EP0178962A1 - Method and apparatus for the compression and transportation of a gas comprising a liquid fraction - Google Patents

Method and apparatus for the compression and transportation of a gas comprising a liquid fraction Download PDF

Info

Publication number
EP0178962A1
EP0178962A1 EP85401735A EP85401735A EP0178962A1 EP 0178962 A1 EP0178962 A1 EP 0178962A1 EP 85401735 A EP85401735 A EP 85401735A EP 85401735 A EP85401735 A EP 85401735A EP 0178962 A1 EP0178962 A1 EP 0178962A1
Authority
EP
European Patent Office
Prior art keywords
gas
compressor
liquid
phase
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85401735A
Other languages
German (de)
French (fr)
Other versions
EP0178962B1 (en
Inventor
Alexandre Rojey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of EP0178962A1 publication Critical patent/EP0178962A1/en
Application granted granted Critical
Publication of EP0178962B1 publication Critical patent/EP0178962B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/36—Underwater separating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0686—Units comprising pumps and their driving means the pump being electrically driven specially adapted for submerged use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/005—Pipe-line systems for a two-phase gas-liquid flow

Definitions

  • the present invention relates to a method and a device for transporting a gas containing a liquid hydrocarbon fraction.
  • the present invention can be applied to the production of natural gas.
  • the production of natural gas according to the prior art requires a set of operations to make it transportable: separation of the liquid fractions, dehydration to avoid the formation of hydrates and reduce the problems of corrosion, deacidification when the acid gas content of the gas natural is relatively high, compression in order to compensate for the pressure losses linked to transport through a pipe over a long distance.
  • the separation of the liquid hydrocarbon fraction is carried out in a series of settling tanks operating at increasingly low pressure levels so as to obtain a liquid fraction stable at atmospheric pressure.
  • the gas fractions successively obtained must be recompressed in different compression plants to obtain a single gas fraction at the initial pressure.
  • the natural gas When the acid gas content is relatively high, the natural gas must then be deacidified by means of an absorption process with a solvent which can be for example an amine. Such a process requires an absorption column and a regeneration column. Natural gas must be dehydrated, for example by means of an absorption process with a solvent which maybe glycol. Such a process also requires an absorption column and a regeneration column.
  • a cooling step at low temperature by means of a refrigerating machine may be necessary to ensure a more complete elimination of the heavy fraction contained in the gas which risks condensing during transport by the retrograde condensation mechanism.
  • the present invention relates to a method of compression and transport to a gas containing a liquid hydrocarbon fraction.
  • This process is characterized in that it comprises in combination the following steps: a) introduction into said gas of a liquid fraction comprising a polar solvent, b) transfer of said gas to a compressor, c) compression of said gas in said compressor and recovery at least in. part of the liquid fraction contained in said gas during the same step, d) reintroduction of at least part of the liquid fraction recovered in step c) in the compressed gas, the remaining fraction being recycled at a point in upstream of said compressor, and e) transport of said compressed gas resulting from step d) to a reception site, step a) being able to be carried out before or after step c).
  • the compressor may comprise a rotor rotating continuously in a hollow casing, the liquid fraction contained in the gas admitted into the compressor being at least partly centrifuged at the internal periphery of the rotor during the compression step c) and recovers said liquid fraction at least in part at the internal periphery of the rotor during this same step c).
  • the method according to the invention may include an additional step f) comprising the separation on the reception site of said gas into three phases formed by a gaseous hydrocarbon phase, a liquid hydrocarbon phase and a solvent phase, the regeneration of at least part of the solvent phase by separating an aqueous fraction and pumping the solvent phase to recycle it at a point upstream of the compressor.
  • the liquid fraction introduced into the gas stream may be homogeneously dispersed into droplets, for the most part less than 2 mm in diameter. This homogeneous dispersion of the liquid fraction can be carried out during step a) using a static mixer, propeller or packing.
  • the solvent phase may in particular be an alcohol such as methanol.
  • the liquid fraction contained in the gas to be compressed and which is recovered at the periphery of the rotor can ensure sealing between the rotor and the casing.
  • the compressor K may be a screw compressor possibly of the single screw type, a liquid ring compressor or a centrifugal compressor.
  • the flow rate of the liquid fraction collected at the outlet of the compressor can be recycled to the inlet of the compressor and controlled so as to represent 2 to 20% of the gas flow rate under the discharge conditions.
  • the compressor comprises several compression stages, the effluent leaving one stage being sent to the inlet of the following stage.
  • the ratio of the volume flow rate of liquid to the volume flow rate of gas under the discharge conditions of the compressor K will preferably be less than 50%, just as it may be less than 10%.
  • the method according to the present invention can be applied to the production of gas at sea by means of subsea well heads.
  • the transfer to the surface can be done by flexible pipes.
  • the compression and recovery step of at least part of the liquid phase c) may be carried out on a fixed or floating platform.
  • the present invention also relates to the device for transporting a gas containing a liquid hydrocarbon fraction.
  • This device is characterized in that it comprises in combination an inlet line of said gas to be transported connecting the gas source to means for compressing and separating the liquid phase and the gaseous phase, these means comprising an orifice for outlet from the gas phase and an outlet for the liquid phase, a line for introducing a solvent connecting a source of solvent to the inlet line and at least one transport line connected to the outlet for the gas phase.
  • the device according to the invention may include a line of single recirculation of the liquid phase produced by the compression and separation means, this line connecting the outlet orifice of the liquid phase to the finish line.
  • the device according to the invention may include a line for reintroducing the liquid phase, this line connecting the outlet port of the liquid phase to the transport line.
  • the device according to the invention may comprise upstream unique compression and separation means a mixing device.
  • the natural gas leaves the production well under pressure via the pipe or line 1. It then contains a heavy fraction of liquid hydrocarbon capable of condensing during one of the treatment and transport stages. It is then mixed with a liquid fraction comprising a polar solvent S following via line or line 2. The resulting mixture is transferred to a compressor K through line or line 3.
  • a device M intended to obtain a homogeneous dipersion of the liquid contained in the gas.
  • This device is preferably static and can be constituted, for example, by a mixer of the padded mixer type, or by a mixer of the propeller mixer type.
  • the mixture leaves the device M via the conduit or line 4 and is admitted into the compressor K.
  • the compression is advantageously carried out by a compressor comprising a rotor rotating continuously in a hollow casing.
  • the liquid phase is thus mainly collected at the periphery of the rotor, then continuously evacuated, so as to avoid pulsed operation of the compressor which would lead to its deterioration. At least part of this liquid phase is reintroduced into the compressed gas (line 5 of the diagram in FIG. 1).
  • the compressed mixture obtained is transported in two-phase flow in the pipe or line 7 to a reception site.
  • the process is characterized in that it comprises in combination the following stages: a) introduction into the gas coming from the well of a liquid fraction comprising a polar solvent S, b) transfer of the resulting effluent to a compressor K , c) compression of said gas in compressor K and recovery of at least part of the liquid fraction contained in the gas, d) reintroduction of at least part of the liquid fraction collected in step c) in the gas compressed, the remaining fraction being recycled at a point upstream of said compressor, and e) transport of the compressed effluent resulting from step d) to a reception site.
  • Step a) which relates to the introduction of the polar solvent can be carried out before or after step c). However, it is best to do it before this step.
  • the process generally comprises an additional step f) of separation on the receiving site of the effluent transported in three phases formed by a gaseous hydrocarbon phase, a liquid hydrocarbon phase and a solvent phase, and regenerating at least part of the solvent phase by separating an aqueous fraction to be pumped out the solvent phase in order to recycle it in step a).
  • Regeneration of the solvent phase is necessary to avoid excessive accumulation of water in said solvent phase.
  • the water content of the solvent phase would tend to increase indefinitely without a steady state being able to be established.
  • this regeneration may not be necessary in the case of a natural gas with a low content of water and acid gases.
  • it is generally not essential to regenerate the entire flow of solvent and the regeneration may relate only to a fraction of this flow of, for example, between 5 and 30%.
  • the various known methods for regenerating the solvent phase can be used. This regeneration can be carried out in one or more stages.
  • the gas separated from the liquid solvent phase can entrain solvent in the vapor phase.
  • This entrainment of solvent in the vapor phase corresponds to a consumption which must be compensated by an addition.
  • the entrainment of solvent in the solvent phase can be reduced by the various known methods, in particular by refrigerating the gas.
  • step f) The various operations in step f) are normally carried out at the receiving site. In some cases step f) can be carried out in whole or in part before the transport step to facilitate the transport step.
  • the solvent S can consist of different polar solvents and can be, for example, an alcohol, a ketone, an aldehyde, an ether. Mixtures of solvents can also be used.
  • the solvent is preferably of the alcohol type.
  • Methanol is particularly suitable because of the high solubility of water in methanol and the low viscosity of methanol which makes it possible to limit the pressure drops during the transport stages.
  • Different glycols can also be used, such as for example diethylene glycol, triethylene glycol or dimethyl ether tetraethylene glycol.
  • the heaviest hydrocarbons contained in natural gas and in particular those which are present in the liquid phase are partially soluble in the solvent phase.
  • the dissolution of water reduces this solubility and after injection of the solvent, the liquid fraction contained in the gas is generally formed of two phases.
  • said liquid fraction is preferably dispersed homogeneously into droplets, for the most part less than 2 mm in diameter. This makes it possible to avoid localized and asymmetrical mechanical forces on the compressor rotor, due to the impact of relatively large liquid masses, which are detrimental to the life of the compressor.
  • This homogeneous dispersion is preferably obtained using a static mixer: this static mixer can be formed by a packing or a propeller. It can include one or more elements which can be offset in rotation to promote turbulence. Other dispersion methods can also be implemented, such as for example those which use a rotary agitator.
  • the liquid fraction When the liquid fraction comprises two phases, it then forms a homogeneous emulsion which is itself dispersed in droplets.
  • the liquid fraction can then be sent to the compressor if a compressor is used which has a rotor rotating continuously in a hollow casing, in which the liquid fraction contained in the gas admitted into the compressor is at least partially centrifuged at the internal periphery of the rotor during the compression step c) and provided that said liquid fraction is collected at least in part at the internal periphery of the rotor during this same step c). It has been discovered that the compressor thus ensures, in addition to its compression function, a function of separation of the liquid phase.
  • the liquid fraction thus collected at the periphery of the rotor can provide a sealing function between the compressor rotor and the interior of the casing.
  • the liquid fraction contained in the gas represents a relatively low volume flow rate, it may be necessary to recirculate part of the liquid collected at the outlet of the compressor. It is then advantageous to cool this flow of liquid which recirculates to reduce the compression work as well as the discharge temperature.
  • the compressor K can thus be a screw compressor.
  • the implementation in the process according to the invention of such a compressor is illustrated by the diagram in FIG. 2.
  • the mixture to be compressed arrives in the compressor through line 20.
  • the liquid fraction is centrifuged by the rotation of the rotor and ensures sealing between the rotor and the inside of the casing.
  • the liquid fraction collected at the periphery of the rotor is discharged through the groove 21b and the pipe 21.
  • a part of this liquid fraction is recycled to the inlet of the compressor through the pipe 22 by means of the pump P10 incorporated in the compressor.
  • the remaining fraction of liquid is recombined with the compressed gas through line 22a.
  • the effluent thus formed is discharged through line 23.
  • twin-screw compressor in which the gas is compressed by meshing with a driving screw and a driven screw
  • single-screw compressor in which the gas is compressed by meshing a driving screw and two satellite wheels.
  • the single-screw compressor has the advantage of being able to be more easily adapted to operation at high pressure, because the rotor is subjected to better balanced stresses and does not undergo a significant radial thrust even at high discharge pressures.
  • the single-screw compressor therefore constitutes in the application of the method according to the invention a preferred version of the screw compressor.
  • the compressor K can also be constituted by a liquid ring compressor, the operation of which is shown diagrammatically in FIG. 3.
  • the gas containing the liquid fraction arrives in the compressor through the intake orifices 30 and 31. It is then trapped between blades of the rotor 32 which rotates continuously. The liquid contained in the gas is collected at the internal periphery of the casing by forming a liquid ring. When the rotation of the rotor brings the gas trapped between the blades near the discharge orifices 33 and 34, the edge of the liquid ring approaches the axis of the rotor due to the internal shape of the casing and the gas is found compressed.
  • part of the liquid contained in the gas is evacuated with the compressed gas and part is recycled to the inlet of the compressor.
  • the liquid fraction contained in the gas arriving in the compressor serves to ensure a sealing function between the rotor and the casing.
  • the flow rate of liquid fraction initially contained in the gas is relatively low, the flow rate of the liquid fraction collected at the outlet of the compressor K which is recycled to the inlet of the compressor must be controlled so as to preferably represent 2 to 20% of the flow of; gas under discharge conditions.
  • the liquid ring compressor is preferably used when the compression ratio to be obtained is low.
  • the screw compressor and the liquid ring compressor are not the only ones that can be used.
  • the centrifugal compressor can also be used, provided that the liquid phase centrifuged by rotation of the rotor can be collected at the internal periphery of the casing.
  • the present invention provides on the unique means of compression and separation at least one orifice for recovering the liquid phase.
  • the compression and separation step c) of the process can be carried out using several stages of single compression and separation means, the mixture of the liquid and gaseous phases leaving a stage being sent to the entry of the stage. following.
  • the method according to the invention makes it possible to compress and transport a natural gas containing variable liquid fractions, but it is preferably applied to cases where the quantity of liquid entrained by the gas represents a flow rate in volume of less than 50% of the total volume flow of two-phase mixture under the discharge conditions of the compressor (GOR, volume of gas over volume of liquid, greater than 1 under the conditions of refueling of the compressor) and more particularly in the case where the quantity of liquid entrained represents a flow in volume less than 10% of the total volume flow under the discharge conditions (GOR greater than 9 in the discharge conditions).
  • GOR volume of gas over volume of liquid, greater than 1 under the conditions of refueling of the compressor
  • the process is particularly advantageous in the case of gas production at sea.
  • a first implementation version of the method according to the invention consists in producing natural gas at sea by means of underwater well heads and in transferring it to the surface, for example by flexible pipes, l compression step c) being carried out on a fixed or floating platform.
  • the implementation of the method makes it possible to eliminate the various operations of separation of the liquid fractions, of recompression of the gaseous fractions obtained by successive expansion of the liquid fractions, of dehydration and of compression and thus considerably reducing the weight and the bulk of the installations placed on the platform.
  • a second implementation version of the process according to the invention consists in carrying out all of the steps a) to d) of the process underwater.
  • the compressor K must then be placed underwater in a sealed box. It is supplied with energy by an underwater electric cable and controlled by remote control.
  • the gas is produced by an underwater production station 40 comprising six well heads. Through the conduit 41 is brought the solvent which is injected into the gas.
  • the electrical supply is carried out by line 42.
  • the gas produced is collected in a collector and evacuated by line 44 by which it is sent to compressor K.
  • the compressor K is supplied with electrical energy by line 43.
  • the mixture Compressed two-phase is evacuated via line 45 to be transported in two-phase flow to a receiving station (not shown) which can be oleated on the ground.

