Process for drilling mud additive preparation and additive for drilling mud
CA 1265665 C · Owner: Abdel-Rehim, Hosam Ahmed Abdallah · Inventors: Abdel-Rehim, Hosam Ahmed Abdallah; Peiter, Carlos Cesar; De Figueiredo, Joao Tavares Neiva
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 sequestering 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 additive has a surface area from 2.9 to 3.3 m2/g and, when, incorporated into drilling muds …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.