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Hematite: iron oxide, Fe2O3, is an iron ore containing 30-65% iron.
Powdered hematite is used in oil drilling as a weighting agent for drilling muds and cement slurries due to its high density, reaching 5.2 kg/dm3. The addition of hematite to the drilling fluid does not cause significant changes in its rheological parameters.

Hematite is fast becoming a popular choice as a weighting agent in drilling fluids for production applications in the oil and gas sector - offering high performance, good stability and broad applicability through different rock types Used in both oil- and water- based mud fluids, hematite provides enhanced rheological properties, and a higher specific gravity meaning less of it can be used relative to its competitors to achieve the same result. Hematite is valued for being highly pure at the point of being mined and very hard, in addition to being economically attractive. Other uses for hematite in the oil and gas sector include for stabilising the drill holes themselves and as shielding barriers

Physical Properties:

  • Appearance : Free flowing powder

  • Colour : Dry: Red to brown powder & Wet: Grey to black & Muds: Deep reddish brown

  • Specific gravity  : ≥5

  • Bulk density : 2,178 kg/m3[136 lbm/ft3]

  • Particle hardness5–6 Mohs hardness scale

  • Water soluble alkaline earth metals, as calcium  : 100 mg/kg Max

  • Residue greater than 75µm : Max 1.5%

  • Residue greater than 45µm : Max 15%

  • Particles less than 6µm in equivalent spherical diameter : Max 15%

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