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Product
DRILLING GRADE
Bentonite having good thixotropic suspension properties and very low filtrate volume is selectively prepared as additive to the drilling fluid. It is widely used in petroleum drilling and drill for the pilling work eg. civil construction grade.
Petroleum industries through out the world follows the standards laid by American Petroleum Institute (API) and Oil Companies Materials Association (O.C.M.A.)
SPECIFICATIONS FOR API GRADE
| REQUIREMENT | STANDARD |
|---|---|
| Suspension Properties | |
| Viscometer dial Reading at 600 r/min. | Minimum – 30 |
| Yield Point/plastic Viscosity Ratio | Maximum 3 |
| Filterate Volume | Maximum 15.0 cm3 |
| Residue of diameter grater than 75 micron. | Maximum mass fraction – 4.0% |
SPECIFICATIONS FOR O.C.M.A. GRADE
| REQUIREMENT | STANDARD |
|---|---|
| Suspension Properties | |
| Viscometer dial Reading at 600 r/min. | Minimum – 30 |
| Yield Point/plastic Viscosity Ratio | Maximum 6 |
| Filterate Volume | Maximum 16.0 cm3 |
| Residue of diameter grater than 75 micron. | Maximum mass fraction – 2.5% |
SPECIFICATIONS FOR O.C.M.A. GRADE
| REQUIREMENT | STANDARD |
|---|---|
| Suspension Properties | |
| Viscometer dial Reading at 600 r/min. | Minimum – 30 |
| Yield Point/plastic Viscosity Ratio | Maximum – 8 |
| Filterate Volume | Maximum – 16-18 cm3 |
| Liquid limit | 400 – 600 |
| Partical size/Fineness | 85% through 200 B.S. |