Abstract

Le procédé comprend l'introduction d'un solvant dans le gaz provenant du puits, la formation d'une dispersion homogène, la compression du mélange resultant, la separation au moins partielle dans le compresseur de la fraction liquide contenue dans le gaz et le transport du mélange comprimé. Le procédé est particuliérement adapté à la production de gaz en mer et peut être réalisé entiérement sous la mer.The method includes introducing a solvent into the gas from the well, forming a homogeneous dispersion, compressing the resulting mixture, at least partially separating the liquid fraction contained in the gas in the compressor and transporting of the compressed mixture. The process is particularly suitable for the production of gas at sea and can be carried out entirely under the sea.

Description

La présente invention concerne un procédé et un dispositif permettant le transport d'un gaz contenant une fraction liquide d'hydrocarbure. La présente invention peut être appliquée à la production de gaz naturel. La production de gaz naturel selon l'art antérieur requiert un ensemble d'opérations pour le rendre transportable : séparation des fractions liquides, déshydratation pour éviter la formation d'hydrates et réduire les problèmes de corrosion, désacidification lorsque la teneur en gaz acides du gaz naturel est relativement élevée, compression en vue de compenser les pertes de charge liées au transport à travers une conduite sur une longue distance.The present invention relates to a method and a device for transporting a gas containing a liquid hydrocarbon fraction. The present invention can be applied to the production of natural gas. The production of natural gas according to the prior art requires a set of operations to make it transportable: separation of the liquid fractions, dehydration to avoid the formation of hydrates and reduce the problems of corrosion, deacidification when the acid gas content of the gas natural is relatively high, compression in order to compensate for the pressure losses linked to transport through a pipe over a long distance.

L'ensemble de ces opérations nécessite des équipements coûteux, lourds et encombrants.All of these operations require expensive, heavy and bulky equipment.

La séparation de la fraction liquide d'hydrocarbure est effectuée dans une série de ballons décanteurs opérant à des niveaux de pression de plus en plus bas de manière à obtenir une fraction liquide stable à la pression atmosphérique. Les fractions gazeuses successivement obtenues doivent être recomprimées dans différentes installations de compression pour obtenir une fraction gazeuse unique à la pression initiale. Lorsque la teneur en gaz acide est relativement élevée, le gaz naturel doit être alors désacidifié au moyen d'un procédé d'absorption avec un solvant qui peut être par exemple une amine. Un tel procédé nécessite une colonne d'absorption et une colonne de régénération. Le gaz naturel doit être déshydraté, par exemple au moyen d'un procédé d'absorption avec un solvant qui peut être le glycol. Un tel procédé nécessite également une colonne d'absorption et une colonne de régénération. Une étape de refroidissement à basse température au moyen d'une machine frigorifique peut être nécessaire pour assurer une élimination plus complète de la fraction lourde contenue dans le gaz qui risque de condenser au cours du transport par le mécanisme de condensation rétrograde.The separation of the liquid hydrocarbon fraction is carried out in a series of settling tanks operating at increasingly low pressure levels so as to obtain a liquid fraction stable at atmospheric pressure. The gas fractions successively obtained must be recompressed in different compression plants to obtain a single gas fraction at the initial pressure. When the acid gas content is relatively high, the natural gas must then be deacidified by means of an absorption process with a solvent which can be for example an amine. Such a process requires an absorption column and a regeneration column. Natural gas must be dehydrated, for example by means of an absorption process with a solvent which maybe glycol. Such a process also requires an absorption column and a regeneration column. A cooling step at low temperature by means of a refrigerating machine may be necessary to ensure a more complete elimination of the heavy fraction contained in the gas which risks condensing during transport by the retrograde condensation mechanism.

Enfin le gaz résultant doit être recomprimé pour être transporté et ce poste compression représente une part importante des investissements.Finally, the resulting gas must be recompressed to be transported and this compression station represents a significant part of the investments.

L'ensemble de ces opérations est complexe et coûteux. Ces inconvénients, qui représentent un frein au développement du gaz naturel lorsqu'il est produit à terre, deviennent un obstacle majeur au développement du gaz naturel lorsqu'il est produit en mer.All of these operations are complex and costly. These drawbacks, which hinder the development of natural gas when it is produced on land, become a major obstacle to the development of natural gas when it is produced at sea.

