf (tonne)  Pressure1, psi (bar)   Torque, lb ft (N m)  Threads
 L  88.43 (2.246)  5.750 (146.05)  2.250 (57.15)  422.0 (191.4)  15,000 (1,034)  26,000 (32,250) Top: XT39 Box
Bottom: XT39 Pin
 XL2  121.10 (3.075)  7.6 (193)  3.000 (76.20)  844.0 (382.8)  19,400 (1,337)  79,210 (107,400) Top: XT57 Box
Bottom: XT57 Pin

1 For combined loading working envelope contact Completion Tools
2 Additional configurations available upon request, consult Engineering

Measuring Range

 i-Con  Tensile, k lbf (tonne)  Compression, k lbf (tonne) Pressure, psi (bar)  Temperature, °F (°C)  Torque, lb ft (N m) 
 L  150.0 (68.0)  150.0 (68.0)  15,000 (1,034)  266 (130)  15,000 (20,300)
 XL  217.7 (480.0)  480.0 (217.7)  19,400 (1,337)  266 (130)  60,000 (81,350)

  • i-Con Monitoring Sub Spec Sheet

  • i-Con Drill Pipe Logging Tool Case Study

  • i-Con for Top Drive Torque Calibration and Verification Case Study

  • i-Con Logging Tool Case Study

  • OTC Show Daily May 2017 - Transforming liner installation performance

Angled render of a i-Con Monitoring Sub on a white background

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