CR 650

Core Recovery Polymer

Description :

CR-650 is a high molecular weight, powdered polymer which has been developed to improve core recovery, particularly in broken and sandy formations. It may also be used to stabilize reactive clays and shales and to provide lubrication when diamond drilling in bad conditions.


CR-650 forms a protective polymer film on the drill core and on the walls of the bore hole. This polymer film reduces water invasion into hydratable and dispersive clays and shales. CR-650 is also very effective for stabilizing loose, friable sand formations. CR-650 can be used as a single product, low solids mud system, or it can be combined with AUS-GEL/AUSTROL to form a complete mud system.

  1. Effective - mixes rapidly in fresh to brackish water with minimum shear.
  2. Economical - 92% active. Provides excellent viscosity at a minimum concentration.
  3. Environmentally friendly - non-hazardous, non-toxic and will not ferment.
  4. Compatible - will not wash off ROD-GREASE.
Recommended Treatment
Appllication kg / m3
Add to fresh water under normal drilling conditions 0.5 - 0.75
To stabilize swelling clays and shales 0.75 - 0.1
To improve core recovery in sandy, friable formations and to increase hole stability 1 - 2
CR-650 should be mixed by adding slowly through a jet tunnel or high speed stirer.

Packaging : 15 Kg bags