Cement Head

Question 1

On a standard primary cement job, if the top plug fails to bump, what would you recommend to the customer (choose 2 answers below)?

Answer 1

1. After agreement with the customer, pump an additional volume equal to half the shoe track volume, and then stop pumping.
2. If the plug still does not bump, stop pumping and check returns.

Question 2

What should you do if the plug you are installing is too large for the cement head you are using?

Answer 2

3. Notify the Job Supervisor (SS/FE) and let him find a correct alternate plug or decide not to drop the plug.

Question 3

Why are wells cemented?

Answer 3

1. Provide complete isolation of zones (Hydraulic Bond)
2. To support the casing (Shear Bond)
3. Protect casing string.

Question 4

When you get the cement head to location you find that the O ring is damaged on the top cap, what should you do?

Answer 4

2. Replace the O-ring with the correct O-ring.

Question 5

After dropping the bottom plug, you begin to pump the slurry but at the same time the area around the lower pin puller begins to leak, how would fix the leak without causing significant amounts of lost time?

Answer 5

3. Screw the pin back in. Making sure the plug was dropped (indicated by the tattle tale) first.

Question 6

Both you and the customer notice a pressure spike upon releasing the bottom plug, what might this be attributed to (please choose 2 answers)?

Answer 6

4. Possible small amount of dried cement in the valve you just opened.
5. The pin did not retract all the way - you just burst the bottom plug diaphragm.

Question 7

If the tattle tail does not indicate that the plug has departed from the head, what is the first action you should take?

Answer 7

2. Inform the client of the problem.

Question 8

If either of the pin pullers are too stiff to move when you try to launch the wiper plugs, what would be your first action to solve the problem?

Answer 8

1. Remove the head and place the plugs in the casing (as needed), either replace the head or circulating swedge and finish displacing.

Question 9

Identify the features of a bottom cement (wiper) plug. Select the right answer.

Answer 9

1. Constructed with a hollow core covered with a thin membrane.
2. Cleans casing wall.
3. Seat for landing top plugs.
4. Pressure is used to rupture the diaphragm.

Question 10

After the top plug is in the wellbore, which valves are opened to allow the displacement fluid to clear the cement residue from all internal lines in the cement head? Select all the correct answers.

Answer 10

4. Bottom plug valve and middle plug valve.

Question 11

Select the sentence that best describes the cementing process:

Answer 11

1. When casing is run, cement is used to fill the space between the casing and OH/previous casing.

Question 12

Fabricated cement heads can withstand up to _______ depending on the size of the head, and the integral heads can be used up to _________ depending on the size of the head respectively.

Answer 12

1. 5000 psi, 10000 psi

Question 13

Why does the single-plug cement head represent a higher risk to the operator than the double-plug cement head? Select all the correct answers.

Answer 13

2. Because the top cap has to be removed to load the top plug.
3. Because the loading of the top plug may occur high above the rig floor.

Question 14

The larger the internal diameter of the cement head, the ___________ the approved pressure rating.

Answer 14

1. Lower

Question 15

The customer makes a change to the drilling program, the pressure test after the job now goes beyond the pressure rating of the head, the best plan of action would be what?

Answer 15

3. Remove the cement head, install the circulating swedge, continue with the pressure test.

Question 16

The pressure rating of a cement head should always be checked after pressuring up the system.

Answer 16

b. False must be before