EP1180066A1 - Optimised scraper for a conduit - Google Patents

Optimised scraper for a conduit

Info

Publication number
EP1180066A1
EP1180066A1 EP00920850A EP00920850A EP1180066A1 EP 1180066 A1 EP1180066 A1 EP 1180066A1 EP 00920850 A EP00920850 A EP 00920850A EP 00920850 A EP00920850 A EP 00920850A EP 1180066 A1 EP1180066 A1 EP 1180066A1
Authority
EP
European Patent Office
Prior art keywords
disc
polymer
reinforcing means
scraping
pipe
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
EP00920850A
Other languages
German (de)
French (fr)
Other versions
EP1180066B1 (en
Inventor
Fabrice Dal Maso
Bernard Dewimille
Adrien Braccolino
Lucien Montabord
Frédéric PELLETIER
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.)
John Bean Technologies NV
IFP Energies Nouvelles IFPEN
FMC Technologies SAS
Original Assignee
FMC Europe NV
IFP Energies Nouvelles IFPEN
FMC Europe SA
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 FMC Europe NV, IFP Energies Nouvelles IFPEN, FMC Europe SA filed Critical FMC Europe NV
Publication of EP1180066A1 publication Critical patent/EP1180066A1/en
Application granted granted Critical
Publication of EP1180066B1 publication Critical patent/EP1180066B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0553—Cylindrically shaped pigs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0557—Pigs with rings shaped cleaning members, e.g. cup shaped pigs

Definitions

  • the invention relates to a bidirectional scraper for a fluid distribution pipe.
  • the invention is particularly well suited to resist both significant chemical attack and abrasion.
  • scraper plugs When the same pipe is used to successively distribute different fluids, it is known to use scraper plugs to separate the fluids between them while cleaning the walls of the pipe as well as possible. These scrapers can also be moved over the entire length of the pipe to remove deposits that may have formed on the internal walls at regular intervals.
  • Document EP-376796 discloses a bidirectional scraper, the elastomeric wear segments of which do not have sufficient chemical resistance and abrasion resistance for certain applications.
  • the present invention relates to a bidirectional scraper device for a fluid distribution pipe.
  • the device comprises at least one thin polymer disc stiffened by reinforcing means, and the disc is cut into petals by at least two radial slots of length less than the radius of said disc, said radius being substantially greater than the inside diameter of said pipe.
  • a second thin disc can be superimposed on the first so that the slots of the two discs are staggered relative to each other.
  • Two sealing and scraping assemblies each consisting of at least one thin disc, can be linked by a shaft and two end pieces so as to space said two assemblies about the length of said shaft.
  • the assemblies may have a thickness less than the space between the shaft and the end pieces so that said thin disks can flex in both directions.
  • the scraping and sealing assembly may also comprise at least one disc of unreinforced polymer.
  • the reinforcing means can be metallic.
  • the reinforcement means may be made of composite material.
  • the reinforcing means may consist of a radially split disc.
  • the reinforcing means can be constituted by a split disc in the same way as the scraping and sealing polymer disc.
  • the reinforcing means can be embedded in the polymer disc.
  • the reinforcing means can be pressed against the polymer disc.
  • the polymer can be a thermoplastic of the polyamide, polyethylene, fluoropolymer type, for example PEUHMW, ETFE, FEP,
  • PNDF PNDF
  • ECTFE ECTFE
  • PFA PTFE
  • PEEK thermosetting
  • elastomer elastomer
  • the polymer can be loaded with abrasion resistant material.
  • the invention also relates to the application of the device to scraping and / or to the separation between two fluids, in a pipe for dispensing fluids chemically aggressive with respect to elastomers.
  • the invention is therefore based on a design using different means to perform two main functions: • polymer elements to perform the scraping, sealing and abrasion resistance functions in contact with the pipe,
  • reinforcing means for example "spring” steel or composite to provide sufficient rigidity for the function of maintaining contact with the wall of the tube, in particular when passing the elbows and when changing the direction of scraping.
