Crossword Challenge: Specialized Drilling Fluids and Inhibited Systems

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Across
  1. 4. A drilling mud that uses calcium hydroxide to inhibit shale hydration.
  2. 6. A drilling mud in which oil is dispersed in water.
  3. 8. Fine-grained sedimentary rock composed mainly of clay minerals that often causes drilling problems.
  4. 9. The hole created during drilling that must remain stable.
  5. 10. A drilling mud commonly used in salt formations and salt domes.
Down
  1. 1. A specialized drilling mud containing calcium sulfate.
  2. 2. A drilling mud that uses sodium silicate to stabilize reactive shales.
  3. 3. The process by which shale absorbs water and swells.
  4. 5. The process of reducing shale hydration and swelling.
  5. 7. A drilling mud that uses oil as the continuous phase instead of water.