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a) they are used on the top of the string to put weight on the bit;
b) they are used in the bottom part of the drawworks to put weight on the bit;
c) they are used on the top of the string to put weight on the drill pipe;
d) they are used in the bottom part of the string to put weight on the bit;

28. What is the length of the drill pipe?
a) about30 feet;
b) about10 feet;
c) about20 feet;
d) about 50 feet.

29) What are the main types of bits?
a) stable cone and fixed head;
b) roller cone and down head;
c) roller cone and fixed head;
d) stable cone and fixed hand.

30) What is a drilling fluid?
a) a mixture of oil, clay, weighting material, and a few chemicals;
b) a mixture of water, clay, weighting material, and a few chemicals;
c) a mixture of water, gas, weighting material, and a few chemicals;
d) a mixture of water, clay, rolling material, and a few chemicals.

Unit 9

Normal drilling operations
Answer the following questions.

1. What do you know about drilling operations?
2. Is drilling on the surface hole possible?
3. What are normal drilling operations?
4. What is the role of kelly during drilling?
5. What does the weight indicator show?
6. What function does the travelling block perform?
7. Who is the derrickman?
8. What function does the intermediate casing perform?
9. Who is the operator?
10. What is the intermediate liner?

Choose the correct answer.

1. The driller uses a built-in … in the top drive to spin up the joint and torque it to

final tightness.
a) wrench;
b) rig;

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