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Question: 1 as illustrated in class what are the three most...

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1. As illustrated in class what are the three most common mechanical subcomponents (located immediately under the drilling floor) of a drilling rig’s secondary pressure control system that act to seal off the wellbore? Briefly describe how each of them operates to seal off the wellbore.

2. Briefly describe the process of ‘mud logging’ on a drilling rig.

3. What are shale shaker screens used for and which primary wellsite personal rely on them for critical formation evaluation data? These wellsite personal describe what three important features of the formations encountered?

4. During the drilling of a wellbore a fractured and vuggy (large holes) formation is encountered. What worst case scenario may happen that could put the lives of the rig crew and the public at risk? What kind of materials do the drilling crew add to the mud to try to stop the fluid losses? What would happen if the mud column in the wellbore dropped significantly?

5. Describe three features of oil based drilling mud systems. Which kind of Resistivity logs perform best in this mud system?

6. Describe three features of salt water based drilling mud systems. Which kind of Resistivity logs perform best in this mud system?

7. Describe three features of fresh water based drilling mud systems. Which kind of Resistivity logs perform best in this mud system?

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