Il a été découvert et c'est là l'objet de la présente invention un nouveau procédé permettant notamment la production de gaz naturel en évitant les inconvénients qui viennent d'être décrits. Ce procédé est ainsi particulièrement avantageux dans le cas d'une production en mer. D'une manière plus générale le procédé selon l'invention permet le transport d'un mélange diphasique gaz-liquide d'hydrocarbures.It has been discovered and this is the object of the present invention a new process allowing in particular the production of natural gas while avoiding the drawbacks which have just been described. This process is thus particularly advantageous in the case of production at sea. More generally, the process according to the invention allows the transport of a two-phase gas-liquid mixture of hydrocarbons.

Les difficultés rencontrées dans les procédés connus dans l'art antérieur proviennent du fait qu'il n'est pas possible de transférer directement le gaz au compresseur, en raison d'une part des risques de formation d'hydrates et d'autre part du fait que les compresseurs utilisés, généralement de type alternatif ou centrifuge, n'admettent pas de fraction liquide à l'entrée.The difficulties encountered in the processes known in the prior art arise from the fact that it is not possible to directly transfer the gas to the compressor, on the one hand due to the risks of hydrate formation and on the other hand the fact that the compressors used, generally of the reciprocating or centrifugal type, do not admit a liquid fraction at the inlet.

Il a été découvert qu'il est possible dans un tel cas de simplifier considérablement le procédé de production du gaz naturel en réalisant une injection de solvant polaire pour inhiber les hydrates et réduire éventuellement la teneur en gaz acides, à condition de réaliser l'étape de compression dans un compresseur apte à recevoir une phase gazeuse contenant une phase liquide ou même deux phases liquides en émulsion et de transporter en écoulement diphasique le mélange résultant ainsi comprimé. Il a été également découvert qu'une telle étape de compression peut être alors réalisée dans un compresseur comportant un rotor tournant de façon continue dans un carter creux, à condition de recueillir à la périphérie du rotor au moins en partie la fraction liquide contenue dans le gaz à l'admission, ce qui permet d'éviter des écoulements pulsés et/ou discontinus de gaz et de liquide qui entraîneraient une détérioration du compresseur.It has been discovered that it is possible in such a case to considerably simplify the process for producing natural gas by injecting polar solvent to inhibit hydrates and possibly reduce the content of acid gases, provided that performing the compression step in a compressor capable of receiving a gaseous phase containing a liquid phase or even two liquid phases in emulsion and transporting the resulting mixture thus compressed in two-phase flow. It has also been discovered that such a compression step can then be carried out in a compressor comprising a rotor rotating continuously in a hollow casing, provided that at the periphery of the rotor at least partially collect the liquid fraction contained in the gas at the intake, which avoids pulsed and / or discontinuous gas and liquid flows which would cause damage to the compressor.

L'art antérieur peut être illustré par les brevets Français FR-A-2.417.057 et FR-A-2.273.177, les brevets Américains US-A-4.132.535 et US-A-4.416.333, ainsi que par le brevet Anglais 1.561.454.The prior art can be illustrated by French patents FR-A-2,417,057 and FR-A-2,273,177, American patents US-A-4,132,535 and US-A-4,416,333, as well as by English patent 1,561,454.

Ainsi la présente invention concerne un procédé de compression et de transport a'un gaz contenant une fraction liquide hydrocarbure. Ce procédé se caractérise en ce qu'il comporte en combinaison les étapes suivantes : a) introduction dans ledit gaz d'une fraction liquide comprenant un solvant polaire, b) transfert dudit gaz vers un compresseur, c) compression dudit gaz dans ledit compresseur et récupération au moins en. partie de la fraction liquide contenue dans ledit gaz au cours de la même étape, d) réintroduction d'au moins une partie de la fraction liquide récupérée à l'étape c) dans le gaz comprimé, la fraction restante étant recyclée en un point en amont dudit compresseur, et e) transport dudit gaz comprimé résultant de l'étape d) jusqu'à un site de réception, l'étape a) pouvant être réalisée avant ou après l'étape c).Thus the present invention relates to a method of compression and transport to a gas containing a liquid hydrocarbon fraction. This process is characterized in that it comprises in combination the following steps: a) introduction into said gas of a liquid fraction comprising a polar solvent, b) transfer of said gas to a compressor, c) compression of said gas in said compressor and recovery at least in. part of the liquid fraction contained in said gas during the same step, d) reintroduction of at least part of the liquid fraction recovered in step c) in the compressed gas, the remaining fraction being recycled at a point in upstream of said compressor, and e) transport of said compressed gas resulting from step d) to a reception site, step a) being able to be carried out before or after step c).

Le compresseur pourra comporter un rotor tournant de façon continue dans un carter creux, la fraction liquide contenue dans le gaz admis dans le compresseur étant au moins en partie centrifugée à la périphérie interne du rotor au cours de l'étape de compression c) et on récupère ladite fraction liquide au moins en partie à la périphérie interne du rotor au cours de cette même étape c).The compressor may comprise a rotor rotating continuously in a hollow casing, the liquid fraction contained in the gas admitted into the compressor being at least partly centrifuged at the internal periphery of the rotor during the compression step c) and recovers said liquid fraction at least in part at the internal periphery of the rotor during this same step c).

Le procédé selon l'invention pourra comprendre une étape supplémentaire f) comportant la séparation sur le site de réception dudit gaz en trois phases formées par une phase gazeuse hydrocarbure, une phase liquide hydrocarbure et une phase solvant, la régénération d'au moins une partie de la phase solvant en séparant une fraction aqueuse et à pomper la phase solvant pour la recycler en un point en amont du compresseur.The method according to the invention may include an additional step f) comprising the separation on the reception site of said gas into three phases formed by a gaseous hydrocarbon phase, a liquid hydrocarbon phase and a solvent phase, the regeneration of at least part of the solvent phase by separating an aqueous fraction and pumping the solvent phase to recycle it at a point upstream of the compressor.

La fraction liquide introduite dans le courant gazeux pourra être dispersée de manière homogène en gouttelettes en majorité de moins de 2mm de diamètre. Cette dispersion homogène de la fraction liquide peut être réalisée au cours de l'étape a) à l'aide d'un mélangeur statique, hélice ou garnissage. La phase solvant pourra être notamment un alcool tel du méthanol.The liquid fraction introduced into the gas stream may be homogeneously dispersed into droplets, for the most part less than 2 mm in diameter. This homogeneous dispersion of the liquid fraction can be carried out during step a) using a static mixer, propeller or packing. The solvent phase may in particular be an alcohol such as methanol.

La fraction liquide contenue dans le gaz à comprimer et qui est récupérée à la périphérie du rotor peut assurer l'étanchéité entre le rotor et le carter.The liquid fraction contained in the gas to be compressed and which is recovered at the periphery of the rotor can ensure sealing between the rotor and the casing.

Le compresseur K pourra être un compresseur à vis éventuellement de type monovis, un compresseur à anneau liquide ou un compresseur centrifuge.The compressor K may be a screw compressor possibly of the single screw type, a liquid ring compressor or a centrifugal compressor.

Le débit de la fraction liquide recueillie à la sortie du compresseur peut être recyclé vers l'entrée du compresseur et contrôlé de manière à représenter 2 à 20 % du débit de gaz dans les conditions de refoulement.The flow rate of the liquid fraction collected at the outlet of the compressor can be recycled to the inlet of the compressor and controlled so as to represent 2 to 20% of the gas flow rate under the discharge conditions.

Bien entendu, on ne sortira pas du cadre de la présente invention si le compresseur comporte plusieurs étages de compression, l'effluent sortant d'un étage étant envoyé à l'entrée de l'étage suivant.Of course, it will not depart from the scope of the present invention if the compressor comprises several compression stages, the effluent leaving one stage being sent to the inlet of the following stage.

Le rapport du débit en volume de liquide sur le débit en volume de gaz dans les conditions de refoulement du compresseur K sera de préférence inférieur à 50 % de même qu'il pourra être inférieur à 10 %.The ratio of the volume flow rate of liquid to the volume flow rate of gas under the discharge conditions of the compressor K will preferably be less than 50%, just as it may be less than 10%.

Le procédé selon la présente invention pourra être appliqué à la production de gaz en mer au moyen de têtes de puits sous-marines. Le transfert vers la surface pourra se faire par des conduites flexibles. L'étape de compression et de récupération d'au moins une partie de phase liquide c) pourra être réalisée sur une plateforme fixe ou flottante.The method according to the present invention can be applied to the production of gas at sea by means of subsea well heads. The transfer to the surface can be done by flexible pipes. The compression and recovery step of at least part of the liquid phase c) may be carried out on a fixed or floating platform.

Lorsque le procédé selon l'invention est appliqué à la production de gaz naturel en mer au moyen de têtes de puits sous marines on pourra effectuer l'ensemble des étapes a) à d ) sous mer.When the method according to the invention is applied to the production of natural gas at sea by means of underwater well heads, all of the steps a) to d ) can be carried out underwater.

La présente invention concerne également le dispositif pour le transport d'un gaz contenant une fraction liquide d'hydrocarbure. Ce dispositif se caractérise en ce qu'il comporte en combinaison une ligne d'arrivée dudit gaz à transporter reliant la source de gaz à des moyens de compression et de séparation de la phase liquide et de la phase gazeuse, ces moyens comportant un orifice de sortie de la phase gazeuse et un orifice de sortie de la phase liquide, une ligne d'introduction d'un solvant reliant une source de solvant à la ligne d'arrivée et au moins une ligne de transport reliée à l'orifice de sortie de la phase gazeuse.The present invention also relates to the device for transporting a gas containing a liquid hydrocarbon fraction. This device is characterized in that it comprises in combination an inlet line of said gas to be transported connecting the gas source to means for compressing and separating the liquid phase and the gaseous phase, these means comprising an orifice for outlet from the gas phase and an outlet for the liquid phase, a line for introducing a solvent connecting a source of solvent to the inlet line and at least one transport line connected to the outlet for the gas phase.

