Primary Cementing

Select two correct statements regarding production casing/liners
Protects fresh water formation from contamination
Houses completion equipment when/if needed
Isolates the payzone from other formations
Provide a competent mechanical base for subsequent operations (BOP, casings, etc)
What is the type of this cement head?
DeepSea Expres Cement Head
Double plug cement head
Single plug cement head
Bottom and Top plugs are differentiated by their colors
True
False
Which image illustrate a float shoe ?
A
B
C
What are the main advantages of stab-in cementing/Inner string?
Reduces casing costs
Small displacement volumes
Reduces cement contamination inside the casing
Avoids formation breakdown
Reduce the concentration requirements of some additives like retarders
Avoids cement channeling into the annulus
Why is it recommended to slow down the pumping rate during last few barrels of displacement
Color of handle
Because it is a Schlumberger standard
To decrease friction pressure in the pipe
To be able to stop at the accurate time when the top plug is bumped in order to prevent an uncontrolled increase of pressure
Because that is one of client's standards
Which of the following is NOT an API Casing Specification used to describe a pipe?
Burst and Collapse Pressure
Thread Type
Grade
Join length (40 ft)
Outside diameter (OD)
Weight (lb/ft)
Which of the following threads is NOT a common casing string thread
Buttress
Hydril
ACME
VAM
8Round
What is the purpose of production casing/liners in oil and gas wells?
To provide structural support to the wellbore
To isolate different formations
To control fluid flow
To prevent blowouts
Which type of cement head is commonly used for primary cementing operations?
Batch mix cement head
Continuous mix cement head
Double plug cement head
Reverse cement head
What are the main advantages of stab-in cementing or inner string cementing?
Reduced risk of fluid losses
Improved zonal isolation
Faster cement placement
Enhanced wellbore stability
What is the purpose of centralizers in cementing operations?
To center the casing/liner in the wellbore
To provide additional support to the casing/liner
To prevent fluid migration during cementing
To create a seal between different formations
Which type of cement plug is commonly used for temporary abandonment of wells?
Balanced plug
Squeeze plug
Top plug
Bottom plug
Which of the following is NOT a function of float shoes in cementing operations?
Provide buoyancy to the casing string
Prevent backflow of cement during displacement
Guide the casing string during insertion
Create a seal between different formations
Facilitate casing rotation during installation
What is the recommended minimum overlap length for casing centralizers?
75% of the centralizer length
50% of the centralizer length
100% of the centralizer length
25% of the centralizer length
Which of the following is NOT a benefit of using stage cementing collars?
Allows for selective placement of cement in different zones
Reduces the risk of lost circulation during cementing
Enables controlled release of pressure during cementing
Improves casing centralization
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