The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2019
Filed:
Feb. 25, 2016
Petróleo Brasileiro S.a.—petrobras, Rio de Janeiro, RJ, BR;
Universidade DE São Paulo—usp, São Paulo, SP, BR;
Koiti Araki, Cotia, BR;
Sergio Hiroshi Toma, São Paolo, BR;
Delmárcio Gomes Da Silva, São Paolo, BR;
Henrique Eisi Toma, São Paolo, BR;
Rita de Cássia Comis Wagner, Rio de Janeiro, BR;
Bernardo Coutinho Camilo Dos Santos, Rio de Janeiro, BR;
Alex Tadeu de Almeida Waldmann, Rio de Janeiro, BR;
PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro, BR;
Universidade de Sao Paulo—USP, Sao Paulo, BR;
Abstract
This invention describes the development of technology for the preparation of superparamagnetic lipophilic nanofluids, as well as of drilling fluid additives based on the aforementioned nanofluids, which improve the properties which form walls or mud filter cakes and concomitantly act as contrast agents in RMN logging.