Le dispositif selon l'invention pourra comporter une ligne de uniques recirculation de la phase liquide produite par les moyensYde compression et de séparation, cette ligne reliant l'orifice de sortie de la phase liquide à la ligne d'arrivée. Le dispositif selon l'invention pourra comporter une ligne de réintroduction de la phase liquide, cette ligne reliant l'orifice de sortie de la phase liquide à la ligne de transport.The device according to the invention may include a line of single recirculation of the liquid phase produced by the compression and separation means, this line connecting the outlet orifice of the liquid phase to the finish line. The device according to the invention may include a line for reintroducing the liquid phase, this line connecting the outlet port of the liquid phase to the transport line.

Le dispositif selon l'invention pourra comporter en amont des moyens uniques de compression et de séparation un dispositif mélangeur.The device according to the invention may comprise upstream unique compression and separation means a mixing device.

Bien entendu on ne sortira pas du cadre de la présente invention en disposant des moyens de contrôle des débits passant dans les différentes lignes.Of course, it will not depart from the scope of the present invention by having means for controlling the flow rates passing through the different lines.

La présente invention sera mieux comprise et ses avantages apparaitront plus clairement à la lecture de la description de l'exemple particulier suivant nullement limitatif illustré par les figures ci-annexées parmi lesquelles :

  • - la figure 1 représente un schéma permettant de décrire le procédé selon l'invention,
  • - les figures 2 et 3 montrent des compresseurs convenant à l'application du procédé, et,
  • - la figure 4 un mode d'application particulier du procédé selon la présente invention.
The present invention will be better understood and its advantages will appear more clearly on reading the description of the following particular example, which is in no way limiting, illustrated by the appended figures among which:
  • FIG. 1 represents a diagram making it possible to describe the method according to the invention,
  • FIGS. 2 and 3 show compressors suitable for applying the method, and,
  • - Figure 4 a particular mode of application of the method according to the present invention.

Le procédé selon l'invention appliqué à la production de gaz naturel est décrit en relation avec la figure 1 qui en schématise les principales étapes.The process according to the invention applied to the production of natural gas is described in relation to FIG. 1 which schematizes the main steps.

Le gaz naturel sort sous pression du puits de production par la conduite ou ligne 1.. Il contient alors une fraction lourde hydrocarbure liquide susceptible de condenser au cours d'une des étapes de traitement et de transport. Il est alors mélangé avec une fraction liquide comprenant un solvant polaire S suivant par la conduite ou ligne 2. Le mélange résultant est transféré vers un compresseur K à travers la conduite ou ligne 3.The natural gas leaves the production well under pressure via the pipe or line 1. It then contains a heavy fraction of liquid hydrocarbon capable of condensing during one of the treatment and transport stages. It is then mixed with a liquid fraction comprising a polar solvent S following via line or line 2. The resulting mixture is transferred to a compressor K through line or line 3.

A l'entrée du compresseur K est placé un dispositif M destiné à obtenir une dipersion homogène du liquide contenu dans le gaz. Ce dispositif est de préférence statique et peut être constitué par exemple par un mélangeur de type mélangeur à garnissage, ou par un mélangeur de type mélangeur à hélice. Le mélange ressort du dispositif M par le conduit ou ligne 4 et est admis dans le compresseur K.At the inlet of the compressor K is placed a device M intended to obtain a homogeneous dipersion of the liquid contained in the gas. This device is preferably static and can be constituted, for example, by a mixer of the padded mixer type, or by a mixer of the propeller mixer type. The mixture leaves the device M via the conduit or line 4 and is admitted into the compressor K.

La compression est avantageusement réalisée par un compresseur comportant un rotor tournant de façon continue dans un carter creux. La phase liquide est ainsi recueillie en majeure partie à la périphérie du rotor, puis évacuée de façon continue, de façon à éviter un fonctionnement pulsé du compresseur qui conduirait à sa détérioration. Une partie au moins de cette phase liquide est réintroduite dans le gaz comprimé (ligne 5 du schéma de la figure 1). Le mélange comprimé obtenu est transporté en écoulement diphasique dans la conduite ou ligne 7 jusqu'à un site de réception.The compression is advantageously carried out by a compressor comprising a rotor rotating continuously in a hollow casing. The liquid phase is thus mainly collected at the periphery of the rotor, then continuously evacuated, so as to avoid pulsed operation of the compressor which would lead to its deterioration. At least part of this liquid phase is reintroduced into the compressed gas (line 5 of the diagram in FIG. 1). The compressed mixture obtained is transported in two-phase flow in the pipe or line 7 to a reception site.

Sur ce site de réception les fractions liquides contenues dans le gaz décantent dans le ballon B1. Le gaz naturel est évacué par la conduite ou ligne 8 et la fraction hydrocarbure liquide est évacuée par la conduite ou ligne 9. La phase solvant est évacuée par la conduite ou ligne 10. Une fraction de cette phase solvant passant par la conduite ou ligne 11 est régénérée. Cette régénération est figurée par la colonne de distillation Dl, mais peut être également opérée par d'autres méthodes connues, par exemple par détente et vaporisation à pression réduite. La fraction aqueuse est évacuée par la conduite ou ligne 12 et la fraction solvant qui contient une fraction hydrocarbure est évacuée par la conduite ou ligne 13 et recyclée vers l'entrée du compresseur par la pompe Pl. La fraction de la phase solvant non régénérée est recyclée par la pompe P2. En définitive le procédé est caractérisé en ce qu'il comporte en combinaison les étapes suivantes : a) introduction dans le gaz provenant du puits d'une fraction liquide comprenant un solvant polaire S, b) transfert de l'effluent résultant vers un compresseur K, c) compression dudit gaz dans le compresseur K et récupération d'au moins une partie de la fraction liquide contenue dans le gaz, d) réintroduction d'au moins une partie de la fraction liquide recueillie à l'étape c) dans le gaz comprimé, la fraction restante étant recyclée en un point un amont dudit compresseur, et e) transport de l'effluent comprimé résultant de l'étape d) jusqu'à un site de réception.On this reception site the liquid fractions contained in the gas decant in the tank B1. Natural gas is evacuated via line or line 8 and the liquid hydrocarbon fraction is evacuated via line or line 9. The solvent phase is evacuated via line or line 10. A fraction of this solvent phase passing through line or line 11 is regenerated. This regeneration is represented by the distillation column D1, but can also be carried out by other known methods, for example by expansion and vaporization at reduced pressure. The aqueous fraction is evacuated via line or line 12 and the solvent fraction which contains a hydrocarbon fraction is evacuated via line or line 13 and recycled to the inlet of the compressor by pump P1. The fraction of the non-regenerated solvent phase is recycled by pump P2. Ultimately, the process is characterized in that it comprises in combination the following stages: a) introduction into the gas coming from the well of a liquid fraction comprising a polar solvent S, b) transfer of the resulting effluent to a compressor K , c) compression of said gas in compressor K and recovery of at least part of the liquid fraction contained in the gas, d) reintroduction of at least part of the liquid fraction collected in step c) in the gas compressed, the remaining fraction being recycled at a point upstream of said compressor, and e) transport of the compressed effluent resulting from step d) to a reception site.

L'étape a) qui concerne l'introduction du solvant polaire peut être effectuée avant ou après l'étape c). Toutefois, il est préférable de l'effectuer avant cette étape.Step a) which relates to the introduction of the polar solvent can be carried out before or after step c). However, it is best to do it before this step.

Comme cela ressort de la description du procédé en relation avec le schéma de la figure 1, le procédé comporte en général une étape supplémentaire f) de séparation sur le site de réception l'effluent transporté en trois phases formées par une phase gazeuse hydrocarbure, une phase liquide hydrocarbure et une phase solvant, et de régénération au moins une partie de la phase solvant en séparant une fraction aqueuse à pomper la phase solvant pour la recycler à l'étape a).As is apparent from the description of the process in relation to the diagram in FIG. 1, the process generally comprises an additional step f) of separation on the receiving site of the effluent transported in three phases formed by a gaseous hydrocarbon phase, a liquid hydrocarbon phase and a solvent phase, and regenerating at least part of the solvent phase by separating an aqueous fraction to be pumped out the solvent phase in order to recycle it in step a).

La régénération de la phase solvant est nécessaire pour éviter une accumulation d'eau excessive dans ladite phase solvant. Dans le cas d'un gaz saturé en eau, en l'absence d'étape de régénération, la teneur en eau de la phase solvant tendrait à augmenter indéfiniment sans qu'un régime stationnaire puisse s'établir. Toutefois cette régénération peut ne pas être nécessaire dans le cas d'un gaz naturel à faible teneur en eau et gaz acides. D'autre part, il n'est généralement pas indispensable de régénérer la totalité du débit de solvant et la régénération peut ne porter que sur une fraction de ce débit comprise, par exemple, entre 5 et 30 %. Comme cela a été indiqué, les différentes méthodes connues pour régénérer la phase solvant peuvent être utilisées. Cette régénération peut être effectuée en une ou plusieurs étapes.Regeneration of the solvent phase is necessary to avoid excessive accumulation of water in said solvent phase. In the case of a gas saturated with water, in the absence of a regeneration step, the water content of the solvent phase would tend to increase indefinitely without a steady state being able to be established. However, this regeneration may not be necessary in the case of a natural gas with a low content of water and acid gases. On the other hand, it is generally not essential to regenerate the entire flow of solvent and the regeneration may relate only to a fraction of this flow of, for example, between 5 and 30%. As indicated, the various known methods for regenerating the solvent phase can be used. This regeneration can be carried out in one or more stages.

