24. Which valve on a production tree is used for injecting fluids? 25. Is the up

Question

24. Which valve on a production tree is used for injecting fluids? 25. Is the upper master valve in a production tree usually manually or hydraulically operated? 26. What is a gravel pack? 27. What is a perforation? 28. Does a perforation penetrate both the casing and casing cement? 29. What is the relationship between pressure at the wellhead and formation pressure? 30. Given the density of an oil sample, calculate the API gravity of the sample? 31. Where are the greatest pressure drops in a producing well? 32. What is the difference between a production tee and blowout preventer? 33. If the pressure drop between the reservoir and bottom hole pressure is maintained, what happens to the flow rate if reservoir permeability decreases? 4. How do the downhole valves in a pumpjack sucker rod system operate?

Explanation / Answer

Answer:

26.What is a gravel pack?

A gravel pack is simply a downhole filter designed to prevent the production of unwanted formation sand. The formation sand is held in place by properly sizedgravel pack sand that, in turn, is held in place with a properly-sized screen.

27.What is a perforation?

Ans: The perforation act process of perforating.

         A hole or pattern made by or as if by piercing or boring…

          One of the series of holes (as between rows of postage stamps)in a sheet that serve as an aid in             separation……

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