Bentopowders brand BM-T ("Tunnels") for shield Tunneling
Clay powders of these grades belong to high-quality bent powders, are made from imported bentonite raw materials, and meet the requirements of API-13A standard of the American Petroleum Institute.
Bentopowder of this brand is used for the preparation of bentonite suspensions used for shield tunneling, it is economical in consumption and also has a wider range of controlled rheological characteristics that most fully reflect the conditions for the construction of such underground structures.
BM-T bentopowders ("Tunnels") are manufactured according to the technical specifications TU 5751-001-18882549-14 "Bentonite clay powders for drilling fluids", developed in accordance with the requirements of API-13A.
Characteristics of clay powders
No. | Level of quality | Unit measuring | Mark |
BM-T ("Tunnels") | |||
one | Viscometer readings at a speed of 600 rpm, not less | units | thirty* |
2 | Plastic viscosity (PV), no more | MPa · s | 10** |
3 | Yield point (Yeld point) YP, not less | Pa | 10 ... 16 ** |
four | Conditional viscosity, no more | from | |
5 | Filtration rate, no more | cm 3 | 16** |
6 | Mass fraction of moisture, no more | % | 10 |
7 | PH value, no more | units | 10 |
8 | Wet sieve analysis: sieve residue, not more than - mesh No. 05 - mesh No. 0071 | % | 0 2,5 |
9 | Packaging | At the request of the customer: 1t big bag, 40kg kraft bag |
*) for a solution concentration of 64 g / l
**) for a solution concentration of 50 g / l