Rhodia Operations

Centre National De La Recherche Scientifique

Ifp Energies Nouvelles

James Wilson

Mathias Destarac

Dominique Labarre

Arnaud Cadix

Aymeric Guinaudeau

Stéphane Mazieres

Simon Harrisson

Herve Adam

Patrick Gateau

Chris Jones

Benjamin Herzhaft

Jean-Francois Argillier

Jean-François Argillier

Brigitte Bazin

Patrick Ferlin

Hervé Adam

Carole Rouault

Fadila Benachich

Destarac Mathias

The present invention relates to a process for preparing a polymer with a mass Mw of less than 300 000 g/mol (especially between 1000 and 300 000 g/mol), comprising a step (E) of controlled radical polymerization in which the following are placed in contact in an aqueous medium in which are dispersed surfactant micelles:

Multiblock amphiphilic polymers

Amphiphilic multiblock polymers

The present invention relates to a fracturing fluid comprising, in an aqueous medium:

Fracturing fluids based on associative polymers and on labile surfactants

The invention relates to compositions for inhibiting the formation of deposits in underground formations such as oil wells, comprising, in a solvent medium, polymers P resulting from the radical copolymerization, preferably controlled and in solution, of a mixture including: monomers having an ethylenically unsaturated structure, selected from monomers that form, by polymerization, a polymer that has an effect of inhibiting the formation of organic and/or inorganic deposits; and polyethylenically unsaturated, cross-linking monomers carrying at least one group that can be cleaved between two ethylene unsaturations, said polymers P being present in the solvent in the form of dispersed nanogels.

Polymer composition for inhibiting the formation of inorganic and/or organic deposits in underground formations

The present invention concerns a process for preparing a polymer comprising at least one gel polymerization step (E) in which the following are contacted:

Preparation of hydrophilic polymers of high mass by controlled radical polymerization

The present invention relates to the preparation of block copolymers, which can be used in particular as rheology agents, suitable, inter alia, for oil extraction, comprising a step of radical micellar polymerization wherein the following are brought into contact in an aqueous medium: &#x2014;hydrophilic monomers, dissolved or dispersed in the aqueous medium; &#x2014;hydrophobic monomers in the form of a micellar solution, i.e. containing, in a dispersed state, micelles comprising these hydrophobic monomers; &#x2014;at least one radical polymerization initiator; and &#x2014;at least one radical polymerization control agent. The polymers obtained according to the invention can be used in particular for enhanced oil recovery (EOR).

Preparation of amphiphilic block polymers by controlled radical micellar polymerisation

The present invention relates to a method for preparing a polymer based on N-vinyl lactam monomer units, which comprises a step (E) for controlled radical polymerization of a composition comprising:

Controlled free-radical polymerization of N-vinyl lactams in an aqueous medium

The current invention relates to families of scale-inhibitors having different UV/VIS absorption profiles and their application in a method for stimulating an oilfield comprising those families.

Families of scale-inhibitors having different absorption profiles and their application in oilfield

The present invention concerns a method for preparing a polymer comprising a step (EI) for dispersed phase polymerization in the presence of a reactive stabiliser, wherein the following are brought into contact in an aqueous phase:&#x2014;at least one ethylenically unsaturated monomer; &#x2014;at least one source of free radicals; and&#x2014;a reactive stabiliser comprising a polymer chain including monomer units (N-vinyl lactam) and a thiocarbonylthio-S group (C&#x2550;S)&#x2014;.

Live poly(n-vinyl lactam) reactive stabilizers for dispersed phase polymerization

The present invention concerns a method for preparing a polymer comprising a step of radical polymerization of monomers comprising at least monomers (M1) chosen from acrylic acid, one of the salts of same, or the mixture thereof, in which said radical polymerization step is carried out:

Method for synthesizing polymers from acrylic acid, one of the salts of same or the mixture thereof

The present invention concerns a method for the dispersed phase polymerization of halogenated vinyl compounds, having the formula RRC&#x2550;CXX, where: X&#x2550;F or CI, X&#x2550;H, F or CI, each of Rand R, separately represents: &#x2014;H, CI, F; or&#x2014;an alkyl group, preferably chlorinated and/or fluorinated, and more advantageously perchlorinated or perfluorinated, comprising a step (E1) wherein said monomers are introduced into an aqueous phase together with&#x2014;at least one source of free radicals; and&#x2014;at least one reactive stabilizer comprising a polymer chain and a thiocarbonylthio-S group (C&#x2550;S)&#x2014;, said polymer chain comprising non-(N vinyl lactam)monomer units.

Dispersed phase polymerization of halogenated vinyl monomers in the presence of live reactive stabilizers

The invention relates to a copolymer having: The invention also relates to a method for preparing such a copolymer, an inhibitor composition including such a copolymer, and a method for inhibiting inorganic deposits in a petroleum reservoir by means of said inhibitor composition.

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Coye la Foret, France

James Wilson