Le gaz séparé de la phase solvant liquide peut entraîner du solvant en phase vapeur. Cet entrainement de solvant en phase vapeur correspond à une consommation qui doit être compensée par un appoint. L'entrainement de solvant en phase solvant peut être réduit par les différentes méthodes connues, en particulier en réfrigérant le gaz.The gas separated from the liquid solvent phase can entrain solvent in the vapor phase. This entrainment of solvent in the vapor phase corresponds to a consumption which must be compensated by an addition. The entrainment of solvent in the solvent phase can be reduced by the various known methods, in particular by refrigerating the gas.

Les différentes opérations de l'étape f) sont normalement réalisées sur le site de réception. Dans certains cas l'étape f ) peut être réalisée en totalité ou en partie avant l'étape de transport pour faciliter l'étape du transport.The various operations in step f) are normally carried out at the receiving site. In some cases step f) can be carried out in whole or in part before the transport step to facilitate the transport step.

Le solvant S peut être constitué par différents solvants polaires et peut être par exemple, un alcool, une cétone, un aldéhyde, un éther. Des mélanges de solvants peuvent être également utilisés.The solvent S can consist of different polar solvents and can be, for example, an alcohol, a ketone, an aldehyde, an ether. Mixtures of solvents can also be used.

Le solvant est de préférence de type alcool. Le méthanol est particulièrement adapté en raison de la grande solubilité de l'eau dans le méthanol et de la faible viscosité du méthanol qui permet de limiter les pertes de charge au cours des étapes de transport. Différents glycols peuvent être également utilisés tels que par exemple le diéthylène glycol, le triëthylène glycol ou le dimethylether tétraéthylène glycol.The solvent is preferably of the alcohol type. Methanol is particularly suitable because of the high solubility of water in methanol and the low viscosity of methanol which makes it possible to limit the pressure drops during the transport stages. Different glycols can also be used, such as for example diethylene glycol, triethylene glycol or dimethyl ether tetraethylene glycol.

Les hydrocarbures les plus lourds contenus dans le gaz naturel et notamment ceux qui sont présents en phase liquide sont partiellement solubles dans la phase solvant. Toutefois la dissolution d'eau réduit cette solubilité et après injection du solvant, la fraction liquide contenue dans le gaz est en général formée de deux phases.The heaviest hydrocarbons contained in natural gas and in particular those which are present in the liquid phase are partially soluble in the solvent phase. However, the dissolution of water reduces this solubility and after injection of the solvent, the liquid fraction contained in the gas is generally formed of two phases.

Dans le procédé selon l'invention, ladite fraction liquide est de préférence dispersée de manière homogène en gouttelettes en majorité de moins de 2 mm de diamètre. Ceci permet d'éviter des efforts mécaniques localisés et dissymétriques sur le rotor du compresseur, dus à l'impact de masses liquides relativement importantes, qui sont préjudiciables à la durée de vie du compresseur.In the process according to the invention, said liquid fraction is preferably dispersed homogeneously into droplets, for the most part less than 2 mm in diameter. This makes it possible to avoid localized and asymmetrical mechanical forces on the compressor rotor, due to the impact of relatively large liquid masses, which are detrimental to the life of the compressor.

Cette dispersion homogène est obtenue de préférence à l'aide d'un mélangeur statique : ce mélangeur statique peut être formé par un garnissage ou une hélice. Il peut comprendre un ou plusieurs éléments qui peuvent être décalés en rotation pour favoriser la turbulence. D'autres méthodes de dispersion peuvent être également mises en oeuvre, comme par exemple celles qui font appel à un agitateur tournant.This homogeneous dispersion is preferably obtained using a static mixer: this static mixer can be formed by a packing or a propeller. It can include one or more elements which can be offset in rotation to promote turbulence. Other dispersion methods can also be implemented, such as for example those which use a rotary agitator.

Lorsque la fraction liquide comprend deux phases, elle forme alors une émulsion homogène qui est elle même dispersée en gouttelettes.When the liquid fraction comprises two phases, it then forms a homogeneous emulsion which is itself dispersed in droplets.

Dans le procédé selon l'invention, il a été découvert que la fraction liquide peut être alors envoyée au compresseur si on utilise un compresseur comportant un rotor tournant de façon continue dans un carter creux, dans lequel la fraction liquide contenue dans le gaz admis dans le compresseur est au moins en partie centrifugée à la périphérie interne du rotor au cours de l'étape de compression c) et à condition de recueillir ladite fraction liquide au moins en partie à la périphérie interne du rotor au cours de cette même étape c). Il a été découvert que le compresseur assure ainsi, outre sa fonction de compression une fonction de séparation de la phase liquide.In the method according to the invention, it has been discovered that the liquid fraction can then be sent to the compressor if a compressor is used which has a rotor rotating continuously in a hollow casing, in which the liquid fraction contained in the gas admitted into the compressor is at least partially centrifuged at the internal periphery of the rotor during the compression step c) and provided that said liquid fraction is collected at least in part at the internal periphery of the rotor during this same step c). It has been discovered that the compressor thus ensures, in addition to its compression function, a function of separation of the liquid phase.

Il a été également découvert que la fraction liquide ainsi recueillie à la périphérie du rotor peut assurer une fonction d'étanchéité entre le rotor du compresseur et l'intérieur du carter. Dans ce cas, si la fraction liquide contenud dans le gaz représente un débit en volume relativement faible, il peut être nécessaire de faire recirculer une partie du liquide recueilli en sortie du compresseur. Il est alors avantageux de refroidir ce débit de liquide qui recircule pour réduire le travail de compression ainsi que la température de refoulement.It has also been discovered that the liquid fraction thus collected at the periphery of the rotor can provide a sealing function between the compressor rotor and the interior of the casing. In this case, if the liquid fraction contained in the gas represents a relatively low volume flow rate, it may be necessary to recirculate part of the liquid collected at the outlet of the compressor. It is then advantageous to cool this flow of liquid which recirculates to reduce the compression work as well as the discharge temperature.

Le compresseur K peut être ainsi un compresseur à vis. La mise en oeuvre dans le procédé selon l'invention d'un tel compresseur est illustrée par le schéma de la figure 2.The compressor K can thus be a screw compressor. The implementation in the process according to the invention of such a compressor is illustrated by the diagram in FIG. 2.

Le mélange à comprimer arrive dans le compresseur par le conduit 20. La fraction liquide est centrifugée par la rotation du rotor et assure l'étanchéité entre le rotor et l'intérieur du carter. La fraction liquide recueillie à la périphérie du rotor est évacuée par la gorge 21b et la conduite 21. Une partie de cette fraction liquide est recyclée à l'entrée du compresseur par la conduite 22 au moyen de la pompe P10 incorporée au compresseur. La fraction restante de liquide est recombinée avec le gaz comprimé grâce à la conduite 22a. L'effluent ainsi formé est évacué par la conduite 23.The mixture to be compressed arrives in the compressor through line 20. The liquid fraction is centrifuged by the rotation of the rotor and ensures sealing between the rotor and the inside of the casing. The liquid fraction collected at the periphery of the rotor is discharged through the groove 21b and the pipe 21. A part of this liquid fraction is recycled to the inlet of the compressor through the pipe 22 by means of the pump P10 incorporated in the compressor. The remaining fraction of liquid is recombined with the compressed gas through line 22a. The effluent thus formed is discharged through line 23.

Bien entendu, la présence de la conduite 22a n'est pas nécessaire et l'effluent sortant de l'orifice 21a peut comporter déjà une phase liquide.Of course, the presence of the pipe 22a is not necessary and the effluent leaving the orifice 21a may already include a liquid phase.

Deux types de compresseurs à vis peuvent plus particulièrement être utilisés : le compresseur double-vis, dans lequel le gaz est comprimé par engrénement d'une vis motrice et d'une vis entraînée et le compresseur monovis, dans lequel le gaz est comprimé par engrénement d'une vis motrice et de deux roues satellites.Two types of screw compressors can more particularly be used: the twin-screw compressor, in which the gas is compressed by meshing with a driving screw and a driven screw and the single-screw compressor, in which the gas is compressed by meshing a driving screw and two satellite wheels.

Le compresseur monovis présente l'avantage de pouvoir être plus facilement adapté à un fonctionnement à pression élevée, du fait que le rotor est soumis à des contraintes mieux équilibrées et ne subit pas de poussée radiale importante même pour des pressions de refoulement élevées. Le compresseur monovis constitue donc dans l'application du procédé selon l'invention une version préférée du compresseur à vis.The single-screw compressor has the advantage of being able to be more easily adapted to operation at high pressure, because the rotor is subjected to better balanced stresses and does not undergo a significant radial thrust even at high discharge pressures. The single-screw compressor therefore constitutes in the application of the method according to the invention a preferred version of the screw compressor.

Le compresseur K peut être également constitué par un compresseur à anneau liquide, dont le fonctionnement est schématisé sur la figure 3.The compressor K can also be constituted by a liquid ring compressor, the operation of which is shown diagrammatically in FIG. 3.

