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7. If three joints comprise a stand, and that is the usual case, then the stand is
sometimes called a "…".
a) dribble;

b) thribble
c) triple
d) b and c are correct.

8. In a few cases, crew members may pull four-joint stands; in such a case, they
pull "…," or "fourbles."
a) quadrules;

b) iron table;
c) square casing;

d) no correct answer.

9. Because the surface hole is usually relatively … , it does not take crew
members very long to get all the drill stem and bit out of the hole.

a) hollow;
b) shallow;
c) deep;

d) no correct answer.

10. Surface casing is usually … in diameter — perhaps 20 inches (508

millimetres).
a) small;
b) tiny;

c) large;
d) no correct answer.

11. Cement bonds the casing to the hole and prevents … in one formation from

migrating to another.
a) gas;
b) oil;

c) fluids;
d) minerals.

12. The company mixes the dry cement with … to form a slurry — a thin, watery
mixture that is easy to pump.
a) mud;

b) water;

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