  • FIG. 1 shows in schematic section an embodiment of a scraper according to the invention
  • FIG. 1A schematically shows another embodiment
  • FIG. 2 shows in front view an example of a scraping disc
  • FIG. 2A shows the superposition of two scraper discs
  • Figure 2B shows several variants for the reinforcing means
  • Figure 3 shows in partial section the deformations of a scraper disc during a change of direction.
  • FIG. 1 describes a scraper 1 comprising a central body 2 comprised between two end pieces 3, generally identical insofar as the scraper is bidirectional, but this configuration is not a limitation of the present invention.
  • These elements have for main functions the fixing of the scraping elements and the guidance of the scraper during its movement in the pipe and through elbows.
  • the shape of the end pieces can be adapted to allow the scraper to be stopped against any stopping device without damage.
  • the assembly of these three parts is such that in each of the two spaces 4, scraping discs 5 are stacked. These discs are thin, with an outside diameter slightly greater than the inside diameter of the pipe to be scraped.
  • the clearances j between the discs and the body 2 or the end pieces 3 are generally necessary so that the discs can deform in bending and / or buckling during the introduction of the scraper in the pipe, and during changes of direction. scraping.
  • the function of the clearances j will appear more clearly in FIG. 3.
  • the number of superimposed discs can be chosen as a function of the scraping efficiency sought or the level of longitudinal sealing which is required.
  • discs of the stack may not include reinforcing means and be made of material promoting sealing between discs without having a mechanical function to ensure. We can use such split sealing discs as the scraper disc, or not split.
  • FIG. 1A describes a scraper 25 mainly consisting of two stacks 26 of scraper discs.
  • a shaft 27 serves as a spacer between the two stacks and as a fixing means by cooperating with two end pieces 28, the shape of which can make it possible to improve the centering and the guiding of the scraper in the pipe.
  • the discs are made from a reinforcing core 8 sheathed in plastic.
  • the diameter of the plastic sheath is such that the disc has an outer ring of plastic alone which constitutes the sealing and wear lip.
  • the discs are subjected to compressive and bending forces, which are restored on the internal surface of the tube in the form of contact and friction forces. These forces make it possible to ensure the sealing and the scraping of the internal wall of the tube.
  • Figure 2 shows, in front view, a scraper disc having slots 11 in a radial direction so as to cut the disc into several "petals" 6.
  • the reinforcing core is also split.
  • a part 7 of width l is made of polymer alone. That is to say that the outside diameter of the reinforcement 8 is less than the outside diameter of the scraper disc.
  • the reinforcement 8 has a central bore 9 for assembly on the shaft or the body of the scraper.
  • the reinforcing core may be metallic in spring steel, titanium or nickel alloy, or a sufficiently rigid material so as to play the role of stiffening reinforcement of the entire scraping disc, for example of composite material or equivalent.
  • the radius Rr of the reinforcement is determined, taking into account the internal radius of the pipe, so as to reinforce the zone of the disc which supports the most stress during the bending of the disc placed in the pipe, during the passage of an elbow or during the change of scraping direction.
  • the outside diameter of the reinforcement is preferably less than the inside diameter of the pipe.
  • a certain number of perforations 10 can make it possible to strengthen the attachment of the plastic to the reinforcing core.
  • the reinforcing core can be overmolded by the plastic material, or possibly pressed, for example by gluing, on the disc so as to secure the reinforcing core to the plastic disc.
  • FIG. 2B describes other possible embodiments of the reinforcing means.
  • the reference 30 designates a reinforcement constituted by wires arranged radially and embedded in the plastic. The stiffness and the number of wires determine the level of reinforcement of the disc 6. In the center 31, the end of each wire can be maintained by washers carried by the axis of the scraper.
  • Reference 32 shows a reinforcing core formed by a series of radial blades. The stiffness of a reinforcing disc, metallic or composite, can in fact be reduced by cutting out a certain number of radial slots.
  • the reinforced petal 33 is constituted by polymer reinforced by a weaving, steel wires, fibers of glass, or equivalent. The reinforcing fabric has a surface and a thickness determined to obtain the desired stiffness of the petal.
