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General introduction

Superfine calcium carbonate is an oil soluble drilling fluid. It is used as a weighting agent of protecting oil reservoir in drilling and completion fluid. Besides it can be as an acid soluble lost circulation materials, which is more effective than common calcium carbonate powder.

Property index

Items

Index

 

Type I

Type Ⅱ

density , g/cm 3

2.70±0.10

2.50±0.10

Calcium carbonate content ,%

≥97.0

Grain size

Bigger than 20μm ,% ≤

20.0

5.0

 

Smaller than 2μm ,% ≤

30.0

40.0

 

X 50 (mid-value diameter),μm

4.0 ~ 10.0

2.0 ~ 4.0

Functions

1. white powder, odorless, hard to be soluble in water and alcohols, sparing soluble in aqueous solution with ammonium salt or carbon dioxide, soluble in acetic acid. diluted hydrochloric acid. and diluted nitric acid 。 When expose in air, it has a slight hygroscopicity .

2. It is a good weighting agent of protecting oil reservoir.

3. It is an acid soluble lost circulation materials.

4. Fine grains , meet the requirements of different geology.

5. No poison. pollution free , meeting the environmental requirement

6. Simple application on site and directly added.

Notes

Stored in a dry and ventilated place and kept off rain and sun.

Package

This product is packaged in complex kraft paper sacks (three-in-one) with waterproof plastics as lining.(Net weight 25kg per sack).