Patents Assigned to Societe Nationale Elf Aquitaine
  • Hydrostatic syringe for depositing processing products in wells
    Patent number: 4741396
    Abstract: Equipment for depositing processing products in wells after being lowered inside production tubes for depositing cement to seal perforations in the production tube and also for depositing detergents or acid.A syringe comprises a clock mechanism which, after a given period of time and through the medium of a striker for piercing a cap which seals a pressurized oil reservoir, actuates a hydraulic bolt comprising a barrel, a piston, a fixed liner encased in a movable liner and means for maintaining the movable liner in a raised position.A central rod rigid with the movable liner traverses a syringe body, of which the filling space is provided with discharge orifices co-operating with a valve carried by the end of the central rod.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: May 3, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventor: Henri Falxa
  • Polycarbon sulphide derivatives
    Patent number: 4742127
    Abstract: Polycarbon sulphide derivatives comprise units (R.sub.x CS.sub.m).sub.n in whichR represents hydrogen, an alkali metal or a transition metal,x is the degree to which R is present in the carbon-sulphur structure,m is the degree of substitution with sulphur andn is the number of units in the polymer chain.As shown by the single FIGURE of the drawing, the insertion of R is reversible.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: May 3, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Michel Armand, Mireille Fouletier, Pierre Degott
  • Guide tube for a flexible upright riser for marine petroleum exploitation
    Patent number: 4741647
    Abstract: A stress-limiting device for a flexible riser which stress-limiting device glides in a set of guides rigidly attached to an articulated structure emplaced in the deep sea. The device includes an elastic guide tube element coaxial to the riser, with the stiffness of the guide tube increasing progressively from the top to the bottom of said guide tube, whereby the stiffness characteristic is appreciable in the lower region of the guide tube, which lower region is affixed to a structure attached to a wellhead or the like via an aligned fitting, whereby the guide tube is held in contact with the riser by the intermediary of a plurality of support mechanisms one of which includes a fitted bushing which glides in the lower, rigid part of the guide tube. The device makes it possible to shut down and resume operation of offshore wells which have been equipped for production.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: May 3, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Christian Dumazy, Francois Baduel, Jean-Paul Sarrailh
  • Polycarbon sulphide polymers
    Patent number: 4739018
    Abstract: Polycarbon sulphide derivatives comprise units (R.sub.x CS.sub.m).sub.n in whichR represents hydrogen, an alkali metal or a transition metal,x is the degree to which R is present in the carbon-sulphur structure,m is the degree of substitution with sulphur andn is the number of units in the polymer chain.As shown by the single figure of the drawing, the insertion of R is reversible.
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: April 19, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Michel Armand, Mireille Fouletier, Pierre Degott
  • Low temperature and high pressure fluid flow calorimeter
    Patent number: 4738544
    Abstract: Flow calorimeter for fluids at low temperature and at high pressure essentially and which includes an electrical energy supply and two temperature sensors disposed within the fluid. The electrical energy supply includes a very tightly wound coil occupying an entire passage section of the pipe. The temperature measurements may be carried out by platinum sensors that are positioned at a predetermined distance in the pipe from the electric energy supply. Each temperature sensor can be dismantled and replaced separately.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: April 19, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Jean-Claude Setier, Gerard Alexandre, Rene Ladesbie
  • Process of removing of COS and CS.sub.2 compounds contained in an industrial gas
    Patent number: 4735788
    Abstract: A process is provided for eliminating COS and CS.sub.2 compounds contained in an industrial gas. The gas containing an appropriate quantity of water vapor is contacted with a titanium oxide catalyst arranged in a high temperature reaction zone. The reaction is carried out while maintaining at specific values the ratio R between the number of water vapor moles and the number of moles of the compound(s) COS and CS.sub.2 in the supplied gas in contact with the catalyst, as well as the temperature at the outlet from the reaction zone. The process is applicable to the treatment of industrial gases usable in organic synthesis and containing COS and CS.sub.2 as impurities susceptible of perturbating synthesis reactions.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: April 5, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventor: Robert Voirin
  • Process and apparatus for the photochemical sulphochlorination of gaseous alkanes
    Patent number: 4735747
    Abstract: Process of preparation of sulphonyl alkane halides by the reaction between an alkane, sulphur dioxide and a halogen, in the presence of ultraviolet light in the gaseous phase; the gaseous mixture of the reactants contains at least 4 moles of SO.sub.2 per mole of hydrocarbon.
