Page 125 - Petroleum and Gas Field Processing

REVIEW QUESTIONS AND EXERCISE PROBLEMS

1. What is the purpose of each of the following internal components of a
separator?
(a) Inlet diverter
(b) Mist extractor
(c) Vortex breaker
(d) Wave breaker
2. What are the forces acting on a liquid droplet in the gravity settling
section of a separator?
3. What is the significance of retention time in separator design?
4. Complete the following statements:
(a) In the gravity settling of a gas–oil separator, oil droplets down
to a size of should be removed in order to
prevent
(b) In a gas scrubber, removal of 500-mm droplets in the gravity
settling section is sufficient because
5. Which type of separator (vertical or horizontal) is more suitable for
the following cases (justify your selection):
(a) Handling solids in the fluid
(b) Handling large volumes of gas
(c) Handling liquid surges
(d) Offshore operations
6. State whether each of the following statements is true (T) or false (F):

(a) Carryover is the escape of free liquid with the gas due to vortexes.
(b) In, the separator design, unless laboratory data are available,
the smallest water droplet size that should be removed from oil
is taken as 100 mm.
(c) Blowby is the escape of free gas with the liquid that may result
from excessive foaming.
(d) In long horizontal separators, waves may develop at the
interface. This results in level control problems, which could be
eliminated by the installation of coalescing plates.
7. Circle the correct answers (note that more than one answer could be
correct):

I. Foamy crude oil may result in
(a) Improper gas–oil interface level control

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