Injecting water into the air stream during drilling has what effect in rock formations?

• A. Heats the bit and increases dust
• B. Cools the bit, reduces dust, and helps remove cuttings
• C. Has no effect on cutting removal
• D. Causes corrosion of equipment

Answer: (B)

Injecting water into the air stream provides three key benefits during drilling. It cools the bit by absorbing heat from cutting and rock, helping to prevent overheating and extend bit life. It also suppresses dust because the moisture binds fine particles, keeping them from becoming airborne and improving visibility and safety. Additionally, the water helps remove cuttings by wetting them and increasing their tendency to be carried up with the air, forming a more movable slurry that rides in the gas stream toward the surface. So, water injection cools the bit, reduces dust, and aids in moving cuttings out of the hole.