  • FIG. 2A shows the method of superimposing two discs 21 and 22 (shown in dashed line).
  • the slots 23 and 24 respectively of each disc must not coincide in order to substantially reconstitute a plastic washer by the combination of two discs.
  • one of the two discs may not have any reinforcement, therefore be entirely made of polymer, or any other suitable material, preferably split into "petals" also, but this is not an obligation in the present invention.
  • This disc mainly only performs the sealing function.
  • this polymer disc alone, or any other suitable material is placed between two reinforced discs.
  • Example The discs with the following geometry were tested for leaktightness and alternating displacement in a pipe with an internal radius of 53.5 mm:
  • the radius of the disc can be included in the range of 54 and 58 mm, preferably between 55 and 57 mm for a pipe with an internal radius of 53.5 mm.
  • the disc is cut into eight equal width petals.
  • FIG. 3 describes the deformation of a disc during a change of scraping direction in the internal duct 12.
  • the position of the blade 13 shows the deformation of a disc when the scraper is introduced into the pipe in the directions indicated by the reference 14.
  • each disc flexes and flames according to the deformations represented by sections 15 and 16, to then take the final shape 17, symmetrical to the shape 13.
  • the silhouettes of stops 18 and 19 demonstrate the utility and the role of the games j of figure 1.
  • the distance d during the buckling of the disc in reversal shows that it requires a sufficient play, dependent on the geometry of the disc and its reinforcement, so that the disc admits a reversal of the scraping direction.
  • the wear of the head of the plastic petals causes a reduction in the length of the strip and consequently a change in the contact forces against the wall.
  • the wear of the head therefore directly conditions the life of the scraper.
  • the formulation of the basic plastic can be improved, for example by loading it with abrasion-resistant particles, or by mixing it with another polymer, for example PTFE. It is also possible, for example, to load the plastic with short carbon fibers.
  • the present invention thus allows the constitution of a scraper optimized from the point of view of wear and resistance to aggressive fluids, but also from the point of view of implementation. Indeed, for the same pipe, one can choose to superimpose the number of necessary discs according to the operational situation: viscous fluid or not, charged or not, tight separation, etc.
  • the repair of a scraper could only consist of a change of a single disc and not of the complete set of sealing and scraping stacking.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Pipeline Systems (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Paper (AREA)
  • Die Bonding (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Centrifugal Separators (AREA)
  • Lubricants (AREA)
  • Liquid Crystal Substances (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A two-directional scraping device (1;25) intended for a fluid carrying pipe includes at least one thin disk (6) made of polymer stiffened by reinforcing means (8) secured to the disk. The disk, including the reinforcement, is divided into petals by at least two radial slots (11) whose length is smaller than the radius of the disk, the radius of the disk being substantially greater than the inside diameter of said pipe.

Description

RACLEUR OPTIMISE POUR CONDUITEOPTIMIZED SCRAPER FOR DRIVING
L'invention concerne un racleur bidirectionnel pour conduite de distribution de fluides. L'invention est notamment bien adaptée pour résister à la fois à des agressions chimiques importantes et à l'abrasion. Lorsqu'une même conduite est utilisée pour successivement distribuer des fluides différents, il est connu d'utiliser des bouchons racleurs pour séparer les fluides entre eux tout en nettoyant au mieux les parois de la conduite. On peut également déplacer ces racleurs sur toute la longueur de la conduite pour retirer à intervalle régulier les dépôts qui peuvent s'être formés sur les parois internes. On connaît par le document EP-376796 un racleur bidirectionnel dont les segments d'usure en élastomère ne présentent pas une résistance chimique et une résistance à l'abrasion suffisante pour certaines applications.The invention relates to a bidirectional scraper for a fluid distribution pipe. The invention is particularly well suited to resist both significant chemical attack and abrasion. When the same pipe is used to successively distribute different fluids, it is known to use scraper plugs to separate the fluids between them while cleaning the walls of the pipe as well as possible. These scrapers can also be moved over the entire length of the pipe to remove deposits that may have formed on the internal walls at regular intervals. Document EP-376796 discloses a bidirectional scraper, the elastomeric wear segments of which do not have sufficient chemical resistance and abrasion resistance for certain applications.
