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Drilling Final Exam Questions With Answers

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Exam (elaborations)

Drilling Final Exam Questions With Answers

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27 pages

2025/2026

Institution NGWA - General Drilling

Course NGWA - General Drilling

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Drilling Final Exam Questions With Answers

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Dr illin g /

Fin al Exam Question s W ith An sw er s
/ // // // // //

The purpose of using a pre-
// // // // //

flush in cementing operations is ___________________
// // // // //

a. Accelerate the setting time.
// // // //

b. Remove some of the wall cake.
// // // // // //

c. /

Provide a spacer between the drilling mud and the slurry.
/ // // // // // // // // //

d. /

Increase
/ /

the
/ /

density of the slurry. - CORRECT ANSWERS(S)✅✅B & C
/ // // // // // // // //

The best temperature range for slurry is _____________
// // // // // // //

a. Below 60oF to prevent water loss from evaporation.
// // // // // // // //

b. Between 60oF and 90oF as it goes into the well.
// // // // // // // // // //

c. Between 90oF and 100oF as it goes into the well.
// // // // // // // // // //

d. /

Higher
/ /

than
/ /

100oF
/ /

to ensure proper viscosity. - CORRECT ANSWERS(S)✅✅B
/ // // // // // //

,Benefits /

derived
/ /

from
/ /

using
/ //

a /

bottom
/ /

plug in the cementing operation include ____________
/ // // // // // //

a. Wiping mud film from inside the casing.
// // // // // // //

b. Reducing slurry contamination.
// // //

c. Preventing entry of air into slurry.
// // // // // //

d. All of the above - CORRECT ANSWERS(S)✅✅A & B
// // // // // // // // //

Pressure /

should be bled off the casing before ______________
/ // // // // // // //

a. The top plug ruptures.
// // // //

b. The cement sets, so the pipe will not bulge.
// // // // // // // // //

c. The valve in the float collar closes.
// // // // // // //

d. None of the above. - CORRECT ANSWERS(S)✅✅B
// // // // // // //

Which /

of
/ /

the
/ /

following substances can be used as displacement fluid?
/ // // // // // // //

a. Seawater
//

, b. Fresh water
// //

c. Drilling fluid
// //

d. /

All
/ /

of
/ /

the above - CORRECT ANSWERS(S)✅✅d. all of the above
/ // // // // // // // //

In /

determining
/ /

the volume of an open hole with the diameter-
/ // // // // // // // //

squared method, a slightly larger figure for
// // // // // //

diameter should be used to allow for _______________ // // // // // // //

a. Larger casing ID.
// // //

b. Hole enlargement
// //

c. Errors in calculation
// // //

d. /

An
/ /

extra
/ /

amount
/ /

of
/ /

cement
/ /

slurry as a safety factor. - CORRECT ANSWERS(S)✅✅B
/ // // // // // // //

An /

operator
/ /

desiring
/ /

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Uploaded on: February 2, 2026
Number of pages: 27
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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