This paper compliments the potential use of aerated fluid drilling in oil-gas operation of which the techniques in application was further extended to geothermal energy drilling.

Compared with the use of conventional mud in both oil-gas and geothermal drilling operation, the benefits of aerated fluid cannot be denied. However, the developed utilization of blind drilling in geothermal operation in Luzon, Philippines were observed to be more beneficial.

This paper highlights the incremental costs involved in using aerated fluid compared with blind drilling with water in geothermal operation within the 8½" hole interval when total lost circulation zones are encountered.

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