PVAModerate Temperature Cement Fluid Loss Additive

The PVAmoderate temperature cement fluid loss additive is a kind of non-ionic polymerfluid loss additive with unique advantages. It is a type of gray-yellow powder,with the bulk density reaching 0.75±0.10g/cm3. It is partly soluble in waterand smells slightly pungent. The amount of residues on a 0.315mm sieve is lowerthan 15%. In addition, this PVA moderate temperature cement fluid loss additiveconsists of 50% PVA (CAS number: 9002-89-5, 25% dispersant, 22%Slag, and 3%Sodium borate (CAS number: 1303-96-4). The CG210S PVA moderate temperaturecement fluid loss additive can effectively control the fluid loss content incement slurry, with the bottom hole circulating temperature (BHCT) lower than203℉ or 95℃. It is suitable for low-moderatetemperature well cementing operation, and can be only used for dry-mixedpurpose. The general dosage of this PVA moderate temperature cement fluid lossadditive is 1.2-2.0% by weight of cement (BWOC), and the recommended amount is1.6% by weight of cement (BWOC).

Our PVA moderatetemperature cement fluid loss additive is not retarded and has no effect on thestrength development of set cement. It is not applicable to either hightemperature cement slurry system or brine cement slurry system. In addition, itwill become less efficient or even loss efficiency if used in cement that isnot accordant with American Petroleum Institute (API) standard. In orderto improve the poor high temperature resistance and salt tolerance of the PVAsystem, the method of chemical cross-linking can be adopted for themodification of PVA. For example, the condensing agent such as aldehydes or acids can react withthe alcohol-based part of the PVA, resulting in cross linked PVA. This modifiedPVA can be used alone, with no need of borax and other crosslinking agents. Hence, our PVA moderatetemperature cement fluid loss additive can resist the temperature up to 120 °C, and is efficient even in 8% brine. In addition, the filtration rate of thisfluid loss additive can be controlled in 50mL or less.

Performance of Slurry with PVA Moderate Temperature Cement Fluid Loss Additive

We are PVA moderate temperature cement fluid loss additive manufacturer basedin China.At Kelioil we offer fluidloss additive, retarder,cement dispersant, anti fluid channeling latex cement additive, and many othercementing additives.