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Low Friction Acidizing
The low-friction acid used for deep oil and gas wells acidizing is independently developed by our company. It has secured three invention and utility model patents. It comprises two additives: low-friction acid thickening agent WLD11 and acid composite enhancer WLD12. The low-friction acid thickening agent is synthesized through cationic polymer modification, while the acid composite enhancer is composed of organic compounds like surfactants.
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Technical Details
Low Friction Acid Thickening Agent
Appearance White/yellow Viscous Liquid
Density 0.95-1.05g/cm³
2% Dosage Acid Viscosity (170S-1） ≥24mPa·s
Thermal Stability ≥40%
Friction Reduction Rate ≥60%

Acid Composite Enhancer
Appearance Brown Clear Transparent Liquid
Density 1.10-1.20g/cm³
Corrosion Rate at 90°C
＜5g/m²·h
Surface Tension of Residual Acid ＜28mN/m
Iron Ion Stability Capacity ≥80mg/mL

Recommended System Formulation and Performance
20% Hydrochloric Acid +2~2.5% Low Friction Acid Thickening Agent WLD11 + 1~3% Acid Composite Enhancer WLD12
Detailed Parameters
 		Technical Parameter
 		Measured Data
Acid Viscosity (170S-1） >24mPa·s 27mPa·s
Corrosion Rate at 90°C <5g/m²· h 3.1087g/m²· h
Iron Ion Stability Capacity >80mg/mL 160.783mg/mL
Technical Advantages


The low-friction acid used for deep oil and gas wells acidizing is independently developed by our company. It has secured three invention and utility model patents. It comprises two additives: low-friction acid thickening agent WLD11 and acid composite enhancer WLD12. The low-friction acid thickening agent is synthesized through cationic polymer modification, while the acid composite enhancer is composed of organic compounds like surfactants.


A viscous acidizing fluid is prepared by adding a proportional mixture of the low-friction acidthickening agent and the acid composite enhancer to the acid solution. lt is then pumped intothe target formation by surface pumps. The fluid delays the diffusion and transfer of H+ ions,resulting in a slower reaction and reduced filter loss, thus extending the acid's reach andachieving deep formation acidizing. >


This product excels in operations that require low friction. The primary effective components in the thickening agent of low-friction deep acidizing acid are polyacrylamide/polyoxyethylene ether cationic polymers. They possess long, flexible chains and introduce flexible side chains,enhancing friction reduction performance. The longer molecular chains alter the direction and magnitude of radial microelement motion, forcing radial stress to convert into axial stress and counteracting forces in fluid flow. This leads to reduced vortex, ultimately reducing flow resistance and improving pumping efficiency.


As measured by a pipeline friction tester, this system achieves a friction reduction rate between 55% and 65%, which is 15%~20% lower than conventional gel acid systems.

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