Underbalanced Drilling


This presentation covers the underbalanced drilling method, which is defined as the practice of drilling a well with the wellbore fluid gradient less than the natural formation gradient. Besides minimizing lost circulation and increasing the penetration rate, this technique has a widely recognized benefit of minimizing the damage caused by invasion of drilling fluid into the formation. Different underbalanced drilling equipment and techniques are discussed under this topic. The underbalanced well classification system used by the industry and several case studies are also covered in this presentation.

Duration:  4 hours, 20 minutes


  • Introduction to Underbalanced Drilling
  • Dry Air Drilling
  • Nitrogen Drilling
  • Natural Gas Drilling
  • Mist Drilling
  • Foam Drilling
  • Stiff Foam Drilling
  • Gasified Liquids
  • Flow-Drilling
  • Snub Drilling
  • Underbalanced Drilling: General Issues
  • Case Studies
  • Underbalanced Drilling: References and Additional Information

This online training course is categorized under the Drilling discipline.

0.43 CEUs offered.

Members : USD 115.00

Non-members : USD 150.00


Underbalanced Drilling
Begin self-paced component package.
Begin self-paced component package. This course will take 260 minutes, and will expire 365 days after purchase.
0.43 CEUs credits  |  Certificate available
0.43 CEUs credits  |  Certificate available CEUs offered.