Module 7 - Cement

Question 1

Portland cement

Answer 1

made from limestone with high clay content

mainly used in cementing in the oilfield

Question 2

Natural Cement

Answer 2

uses silicon, aluminum and calcium compounds

Question 3

Main difference between Portland and natural cement

Answer 3

the raw materials used for each is different

Question 4

What class of cement is most commonly used in the oilfield

Answer 4

class G cement is the most common

Question 5

in HTHP which class of cement would you use

Answer 5

J

Question 6

For casing surface hole in normal requirements, what are your options

Answer 6

A or G

Question 7

Physical properties of Slurry

Answer 7

Specific Gravity
Absolute and bulk volumes
Slurry density and yield
Thickening time

Question 8

What is the curing temperature does the compressive strength of cement occur

Answer 8

93 degrees celcius

Question 9

what is the range of specific gravity of Portland cement

Answer 9

3.10 to 3.25

Question 10

Cementing tools

Answer 10

Casing shoe
Float collar and plugs
Top and bottom plugs
Centralizer
Scratchers

Question 11

What role do scratchers play in cementing

Answer 11

help clean the hole of mud cake so a better bond with the formation may be had

Question 12

which plug has a hollow center

Answer 12

the bottom plug

Question 13

what prevents the cement from going back in the casing once it is pumped out of the float shoe

Answer 13

the float collar because of it’s back flow valve