Cement Fluid Loss Control Agent

Type 1: Cement Fluid Loss Control Additive for Low Temperature & Low Density (SFL-31)

Product Description
SFL-31 Fluid Loss Control Additive Low Temperature & Low Density agent as the main monomer is AMPS water-soluble polymers. By molecular beam chain aggregation reduces the slurry cake permeability. The polymer dispersion is strong, resistant to high temperatures and salt.

Characteristics
SFL-31 polymerization modifier made of AMPS, low molecular weight amides, polyhydroxy carboxylic acid.
Temperature resistance:30℃~160℃
Salt range: fresh to saturated water
Filtration property：< 100mlAPI FL
Solubility：soluble
Dosage：0.5﹪~1.2﹪(BWOC)
Compatibility: good
Solubility with cement: any class of cement
Well cement stability, free fluid is close to zero.
Slurry thickening transition time is short, close to a right angle thickening.
Density range: any density of cement slurry
Has a certain retarding property on the cement slurry.

Technical Specification

Appearance	Grayish white powder or granules
Moisture, ﹪	≤8.0
Fineness (0.315mm shorts), ﹪	≤0.50
Initial consistency, Bc/80℃. 46.5MPa.45min	≤30
Thickening linear	Normal
Time of 40Bc~100Bc, min	≤40
Loss of water, ml/80℃.6.9MPa. 30min	≤150
Free fluid, ﹪	≤1.4
Compression strength,MPa/102℃. 21MPa. 24h	≥14

The ingredients of the cement in the table are：G class cement 800g;water 352ml;dosage 0.8﹪SFL-31.

Type 2: Cement Fluid Loss Control Additive for High Temperature & Normal Density (SFL-32)

Product Description
The agent as the main monomer is AMPS water-soluble polymers. By molecular beam chain aggregation reduces the slurry cake permeability. The polymer dispersion is strong, resistant to high temperatures and salt.

Characteristics
SFL-32 polymerization modifier made of AMPS, low molecular weight amides, polyhydroxy carboxylic acid.
Salt range: fresh to saturated water
Temperature range: 30℃~200℃
Filtration property：< 100ml API FL
Solubility：soluble
Dosage：0.5﹪~1.2﹪(BWOC)
Compatibility: good
Solubility with cement: any class of cement
Well cement stability, free fluid is close to zero.
Slurry thickening transition time is short, close to a right angle thickening.
Density range: any density of cement slurry
It has certain retarding property in cement slurry.

Technical Specification

Appearance	Grayish white powder or granules
Moisture, ﹪	≤8.0
Fineness (0.315mm mesh), ﹪	≤15
Initial consistency, Bc/80℃. 46.5MPa.45min	≤30
Thickening linear	Normal
Time of 40Bc~100Bc, min	≤40
Loss of water, ml/80℃.6.9MPa. 30min	≤150
Free fluid, ﹪	≤1.4
Compression strength,MPa/102℃. 21MPa. 24h	≥14

The ingredients of the cement in the table are：G type cement 800g; water 352ml; dosage 1.2﹪SFL-32.

Type 3 Cement Fluid Loss Control Additive for All Temperature (SFL-200L)

Production Description
SFL-200L Fluid Loss Additive is a copolymer of ethylene monomers. It has slight retarding and dispersing effect for cement slurries. Slurries with SFL-200L have good rheology and salt-resistant ability. SFL-200L fluid loss additive is effective within a wide temperature range from 20℃ to 190°C (BHCT). It is applicable for cementing salt formations and high temperature wells.

PHYSICAL AND CHEMICAL PROPERTIES

ITEM	PHYSICAL AND CHEMICAL INDEX
ITEM	SFL-200L	SFL-200L(AF)
Appearance	Yellowish viscous liquid	Yellowish viscous liquid
Density (20±2℃), g/cm³	1.12±0.02	1.15±0.02
Apparent viscosity (10% aqueous solution, 20±2°C), mPa.s	35±7	12±3
pH (10% aq.sol.)	6.0±0.5	6.0±0.5
Freezing point, °C	--	≤-10

TECHNICAL PROPERTIES

ITEM	TECHNICAL INDEX
Fluid loss (80°C), ml	≤100
Initial consistency, Bc	≤25
Thickening time (80°C, 46.5MPa), min	≥60
Free fluid, %	≤0.5
Compressive strength (80°C, atm, 24h), MPa	≥14.0
Slurry composition: Class G cement (HSR): 800g, Distilled water: 328.0g, SFL-200L: 24.0g, Retarder: 0.8g, Defoamer: 0.4g.

USAGE
Application temperature range: 20-190°C (BHCT)
Dosage: 3-4% (BWOC)

Type 4: Cement Fluid-Loss Control Additive for Super High Temperature (SRC-12L)

Product Description

SRC-12L is a kind of colorless or slight yellow transparent sticky liquid. With this product the cement has a lower water loss, better rheological properties and stability, and lower free water. Also it has no effects on the thickening time. The compressive strength of cement stone rapidly develops at the early time. In high density system it is easily to formulate, with good performance and high strength. It also has dispersive effect.

Specification
Appearance Colorless or slight yellow liquid
Density, g/cm³ 1.05～1.20
Solubility Soluble
pH Value 5～7

Mixing & Maintenance
SRC-12LA is compatible with other additives, adapt to all kinds of water.
SRC-12LA mixed in water.
Normal range of temperature use in wells,ºC 10～220
Normal range of Concentration use in wells, BWOC, % 2.0～8.0 depends on different well temperature.

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