Gypsum

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    Trenchless and Technical Drilling Fluids & Additives

    Gypsum

    Gypsum (CaSO4•2H2O) is a naturally hydrated Calcium Sulphate and is only slightly soluble in water. Gypsum is used as the source of calcium in clear-water drilling and in other inhibitive mud systems.

    Gypsum is hygroscopic; therefore it should be stored in a dry environment to avoid lumping and hardening.  It is advisable to use a dust mask and eye protection while mixing all powdered products.  A dust hazard is present while gypsum is being mixed.

    Gypsum Product Sheet

    a sack of gypsum
    package of gypsum powder

    Features & Benefits

    • Economical source of calcium ions for inhibition.
    • Economical treatment to remove carbonate contamination.
    • Widely available.
    • Reduces soluble carbonates.

    Physical Properties

    Appearance: Light grey powder
    Specific Gravity: 2.9 (rock)
    Bulk Density: 1120-1424 kg/m3
    Flash Point: Not available

    Chemical Properties

    Type: Inorganic Salt
    Solubility: Slight (water)
    Ph: 6.5
    Microtox: Not applicable

    Mixing & Handling

    Gypsum can be added to the mud system through the mud hopper. In lightly treated bentonite based systems the mud will flocculate with consequent thickening and an increase in fluid loss.

    Gypsum is hygroscopic; therefore it should be stored in a dry environment to avoid lumping and hardening. It is advisable to use a dust mask and eye protection while mixing all powdered
    products. A dust hazard is present while gypsum is being mixed.

    Packaging & Controls

    WHMIS: Not Controlled
    TDG: Not regulated
    Packaging: 25kg bag

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