HimSil

Water glass in a dry form

(TU) 20.59.59-218-14023401-2018

HimSil is a powdered agent made by water glass modification on special drying equipment. Two grades of the agent are manufactured:
• HimSil N – sodium glass;
• HimSil K – potassium glass.
HimSil water glass in a dry form is delivered in 25 kg bags.

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Purpose

HimSil is used as an efficient clay stabilizing additive for water based drilling mud. HimSil reduces minerals’ capillar swelling. When HimSil interacts with polyad ions (Ca2+, Mg2+), nonsoluble calcium and/or magnesium silicates performs setting in pore spaces and forming nonsoluble silicate layer to hard and consolidate unstable clays. This layer prevents contact of a drilling mud with the formation. Under high temperatures (over 90°C), polycondensation of silicates and minerals performs to enhance borehole stability.

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Physical and chemical properties

Property

Grade N

Grade K

Appearance

Powder of light brown to dark color

Crystal powder of white or grey color

SiO2 content, % *

40,0-50,0

25,0-75,0

Na2O content, % *

12,0-20,0

K2O content, % *

23,0-55,0

Losses during calcination (900 °С), %

10.00-20.00

Bulk density, gr/cm3

0.3-0.7

Recommendations to application

In absence of Ca2+ soluble silicates remain stable under pH less than 10.5 (pH>10.5). In presence of Ca2+ and under pH over 10.5 (pH<10.5) precipitation performs. When silicates are added to a high-solids mud, pH should be 9 points and over. When preparing technical water based mud, pH should be 11 points and over, calcium and magnesium ions should be set with soda ash. If these actions are not held, alkaline earth ions will remove silicates from the mud. In order to select the optimal concentration, it is recommended to contact Himprom representatives.