Patents Assigned to Elf Aquitaine
  • Patent number: 5877389
    Abstract: A method for oxidatively breaking down organic compounds that have low biodegradability and are difficult to oxidize chemically in aqueous effluents, by using a water-soluble peroxide oxidant in the presence of a water-soluble iron or manganese metallophthalocyanine immobilized on an ionic resin consisting of a cross-linked insoluble copolymer derived from a vinylaromatic monomer comprising cationic or anionic groups. The method is particularly suitable for oxidatively decomposing polyhalogenophenols and halogenated hydrocarbons.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: March 2, 1999
    Assignee: Elf Aquitaine
    Inventors: Alexander Sorokin, Bernard Meunier, Jean-Louis Seris
  • Patent number: 5861207
    Abstract: Active composite consisting of a compressed support and of at least one agent which is active towards a gas, the compressed support including recompressed expanded graphite which has a density of between 0.02 and 1.5. According to the invention the active composite is made up of a series of sheets superposed one above the other, the active agent being dispersed in the flakes.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: January 19, 1999
    Assignees: Elf Aquitaine, Le Carbone Lorraine
    Inventors: Pierre Bou, Michel Moreau, Philippe Prades
  • Patent number: 5857345
    Abstract: Method of managing a solid/gas adsorption or thermochemical reaction, the site of which is a device comprising a reactor, which contains a solid capable of reacting with a gas, an evaporator/condenser assembly for the gas and means intended to reheat the solid, the method comprising the steps which consist in:bringing the evaporator/condenser assembly, when the latter is filled with liquid, into communication with the reactor so as to cool the evaporator,switching on the means intended to reheat the solid, so as to deliver the gas to the evaporator/condenser assembly.According to the invention, the step of switching on the means intended to reheat the solid starts before the previous step has finished.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: January 12, 1999
    Assignee: Elf Aquitaine
    Inventors: Jacques Prosdocimi, Bernard Spinner, Vincent Goetz
  • Patent number: 5859340
    Abstract: Recombinant gene coding for a protein having endochitinase activity or for a precursor thereof which comprises the sequence of SEQ ID NO:1 below:Gly Gly Asp Leu Gly Ser VaL Ile Ser Asn Ser Met Phe Asp Gln Met Leu Lys His Arg Asn Glu Asn Ser Cys Gln Gly Lys Asn Asn Phe Tyr Ser Tyr Asn Ala Phe Ile Thr Ala Ala Arg Ser Phe Pro Gly, Phe Gly Thr Ser Gly Asp Ile Asn Ala Arg Lys Arg Glu Ile Ala Ala Phe Phe Ala Gln Thr Ser His Glu Thr Thr Gly Gly Trp Pro Ser Ala Pro Asp Gly Pro Phe Ala Trp Gly Tyr Cys Phe Leu Arg Gly Arg Gly Asn Pro Gly Asp Tyr Cys Ser Pro Ser Ser Gln Trp Pro Cys Ala Pro Gly Arg Lys Tyr Phe Gly Arg Gly Pro Ile Gln Ile Ser His Asn Tyr Asn Tyr Gly Pro Cys Gly Arg Ala Ile Gly Val Asp Leu Leu Asn Asn Pro Asp Leu Val Ala Thr Asp Pro Val Ile Ser Phe Lys Thr Ala Ile Trp Phe Trp Met Thr Pro Gln Ser Pro Lys Pro Ser Cys His Asp Val Ile Ile Gly Arg Trp Asn Pro Ser Ala Gly Asp Arg Ser Ala Asn Arg Leu Pro Gly Phe Gly Val Ile Thr Asn Ile Ile Asn Gly Gly Leu Glu Cys Gly Arg Gly Asn Asp Asn Arg Val Gln Asp Arg Ile Gl
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 12, 1999
    Assignees: Sanofi, Elf Aquitaine
    Inventors: Michel Dubois, Rene Grison, Jean-Jacques Leguay, Annie Pignard, Alain Toppan
  • Patent number: 5857346
    Abstract: A thermochemical system and process for producing heat and/or cold by solid-gas chemical reaction is disclosed. The system and process utilizes a reactant formed of a compressed support and at least two salts which are distributed throughout the compressed support, the salts being active towards a gas. The salts of the reactant are selected for the system and process so that in the system and process one salt will react with the gas in the reactor while the other salts in the reactant remain substantially unreacted to produce heat or cold at a first temperature or power level and, thereafter, one of the other salts of the reactant reacts with the gas to produce heat or cold at a second temperature or power level which is different from the first temperature or power level.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: January 12, 1999
    Assignee: Elf Aquitaine
    Inventor: Vincent Goetz
  • Patent number: 5858489
    Abstract: System for thermal and/or acoustic insulation of a tube intended, for example, to allow the outflow of hydrocarbons originating from an oil deposit, consisting of a sleeve surrounding the tube over at least a part of its length. According to the invention, the sleeve consists of an aerogel. A method for thermal and/or acoustic insulation of a tube is also described.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: January 12, 1999
    Assignee: Elf Aquitaine Production
    Inventor: Jean-Louis Beauquin
  • Patent number: 5817889
    Abstract: An amount of water is added to a glycol solution to be purified to enable segregation of the resulting mixture into a hydrocarbon phase and a glycol phase. The hydrocarbon phase is separated from the glycol phase and said glycol phase is desalted, e.g. by electrodialysis, to give a desalted and substantially hydrocarbon-free glycol solution which is then concentrated by steam stripping. The method is useful for purifying waste glycol solutions resulting from oil or gas production effluent processing using glycols, and in particular from a gas hydrate inhibition treatment or natural gas dehydration.