Pour pallier cet inconvénient, il apparaît avantageux de combiner des éléments de renfort mécanique avec des éléments d'étanchéité et de raclage.To overcome this drawback, it appears advantageous to combine mechanical reinforcement elements with sealing and scraping elements.
Ainsi, la présente invention concerne un dispositif de raclage bidirectionnel pour une conduite de distribution de fluide. Le dispositif comporte au moins un disque mince en polymère rigidifié par des moyens de renfort, et le disque est découpé en pétales par au moins deux fentes radiales de longueur inférieure au rayon dudit disque, ledit rayon étant sensiblement supérieur au diamètre intérieur de ladite conduite. Un deuxième disque mince peur être superposé sur le premier de façon telle que les fentes des deux disques soient disposées en quinconce les unes par rapport aux autres.Thus, the present invention relates to a bidirectional scraper device for a fluid distribution pipe. The device comprises at least one thin polymer disc stiffened by reinforcing means, and the disc is cut into petals by at least two radial slots of length less than the radius of said disc, said radius being substantially greater than the inside diameter of said pipe. A second thin disc can be superimposed on the first so that the slots of the two discs are staggered relative to each other.
Deux ensembles d'étanchéité et de raclage constitués chacun par au moins un disque mince peuvent être liés par un arbre et deux pièces d'extrémité de façon à espacer lesdits deux ensembles d'environ la longueur dudit arbre.Two sealing and scraping assemblies, each consisting of at least one thin disc, can be linked by a shaft and two end pieces so as to space said two assemblies about the length of said shaft.
Les ensembles peuvent avoir une épaisseur inférieure à l'espace compris entre l'arbre et les pièces d'extrémité de façon que lesdits disques minces puissent fléchir dans les deux sens.The assemblies may have a thickness less than the space between the shaft and the end pieces so that said thin disks can flex in both directions.
L'ensemble de raclage et d'étanchéité peut comporter, en outre, au moins un disque en polymère non renforcé.The scraping and sealing assembly may also comprise at least one disc of unreinforced polymer.
Les moyens de renfort peuvent être métalliques.The reinforcing means can be metallic.
Dans une variante, les moyens de renforts peuvent être en matériau composite.In a variant, the reinforcement means may be made of composite material.
Les moyens de renforts peuvent être constitués par un disque fendu radialement.The reinforcing means may consist of a radially split disc.
Les moyens de renfort peuvent être constitués par un disque fendu de la même façon que le disque en polymère de raclage et d'étanchéité.The reinforcing means can be constituted by a split disc in the same way as the scraping and sealing polymer disc.
Les moyens de renfort peuvent être noyés dans le disque en polymère.The reinforcing means can be embedded in the polymer disc.
Les moyens de renforts peuvent être plaqués sur le disque en polymère. Le polymère peut être un thermoplastique de type polyamide, polyéthylène, polymère fluoré, par exemple PEUHMW, ETFE, FEP,The reinforcing means can be pressed against the polymer disc. The polymer can be a thermoplastic of the polyamide, polyethylene, fluoropolymer type, for example PEUHMW, ETFE, FEP,
PNDF, ECTFE, PFA, PTFE, PEEK, et leur mélange; un thermodurcissable, par exemple l'époxy ou le polyuréthanne; un élastomère.PNDF, ECTFE, PFA, PTFE, PEEK, and their mixture; a thermosetting, for example epoxy or polyurethane; an elastomer.
Le polymère peut être chargé de matériau résistant à l'abrasion.The polymer can be loaded with abrasion resistant material.
L'invention concerne également l'application du dispositif au raclage et/ou à la séparation entre deux fluides, dans une conduite de distribution de fluides chimiquement agressifs vis-à-vis des élastomères.The invention also relates to the application of the device to scraping and / or to the separation between two fluids, in a pipe for dispensing fluids chemically aggressive with respect to elastomers.
