Desco

BY DRILLING SPECIALTIES

Desco Deflocculant is a proprietary tannin-based product used for rheology control in water-based muds. It is readily soluble over a wide range of temperatures and is effective in low concentrations without requiring the use of caustic soda.

Advantages

• Maximum deflocculation and shear strength reduction at low concentrations

• 4 to 8 times more effective than Iignosulfonates, depending on conditions

• Soluble in systems of high salinity, high hardness and at any pH

• Scavenges oxygen and inhibits corrosion

• High-temperature rheology control; proven effective in excess of 4000 F (2040C)

• Solution pH is 8.5± - no caustic needed to activate

• Reduces the effects of cement contamination

Application                                                                                   Material Needed

Low pH Desco System                                                 1 to 4 ppb (dep. MBT and mud weight)

Defoamer in salt muds                                                  0.1 to 0.25 ppb

Top hole and low solids, semi-dispersed                        0.1 to 0.5 ppb

Supplement lignosulfonate, lignite muds                          Ratio of 4 Iignosulfonate or lignite to 1 Desco 

Deep, hot drilling where lignosulfonates degrade             Ratio of 4 lignite to 1 Desco

Saturated salt, inhibited or contaminated muds                0.25 to 3 ppb

Conditioning drilling mud for packer mud                         0.5 to 3 ppb for shear strength control

(any density)

Cement preflush                                                             2 to 3 ppb

P.O. BOX 2193, HOUMA LA 70361

PHONE: 985-860-0300 FAX: 504-285-0713

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