API13A. Drilling Grade Bentonite Specification And Zenith MTW Mill
2020-09-17
Product: Bentonite
Grade: Drilling Grade
Product Description: API Specification 13A – 9.1.1
Drilling-grade bentonite is a naturally occurring clay containing the clay minerals of smectite. It can also contain accessory minerals, such as quartz, mica, feldspar and calcite.
Product Physical Requirements: API Specification 13A – 9.1.2
Drilling-grade bentonite shall be deemed to meet the requirements of this International Standard if a composite sample representing no more than one day’s production conforms to the physical specifications of Table 8, represents the product produced and is controlled by the manufacturer.
Table – Bentonite Physical Specifications
| Requirement | Standard |
| Suspension properties: | |
| Viscometer dial reading at 600 r/min | Minimum 30 |
| Yield point/plastic viscosity ratio | Maximum 3 |
| Filtrate volume | Maximum 15,0 ml |
| Residue of diameter greater than 75 µm | Maximum mass fraction 4,0 % |
Shanghai Zenith Grinding Mill Solution: MTW Trapezium Mill
