Casing Hardware

Question 1

what is a casing hardware?

Answer 1

Casing hardware consists of all the devices attached to the casing

Question 2

Mention the different types of casing hardware

Answer 2

• Shoes
  
  • Collars
  • Baskets
  • Centralizers
  • Scratchers
  • Plugs.

Question 3

Why are the shoes attached to the bottom end of the casing?

Answer 3

to make easier to run the casing into its final planned depth.

Question 4

What are the three types of shoes?

Answer 4

Guide shoes.
Float Shoes
Stab-in shoes.

Question 5

What are the 2 types of material that the guide shoes are made?

Answer 5

The aluminum guide shoe is most often used with liners, or where ease of drilling out is a prime concern.

Cement-filled guide shoes have the advantage of being more resistant to impact.

Question 6

What is the difference between float shoes and guide shoes?

Answer 6

Float shoes have all of the advantages of a guide shoe, but also provide the additional advantage of a check valve to prevent flow back.

Question 7

what are the three types of float shoes?

Answer 7

• Flapper type
  
  • Ball type
  • Dart type.

Question 8

What is the stab-in method of cementing?

Answer 8

the cement and other fluids are injected through the drillpipe, rather than through the casing.

Question 9

What is the principal advantage of the stab-in method of cementing?

Answer 9

Since the inside diameter (ID) of the drillpipe is so much smaller than the inside diameter of the casing, the amount and cost of materials is reduced considerably.

Question 10

is the pumping time reduced in a stab-in cementing method?

Answer 10

true displacement volumes are greatly reduced, so the pumping time is greatly reduced.

Question 11

Is the contamination of the cement reduced in the stab in cementing method?

Answer 11

true, since the cement is less exposed to mud in the casing, contamination of the cement is greatly reduced

Question 12

what is the reason for performing a multi-stage cementing?

Answer 12

To reduce the possibility of breaking down a weak formation

Question 13

what are the four types of collars?

Answer 13

• Float collars
• Stab-in collars
• Stage collars.
• Landing collar (without a valve)

Question 14

what is the function of a scratcher?

Answer 14

To aid in the removal of drilling fluid filter cake.

Question 15

what is the minimum standoff recommended by slb?

Answer 15

75%

Question 16

What are functions of plugs?

Answer 16

To separate various fluids
To aid in the removal of drilling fluid filter cake
To wipe the walls of the casing to aid in mud removal.

Question 17

what is the function of cementing basket?

Answer 17

To force cement up the annulus and not allow it to fall down into the well bore

Question 18

what is the function of a centralizer?

Answer 18

to improve the standoff between the pipe and previous casing, or the open hole.

Question 19

which plug has a rubber diaphragm that is soft to the touch?

Answer 19

The bottom plug

Question 20

where are placed the baskets?

Answer 20

just below the stage collar, or above any point where a weak formation is a concern

Question 21

What are the types of centralizers?

Answer 21

Bow type (Flexible)
Rigid type (rigid)

Question 22

What is used in conjunction with centralizers or other casing hardware to limit the amount of allowable vertical travel along the pipe. ?

Answer 22

stop collars