Le gaz contenant la fraction liquide arrive dans le compresseur par les orifices d'admission 30 et 31. Il se trouve alors emprisonné entre des pales du rotor 32 qui tourne de façon continue. Le liquide contenu dans le gaz est recueilli à la périphérie interne du carter en formant un anneau liquide. Lorsque la rotation du rotor amène le gaz emprisonné entre les pales à proximité des orifices de refoulement 33 et 34, le bord de l'anneau liquide se rapproche de l'axe du rotor par suite de la forme interne du carter et le gaz se trouve comprimé.The gas containing the liquid fraction arrives in the compressor through the intake orifices 30 and 31. It is then trapped between blades of the rotor 32 which rotates continuously. The liquid contained in the gas is collected at the internal periphery of the casing by forming a liquid ring. When the rotation of the rotor brings the gas trapped between the blades near the discharge orifices 33 and 34, the edge of the liquid ring approaches the axis of the rotor due to the internal shape of the casing and the gas is found compressed.

A la sortie du compresseur une partie du liquide contenu dans le gaz est évacuée avec le gaz comprimé et une partie est recyclée vers l'entrée du compresseur.At the outlet of the compressor, part of the liquid contained in the gas is evacuated with the compressed gas and part is recycled to the inlet of the compressor.

Comme dans le cas du compresseur à vis, la fraction liquide contenue dans le gaz arrivant dans le compresseur sert à assurer une fonction d'étanchéité entre le rotor et le carter. Lorsque ladite fraction liquide assure une telle fonction d'étanchéité et si le débit de fraction liquide initialement contenue dans le gaz est relativement faible, le débit de la fraction liquide recueillie à la sortie du compresseur K qui est recyclé vers l'entrée du compresseur doit être contrôlé de manière à représenter de préférence 2 à 20 % du débit de ; gaz dans les conditions de refoulement.As in the case of the screw compressor, the liquid fraction contained in the gas arriving in the compressor serves to ensure a sealing function between the rotor and the casing. When said liquid fraction provides such a sealing function and if the flow rate of liquid fraction initially contained in the gas is relatively low, the flow rate of the liquid fraction collected at the outlet of the compressor K which is recycled to the inlet of the compressor must be controlled so as to preferably represent 2 to 20% of the flow of; gas under discharge conditions.

Le compresseur à anneau liquide est utilisé de préférence lorsque le taux de compression à obtenir est faible.The liquid ring compressor is preferably used when the compression ratio to be obtained is low.

Le compresseur à vis et le compresseur à anneau liquide ne sont pas les seuls à pouvoir être utilisés.The screw compressor and the liquid ring compressor are not the only ones that can be used.

Le compresseur centrifuge peut être également utilisé, à condition que la phase liquide centrifugée par rotation du rotor puisse être recueillie à la périphérie interne du carter.The centrifugal compressor can also be used, provided that the liquid phase centrifuged by rotation of the rotor can be collected at the internal periphery of the casing.

Ainsi, la présente invention prévoit sur les moyens uniques de compression et de séparation au moins un orifice de récupération de la phase liquide.Thus, the present invention provides on the unique means of compression and separation at least one orifice for recovering the liquid phase.

L'étape de compression et de séparation c) du procédé peut être réalisée en utilisant plusieurs étages de moyens uniques de compression et de séparation, le mélange des phases liquide et gazeuse sortant d'un étage étant envoyé à l'entrée de l'étage suivant.The compression and separation step c) of the process can be carried out using several stages of single compression and separation means, the mixture of the liquid and gaseous phases leaving a stage being sent to the entry of the stage. following.

Il est possible ainsi d'atteindre les pressions de refoulement très élevées, par exemple comprises entre 100 et 200 bars, qui peuvent être nécessaires pour transporter le gaz, à condition que le compresseur soit dimensionné pour les efforts mécaniques correspondants.It is thus possible to reach very high discharge pressures, for example between 100 and 200 bars, which may be necessary to transport the gas, provided that the compressor is dimensioned for the corresponding mechanical forces.

Le procédé selon l'invention permet de comprimer et de transporter un gaz naturel contenant des fractions liquides variables, mais il s'applique de préférence à des cas où la quantité de liquide entraînée par le gaz représente un débit en volume inférieur à 50 % du débit volumique total de mélange diphasique dans les conditions de refoulement du compresseur (GOR, volume de gaz sur volume de liquide, supérieur à 1 dans les conditions de refourlement du compresseur) et plus particulièrement dans le cas où la quantité de liquide entraînée représente un débit en volume inférieur a 10 % du débit volumique total dans les conditions de refoulement (GOR supérieur à 9 dans les conditions de refoulement).The method according to the invention makes it possible to compress and transport a natural gas containing variable liquid fractions, but it is preferably applied to cases where the quantity of liquid entrained by the gas represents a flow rate in volume of less than 50% of the total volume flow of two-phase mixture under the discharge conditions of the compressor (GOR, volume of gas over volume of liquid, greater than 1 under the conditions of refueling of the compressor) and more particularly in the case where the quantity of liquid entrained represents a flow in volume less than 10% of the total volume flow under the discharge conditions (GOR greater than 9 in the discharge conditions).

Le procédé est particulièrement avantageux dans le cas d'une production de gaz en mer.The process is particularly advantageous in the case of gas production at sea.

En effet dans les procédés de production connus dans l'art antérieur, les diférentes opérations de séparation des fractions liquides de déshydratation, désacidification et compression doivent être réalisées sur une plateforme. Ceci se traduit par des investissements importants.In fact, in the production methods known in the prior art, the different operations for separating the liquid fractions of dehydration, deacidification and compression must be carried out on a platform. This results in significant investments.

Il est actuellement possible de produire le gaz naturel au moyen de têtes de puits sous-marines qui sont commandées soit à partir d'une plateforme de commande et de contrôle, soit, avec l'amélioration de la fiabilité des dispositifs de télécommande, à partir d'une plateforme centrale ou même d'une station à terre.It is currently possible to produce natural gas by means of subsea well heads which are controlled either from a command and control platform or, with the improvement of the reliability of the remote control devices, from a central platform or even a shore station.

Dans ce cas, une première version de mise en oeuvre du procédé selon l'invention consiste à produire le gaz naturel en mer au moyen de têtes de puits sous-marines et à le transférer vers la surface, par exemple par des conduites flexibles, l'étape de compression c) étant réalisée sur une plateforme fixe ou flottante. La mise en oeuvre du procédé permet de supprimer les différentes opérations de séparation des fractions liquides, de recompression des fractions gazeuses obtenues par détentes successives des fractions liquides, de déshydratation et de compression et de réduire ainsi considérablement le poids et l'encombrement des installations placées sur la plateforme.In this case, a first implementation version of the method according to the invention consists in producing natural gas at sea by means of underwater well heads and in transferring it to the surface, for example by flexible pipes, l compression step c) being carried out on a fixed or floating platform. The implementation of the method makes it possible to eliminate the various operations of separation of the liquid fractions, of recompression of the gaseous fractions obtained by successive expansion of the liquid fractions, of dehydration and of compression and thus considerably reducing the weight and the bulk of the installations placed on the platform.

Une deuxième version de mise en oeuvre du procédé selon l'invention consiste à réaliser l'ensemble des étapes a) à d ) du procédé sous l'eau.A second implementation version of the process according to the invention consists in carrying out all of the steps a) to d) of the process underwater.

Le compresseur K doit être alors placé sous-mer dans un caisson étanche. Il est alimenté en énergie par un câble électrique sous- marin et contrôlé par télécommande.The compressor K must then be placed underwater in a sealed box. It is supplied with energy by an underwater electric cable and controlled by remote control.

Cette version de mise en oeuvre du procédé est illustrée par le schéma de la Figure 4.This implementation version of the method is illustrated by the diagram in Figure 4.

Le gaz est produit par une station de production sous-marine 40 comportant six têtes de puits. Par le conduit 41 est amené le solvant qui est injecté dans le gaz.The gas is produced by an underwater production station 40 comprising six well heads. Through the conduit 41 is brought the solvent which is injected into the gas.

L'alimentation électrique s'effectue par la ligne 42. Le gaz produit est rassemblé dans un collecteur et évacué par la conduite 44 par laquelle il est envoyé au compresseur K. Le compresseur K est alimenté en énergie électrique par la ligne 43. Le mélange diphasique comprimé est évacué par la conduite 45 pour être transporté en écoulement diphasique jusqu'à une station de réception (non représentée) qui peut être olacée à terre.The electrical supply is carried out by line 42. The gas produced is collected in a collector and evacuated by line 44 by which it is sent to compressor K. The compressor K is supplied with electrical energy by line 43. The mixture Compressed two-phase is evacuated via line 45 to be transported in two-phase flow to a receiving station (not shown) which can be oleated on the ground.

