Which of the following is a disadvantage of air rotary drilling related to pressure control?

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Multiple Choice

Which of the following is a disadvantage of air rotary drilling related to pressure control?

Explanation:
Air rotary drilling uses air as the circulating medium, which provides very little hydrostatic pressure to counter formation gas or fluids. Because there isn’t a dense drilling mud column to help balance pore pressure, any influx or kick can escalate quickly into an uncontrolled flow—a blowout. The lack of a heavy fluid barrier makes pressure control more fragile, so blowouts are a real, higher-risk disadvantage in air drilling. The other options describe aspects unrelated to how pressure is managed during drilling.

Air rotary drilling uses air as the circulating medium, which provides very little hydrostatic pressure to counter formation gas or fluids. Because there isn’t a dense drilling mud column to help balance pore pressure, any influx or kick can escalate quickly into an uncontrolled flow—a blowout. The lack of a heavy fluid barrier makes pressure control more fragile, so blowouts are a real, higher-risk disadvantage in air drilling. The other options describe aspects unrelated to how pressure is managed during drilling.

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