OS ROP COAT - Shale Cuttings Encapsulator  




Drilling fluid systems and additives have an enormous effect on rates of penetration, ROPs.

Shale drilling represents one of the biggest challenges for water based fluids and inhibition, cuttings control and bit/BHA management are fundamental to maximizing ROP.

Inhibition is the first line of defense when drilling shales but the subsequent management of the cuttings and maintaining a clean bit/BHA are often ignored resulting in poor ROPs and much trouble time.


OS ROP used with OS ROP COAT and OS ROP XL will triple lock maximum ROPs when shale drilling.


Product Information 

OS ROP COAT is a powdered cationic acrylic copolymer additive which is manufactured in the form of a white, free flowing material and applied as a very effective encapsulating additive. It is used in conjunction with OS ROP and OS ROP XL to give complete protection in water based drilling fluids when reactive shales are encountered.


Typical Physical Properties 

Appearance   -   White powder                                 

Solubility   -   Soluble in water

Ionic charge   -   Cationic acrylic copolymer



OS ROP COAT encapsulates shale cuttings with a thin layer of polymer virtually eliminating dispersion and the need for large volumes of dilution. Cuttings appear at the shakers intact and firm.



OS ROP COAT is effective in sea water and sodium and calcium brines, with an expected dosage rate of 2 to 4 pounds ppb of drilling fluid, and is most effective when the drilling fluid is in the pH range of 9 to 10.



OS ROP COAT is packaged in 25 kg sacks.




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