API13A. Drilling Grade Bentonite Specification And Zenith MTW Mill


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

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