    Type: Grant
    Filed: March 12, 1986
    Date of Patent: April 5, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Jean Ollivier, Hubert Baptiste, Christian Lagaude, Michele Larrouy
  • Process for the preparation of a glass based cellular mineral and various articles made therefrom
    Patent number: 4734322
    Abstract: The invention concerns a process for the preparation of a glass based cellular mineral and also the manufacture of various articles from this material.The process is characterized in that a mixture consisting of 100 parts by weight of ground glass and 0.2 to 2 parts by weight of calcium and magnesium carbonates in a ratio of CaCO.sub.3 /MgCO.sub.3, is used, this mixture being placed into open refractory vessels, the rims of which have a minimum height of 15 cm and which are filled with said mixture to a minimum height of 6 to 12 cm and placed into a furnace with an appropriately regulated heating program.Application in the manufacture of articles based on cellular glass, the structure of which makes possible attachment to or combination with a great variety of materials.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: March 29, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventor: Claude Favre
  • Process of recovery of sulphur from minerals containing pyrites
    Patent number: 4729888
    Abstract: Production of elementary sulphur from an iron sulphide mineral, which comprises oxidizing acid lixiviation of the pulverized mineral, for extraction of the sulfur. The pulp obtained from the lixiviation is treated in the hot with an organic solvent for sulphur, the solvent having a density higher than 1, to separate this pulp into an aqueous phase containing in solution the non-ferrous metals, the sulphates of which are water soluble, and into a suspension of the solid of the pulp in an organic phase consisting of a solution of sulphur in the solvent separated by decantation and, after separation of the solid in suspension in the organic phase, the sulphur is recovered by crystallization after cooling of the organic phase.
    Type: Grant
    Filed: April 15, 1987
    Date of Patent: March 8, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventor: Didier Anglerot
  • Process and product for dissolving sulfur
    Patent number: 4728447
    Abstract: A solvent for sulfur consisting of a dialkyl disulfide which is free of any basic substance. It is obtained from a commercial dialkyl disulfide by treatment with a reagent capable of eliminating or blocking the basic substances, particularly amines, which are customarily present in such a product. This reagent may be an acid.The use of the product, after treatment in this manner, for dissolving sulfur which has deposited in the casings of natural gas wells permits the reuse several times of the dialkyl disulfide employed.
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: March 1, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventor: Yves Labat
  • Compositions for the hydration of keratinic substances substituted by alpha-amino acid sulfoxides
    Patent number: 4724140
    Abstract: Compositions for the hydration of keratinic substances constituted by amino acid sulfoxides. A particular product is methionine sulfoxide. Important application in cosmetology where these products are incorporated in aqueous and organic solutions and oily or other emulsions. These products play a hydrating role in skin application and act as a softening agent on the hair.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: February 9, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Philippe Potin, Marie-Claude Martini
  • Device for carrying out extraction-separation-cracking processes by supercritical fluids
    Patent number: 4724087
    Abstract: Separation/extraction/cracking method using a supercritical fluid in which the density of the fluid is reduced in a needle valve and directly brought into an assembly formed by a cyclonic chamber and a recovery pot and of which the walls are heated.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: February 9, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventor: Michel Perrut
  • Method and apparatus for measuring the heating power of combustible gases
    Patent number: 4720196
    Abstract: A method and apparatus for measuring the heating power of a combustible gas. The ratio of the temperature of gases entering and exiting a calorimeter is maintained substantially equal to 1, and the entering air is maintained at its water saturation limit. The calorimeter comprises two concentric cells having a central chimney closed at the top and housing a burner. A coiled tube discharges gases from the chimney. Two temperature probes transmit signals to a microprocessor which actuates a heat exchanger provided in an external wall of the outermost concentric cell.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: January 19, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Lucien Mondeil, Francois Robert
  • Apparatus for adjusting the amine load upon a column for scrubbing natural gas
    Patent number: 4717547
