Tuf Additive No. 2™ is an odorless, fibrous material that can be added to cement slurries or Super Flush™ additive to impart bridging and matting properties for preventing lost circulation. It can be used at bottomhole circulating temperatures (BHCTs) between 60°F and 260°F (16°C to 127°C). Normal additive concentrations are 1/8 to 1/2 lb/sk of cement (0.06 to 0.23 kg/sk). Large concentrations of Tuf Additive No. 2 additive can cause mixing problems. Because this additive can cause bridging at valves, it should be batch-mixed on the job and not at a pneumatic plant.
Tuf Additive No. 2 additive provides the following benefits:
It can help impart shatter resistance to set cement.
It is an inert material and will not alter the properties of other additives.
It can help increase slurry durability.
Tuf Additive No.2Ã¢â€žÂ¢ Lost Circulation Additive