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ALT > API Assessment > Flashcards

API Assessment Flashcards

1
Q

True or False. Back pressure must always be applied when using the stirred fluid loss apparatus.

A

False

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2
Q

API compressive strength is determined from _____________.

A

2” x 2” cubes prepared as per API RP 10B-2

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3
Q

The temperature in the UCA should be programmed ______________.

A

With a schedule that stimulates the well heat up during shut-in.

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4
Q

What is the recommended paddle speed and its maximum tolerance?

A

150 rpm +/- 15 rpm

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5
Q

Additional conditioning is optional except for what test?

A

Downhole rheology

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6
Q

If the BHCT of a slurry is 212 degF, the fluid loss test is _______________.

A

Conditioned on the stirred fluid loss cell at 212 degF and test is ran at 212 degF.

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7
Q

What information is written on the worksheet after mixing?

A

Water and cement temperature, time to add the dry components, and the speed under load at high shear.

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8
Q

We use a pressurized mud balance in the lab to check density because _________________.

A

If not pressurized, the slurry will read at a lower density due to air bubbles.

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9
Q

The sedimentation tube is normally __________.

A

100-200 mm.

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10
Q

When performing a free fluid test where downhole conditions are 250 degF and 8000 psi, the free fluid tube can be placed into a pressurized consistometer at 190 degF and brought to BHCT and what API specified pressure?

A

Minimum pressure to keep water vapor from forming according to table 4 of API RP 10B-2.

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11
Q

What is the mesh for a fluid loss cell?

A

325 x 60

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12
Q

True or False. The stirred fluid loss conditions the slurry within the unit without having to condition in a consistometer and pouring into a fluid loss cell. Because conditioning is done on the unit, API stipulates that the slurry be conditioned an additional standard 20 minutes to allow the thermocouple to accurately gauge the internal temp of the cell and to level off.

A

False

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13
Q 
Match the calibration item for a pressurized consistometer with its calibration frequency.
Temperature Measuring System
Motor Speed
Timer
Pressure Gauges
A

Temperature Measuring System - Monthly
Motor Speed - Quarterly
Timer - Twice per year
Pressure Gauges - Annually

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14
Q

What is the required accuracy of the balance scale when used for API preparations of dryblend and mixfluid?

A

0.1% of indicated load.

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15
Q

If conditioning temperature is above _____ degrees, a pressurized vessel must be used.

A

190 degF

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16
Q

What are 2 items not required to attain a good calibration on a pressurized mud balance?

A
  1. Manufacturer of balance

2. No cement build up around outside of plunger.

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17
Q

If the field mixing temperature is unknown, API recommends slurries be mixed at ____ +/- ____ degrees in the lab.

A

73 degF +/- 3 degF

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18
Q

What one thing is not necessary to inspect on a UCA cell before loading the cell?

A

Clean outer appearance of cell.

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19
Q

What is the conditioning pressure in a stirred fluid loss cell?

A

500 +/- 50 psi

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20
Q

How long do you have to add the slurry to the atmospheric conditioning cell after mixing?

A

1 minute

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21
Q

After the cement slurry is conditioned, the slurry is ________ before testing is commenced.

A

Stirred briskly with a spatula in order to re-suspend the solids.

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22
Q

When should you begin data acquisition in UCA?

A

5 minutes after application of temperature and pressure.

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23
Q

The maximum temperature cubes can be cured in a water bath is ________.

A

150 degF

24
Q

The UCA cell has a top and bottom end. The purpose is to _________________.

A

To make the inside of the cell tapered, so it is easier to remove cement.

25
Q

How would you remove oil from a pressurized slurry cup after conditioning?

A

Remove with a syringe and towel.

26
Q

When conditioning a slurry in a stirred fluid loss cell, the motor is located on the ____________.

A

Bottom

27
Q

How often should you calibrate the mixer blade speed?

A

Quarterly

28
Q

According to API specs, how many seconds should elapse between each rheology reading?

A

10 seconds

29
Q

What is the calibration frequency for a digital weigh balance/scale?

A

12 months

30
Q

The advantage of stirred fluid loss:

A

The slurry is conditioned in the fluid loss cell, minimizing handling of the hot fluids and making the test easier to accomplish and safer.

31
Q

You have performed a destructive test and have measured a break force of 10,000 lbs on a cube sample with a 1”x1” cube face. What is the compressive strength?

