API Sedimentation Testx - My Committees

savagecowcreekMechanics

Feb 22, 2014 (3 years and 8 months ago)

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1.

Lightly grease in
side of tube and all joints to prevent
leakage

2.

Pour conditioned slurry into tube to ¾ inch from top

3.

Tube shall have inner diameter of
25 ±5 mm (0.98 ±0.02
in.) and be
minimum length of 100 mm (3.
94 in.)
-

most
common length 20
mm (7.9 in.)

4.

Puddle slurry to

remove air an fill tube to top

5.

Top may be closed to prevent spillage (vented)

6.

Place tube in preheated (precooled)
pressurized
consistometer at 350
°F

or T
BHC
if cooler

and at bottomhole
pressure
, in a vertical position

7.

Apply pressure to prevent boiling (ma
y simulate BHP)
avoid

constant pump cycling to minimize vibration

8.

Adjust slurry temperature to simulate temperature changes
in wellbore

9.

Cure for 24 hours or until set

10.

Cool chamber to 190°F, if cured at higher temperature

11.

Release pressure

12.

Remove tube and br
ing to 80° ± 10°F in water bath

13.

When cooled, remove cement from tube (immerse in

water to avoid

drying)

14.

Measure length

15.

Mark ¾ inch from bottom and top

16.

Mark middle section into at least
3

segments

(top, middle,
bottom)

17.

Cut or break into sect
ions at marks and keep sections
in
order


1.

Place beaker of water on balance and tare balance

2.

Dry surface of sample segment

3.

Place segment on balance beside beaker

4.

Record the mass

5.

Remove segment

6.

Tare to zero

7.

Tie thin string (den
tal floss works well) around segment

8.

Immerse the segment in water, suspended by string

9.

Ensure the segment is not touching sides and is free from
air bubbles

10.

Record mass of segment suspended in water

11.

Repeat for each segment

12.

Measure

density

in water (mass in grams suspended in
water = volume in mLs) for
each segment:

13.

Calculate SG of sample:

SG =
Mass of Sample in Air (grams)/Mass in Water (in
grams)

14.

Mass in air

Density
(lbm/gal)
= SG x 8.33

lbm/gal

15.

Compare to density of slurry (% difference)

16.

C
onstruct density profile of segments

17.

Results can be reported in tabular format

1.

Weight of each segment (top, middle, bottom third) in air.

2.

Weight of

each segment (top, middle, bottom third)
suspended in water.

3.

Segment density (top, middle, bottom third)

4.

% deviation between segment and theoretical slurry
density