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| Number | Title | Issue Date |
| 5494650 | Process for improving the sulphur yield of a complex for producing sulphur from a sour gas containing H2 S, the said complex comprising a sulphur plant and then an oxidation and hydrolysis unit followed by a purification unit A process is provided for the improvement of the sulphur yield of an assembly which produces sulphur from H2 S and which consists of a sulphur plant (1), an oxidation and hydrolysis unit (2) and a purification unit (3). The sulphur plant in pro... | 02/27/1996 |
| 5465323 | Method for modelling a surface and device for implementing same A method for obtaining a model of a surface including the steps of obtaining measurements of geometrical data concerning specific points on the surface, making a grid of the surface, with the grid passing through said points, memorizing, at an address whi... | 11/07/1995 |
| 5458751 | Recovery of aprotic polar solvents from their saline aqueous solutions The invention relates to recovery of an aprotic polar solvent from a saline aqueous solution of this solvent, by a process which consists in desalting the said solution by electrodialysis then in distilling the desalted solution. To avoid precipitation of... | 10/17/1995 |
| 5347859 | Dynamometric measuring device for a drill pipe A dynamometric measuring device for a drill pipe which includes, firmly attached to the rotating pipe, sensors disposed in a groove on the pipe and electronics for conditioning the signals supplied by the sensors. The measurement signals are transmitted b... | 09/20/1994 |
| 5298156 | Simultaneous decarbonation and gasoline stripping of hydrocarbons Process for the simultaneous decarbonation and gasoline stripping of a gaseous mixture at an absolute pressure higher than 0.5 MPa containing methane, C2 and higher hydrocarbons and CO2 in which a demethanized rich solvent is regener... | 03/29/1994 |
| 5289354 | Method for acoustic transmission of drilling data from a well A method for transmitting data from the bottom of a well to the surface is disclosed. The method includes measuring data indicative of at least one drilling condition at the bottom of a well, transmitting into a stream of drilling mud injected into a well... | 02/22/1994 |
| 5277061 | Method for determining the rotation speed of a drill bit A method for determining the rotation speed of the drill bit arranged at one end of a rotating drill string. According to the method, the axial acceleration at one point on the drill string is measured, this measurement is processed with a multiplying coe... | 01/11/1994 |
| 5268994 | Method of plotting surfaces in a 3D volume A method for plotting the surfaces in a 3D volume configured in the form of columns distributed over the nodes of a grid with the aid of 2D plotting algorithms by classifying the columns by way of a Peano-Hilbert curve.... | 12/07/1993 |
| 5259958 | Hydrocarbon extractor A hydrocarbon extractor, intended to be disposed above a tank (10) containing a mixture of a liquid and a liquid hydrocarbon, comprises a belt (16) made of an oleophilic material which is adapted to be immersed in the mixture and two oleophilic rollers (2... | 11/09/1993 |
| 5245871 | Process for controlling a drilling operation Method for conducting an oil drilling operation, during which a drill-stem produces the rotation of a tool in an oil well. The method consists of the following steps: continually measuring the rotational speed of the upper end of the drill-stem; continuou... | 09/21/1993 |
| 5233304 | Electromagnetic source integrated into an element of a well casing Electromagnetic source intended to be placed permanently in a drill well for studying the electromagnetic properties of the geological formations or of the fluids surrounding the well. This source consists of a coil through which a high current is circula... | 08/03/1993 |
| 5217071 | Production tube with integrated hydraulic line A production tube which includes at least one substantially tubular tube element and a hydraulic line. The tube element is provided with a longitudinal groove for receiving the hydraulic line.... | 06/08/1993 |
| 5213162 | Submarine wellhead A submarine wellhead (10) for producing wells, including a hollow body (14) mounted in a water-tight fashion on a well (16) configured to receive a suspension device (30) equipped with a production column (26) designed to be lowered down into the well, wh... | 05/25/1993 |
