This website was created by Directional Drilling Challenge OÜ (aka DDChallenge Ltd), which was founded in 2014 as an Estonian private limited company (Osaühing). The company specializes in online training for directional drillers, as well as directional drilling hardware and software to support rig site specialists.
Alexey Pertsev

Alexie Pertsev

CEO & Founder

Alexie graduated from Ufa State Petroleum University in 1982. He spent 13 years working as a research engineer, directional driller (DD), drilling enginer, and programmer in Siberia. Over the next 35+ years, mainly in West Africa with Schlumberger, he returned to DD, gaining extensive experience across regions.
   His solid background provides him with a deep understanding of everything in directional drilling — from tools to software — enabling him to see solutions that make drilling simpler and more efficient.

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Stabilizer Measurement Instructions

  1. Prepare a small 10 ft / 3 m measuring tape.
  3. Wrap the stabilizer tightly with the tape and enter measurements in inches or in mm:
    • Its total overblade circumference:
       + 
    • The thickness of a single blade:
       + 
    • If the measuring tape stabilizer body while wrapping, 
      then the result is directly below:
12
13
16
"
(300mm)

Disclaimer: The nPoint Indicator performs calculations based on well-known and proven mathematical formulas. While the software is designed to produce accurate results based on the input data, DDChallenge Ltd shall not be responsible for any outcomes, decisions, or damages resulting from its use, inaccuracies, or the quality of the input data provided by the user.

By logging into this site, you agree that you have read, understood, and accepted the following:

You are accessing the application for personal or educational purposes only, without any commercial intent. Offline copying or distribution is not permitted unless explicitly authorized by DDChallenge Ltd.

You agree that you have granted a limited, non-exclusive license for personal use only, and you shall not:

  • Modify, adapt, or reverse engineer the application.
  • Use the application in any manner that could damage, disable, or impair its functionality.
  • Share access credentials with third parties.