Ifp Energies Nouvelles

Institut Francais Du Pe'trole

Institute Francais Du Petrole

Eric Lecolier

Christian Wittrisch

Patrick Gateau

Alain Rivereau

Annie Audibert

Delphine Bazer-Bachi

Loic Rouleau

Xavier Longaygue

Benjamin Herzhaft

Stephane Zinola

Stefania Cassiano Gaspar

Olivier Vincke

Jerome Chevalier

Yves Jorand

Nathalie Palazzo

Stéphane Zinola

David Pasquier

Laurent Cangemi

Bogdan Harbuzaru

The present invention describes a fluid which is suitable for the decontamination of heat engines which can carry out both the catalytic reduction of oxides of nitrogen (NOx) contained in exhaust gases and assist in the regeneration of the particulate filter (PF), said fluid being in the form of a stable suspension of colloidal particles, these colloidal particles being dispersed in an aqueous solution containing at least one reducing agent or at least one precursor of a reducing agent for NOx. The invention also describes several embodiments for the preparation of said fluid.

Fluid for purifying heat engines using stable suspensions of metal colloidal particles, and methods for preparing said fluid

The present invention concerns a process for developing a subterranean formation, in which at least one fluid is injected. In accordance with the invention, the fluid comprises at least one additive, the additive being labelled with at least one luminescent semiconductor nanocrystal (fluorescent or phosphorescent). In this manner, and by optical analysis of the presence of luminescent semiconductor nanocrystal in the fluid recovered from the subterranean formation, the presence and/or quantity of additive in the recovered fluid can be determined. Given that the semiconductor nanocrystal is either phosphorescent or fluorescent, the additive is rendered readily detectable and quantitatively determinable in the fluids recovered from the subterranean formation.

Process for developing a subterranean formation by injection of a fluid comprising an additive labelled with a luminescent semiconducting nanocrystal

The present invention concerns a system for measuring the quantity of fluorescent semiconductor nanocrystals present in a fluid. The system in accordance with the invention comprises a fluid circulation device (), a light source () and a fluorescence detector () for the semiconductor nanocrystals ().

System for measuring the quantity of semiconductor nanocrystals present in a fluid

A material is described in the form of a millimetric article constituted by coarse alumina particles with a median diameter in the range 10 to 200 &#x3bc;m, said coarse particles being at a distance, from one interface to another, of less than 10 &#x3bc;m, fine alumina particles with a median diameter in the range 0.5 to 10 &#x3bc;m, said fine particles being at a distance, from one interface to another, of less than 5 &#x3bc;m and being located in the space between the coarse particles, and a binder constituted by aluminium phosphate, said binder being located in the space between said fine and coarse particles, said material having a mesoporous volume, measured by mercury porosimetry, in the range 0.2 to 2 mL/g, a macroporous volume, measured by mercury porosimetry, in the range 0.05 to 0.2 mL/g and a BET specific surface area in the range 80 to 350 m/g.

Material based on alumina, with a multiscale structure, comprising an aluminium phosphate binder with good mechanical strength, and process for its preparation

The present invention relates to a formulation of a high-performance foamed cement material, comprising:

Well cementing material

The invention relates to a high-performance cement comprising an alumnic cement with an aluminium content of at least more than 30%; microsilica with a grain size of 0.1 - 20 &#x3bc;m whereby the percentage thereof is 35 % less by weight in comparison with the weight of the cement; mineral particles with a grain size of 0.5 - 500 &#x3bc;m whereby the percentage thereof is 35% less by weight in comparison with the weight of the cement, the percentage of said particles being less than that of the microsilica; a water-soluble polymer fluidifying agent whereby the percentage thereof is 0.2 to 3.0% in comparison with the weight of the cement; a retarding agent which is used to control the setting time of the slurry; an amount of water the maximum thereof corresponding to 40 % in relation to the cement.

Oil-well cement slurry

The present invention relates to a formulation of a foamed cement slurry comprising in combination:

Foamed cement slurry

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Chaville, France

Eric Lecolier