Claims (16)

1. - Procédé de compression et de transport d'un gaz contenant une fraction liquide hydrocarbure, caractérisé en ce qu'il comporte en combinaison, les étapes suivantes : a) introduction dans ledit gaz d'une fraction liquide comprenant un solvant polaire, b) transfert dudit gaz vers un compresseur, c) compression dudit gaz dans ledit compresseur et récupération d'au moins une partie de la fraction liquide contenue dans ledit gaz au cours de la même étape, d) réintroduction d'au moins une partie de la fraction liquide recueillie à l'étape c) dans le gaz comprimé, la fraction restante étant recyclée en un point en amont dudit compresseur, et e) transport dudit gaz comprimé résultant de l'étape d) jusqu'à un site de réception, l'étape a) pouvant être réalisée avant ou après l'étape b).1. - A method of compressing and transporting a gas containing a liquid hydrocarbon fraction, characterized in that it comprises in combination, the following steps: a) introduction into said gas of a liquid fraction comprising a polar solvent, b ) transfer of said gas to a compressor, c) compression of said gas in said compressor and recovery of at least part of the liquid fraction contained in said gas during the same step, d) reintroduction of at least part of the liquid fraction collected in step c) in the compressed gas, the remaining fraction being recycled at a point upstream of said compressor, and e) transport of said compressed gas resulting from step d) to a reception site, l step a) can be carried out before or after step b). 2. - Procédé selon la revendication 1, caractérisé en ce que l'on utilise un compresseur K comportant un rotor tournant de façon continue dans un carter creux, la fraction liquide contenue dans le gaz admis dans le compresseur K étant au moins en partie centrifugée à la périphérie interne du rotor au cours de l'étape de compression c) et en ce que l'on récupère ladite fraction liquide au moins en partie à la périphérie interne du rotor au cours de cette même étape c).2. - Method according to claim 1, characterized in that a compressor K is used comprising a rotor rotating continuously in a hollow casing, the liquid fraction contained in the gas admitted into the compressor K being at least partially centrifuged at the inner periphery of the rotor during the compression step c) and in that said liquid fraction is recovered at least in part at the inner periphery of the rotor during this same step c). 3. - Procédé selon l'une des revendications 1 à 2, caractérisé en ce qu'il comprend une étape supplémentaire f) comportant la séparation sur le site de réception dudit gaz en trois phases formées par une phase gazeuse hydrocarbure, une phase liquiàe hydrocarbure et une phase solvant, la régénération d'au moins une partie de la phase solvant en séparant une fraction aqueuse et à pomper la phase solvant pour la recycler en un point en amont dudit compresseur.3. - Method according to one of claims 1 to 2, characterized in that it comprises an additional step f) comprising the separation on the receiving site of said gas into three phases formed by a gaseous hydrocarbon phase, a liquid hydrocarbon phase and a solvent phase, the regeneration of at least part of the solvent phase by separating an aqueous fraction and pumping the solvent phase to recycle it at a point upstream of said compressor. 4. - Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la phase solvant (S) est un alcool tel que le méthanol.4. - Method according to one of claims 1 to 3, characterized in that the solvent phase (S) is an alcohol such as methanol. 5. - Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la fraction liquide contenue dans le gaz à comprimer et qui est récupérée à la périphérie du rotor assure l'étanchéité entre le rotor et le carter.5. - Method according to one of claims 1 to 4, characterized in that the liquid fraction contained in the gas to be compressed and which is recovered at the periphery of the rotor provides sealing between the rotor and the housing. 6. - Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le compresseur K est un compresseur à vis.6. - Method according to one of claims 1 to 5, characterized in that the compressor K is a screw compressor. 7. - Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le compresseur K est un compresseur à anneau liquide.7. - Method according to one of claims 1 to 5, characterized in that the compressor K is a liquid ring compressor. 8. - Procédé selon l'une des revendications 1 à 7, caractérisé en ce que le débit de la fraction liquide recueillie à la sortie du compresseur K qui est recyclé vers l'entrée de ce compresseur est contrôlé de manière à représenter 2 à 20 % du débit de gaz dans les conditions de refoulement.8. - Method according to one of claims 1 to 7, characterized in that the flow rate of the liquid fraction collected at the outlet of the compressor K which is recycled to the inlet of this compressor is controlled so as to represent 2 to 20 % of gas flow under discharge conditions. 9. - Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le compresseur K est un compresseur centrifuge.9. - Method according to one of claims 1 to 4, characterized in that the compressor K is a centrifugal compressor. 10. - Procédé selon l'une des revendications 1 à 9, caractérisé en ce que le rapport du débit en volume de liquide sur le débit en volume de gaz dans les conditions de refoulement du compresseur K est inférieur à 50 %.10. - Method according to one of claims 1 to 9, characterized in that the ratio of the flow rate by volume of liquid to the flow rate by volume of gas under the discharge conditions of the compressor K is less than 50%. 11. - Procédé selon l'une des revendications 1 à 10, caractérisé en ce que le gaz naturel est produit en mer au moyen de têtes de puits sous-marines et transféré vers la surface par des conduites flexibles, l'étape de compression c) étant réalisée sur une plateforme fixe ou flottante.11. - Method according to one of claims 1 to 10, characterized in that natural gas is produced at sea by means of underwater well heads and transferred to the surface by flexible pipes, the compression step c ) being carried out on a fixed or floating platform. 12. - Procédé selon l'une des revendications 1 à 11, caractérisé en ce que le gaz naturel est produit en mer au moyen de têtes de puits sous-marines, l'ensemble des étapes a) et d) étant réalisé sous l'eau.12. - Method according to one of claims 1 to 11, characterized in that the natural gas is produced at sea by means of subsea well heads, all of the steps a) and d) being carried out under the water. 13. - Dispositif pour le transport d'un gaz contenant une fraction liquide d'hydrocarbure, caractérisé en ce qu'il comporte en combinaison une ligne (1) d'arrivée dudit gaz à transporter reliant la source de gaz à des moyens uniques de compression et de séparation de la phase liquide et de la phase gazeuse, ces moyens comportant un orifice de sortie de la phase gazeuse et un orifice de sortie de la phase liquide, une ligne d'introduction d'un solvant reliant une source de solvant (D1, 81) à la ligne d'arrivée (1) et au moins une ligne de transport (7) reliée à l'orifice de sortie de la phase gazeuse.13. - Device for the transport of a gas containing a liquid hydrocarbon fraction, characterized in that it comprises in combination a line (1) of arrival of said gas to be transported connecting the gas source to unique means of compression and separation of the liquid phase and the gaseous phase, these means comprising an outlet orifice for the gaseous phase and an outlet for the liquid phase, a line for introducing a solvent connecting a solvent source (D1, 81) at the finish line (1) and at least one transport line (7) connected to the outlet port of the gas phase. 14. - Dispositif selon la revendication 13, caractérisé en ce que les moyens uniques de compression et de séparation comportent un compresseur (K) à rotor tournant.14. - Device according to claim 13, characterized in that the single compression and separation means comprise a compressor (K) with rotating rotor. 15. - Dispositif selon la revendication 13, caractérisé en ce qu'il comporte une ligne (6) de recirculation de la phase liquide produite par les moyens de recirculation, ladite ligne reliant l'orifice de sortie de la phase liquide à la ligne d'arrivée (1).15. - Device according to claim 13, characterized in that it comprises a line (6) of recirculation of the liquid phase produced by the recirculation means, said line connecting the outlet orifice of the liquid phase to the line d 'arrival (1). 16. - Dispositif selon l'une des revendications 13 ou 15, caractérisé en ce qu'il comporte une ligne 5 de réintroduction de la phase liquide reliant l'orifice de sortie de la phase liquide à la ligne de transport (5).16. - Device according to one of claims 13 or 15, characterized in that it comprises a line 5 for reintroduction of the liquid phase connecting the outlet orifice of the liquid phase to the transport line (5).
EP85401735A 1984-09-07 1985-09-06 Method and apparatus for the compression and transportation of a gas comprising a liquid fraction Expired EP0178962B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8413757A FR2570162B1 (en) 1984-09-07 1984-09-07 METHOD AND DEVICE FOR COMPRESSING AND TRANSPORTING A GAS CONTAINING A LIQUID FRACTION
FR8413757 1984-09-07

Publications (2)

Publication Number Publication Date
EP0178962A1 true EP0178962A1 (en) 1986-04-23
EP0178962B1 EP0178962B1 (en) 1989-05-24

Family

ID=9307515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401735A Expired EP0178962B1 (en) 1984-09-07 1985-09-06 Method and apparatus for the compression and transportation of a gas comprising a liquid fraction

Country Status (8)

Country Link
US (1) US4948394A (en)
EP (1) EP0178962B1 (en)
JP (1) JPS6188098A (en)
AR (1) AR244315A1 (en)
CA (1) CA1301216C (en)
DE (1) DE3570508D1 (en)
FR (1) FR2570162B1 (en)
NO (1) NO160876C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657416A1 (en) * 1990-01-23 1991-07-26 Inst Francais Du Petrole METHOD AND DEVICE FOR TRANSPORTING AND PROCESSING NATURAL GAS
FR2735211A1 (en) * 1995-06-06 1996-12-13 Inst Francais Du Petrole PROCESS FOR TRANSPORTING A FLUID SUCH AS A DRY GAS, LIKELY TO FORM HYDRATES
FR2735210A1 (en) * 1995-06-06 1996-12-13 Inst Francais Du Petrole PROCESS FOR RECYCLING A DISPERSING ADDITIVE USED FOR THE TRANSPORT OF A CONDENSATE GAS OR OF A PETROLEUM WITH ASSOCIATED GAS IN THE PRESENCE OF HYDRATES
RU2732862C1 (en) * 2019-12-23 2020-09-23 Общество с ограниченной ответственностью "Газпром добыча Уренгой" Method of emptying and recycling gas from process line of low-temperature separation plant