    Abstract: A process and apparatus for adjusting the amine load upon an absorption column for the desulfuration of gases uses a photometric cell allowing measurements of absorption to be taken, wherein the process comprises performing the said adjustment as a function of the residual content in the amine of the gas to be eliminated, the sample being drawn off in liquid phase from inside the column. The application of said process to the processing of natural acid gases is disclosed together with an embodiment of a photometer cell.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: January 5, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Georges-Michel Baritiu, Jean-Claude Gherardi, Bernard Leconte
  • Method of instantaneous acoustic logging within a wellbore
    Patent number: 4718048
    Abstract: Method of instantaneous acoustic logging within a wellbore.The method is characterized in that it consists of locating on drill-pipe and ground recordings elementary recordings corresponding to one and the same depth level of the drilling tool, in grouping these elementary recordings in pairs, then in intercorrelating said recordings of the pairs so as to produce in respect of each pair a correlated signal which is representative of the acoustic energy produced and of the difference in travel times of the waves received on sensors from which the pair of recordings has been obtained.A particular application is for the determination of a seismic wellbore profile.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: January 5, 1988
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Philippe Staron, Georges Arens, Pierre Gros
  • Drawn assembly for pulsatory combustion
    Patent number: 4708634
    Abstract: Assembly for pulsatory combustion comprising a combustion chamber, a horn and an exchanger part, made through drawing and welding of two half-shells, the separation plate being secured to the inside of the chamber in a recess provided for this purpose such an assembly being applied to domestic heating.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: November 24, 1987
    Assignees: Societe Nationale Elf Aquitaine, Mareck B.V.
    Inventor: Bernard Vergne
  • Manufacture of alkane sulphonyl chlorides
    Patent number: 4699736
    Abstract: Continuous manufacture of an alkane sulphonyl chloride by the action of chlorine on the dialkyl disulphide corresponding to the alkane, in the presence of water or an aqueous hydrochloric acid solution.Firstly, a fine emulsion of the dialkyl disulphide is prepared with water or with an aqueous hydrochloric acid solution, after which the emulsion is treated with chlorine under constant agitation.Preferably, separation of the alkane sulphonyl chloride formed is effected in two different zones, the second of which operates under reduced pressure.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: October 13, 1987
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Henri Gongora, Jacques Tournier-Lasserve
  • Method of preparing gas samples from liquids initially containing such gases
    Patent number: 4699886
    Abstract: A method is provided for continuous quantitative analysis of H.sub.2 S dissolved in crude oil. The liquid is injected into a mixing chamber 14 in the form of a microsprayed mist meeting a nitrogen stream. The mist conveyed by the nitrogen is injected in the lower unfilled part 16a of a mist separation chamber 16 filled with solid mist separation material and passes from bottom to top through said filling while giving up liquid in the form of coalesced droplets. The gas and nitrogen mixture emerging at the top 16b of chamber 16 is free of at least a large part of the least volatile constituents.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: October 13, 1987
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventor: Bernard Lelong
  • Method and apparatus for drawing a tape constituted by a support coated in a layer of semiconductor material, said tape being drawn from a liquid bath of said material
    Patent number: 4695480
    Abstract: The method consists in clamping the edges of the tape between two jaws of a clamp and in displacing the clamp vertically upwardly. The apparatus includes two vertical columns (10, 11) along which two carriages (12, 13) are capable of moving, with each carriage having a corresponding clamp (14, 15) and means (16, 17, 19, 20) for controlling clamp operation and vertical displacement of the carriages along the columns. Such semiconductor-coated material is suitable for making solar photocells, for example.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: September 22, 1987
    Assignees: Compagnie Generale d'Electricite, Societe Nationale Elf Aquitaine
    Inventor: Christian Belouet
  • Process for the preparation of linear polychlorophosphazene
    Patent number: 4693876
    Abstract: A process for preparing linear polychlorophosphazenes having a terminal --PXCl.sub.2 group, wherein X is O or S, by polycondensation of a monomer of the formula P.sub.2 NXCl.sub.5, by heating to release PXCl.sub.3 and continuing the heating after the evolution of PXCl.sub.3 has stopped. In the process, at least the heat induced polycondensation phase after evolution of PXCl.sub.3 has stopped is carried out in solution in a medium which is a solvent for both the monomer and the polymer and which is inert to the constituents of the polycondensation reaction. The process reduces the amount of cross-linking and produces high molecular weight polymers in a reproducible way.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: September 15, 1987
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Roger DeJaeger, Guy Pagniez, Philippe Potin