Patents Assigned to Elf Aquitaine
  • Patent number: 5607889
    Abstract: Process for producing an active composite consisting of a support and an active agent is disclosed. The process comprises mixing expanded graphite and an exfoliated lamellar compound, compressing the mixture to form a support which has a graphite density between 0.02 and 0.5 kg/dm.sup.3, and impregnating the support with the active agent. Such active composites are employed as reactants in thermochemical systems.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: March 4, 1997
    Assignee: Elf Aquitaine
    Inventors: Jacques Prosdocimi, Bernard Spinner
  • Patent number: 5592381
    Abstract: A device for processing and interpreting drilling data is mounted at the lower end of a drill-pipe string located in a drilling well and provided with a drill bit and, measuring assembly. The device is arranged to transmit data from the bottom to the surface, but transmits only abbreviated messages to the surface after interpreting the measurements made by the measuring assembly. A method for implementing the device while transmitting data from the bottom of a drilling well to the surface in the form of abbreviated messages after interpreting the measurements made by the measuring assembly.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: January 7, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Henry Henneuse, Elyes Draoui
  • Patent number: 5569534
    Abstract: Reactant for thermochemical systems, including a support which is, for example, recompressed expanded graphite or vermiculite, and an active agent, for example a salt. According to the invention, the support is in the form of granules of graphite having a density of between 0.20 and 0.5 g/cm.sup.3 and whose diameter lies between 0.2 cm and 2.5 cm.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: October 29, 1996
    Assignee: Elf Aquitaine
    Inventors: Benoit Lambotte, Bernard Spinner, Charles Timoney, Jacques Prosdocimi
  • Patent number: 5565624
    Abstract: Method of determining variations in the morphology of a borehole. It consists in measuring, as a function of the depth of the borehole, the dip and the azimuth (a.sub.1) of the borehole, the inside diameters of the borehole in two perpendicular directions, and the azimuth (a.sub.2) of a reference caliper and it is characterized in that consists in determining the eccentricity (e.sub.m), together with an eccentricity error (.DELTA.e.sub.m), the azimuth (a.sub.3) of the second caliper from the azimuth (a.sub.2), and the rotation speed (V.sub.R) of the reference caliper, and then comparing (.DELTA.e.sub.m) to a threshold value (.DELTA.e.sub.s) and (V.sub.R) to a threshold value (V.sub.S ) to determine the type of ovalization of the borehole.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: October 15, 1996
    Assignee: Elf Aquitaine Production
    Inventors: Renaud Deboaisne, Pascal Bauer
  • Patent number: 5555936
    Abstract: The permeability of a subterranean reservoir can be more easily controlled by first injecting a crosslinking agent solution and then subsequently injecting a scleroglucan solution to thereby form, in situ, crosslinked scleroglucan gel. This reverse order of injection allows for a more homogeneous gel propagation without substantial risk of plugging.
    Type: Grant
    Filed: March 16, 1995
    Date of Patent: September 17, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Rosangela Pirri, Jacques Gadioux, Richard Riveno
  • Patent number: 5553568
    Abstract: A method and device for cleaning a bird whose plumage has been soiled by pollution are provided, in which the bird is placed in a cage and the bird, with the exception of its head, is subjected to the action of jets of cleaning and rinsing liquid issuing from a plurality of nozzles rotating inside a tank in which said cage is placed.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: September 10, 1996
    Assignee: Elf Aquitaine
    Inventors: Bruno Verschuere, Jean-Pierre Jacques
  • Patent number: 5550761
    Abstract: A unified hydraulic model has been developed by the method according to the invention which is applicable to any slope and diameter of pipeline and can handle most of the steady state as well as transient multiphase flow regimes encountered in practice. The new modelling method differentiates two types of flow patterns: separated flow patterns (stratified or annular) and dispersed flow patterns. Intermittent flow patterns (slug, churn flow) are a combination of these two patterns. The same concept has been successfully applied for transition criteria between different flow regimes, insuring continuity of the solutions across the transitions. This requirement is very important for simulating transient phenomena. The transient resolution is achieved by an explicit time advancing scheme. The advantages of the method are; its ability to follow wave front propagation, an easy implementation for the resolution of complex pipeline networks.
