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DESCRIPTION - FRITZ PCR-2 is an acrylic polymer used to control the thickening time of a cement slurry.
ADVANTAGES
• PCR-2 is a free flowing powder that may be dry blended with cement before mixing.
• It may be used to control the setting of a slurry for bottom hole circulating
temperatures up to 250ºF. (121 C).
• In saturated salt slurries, it may be used up to 350ºF. (177 C).
• It has a retarding and dispersing effect on the cement slurry during placement.
APPLICATION
• PCR-2 may be used for retarding any API class of cement (A, C, G or H).
• It may be used with other cement additives such as fluid loss additives, silica flour,
dispersants, defoamers and weighting materials.
PROPERTIES
• White Powder
• Specific Gravity – 1.47
• Bulk Density – 35 lb./gal.
• pH – 6-7
• Water requirements – none
• Packaged in 50 lb. bags
• Loading Rate – 0.1 to 1.0% bwc
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PCR-2 POLYMER CEMENT RETARDER TESTING
FLUID LOSS ADDITIVE COMPATIBILITY
Atmospheric Consistometer – 180°F
Viscometer Readings - 180°F
High Temperature Stirring Fluid Loss - 245°F
bwc FL-17 Freshwater:
Joppa Class H Cement
35% bwc 100 Mesh Silica
38% bwc Water
0.7% bwc PCR-2
0.5% bwc FL-17
Saturated Saltwater:
Joppa Class H Cement
35% bwc 100 Mesh Silica
38% bwc Water
37% bww Salt
0.3% bwc PCR-2
0.8% bwc FL-17
PCR-2
POLYMER CEMENT RETARDER TESTING
THICKENING TIME AND COMPRESSIVE STRENGTH DATA
TXI CLASS H CEMENT
4.3 GAL./SK, 16.4 LB./GAL., 1.06 CU.FT./SK |
PCR-2, % BWC |
API SCHEDULE |
BHCT, °F |
THICKENING TIME, H:MM |
0.4 |
6G |
174 |
3:04 |
0.4 |
6G |
174 |
2:52 |
0.2 |
6G |
200 |
1:46 |
0.3 |
6G |
200 |
2:38 |
0.4 |
6G |
200 |
4:45 |
0.4 |
6G |
200 |
4:12 |
0.8 |
7G |
250 |
3:10 |
0.9 |
7G |
250 |
4:48 |
THICKENING TIME, LAFARGE CLASS G CEMENT
5.0 GAL./SK, 15.8 LB./GAL., 1.15 CU.FT./SK
|
PCR-2 %, BWC |
API SCHEDULE |
BHCT, °F |
THICKENING TIME, H:MM |
COMP. STR. 12 HR,@ 174°F, PSIBHCT, °F |
0.4 |
6G |
174 |
3:11 |
1977 |
0.5 |
6G |
174 |
4:07 |
646 |
0.4 |
6G |
200 |
3:38 |
|
0.5 |
6G |
200 |
4:24 |
|
0.8 |
7G |
250 |
3:54 |
|
0.9 |
7G |
250 |
5:15 |
|
JOPPA CLASS H CEMENT 100 Mesh |
PCR-2 %, BWC |
% SALT, bww |
% Water, bwc |
Silica, bwc |
API SCHEDULE |
BHCT, °F |
TIME TO 70
Bc, H:MM |
0.2 |
0 |
35 |
0 |
7G |
200 |
3:23 |
0.225 |
0 |
35 |
0 |
7G |
200 |
4:27 |
0.2 |
37 |
38 |
0 |
7G |
200 |
3:42 |
0.7 |
0 |
35 |
35 |
7G |
250 |
4:17 |
0.3 |
37 |
38 |
35 |
7G |
250 |
3:58 |
0.7 |
37 |
35 |
35 |
9G |
308 |
4:27 |
1.0 |
37 |
35 |
35 |
9G |
308 |
7:31 |
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