Computer Torque


WinCatt™ is a software tool which interacts with external control hardware to provide real time monitoring and control of tubular connection power tong make-up. The graphical user interface and logical software structure combined with powerful control, data acquisition and presentation capabilities enable the user to easily specify make-up parameters, control the make-up process and evaluate quality.

WinCatt™ was developed with an emphasis on the user’s needs for reliability, accuracy, and ease of use. Key features are:

Function

  • monitors torque, turns, and rotational speed during make-up
  • controls speed during make-up (optional)
  • controls based on either final torque or final turns
  • includes calibration management system
  • includes automatic “Start Recording” & “Dump Valve Release”
  • includes automatic descriptive comments with optional over-ride
  • available with optional pressure test system

Analysis

  • analyzes make-up to determine: conformance to manufacturer’s specification shouldering point for premium connections shouldering time, delta torque, delta turns
  • reviews results from previous make-ups

Safety

  • limit torque to user specifies maximum during idle time

Reporting

  • job description
  • summary reports of make-up results
  • statistical analysis
  • real time or post job make-up plots

Technical Specifications

Sampling Frequency: User defined from 1 – 8000 Hz
500 Hz recommended
Recording Frequency: Based on combination of delta torque and user defined delta time
Calibration Management: Choice of calculated calibration based on load cell manufacturer specifications or local calibration based on user force standard. Shunt calibration with automatic “drift” tracking
Response time: Electronics < .5 ms
Hydraulics – dependent on dump valve – typically 10 – 30 ms
Final torque: Average = optimum torque +/- 1%
Standard deviation < 2% under normal operating conditions
Operating temperature: Computer, 5 – 50oC (40 – 122oF)
Junction box, minus 30 – 80oC (minus 22 -180oF)
Torque accuracy: max error (% of full scale) = sqrt[Local force standard error2 + arm length error2 + 0.152]
Typically less than 1%.
Turns accuracy: max error = +/-one pulse of turns counter
Pressure accuracy: max error (% of F.S.) = sqrt[pressure standard error2 + 0.152] Typically less than 1%.

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