Across
- 4. a sticky, heavy soil
- 6. drilling fluid used in the circulation system
- 7. substance used to reduce thickness of mud
- 8. chemicals added to drilling fluids
- 9. the thickness of drilling fluid
- 10. ability of mud to lubricate drill equipment
Down
- 1. drilling fluids containing oil
- 2. poisonous substances
- 3. holes in the drill bit
- 5. machine used to seperate cuttings from mud
- 6. storage area for mud