Chrome Free Lignosulfonate

Introduction

The chromium-free lignosulfonate drilling fluid viscosity reducer is a replacement for the iron-chromium lignosulfonate currently used in large quantities. The product has reached the performance index of iron chromium salt. It is suitable for oilfield perforation, oil testing, workover and other well completions, well killing fluids for stimulation operations, and well flushing operations, with little damage to the formation and low cost.
Technical Data

Appearance: Deep Brown Powder

Insoluble residue: ＜2.5%

Moisture ＜8%

PH value (2% water solution) : ＞2.8 - 3.8

Lignosulphonate Content: ＞95%
Drilling Fluid Performance

Normal temperature test Apparent Viscosity

Freshwater drilling fluid( mpa· s):＜20% Brine drilling fluid( mpa· s): ＜25%

Normal temperature test Viscosity reduction rate

Freshwater drilling fluid( mpa· s):＞85% Brine drilling fluid( mpa· s): ＞80%

High temperature test Apparent Viscosity

Freshwater drilling fluid( mpa· s):＜35% Brine drilling fluid( mpa· s): ＜45%

High temperature test Viscosity reduction rate

Freshwater drilling fluid( mpa· s):＞65% Brine drilling fluid( mpa· s): ＞60%

Concrete Admixture

Chrome-Free Lignosulfonate