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Sodium Asphalt Sulfonate

Sodium Asphalt Sulfonate


Sodium Asphalt Sulfonate is partially water soluble and water dispersible. It acts to aid in stabilizing shale sections, controlling solids dispersion and improving wall cake characteristics. Unlike some other blending gilsonite, it is highly sulfonated by unique process which leads to partially oil soluble as well. This property gives more excellent emulsifying characteristic. It is also highly resistant to temperature. Sodium Asphalt Sulfonate stabilizes shale formation by inhibiting disintegration of the shale both chemically and physically. It inhibits the dispersion of drilling cuttings, controls high temperature high pressure (HTHP) filtration. It reduces torque and drag, prolongs the life of the bit, improves filter cake quality and enhances well productivity. It also acts as an emulsifier of diesel oil.


Items index
FT-1 FT-1A
Appearance Powder Powder
PH 8-9 8-9
Moisture % ≤8.0 ≤8.0
Sodium sulfonate content % ≥10.0 ≥10.0
water soluble content % ≥70.0 ≥70.0
oil soluble content % ≤25.0 ≤25.0
HTHP FL reducing rate % ≥25.0 ≥25.0
Asphalt content % -- ≥42.0



They can emulsify fresh water or sea water with oil,depress the solid expansion of drill chips, control HTHP FL, produces thin and tenacious mud cakes, helps maintain low shearing rate under HTHP, cleans and stabilizes well holes that have a great deal of collapsing shales. Stabilize shale statum reduce rotative torque and prevent jamming substitute of oil, including crude oil,waste engine oil and dieserl oil depress the solid expansion of drill chips control HTHP EL produce thin and tenacious mud cakes.

Recommended quantity to be added: 1-4%


Storage & Package:

25Kg net,sealed in 3-in-1 compound paper bag with plastic lining. During storage and transpory

see that the bag is intact as the product is water soluble. But its property is not affected even if it becomes damp


Key Words:

Sodium Asphalt Sulfonate; Asphalt Sulfonate

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