    Type: Grant
    Filed: February 8, 1994
    Date of Patent: August 27, 1996
    Assignees: Institut Francais du Petrole, Total, Elf Aquitaine
    Inventors: Christian Pauchon, Gilles Ferschneider, Daniel Ferre
  • Patent number: 5540087
    Abstract: Apparatus for measuring thermodynamic characteristics of a hydrocarbon sample, comprising at least one measurement cell (12; 14) intended to be selectively connected to a gas gauge (82); the gas gauge being capable of being selectively connected to a gas recovery assembly (98) and a liquid storage assembly (114), the measurement cell (12; 14) comprising a piston/cylinder assembly (16; 20; 18; 22), the piston being movable in the cylinder under the action of a jack (24; 26).
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: July 30, 1996
    Assignee: Elf Aquitaine Production
    Inventors: Jacques Bickert, Karim Chaouche, Marcel Royer, Jose Sanchez
  • Patent number: 5540277
    Abstract: The invention relates to a method for improving heat and mass transfers to and/or through a wall, and if need be, to such a method applied to a permeable wall. The invention also concerns a wall and conductive material pair having improved heat and mass transfer characteristics. The method of the invention is useful for all techniques requiring both heat transfer and flow of gaseous phase to or through a wall.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: July 30, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Jean-Paul Gourlia, Isidore Jacubowiez
  • Patent number: 5538867
    Abstract: The present invention relates to a process for the electrochemical regeneration of pyridine cofactors.The process of the invention is characterized by the use, in a reaction medium subjected to electrolysis, of a cytoplasmic hydrogenase enzyme.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: July 23, 1996
    Assignee: ELF Aquitaine
    Inventors: Helene Durliat, Maurice Comtat, Jean-Luis Seris
  • Patent number: 5534239
    Abstract: Process for the synthesis of a silica-enriched crystalline aluminosilicate having the offretite structure from a nucleation gel A containing sources of silicon, aluminium, alkali metal ions, an organic structuring agent and water and a growth gel B containing sources of silicon, aluminium, alkali metal ions and water. The crystals formed are calcined, the ions are replaced by protons and the crystals are subjected to a hydrothermal treatment followed by a treatment with a strong mineral acid. The aluminosilicate formed has a good selectivity in acid catalysis reactions and is characterized by its good stability.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: July 9, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Francois Fajula, Joel Patarin, Thierry Des Courieres, Fredj Fitoussi
  • Patent number: 5532977
    Abstract: A method and device for obtaining a zero-offset seismic section from a stack seismic section produced from stack traces recorded along a given line of survey, is disclosed.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: July 2, 1996
    Assignee: Elf Aquitaine Production
    Inventor: Pierre Thore
  • Patent number: 5525587
    Abstract: The present inventors found that the addition of scleroglucan, in particular of unrefined scleroglucan, to the water employed as drilling fluid for drilling wells requiring a high flow rate made it possible to limit formation leaching and improved the removal of cuttings.The invention may be applied to drilling of large-diameter wells.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: June 11, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Alain Ladret, Alain Donche
  • Patent number: 5523493
    Abstract: The invention concerns a process for the synthesis of at least one alkyl tertiobutyl ether, preferably respectively MTBE or ETBE, from at least one alcohol and from isobutene, each synthesized at least partially from natural gas. The alcohol, preferably methanol or ethanol respectively, is synthesized at least partially from synthesis gas, a portion of said synthesis gas being prepared in natural gas steam prereforming zone. The isobutene is synthesized in a series of processes which includes direct transformation of natural gas to ethylene, known as oxidative coupling of methane (OCM), dimerization of ethylene to normal butene, isomerization of n-butene to isobutene, and the separation units associated therewith.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: June 4, 1996
    Assignees: Institut Francais Du Petrole, Elf Aquitaine Production
    Inventors: Charles Cameron, Patrick Chaumette, Quang Dang Vu, Jacques Bousquet, Jacquos Tournier-Lasserve, Guy Desgrandchamps
  • Patent number: 5522976
