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19.

Which of the following is NOT an API classification for oil well pumps?

A.    Tubing type with extension shoe and nipple

B.    Tubing type, traveling barrel with bottom hold-down

C.    Rod type, stationary barrel with top hold-down

D.    Rod type, traveling barrel

20.

Which of the following has the LEAST volumetric efficiency for rod pumped wells?

A.    High fluid level with no gas interference

B.    Gaseous wells with fair downhole separation

C.    Foamy liąuid or gaseous conditions

D.    Ample pump submergence with good separation

21.

A caliper survey has been run on a producing gas well. It shows that the casing is partially collapsed 500 ft (152.4 m) above the perforations. The well is starting to load up with fluid, so a decision has been madę to install a smali diameter tubing string with a packer set just below the partially collapsed interval to protect the casing from pressure, temperaturę fluctuations and other forces that could result in further collapse.

What type of packer should be used in this application?

A.    Weight-set packer

B.    Tension-set packer

C.    Rotation-set packer

D.    Hydraulic-set packer