Overview:
DOC-GAS STOP is an AMPS/ Tannin copolymer type anti-gas channeling water loss reducer. The product can not only effectively control the water loss and free liquid of cement slurry, but also has a strong gas blocking ability, which can prevent gas migration in cement slurry, prevent gas channeling, and improve the sealing quality of well-cementing.
Product information (Liquid GAS STOP)
Appearance | Brown powder |
pH | 3～5 |
Scope of application
n Recommended usage temperature：＜180℃
n Recommended dosage：0.8%-2%
Characteristics
n The prepared cement slurry has the characteristics of high shear force and low viscosity, high stability, and easy pumping.
n It has excellent ability to control water loss and free liquid.
n It has high resistance to gas channeling, short thickening transition time, and can effectively prevent the occurrence of gas channeling.
n The product has good compatibility with other additives.
Typical performance
Dosage,bwoc | Rheology abilityΦ3/6/100/200/300
| API water loss(mL) | Compressive strength (MPa) | Thickening transition time, 40-100BC(min) | ||||
1.2% | ＞15 | ＞20 | ＞50 | ＞90 | ＜150 | ≤50 | ≥14 | ≤10 |
•Slurry formula: 100%SDG+FW+0.25% defoamer + 4% DOC-GAS STOP+0.5% Retarder.
Slurry density 1.9g/cm³
•Test temperature: 55℃