    Type: Grant
    Filed: August 7, 1995
    Date of Patent: October 6, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Chantal Pondebat, Claude Blanc, Daniel Morin
  • Patent number: 5817716
    Abstract: The process includes the reaction of a chloroformamidinium chloride with a polystyrene-divinylbenzene resin functionalized with primary amine groups. The resins which can be obtained according to this process may in particular have a spacer arm of general formula (IV):--CH.sub.2 --(--X--CH.sub.2 --CH.sub.2 --).sub.m -- (IV)with X representing oxygen or sulphur and m being equal to 1 or 2. This spacer arm bears at its end, on the right, a primary amine group or a guanidine group.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: October 6, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Pierre Le Perchec, Marie Abiuso, Emmanuel Arretz
  • Patent number: 5812493
    Abstract: A method for representing in a space-time domain the trajectory of at one borehole by:a) producing a velocity-depth model (4) tied to the borehole (1), geologically representative of said area and including a representation of said trajectory (5) of said borehole;b) selecting at least one point (A) on or near said trajectory, said point (A) being defined by its space coordinates and by at least one dip-azimuth data pair; andc) at least modelling in a synthetic stack domain (9) the image (a) of the selected point (A), said image (a) being defined by space-time coordinates and by a dip-time vector and being obtained by zero offset ray tracing in the velocity-depth model (4).
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: September 22, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Etienne Robein, Stefan Kaculini
  • Patent number: 5807305
    Abstract: An iontophoresis device in which at least one of the electrodes is a composite electrode containing a polymeric binder, a powdered or fibrous conductive filler and a divided material capable of being consumed by electrochemical oxidation or reduction. The binder of the composite electrode consists of a polymer containing 10-100 mo % of 1,2-epoxypropane and/or 1,2-epoxybutane, and 40-0 mol % of at least one other monomer that is copolymerizable with such oxides. The device is useful for transcutaneously delivering active principles to a patient.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: September 15, 1998
    Assignees: Sanofi, Elf Aquitaine
    Inventors: Daniel Muller, Henry Saunal
  • Patent number: 5788000
    Abstract: The subject of the present invention is a stabilizer-reamer for drilling an oil well. The invention provides an improvement to drillpipe string stabilizers used when drilling an oil well.The purpose of the stabilizer, which forms the subject of the invention, is to allow the drillpipe string to be raised through fractured formations, in addition to its normal function of stabilizing the drillpipes.To this end, it is fitted with retractable abrasive blades which make it possible to re-drill the fractured formations when the drillpipes are being raised and to avoid jamming in the well.The main claims relate to the novel function of the stabilizer, to the geometry of its elements and to the mechanism of opening the blades.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: August 4, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Vincent Maury, Jean-Claude Guerin
  • Patent number: 5786511
    Abstract: The preparation of organic disulphides and polysulphides by reaction of sulphur with a mercaptan or with a polysulphide of lower sulphur order in order to convert it into polysulphide of higher order, or alternatively by reaction of a mercaptan with an organic polysulphide of high sulphur order in order to convert it into polysulphide of lower sulphur order, in the presence of a catalyst in the form of a resin with a basic function, characterized in that the resin is based on polystyrene-divinylbenzene (PS-DVB) functionalized with primary amino groups and having the general formula (I): ##STR1## being the PS-DVB resin support, L being a linear organic radical which is as long as or longer than the methylene radical (--CH.sub.2 --).
