MWD Overview - Meeting 41

MWD Objective

• Get downhole Inclination, Azimuth, Toolface and Data Quality to Directional Driller as quickly as possible.

Talking Points

• Analogue Sensors
• Real Raw Data
• Raw Data
• Calculations
• Surface Setup
• Minimum Survey
  • Inclination
  • Azimuth
  • Toolface
  • Data Quality Flag
• Long Survey
  • Ax
  • Ay
  • Az
  • Bx
  • By
  • Bz
• Encoding and Transmission
• Receiving and Decoding
• Display
• Downhole Memory
• Basic Issues
  • Default Quality Limits – Often very large +/-5000 nt on B Total and +/=5 degrees on Dip
  • Fail ‘good’ surveys
  • Pass ‘bad’ surveys
  • Hardware modified (Frankentools) [Sensors, Electronics, Power Supply]
  • Hardware and firmware limited

....

View the entire Presentation:

MWD Overview

Steve Grindrod

  

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