oil drilling ca2789289a1

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  • US8962537B2 Oil well drilling fluids, oil well cement

    The present invention relates to oil well drilling comprising a weighting agent consisting of microfine, particulate ilmenite having a FeTiO 3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m 2 /g, where 90% by volume of the particles have a size of less than 12.5 μm and a D50 between 3 μm and 6 μm by volume measured by laser diffraction using Malvern laser

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  • WO2013009187A1 Oil well drilling fluids, oil well cement

    The present invention relates to oil well drilling comprising a weighting agent consisting of microfine, particulate ilmenite having a FeTi03 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2/g, where 90% by volume of the particles have a size of less than 12.5pm and a D50 between 3pm and 6pm by volume measured by laser diffraction using Malvern laser

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