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: July 28, 1998
    Assignee: Elf Aquitaine Production
    Inventor: Emmanuel Arretz
  • Patent number: 5784335
    Abstract: A method for making a 3-D cube of near traces from data acquired in a marine reflection seismic survey.A method for making a 3-D cube of near traces using at least one source (S.sub.1, S.sub.2) and a plurality of streamers (4 to 7) spaced from the source, each comprising receivers/recorders (R.sup.1.sub.4, R.sup.1.sub.5, R.sup.1.sub.6, R.sup.1.sub.7) as well as means for the space tracking of each source and each streamer, the image of the subsurface being produced in three dimensions with a system of X, Y, T axes in the form of a 3-D cube by assigning to each bin of a group of bins forming a group with a regular grid in an X,Y plane, a central trace represented at the center of said bin along the time axis (T), said method being characterized in that for each line navigated, said central trace is produced from at least a first recorded trace whose offset is as close as possible to a constant offset equal to the smallest offset common to at least the group of traces of the navigated line.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: July 21, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Christian Deplante, Michel Revoy
  • Patent number: 5777609
    Abstract: Process for using colors on a screen with which is associated a color palette especially adapted for the visualization of an image, the content of which is a function of an angles, by altering the transfer function of the palette by circular shift.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: July 7, 1998
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Dominique Coquelet, Jean-Francois Meffre, Neamen Kesks
  • Patent number: 5774418
    Abstract: An instant acoustic logging method for use in oil drilling is disclosed in which a drill bit arranged at one end of a drill string and rotated in a well is used as the acoustic source. The method comprises the steps of measuring, at the top of the string, the vibration generated therein by the rotating drill bit, sensing acoustic signals from the drill bit at least one point on the ground away from said drill bit, and processing the signals to provide data on the rock around the well. The method comprises an additional preliminary step of processing the vibration measured at the top of the string to determine the nature of the pilot signals from the drill bit, the data on the rock around the well being obtained by comparing the acoustic signals sensed on the ground with the pilot signals from the drill bit.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: June 30, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Jean Magendie, Elyes Draoui
  • Patent number: 5767229
    Abstract: In a process for the preparation of organic disulphides and polysulphides by reaction of sulphur with a mercaptan or with a polysulphide of lower sulphur order in order to convert it into polysulphide of higher order, or alternatively by reaction of a mercaptan with an organic polysulphide of a high sulphur order in order to convert it into a polysulphide of lower sulphur order, in the presence of a catalyst in the form of a resin with a basic function, the resin is based on a polystyrene-divinyl benzene support functionalized with guanidine or amidine groups, and the reaction is preferably conducted in the presence of methanol.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: June 16, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Emmanuel Arretz, Frederic Lopez
  • Patent number: 5766567
    Abstract: A single-stage low temperature catalytic process for desulphurisation of a gas which contains a mixture of H.sub.2 S and SO.sub.2 which process includes feeding the gas to be treated at a temperature below the dew point of sulphur to a Claus converter having a Claus catalyst in a reaction stage in which the catalyst includes a composite catalytic mass of alumina and one or more compounds of titanium, yttrium, lanthanum or the rare-earth elements of atomic number 58 to 71, and contacting the gas with the Claus catalyst at a temperature below the dew point of sulphur, by which sulphur deposits on the Claus catalyst and the gas is desulphurised.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 16, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Robert Voirin, Andre Philippe
  • Patent number: 5764514
    Abstract: A method of modelling at least travel time and apparent dip from seismic data that has been processed by at least one migration operator comprising the steps of taking the mid-point (N.sub.1) of a source (S)/receiver (R) system, applying ray tracing to the system relative to a given reflector, processing the parameters of the ray using a migration operator to obtain a first point of arrival (N'.sub.1) marked on the model, determining the offset (.DELTA.e1), and proceeding iteratively at each new point of arrival (N'.sub.i) until the offset (.DELTA.E) is less than or equal to the predetermined offset (.DELTA.e).
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: June 9, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Bernard Raynaud, Etienne Robein
  • Patent number: 5747673
    Abstract: A containment cell with two chambers (7) in a thermostat-controlled enclosure (3) is used to measure separately, at determined pressure levels, the volumes occupied separately by fluid phases, prior to measuring at the same pressures the volume occupied by the mixture thereof, so as to deduce therefrom the excess volume (v.sup.E) and the density of the mixture. By minimizing an error function (F) that takes account of volume quantities, such as the excess volume (v.sup.E) or the density of the mixture, and of phase equilibrium data of the mixture such as the saturation pressures (Psat), these data being determined from said cell, it is possible to determine with precision the coefficients of the equation of state relating the thermodynamic parameters of the mixture (P, V, T) and thereby to fine down for example reservoir models. The method can be applied for study of petroleum fluids for example.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: May 5, 1998
    Assignees: Institut Francais du Petrole, Elf Aquitaine Production
    Inventors: Philippe Ungerer, Jean-Fabrice Arnaud
  • Patent number: 5738464
    Abstract: Curvature limiter for a pipe running in a marine environment, more specifically a pipe riser (12) running between a sub-sea oil well (14) and a support (10) on the surface (16) of the sea. The curvature limiter (26) comprises at least two elements (28) which are substantially tubular and arranged around the pipe riser (12), these elements being joined together by an interconnection (30) which serves to limit the angular separation between the elements.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: April 14, 1998
    Assignee: Elf Aquitaine Production
    Inventor: Jean-Luc Delrieu