A

10,000 psi

32
Q

While collecting fluid from a stirred fluid loss test, you hear the slurry might’ve blown dry at 12 minutes, but failed to measure the collected amount until 15 minutes. At 10 minutes the fluid collected was 20ml, at 15 minutes the condenser collected 5 more ml and did in fact blow dry. What amount of fluid collected is used in determining the API fluid loss calculation?

A

20 ml at 10 minutes

33
Q

When should you begin the cooling period prior to performing destructive test?

A

45 minutes

34
Q

After pouring slurry into sedimentation tube you should ______________.

A

Puddle the slurry to remove air.

35
Q

The pressure to be placed on the back pressure receiver is __________.

A

Sufficient pressure as to prevent boiling from table in API RP10B-2

36
Q

To remove air from your slurry before loading it for thickening time test, you must ____________.

A
  1. Fill the slurry to the threads, so that when you seal the cup, air will leave the cup with the excess slurry through the opening.
  2. Pour the slurry along the side of the cup to reduce the amount of air trapped in the cup.
  3. Tap the side of the cup until the bubbles stop rising to the surface.
37
Q

True or False. When performing the API sedimentation test, you allow the set cement core to cool on a table and not in an ambient water bath. You then measure the mass and mass displacement in water of each cut core and calculate the densities. The density measurements show no trend in settling. Should cooling the core in air instead of water void any results taken if the density shows no indication of settling?

A

True

38
Q

When can both atmospheric and pressurized consistometers be used for conditioning?

A

When the BHCT is below 190 degF

39
Q

On the fluid loss test, filtrate volume is recorded every ______________.

A

At 1, 2, 5, 7.5, 10, 15, 20, 25, and 30 minutes.

40
Q

Free fluid is the fluid that ____________.

A

After 2 hours.

41
Q

Ultrasonic compressive strength is a correlation determined from ___________.

A

Cubes

42
Q 
Match the API recommended practice/specification with its description/purpose.
API RP 10B-6
API RP 10B-5
API RP 10B-4
API RP 10B-2
API Spec 10A
API RP 10B-3
A 
API RP 10B-6 / Gel Strength
API RP 10B-5 / Shrinkage & Expansion
API RP 10B-4 / Foam Cement
API RP 10B-2 / Well Cement (Land)
API Spec 10A / Manufacturer
API RP 10B-3 / Deep Well (Offshore)
43
Q

What are the tests that require conditioning?

A
  1. Downhole rheology
  2. Fluid loss
  3. Static gel strength
44
Q

Match the calibration item with its frequency.
Motor speed
Pressure gauges
Temperature controller

A

Motor speed - Quarterly
Pressure gauges - 12 months
Temperature controller - Monthly

45
Q

When do you need to start the 5270 testing software for the thickening time test?

A

5 minutes after mixing.

46
Q

For cubes that are 500 psi CS, the hydraulic press load rate should be _____________.

A

500 psi +/- 50 psi

47
Q

Which tests are considered to be a dynamic test of slurry rather than a static test of slurry?

A

Thickening time & stirred fluid loss.

48
Q

If there is a batch mix schedule for the thickening time test, this schedule is ____________.

A

Subtracted from the pump time and then reported.

49
Q

Match the calibration item with its calibration frequency.
Balance
Timer
Potentiometer

A

Balance - 12 months
Timer - 6 months
Potentiometer - Monthly (new API is quarterly)

50
Q

Slurries are to be mixed with a blade that has no more than _______ % weight loss.

A

10%

51
Q

What is the equation for API fluid loss when it blows dry?

A

2V x the square root of 30 divided by the square root of time.

52
Q

The length from the interior of the graduated cylinder to the 250 mL mark should be from ___________.

A

232 - 250 mm

53
Q

The tube containing the slurry is placed in the chamber and ______________________.

A

sufficient pressure is applied in order to keep sample from boiling.

54
Q

For cubes stronger than 500 psi, the load rate should be ____________.

A

4,000 psi/min

55
Q

The sedimentation test is used ______________.

A

to demonstrate the ability of the cement to maintain its components in a uniform suspension.

56
Q

Name three tests required for API 10A Class H Cement.

A
  1. Thickening time
  2. Free fluid
  3. Destructive compressive strength
57
Q

What items are required to perform a fluid loss test?

A

Wrench
Back pressure receiver
Stop watch
Graduated Cylinder

ALT (3 decks)

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