
What is Air and Nitrogen Injection?
An Air or Nitrogen Injection application involves injecting air or nitrogen during the underbalanced drilling process.
What is Air and Nitrogen Injection?

Injection
By using an air or nitrogen injection during underbalanced drilling; the reservoir pressure remains low, increasing production by allowing the oil and gas to flow while drilling. In addition, the drilling rate typically increases as an underbalanced condition is approached.
Injection

Drilling Fluid
In conventional drilling, drilling fluid is pumped into the well shaft at high pressures to hold the oil in the reservoir while drilling.
Drilling Fluid

Balance
Excessive overbalance can slow the drilling process by strengthening the near-wellbore rock and limiting removal of drilled cuttings under the bit.
Balance