C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
31/9
C01G 49/08 (2006.01) C09K 8/03 (2006.01)
Patent
CA 1265665
ABSTRACT Invention Patent " PROCESS FOR DRILLING MUD ADDITIVE PREPARATION AND ADDITIVE FOR DRILLING MUD A process for preparing a high surface area iron oxide additive for aqueous drilling muds is described, with the additive being intended for seques- tering the sulfides present in the formation, and be- ing obtained from the fluidized bed pyrite roasting residues, with the residue fraction of particle size between 0.074mm and 0.037mm(200 and 400 mesh) being subjected to magnetic separation, whereby a magnetic fraction useful for the invention, and a non-magnetic rejected fraction are obtained. The magnetite additi- ve has a surface area from 2.9 to 3.3 m2/g, and, when incorporated into drilling muds will not change their rheological properties, even if employed in large amounts.
499486
Abdel-Rehim Hosam Ahmed Abdallah
Da Ponte Ielton Frederico
de Figueiredo Joao Tavares Neiva
Filho Franz Xaver Horn
Peiter Carlos Cesar
Gowling Lafleur Henderson Llp
Petroleo Brasileiro S.a. - Petrobras
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