Across
- 4. where a drill is placed
- 5. a deep, narrow hole
- 7. aaa
- 11. aaa
- 13. to examine
- 14. A heavy, thick-walled tube, usually steel, used between the drill pipe and the bit in the drill stem used to stiffen the drilling assembly and put weight on the bit (WOB)
- 15. material that a core bit is made of
Down
- 1. a type of drilling
- 2. The column of a core rig
- 3. aaaa
- 6. hard or protective hat
- 8. a device with a spinning disc
- 9. determine the content or quality of an ore
- 10. aaa
- 12. The borehole drilled first