Overview – API 13A Section 12
Attapulgite powder, forms gel structures in salt water and is used in special saltwater drilling mud for drilling formations contaminated with salt. Particles can be considered as charged particles with zones of positive and negative charges. The bonding of these alternating charges allows them to form gel suspensions in salt and fresh water.
SPECIFICATIONS FOR DRILLING GRADE ATTAPULGITE POWDER
GRADE: SECTION API – 12
(as per ISO 13500 or API 13A)
Physical Properties
| Sr No | Parameters | Unit | Specification |
| 1 | Viscosity @ 600 rpm | cps | 30 min |
| 2 | Residue > 75 micron | % | 8 max |
| 3 | Moisture Content | % | 16 max |