| 5179518 | Method of processing seismic reflection data in order to obtain improved seismic sections A method of processing seismic recordings in order to obtain an improved seismic section by taking into account, during summing, the real geometric configuration of the alignments of signals in the collection of elementary recordings before sum.... | 01/12/1993 |
| 5173022 | Process for pumping a gas/liquid mixture in an oil extraction well and device for implementing the process The present invention relates to a process for pumping a two-phase gas/liquid mixture in an extraction well (11) whose initial gas percentage is greater than approximately 40% by volume, characterized in that it consists: in reducing the percentage of fre... | 12/22/1992 |
| 5166362 | Process for the manufacture of thiophene The invention relates to the manufacture of thiophene by catalytic dehydrogenation of tetrahydrothiophene. Ruthenium sulphide, optionally mixed with sulphides of one or more other transition metals is employed as bulk or supported catalyst.... | 11/24/1992 |
| 5159112 | Process of the production of alkanesulfonamides A process for the preparation of alkanesulfonamides is disclosed. It comprises reacting an alkanesulfonyl chloride with ammonia or with an alkylamine in the presence of a chemically inert liquid diluent. The diluent is first supersaturated with ammonia or... | 10/27/1992 |
| 5158140 | Apparatus and method for cleaning out an underground well Method has been provided for cleaning a vertical, deviated or horizontal underground well. In which a maintenance tubing having a cleaning head at its end is lowered into a production pipe for suction of sediments. At a certain level above the region of t... | 10/27/1992 |
| 5144298 | Dynamometric measuring assembly for a drill pipe equipped with means of radiotransmission Dynamometric measuring assembly for a drill pipe, formed by a measuring device comprising, firmly attached to the rotating pipe, sensors and a first electronic circuit for conditioning the signals supplied by these sensors, a radiotransmitter mounted in a... | 09/01/1992 |
| 5141061 | Method and equipment for drilling control by vibration analysis Device for the auditory and/or visual representation of mechanical phenomena in the interaction between a drilling tool and rock being drilled, characterized by the fact that it includes a mechanism for picking up a vibratory signal representing the vibra... | 08/25/1992 |
| 5133949 | Process and device for the removal of H2 S Process for removing hydrogen sulfide at low concentration in a gas containing water vapor. The gas is cooled to a temperature below the dew point of water, which condenses and separates the water. The dry gas is scrubbed free of hydrogen sulfide by an H | 07/28/1992 |
| 5132098 | Process for removing sulphur compounds contained in a residual gas Process for removing sulfur compounds contained in a residual gas with recovery of said compounds in the form of sulfur, wherein a gas obtained from a residual gas containing Hs S and SO2 and having a temperature lower than 160° C. ... | 07/21/1992 |
| 5121793 | Capping equipment for blowout well Device for blocking off a well in open flow which includes a blocking system (4) for blocking off the well, an anchorage system (3) to support said blocking system (4) and a movable and inclinable support and positioning system (5) which comprises a slidi... | 06/16/1992 |
| 5120449 | Treatment of aqueous drilling mud effluents containing lignosulfonates Method for treating drilling effluents containing ligno-sulfonates wherein, successively, sulfuric acid is injected in order to cause coagulation, a cationic polyelectrolyte is injected to cause a flocculation and solids are separated from the liquid by c... | 06/09/1992 |
| 5113019 | Process for phenol alkylthiolation and its application to the synthesis of 4-acyl-2-alkylthiophenols The invention relates to the preparation of alkylthiophenols by reaction of a dialkyl disulphide with a phenol. In the process according to the invention, the reaction is carried out in the presence of aluminum chloride or of ferric chloride in a solvent of ... | 05/12/1992 |
| 5095138 | Continuous synthesis of mercaptocarboxylic acid esters The invention relates to production of esters of mercaptocarboxylic acids and alcohols forming an azeotrope with water. The esterification is carried out continuously in the presence of an excess of alcohol and the water formed is removed by entraining azeotro... | 03/10/1992 |
| 5087759 | Synthesis of vicinal alkanedithiols The invention relates to the manufacture of vicinal alkanedithiols from the corresponding alkylene trithiocarbonates. The method according to the invention consists in treating alkylene trithiocarbonate with an alkaline sulfide, followed by acidification of ... | 02/11/1992 |
| 5068445 | Process for the preparation of organic disulphides and polysulphides The invention relates to the preparation of organic disulphides and polysulphides by the action of sulphur on a mercaptan or on a polysulphide which is lower in sulphur, in the presence of a basic catalyst. In the process according to the invention, an anion e... | 11/26/1991 |
| 5065421 | Device for measuring fluid flows through a porous body Device for measuring by gammagraphy fluid flows, in particular in drilling cores of porous media originating from oil fields, said device being used under field conditions. The device comprises a tubular body, the outer part of which is permeable to radia... | 11/12/1991 |
| 5030438 | Catalytic removal of hydrogen sulfides from liquid sulfur The invention is a catalytic process for removing H2 S and hydrogen polysulfides from liquid sulfur. The process comprises mixing a heterocyclic compound with the liquid sulfur and removing the hydrogen sulfide from the liquid sulfur by contact... | 07/09/1991 |
| 5024110 | Cell for sampling and storing fluid deposits The rear face of the piston (7) and the corresponding inner face of the pump body (1,2,3,4) are complementarily shaped so as to make the volume of the rear chamber (31) of the cell as small as possible, and, when the cell is in the storing position, the u... | 06/18/1991 |
| 5016710 | Method of assisted production of an effluent to be produced contained in a geological formation The present invention provides a system and method for producing an effluent contained in a geological formation forming a reservoir for said effluent or producing formation, including a central well, at least one subhorizontal drain as well as a displaci... | 05/21/1991 |
| 5004591 | Catalytic process for removal of hydrogen sulfides from liquid sulfur The invention is an improved catalytic process for removing H2 S and sulfanes from liquid sulfur and a catalyst system for carrying out the process. The catalyst comprises a basic component and a surfactant component.... | 04/02/1991 |
| 5001271 | Synthesis of benzyl mercaptan This invention relates to the preparation of benzyl mercaptan by reacting benzyl chloride and ammonium sulfhydrate. In the process according to the invention, the reaction is carried out under autogenous pressure in a closed reactor in two steps. The first ... | 03/19/1991 |
| 5001269 | Process for the production of lower dialkyl disulphides The invention relates to the production of dialkyl disulphides of the R-SS-R type where R represents an alkyl radical having from 1 to 3 carbon atoms, by oxidation of the corresponding alkyl mercaptan R--SH by sulphur in the presence of a catalyst. A comb... | 03/19/1991 |
| 4986902 | Chlorination system for a water to be treated A system for chlorination of a fluid to be treated, which includes a container containing trichlorocyanuric acid in a solid and compact form, a first pipe for supplying the container with dissolving fluid, an evacuation pipe in which the chlorinated fluid... | 01/22/1991 |
| 4985586 | Process for the preparation of mercaptoalcohols This invention relates to improvement to a process for the preparation of mercaptoalcohols containing, more particularly, up to 24 carbon atoms and, preferably, more than 3 carbon atoms, by reaction of the corresponding vicinal epoxides with hydrogen sulp... | 01/15/1991 |
| 4982794 | Apparatus for oil/gas separation at an underwater well-head The installation combines with at least one production well-head an oil/gas separator of substantial vertical elongation and of which the major part may be housed in a pit sunk and lined closed to the working well, which permits of wide fluctuations in th... | 01/08/1991 |
| 4980146 | Process for removing sulphur compounds contained in a residual gas Process for removing sulfur compounds contained in a residual gas with recovery of said compounds in the form of sulfur, wherein a gas obtained from a residual gas containing H2 S and SO2 and having a temperature lower than 160° C. ... | 12/25/1990 |
| 4943662 | Process for preparation of dithiols The invention relates to the synthesis of dithiols and more particularly that of ,ω-dithiols having 5 to 20 carbon atoms. The process according to the invention comprises reacting a di-(tertiary-alkylthio)alkane with hydrogen sulphide in the presence o... | 07/24/1990 |
