D TYPE OIL WELL CEMENT
|
Test |
unit |
standard |
Usual result |
|
|
Ignition lost |
% |
≤3.0 |
0.4 |
|
|
Insoluble |
% |
≤0.75 |
0.14 |
|
|
magnesium oxide |
% |
≤6.0 |
4.6 |
|
|
sulfur trioxide |
% |
≤3.0 |
2.9 |
|
|
tricalcium silicate |
% |
≥ / |
/ |
|
|
tricalcium aluminate |
% |
≤ 3 |
0 |
|
|
Tetra calcium aluminoferrite + 2 times tricalcium aluminate |
% |
≤ 24 |
/ |
|
|
sodium oxide to show total sodium oxide |
% |
≤ / |
/ |
|
|
water cement ratio |
|
0.38 |
0.38 |
|
|
Soundless (autoclave expansion) |
% |
≤ / |
/ |
|
|
specific area |
m2/kg |
/ |
/ |
|
|
Free fluid content |
% |
≤ / |
/ |
|
|
45oC 26.7MPa) |
15-30 min consistency |
BC |
≤ 30 |
16 |
|
Consistency time |
min |
≥ 90 |
>90 |
|
|
62oC 51.6MPa |
15-30 min consistency |
BC |
≤ 30 |
17 |
|
Consistency time |
min |
≥ 100 |
111 |
|
|
Anti pressure strength |
110 oC ,20.7MPa, 8h |
MPa |
≥ 3.5 |
4.3 |
|
110 oC , 20.7MPa, 24h |
MPa |
≥ 13.8 |
39.8 |
|
|
77 oC, 20.7MPa, 24h |
MPa |
≥ 6.9 |
24.5 |
|
|
Note: |
|
|
|
|