L'invention est donc fondée sur une conception utilisant des moyens différents pour assurer deux fonctions principales : • des éléments en polymère pour assurer les fonctions de raclage, d'étanchéité et de résistance à l'abrasion au contact de la conduite,The invention is therefore based on a design using different means to perform two main functions: • polymer elements to perform the scraping, sealing and abrasion resistance functions in contact with the pipe,
• des moyens de renfort, par exemple en acier "à ressort" ou en composite pour assurer une rigidité suffisante pour la fonction de maintien en contact avec la paroi du tube, en particulier au passage des coudes et lors des changements de sens de raclage.• reinforcing means, for example "spring" steel or composite to provide sufficient rigidity for the function of maintaining contact with the wall of the tube, in particular when passing the elbows and when changing the direction of scraping.
La présente invention sera mieux comprise et ses avantages apparaîtront plus clairement à la lecture des exemples suivants, nullement limitatifs, illustrés par les figures ci-annexées, parmi lesquelles:The present invention will be better understood and its advantages will appear more clearly on reading the following examples, which are in no way limitative, illustrated by the appended figures, among which:
• la figure 1 montre en coupe schématique une réalisation d'un racleur selon l'invention,FIG. 1 shows in schematic section an embodiment of a scraper according to the invention,
• la figure 1A montre schématiquement un autre mode de réalisation,FIG. 1A schematically shows another embodiment,
• la figure 2 montre en vue de face un exemple de disque de raclage, • la figure 2A montre la superposition de deux disques de raclage,FIG. 2 shows in front view an example of a scraping disc, FIG. 2A shows the superposition of two scraper discs,
• la figure 2B montre plusieurs variantes pour les moyens de renfort, • la figure 3 montre en coupe partielle les déformations d'un disque de raclage lors d'un changement de sens.• Figure 2B shows several variants for the reinforcing means, • Figure 3 shows in partial section the deformations of a scraper disc during a change of direction.
La figure 1 décrit un racleur 1 comprenant un corps central 2 compris entre deux pièces d'extrémité 3, généralement identiques dans la mesure où le racleur est bidirectionnel, mais cette configuration n'est pas une limitation de la présente invention. Ces éléments ont pour fonctions principales la fixation des éléments de raclage et le guidage du racleur lors de son déplacement dans la conduite et à travers des coudes. La forme des pièces d'extrémité peut être adaptée pour permettre de stopper le racleur contre tout dispositif d'arrêt sans endommagement. L'assemblage de ces trois pièces est tel que dans chacun des deux espaces 4, on empile des disques de raclage 5. Ces disques sont de faible épaisseur, de diamètre extérieur légèrement supérieur au diamètre intérieur de la conduite à racler. Les jeux j entre les disques et le corps 2 ou les pièces d'extrémité 3 sont généralement nécessaires pour que les disques puissent se déformer en flexion et/ou flambage lors de l'introduction du racleur dans la conduite, et lors des changements de sens de raclage. La fonction des jeux j apparaîtra plus clairement sur la figure 3. Le nombre de disques superposés peut être choisi en fonction de l'efficacité de raclage recherchée ou du niveau d'étanchéité longitudinale dont on a besoin. Dans certaines variantes, des disques de l'empilage peuvent ne pas comporter de moyens de renfort et être en matériau favorisant l'étanchéité entre disques sans avoir de fonction mécanique à assurer. On pourra utiliser de tels disques d'étanchéité fendus comme le disque de raclage, ou non fendus.FIG. 1 describes a scraper 1 comprising a central body 2 comprised between two end pieces 3, generally identical insofar as the scraper is bidirectional, but this configuration is not a limitation of the present invention. These elements have for main functions the fixing of the scraping elements and the guidance of the scraper during its movement in the pipe and through elbows. The shape of the end pieces can be adapted to allow the scraper to be stopped against any stopping device without damage. The assembly of these three parts is such that in each of the two spaces 4, scraping discs 5 are stacked. These discs are thin, with an outside diameter slightly greater than the inside diameter of the pipe to be scraped. The clearances j between the discs and the body 2 or the end pieces 3 are generally necessary so that the discs can deform in bending and / or buckling during the introduction of the scraper in the pipe, and during changes of direction. scraping. The function of the clearances j will appear more clearly in FIG. 3. The number of superimposed discs can be chosen as a function of the scraping efficiency sought or the level of longitudinal sealing which is required. In some variants, discs of the stack may not include reinforcing means and be made of material promoting sealing between discs without having a mechanical function to ensure. We can use such split sealing discs as the scraper disc, or not split.
