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

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?

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

Primary Cementing

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