    Abstract: The target element (2) is formed from an inorganic compound layer (16) with a melting point above 300.degree. C. deposited on a foam or metallic felt support layer such that the layer of inorganic compound sinks to part of its depth into the support layer to define a composite layer (17). In order to form the target element, a precursor system of the inorganic compound is applied to the support layer, the assembly so formed is subjected to a pressure of between 0.1 MPa and 15 MPa, the resulting assembly is maintained at between 300.degree. C. and 1600.degree. C. and below the melting temperature of the support in order to obtain a sintered assembly. Said assembly is than cooled to an ambient temperature avoiding any sudden cooling. In order to produce the target, the element (2) is glued to a metallic substrate (4) using a conductive adhesive.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: June 4, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Guy Campet, Jean-Michel Chabagno, Claude Delmas, Joseph Portier, Jean Salardenne
  • Patent number: 5508013
    Abstract: A process is provided for the production of sulphur from at least one sour gas containing H.sub.2 S and a gaseous or liquid fuel effluent, of the type comprising a thermal reaction step, wherein the thermal reaction step is conducted by performing the combustion of the gaseous or liquid fuel effluent in a first zone of the thermal reaction stage with a quantity of a gas containing free oxygen in excess in relation to the theoretical quantity needed for a complete combustion of the fuel effluent, the excess being smaller than the theoretical proportion of gas containing free oxygen needed to oxidize to SO.sub.2 approximately one third of the H.sub.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: April 16, 1996
    Assignee: Elf Aquitaine Production
    Inventors: Georges Kvasnikoff, Jean Nougayrede, Andre Philippe
  • Patent number: 5507158
    Abstract: A device for indirect cold production for a compression, absorption, adsorption or chemical refrigerating system comprises an evaporator in heat exchange relationship with the fluid to be cooled in one or more condensers, themselves in direct heat exchange relationship with the evaporator or the refrigeration circuit reactor, circulation between the evaporator and the condenser being established by gravity flow using a phase change fluid and separate vapour and liquid pipes.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: April 16, 1996
    Assignee: Elf Aquitaine
    Inventor: Jacques Bernier
  • Patent number: 5507897
    Abstract: A target element is formed by creating a precursor system which may yield an inorganic material at a temperature of 300-1600 C. which is lower than the melting point of said material. The precursor system contains an inorganic additive having a melting point no higher than. The precursor system is applied to a support other than a foam or metal felt, the resulting assembly is heated to said temperature and this temperature is maintained for a sufficient time to produce said inorganic material, whereafter the assembly formed by the inorganic material and the support is gradually cooled to room temperature. To produce the target, the target element (2) is bonded to a metal substrate (4) by means of a layer (3) of conductive adhesive.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: April 16, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Guy Campet, Maurice Bourrel, Claude Delmas, Joesph Portier, Jean Salardenne
  • Patent number: 5493996
    Abstract: A method and device for cleaning a bird whose plumage has been soiled by pollution are provided, in which the bird is placed in a cage and the bird, with the exception of its head, is subjected to the action of jets of cleaning and rinsing liquid issuing from a plurality of nozzles rotating inside a tank in which said cage is placed.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: February 27, 1996
    Assignee: Elf Aquitaine
    Inventors: Bruno Verschuere, Jean-Pierre Jacques
  • Patent number: 5494650
    Abstract: A process is provided for the improvement of the sulphur yield of an assembly which produces sulphur from H.sub.2 S and which consists of a sulphur plant (1), an oxidation and hydrolysis unit (2) and a purification unit (3). The sulphur plant in producing sulphur provides a residual gas which incorporates H.sub.2 O, COS and/or CS.sub.2 and H.sub.2 S and SO.sub.2 in a mol ratio of H.sub.2 S:SO.sub.2 >2:1. The residual gas passes into the hydrolysis unit on a H.sub.2 S oxidation and COS and CS.sub.2 hydrolysis catalyst which functions between 180.degree. C. and 700.degree. C., in the presence of air, thus producing a residual gas free of COS and CS and incorporating H.sub.2 S and SO.sub.2 in a mol ratio which is kept equal to 2:1 by regulating the air flow. The residual gas is introduced into the purification unit in which H.sub.2 S and SO.sub.2 are made to react in order to produce sulphur and to obtain a purified residual gas.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: February 27, 1996
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Georges Kvasnikoff, Jean Nougayrede, Andre Philippe