The Negro and Madeira Rivers feed into the Amazon.
Ninety percent this answer is too short so I am just typing this
Answer:
Option C. Is used to cool the drill bit and to flush rock cuttings up and out of the drill hole
Explanation:
Drill mud plays a vital role in the drilling process. Its addition into the well-bore does a lot in enhancing the drilling processes and activities.
Among other importance and function of the drill mud /fluid:
1. It is used to cool off the drill bit
2. It flushes rock cuttings out of the drill hole
3. High pressure control
4. Providing buoyancy
5. Lubrication
Steps which must be taken to improve environmental quality in Eastern Europe are:
Data collection, enforcement, and international policy development
Hope this helps!!!