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618876B1 (en) * 1987-07-30 1989-10-27 Inst Francais Du Petrole PROCESS FOR TREATING AND TRANSPORTING A GAS CONTAINING METHANE AND WATER
FR2625548B1 (en) * 1987-12-30 1990-06-22 Inst Francais Du Petrole PROCESS FOR DELAYING FORMATION AND / OR REDUCING THE TENDENCY TO AGGLOMERATION OF HYDRATES
FR2625547B1 (en) * 1987-12-30 1990-06-22 Inst Francais Du Petrole PROCESS FOR DELAYING FORMATION AND / OR REDUCING THE TENDENCY TO AGGLOMERATION OF HYDRATES
US5315832A (en) * 1993-02-12 1994-05-31 Process System International, Inc. Process for the recovery of a light hydrocarbon fraction from marine loading operations
NO941704L (en) * 1994-05-06 1995-11-07 Kvaerner Process Systems As Removal and recovery of volatile organic constituents, e.g. when loading crude oil
US5788745A (en) * 1995-06-07 1998-08-04 Phillips Petroleum Company Process and apparatus for vapor recovery
FR2771020B1 (en) * 1997-11-19 1999-12-31 Inst Francais Du Petrole DEVICE AND METHOD FOR TREATING A FLUID BY DIPHASIC COMPRESSION AND FRACTIONATION
NO20044585D0 (en) * 2004-10-25 2004-10-25 Sargas As Methods and facilities for transporting rich gas
NO324110B1 (en) * 2005-07-05 2007-08-27 Aker Subsea As System and process for cleaning a compressor, to prevent hydrate formation and/or to increase compressor performance.
US8445737B2 (en) * 2007-02-16 2013-05-21 Shell Oil Company Method and apparatus for reducing additives in a hydrocarbon stream
GB2458055B (en) * 2007-02-16 2011-06-08 Shell Int Research Method and apparatus for reducing additives in a hydrocarbon stream
NO330845B1 (en) * 2009-10-22 2011-07-25 Aker Subsea As Method of Liquid Treatment by Wellstream Compression.
EP2817397B1 (en) * 2012-02-23 2019-07-31 FMC Kongsberg Subsea AS Offshore processing method and system
US9512700B2 (en) * 2014-11-13 2016-12-06 General Electric Company Subsea fluid processing system and an associated method thereof
FR3102685B1 (en) * 2019-11-06 2021-10-29 Ifp Energies Now Olefin oligomerization process in an oligomerization reactor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2273177A1 (en) * 1974-05-31 1975-12-26 Mitsubishi Electric Corp Gas compression method and process plant - has gas-liquid mix preparatory, circulating pump and gas separator unit
US4132535A (en) * 1976-11-17 1979-01-02 Western Chemical Company Process for injecting liquid in moving natural gas streams
FR2417057A1 (en) * 1978-02-14 1979-09-07 Inst Francais Du Petrole METHOD AND DEVICE FOR TRANSPORTING BY PIPELINE A FLUID CONSISTING OF ESSENTIAL GAS MASS
GB1561454A (en) * 1976-12-20 1980-02-20 Inst Francais Du Petrole Devices for pumping a fluid comprising at least a liquid
US4416333A (en) * 1982-04-20 1983-11-22 Shell Oil Company Corrosion inhibiting process for a remotely located deep corrosive gas well

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133875A (en) * 1956-12-01 1964-05-19 Hoechst Ag Process for removing fogs and vapors from gases and gas mixtures
US2947379A (en) * 1958-04-21 1960-08-02 Nat Tank Co Petroleum vapor recovery system
US3256676A (en) * 1960-11-08 1966-06-21 Max Planck Gesellschaft Pumping process employing a liquid sorbent
US3322411A (en) * 1965-03-29 1967-05-30 Lester P Moore Gas and liquid contact apparatus
US3634998A (en) * 1969-12-29 1972-01-18 Edwin B Patterson Methods of producing a plurality of well streams
US3676981A (en) * 1971-02-24 1972-07-18 Phillips Petroleum Co Treatment of hydrocarbon gases
US3994074A (en) * 1975-04-18 1976-11-30 W. R. Grace & Co. Liquid seal pump with sulfuric acid dehumidification
US4282013A (en) * 1977-11-14 1981-08-04 Chevron Research Company Vacuum pump operation in a maleic anhydride recovery system
DE2832401C3 (en) * 1978-07-24 1981-04-02 Siemens AG, 1000 Berlin und 8000 München Liquid ring pump assembly
DE2943130A1 (en) * 1978-11-09 1981-05-07 Linde Ag, 6200 Wiesbaden METHOD FOR REMOVING UNWANTED GAS-SHAPED COMPONENTS FROM HOT EXHAUST GAS
US4273562A (en) * 1979-10-01 1981-06-16 A. Ahlstrom Osakeyhtio Method and apparatus for pumping gaseous liquids and separating the gaseous components therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2273177A1 (en) * 1974-05-31 1975-12-26 Mitsubishi Electric Corp Gas compression method and process plant - has gas-liquid mix preparatory, circulating pump and gas separator unit
US4132535A (en) * 1976-11-17 1979-01-02 Western Chemical Company Process for injecting liquid in moving natural gas streams
GB1561454A (en) * 1976-12-20 1980-02-20 Inst Francais Du Petrole Devices for pumping a fluid comprising at least a liquid
FR2417057A1 (en) * 1978-02-14 1979-09-07 Inst Francais Du Petrole METHOD AND DEVICE FOR TRANSPORTING BY PIPELINE A FLUID CONSISTING OF ESSENTIAL GAS MASS
US4416333A (en) * 1982-04-20 1983-11-22 Shell Oil Company Corrosion inhibiting process for a remotely located deep corrosive gas well

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657416A1 (en) * 1990-01-23 1991-07-26 Inst Francais Du Petrole METHOD AND DEVICE FOR TRANSPORTING AND PROCESSING NATURAL GAS
EP0442767A1 (en) * 1990-01-23 1991-08-21 Institut Francais Du Petrole Method and apparatus for treating a natural gas
FR2735211A1 (en) * 1995-06-06 1996-12-13 Inst Francais Du Petrole PROCESS FOR TRANSPORTING A FLUID SUCH AS A DRY GAS, LIKELY TO FORM HYDRATES
FR2735210A1 (en) * 1995-06-06 1996-12-13 Inst Francais Du Petrole PROCESS FOR RECYCLING A DISPERSING ADDITIVE USED FOR THE TRANSPORT OF A CONDENSATE GAS OR OF A PETROLEUM WITH ASSOCIATED GAS IN THE PRESENCE OF HYDRATES
US5816280A (en) * 1995-06-06 1998-10-06 Institut Francais Du Petrole Process for transporting a fluid such as a dry gas likely to form hydrates
US5877361A (en) * 1995-06-06 1999-03-02 Institute Francais Du Petrole Process for recycling a dispersing additive used for the transportation of a condensate gas or of an oil with associated gas in the presence of hydrates
RU2732862C1 (en) * 2019-12-23 2020-09-23 Общество с ограниченной ответственностью "Газпром добыча Уренгой" Method of emptying and recycling gas from process line of low-temperature separation plant

Also Published As

Publication number Publication date
FR2570162A1 (en) 1986-03-14
FR2570162B1 (en) 1988-04-08
EP0178962B1 (en) 1989-05-24
US4948394A (en) 1990-08-14
NO160876C (en) 1989-06-07
NO160876B (en) 1989-02-27
NO853496L (en) 1986-03-10
CA1301216C (en) 1992-05-19
DE3570508D1 (en) 1989-06-29
AR244315A1 (en) 1993-10-29
JPS6188098A (en) 1986-05-06

Similar Documents

Publication Publication Date Title
EP0178962B1 (en) Method and apparatus for the compression and transportation of a gas comprising a liquid fraction
FR2899288A1 (en) METHOD AND DEVICE FOR COMPRESSION OF A MULTIPHASIC FLUID
FR2465698A1 (en) PROCESS FOR THE RECOVERY OF HYDROCARBONS FROM A MIXTURE OF HYDROCARBONS AND CARRIER GAS AND, ESPECIALLY, RECOVERY OF METHANE INTO COAL MINES WITH POSSIBLE DECONTAMINATION OF THE AMBIENT AIR
EP0848982B1 (en) Method and apparatus for treating a gas by refrigeration and contacting with a solvent
EP1119686B1 (en) Method and system for separating and injecting gas and water in a wellbore
EP0665046B1 (en) Process of pre-treatment of natural gas containing H2S
EP0532397A1 (en) Continuous mixing device, process and use in a pumping plant for high viscosity fluid
CA1094826A (en) Method and apparatus for recuperating hard to pump materials
CH619028A5 (en)
CA1256016A (en) Water degassing process
FR2760653A1 (en) DEACIDIFICATION PROCESS WITH PRODUCTION OF ACID GAS IN LIQUID PHASE
CN108862466B (en) Equipment and method for pre-separating oily sewage based on axial vortex technology
EP0917905B1 (en) Process and device for diphasic compression for the treatment of oil products
LU84260A1 (en) WASTE OIL RECOVERY PROCESS
CA2258350A1 (en) Wet gas compression device with an integrated compression/separation phase
EP0246943B1 (en) Process and installation to cause circulation of fluids by pumping
CA3006784A1 (en) Method of removing co2 from a contaminated hydrocarbon stream
EP0246261A1 (en) Gaseous fluid compressor associated to a gas-liquid separator
FR2514071A1 (en) PROCESS FOR PRODUCING HYDROCARBON DEPOSITS WITH INJECTION OF EFFLUENTS INTO THE DEPOSIT OR IN THE WELL (S) AND INSTALLATION FOR CARRYING OUT SAID METHOD
CA2252032C (en) Means and method for treatment of a liquid by diphasic compression and fractionation
CA1054072A (en) Foam killing device
FR2656035A1 (en) Device for pumping a liquid, and in particular a liquid having high viscosity
CN115678628B (en) Device, system and method for recovering carbon dioxide from associated gas-liquid by carbon dioxide flooding
FR2525495A1 (en) SLUDGE CONCENTRATOR AND METHOD OF USE
FR2828817A1 (en) DEVICE FOR ABSORBING A COMPOUND IN A GASEOUS EFFLUENT, WITH IMPROVED YIELD

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT NL

17P Request for examination filed

Effective date: 19860516

17Q First examination report despatched

Effective date: 19870615

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT NL

REF Corresponds to:

Ref document number: 3570508

Country of ref document: DE

Date of ref document: 19890629

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19921022

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930826

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930930

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940906

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee