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General Introduction

There is no single asphalt model existing now that is available to the temperature of a whole well. The best applicable range of each asphalt is about 20-30℃, beyond this range, asphaltene does not soften and deform and can not form compact、smooth mud cake. Thus, it cannot play a role in reducing filtration loss and anti-caving. In order to satisfy the requirements of anti-caving and lubricity of different well temperature, we make asphalt with different softening point modify into water dispersible and cationic agent emulsified asphalt anti-caving and lubricant SFT series products.

There are three paste products-minimum applicable temperature 60℃,maximum applicable temperature 140℃;there are two powder products-minimum applicable temperature 120℃,maximum applicable temperature 180℃.

Property index

Series product State

Paste

Powder

Model

SFT-70

SFT-100

SFT-130

SFT-140

SFT-160

SFT-180

Applicable temperature,℃

60~80

90~110

120~140

120~140

150~160

170~180

Appearance

Black oil base paste

Black powder

Moisture ,%

≤10.0

sreening(0.45mm),%

≥80.0

PH

8~10

Water soluble content,%

≤50.0

Oil soluble content,%

≥20.0

Friction coefficient rate of reduction,%

≥25.0

≥20.0

API,mL/30min

≤15.0

≤15.0

HTHP,mL/30min

≤25.0

≤22.0

Features

Both paste and powder asphalt have certain lubricity and good filtration loss lowering effect. Besides,they will not foam at a large scale. Each model has its best applicable temperature, choose the suitable model when used on site.

The common dosage of paste asphalt is 2-4%, powder asphalt is about 2%. It is added directly in to drilling fluid.

Note

This product should be stored in a cool, ventilated place to avoid the sun and rain.

Package

Water dispersible and cationic agent emulsified asphalt SFT(paste)is packed in high pressure polyethylene plastic bucket, with net weight 50kg±1.0kg per bucket.

Water dispersible and cationic agent emulsified asphalt SFT(powder)It is packed in composite kraft paper sacks, with net weight25kg±0.5kg per sack.