La figure 1A décrit un racleur 25 constitué principalement de deux empilages 26 de disques de raclage. Un arbre 27 sert d'entretoise entre les deux empilages et de moyen de fixation en coopérant avec deux pièces d'extrémité 28, dont la forme peut permettre d'améliorer le centrage et le guidage du racleur dans la conduite. On a mis en évidence sur cette figure la présence des jeux j qui autorisent la déformation nécessaire des disques en opération dans la conduite.FIG. 1A describes a scraper 25 mainly consisting of two stacks 26 of scraper discs. A shaft 27 serves as a spacer between the two stacks and as a fixing means by cooperating with two end pieces 28, the shape of which can make it possible to improve the centering and the guiding of the scraper in the pipe. We highlighted in this figure the presence of clearances j which allow the necessary deformation of the discs in operation in the pipe.
Les disques, décrits plus précisément par la figure 2, sont fabriqués à partir d'une âme de renfort 8 gainée de matière plastique. Le diamètre de la gaine de plastique est tel que le disque comporte une couronne extérieure en plastique seul qui constitue la lèvre d'étanchéité et d'usure. Les disques sont soumis à des efforts de compression et de flexion, lesquels sont restitués sur la surface interne du tube sous la forme de forces de contact et de frottement. Ces forces permettent d'assurer l'étanchéité et le raclage de la paroi interne du tube.The discs, described more precisely in FIG. 2, are made from a reinforcing core 8 sheathed in plastic. The diameter of the plastic sheath is such that the disc has an outer ring of plastic alone which constitutes the sealing and wear lip. The discs are subjected to compressive and bending forces, which are restored on the internal surface of the tube in the form of contact and friction forces. These forces make it possible to ensure the sealing and the scraping of the internal wall of the tube.
La figure 2 montre, en vue de face, un disque de raclage comportant des fentes 11 selon une direction radiale de façon à découper le disque en plusieurs "pétales" 6. L'âme de renfort est également fendue. Sur l'extérieur d'un pétale, une partie 7 de largeur l est en polymère seul. C'est-à-dire que le diamètre extérieur du renfort 8 est inférieur au diamètre extérieur du disque de raclage. Ainsi, un disque peut être usé par abrasion sur la surface interne de la conduite sans que sa fonction d'étanchéité et de raclage soit trop rapidement supprimée. Le renforcement 8 comporte un perçage central 9 pour l'assemblage sur l'arbre ou le corps du racleur. L'âme de renfort peut être métallique en acier à ressort, en titane ou alliage de nickel, ou en matériau suffisamment rigide de façon à jouer le rôle de renfort de rigidité de l'ensemble du disque de raclage, par exemple en matériau composite ou équivalent. Le rayon Rr du renfort est déterminé, compte tenu du rayon interne la conduite, de manière à renforcer la zone du disque qui supporte le plus de contrainte lors du fléchissement du disque placé dans la conduite, lors du passage d'un coude ou lors du changement de sens de raclage. Le diamètre extérieur du renfort est, de préférence, inférieur au diamètre interne de la conduite. Un certain nombre de perforations 10 peuvent permettre de renforcer l'accrochage du plastique sur l'âme de renfort. L'âme de renfort peut être surmoulée par la matière plastique, ou éventuellement plaquée, par exemple par collage, sur le disque de façon à solidariser l'âme de renfort au disque en matière plastique.Figure 2 shows, in front view, a scraper disc having slots 11 in a radial direction so as to cut the disc into several "petals" 6. The reinforcing core is also split. On the outside of a petal, a part 7 of width l is made of polymer alone. That is to say that the outside diameter of the reinforcement 8 is less than the outside diameter of the scraper disc. Thus, a disc can be worn by abrasion on the internal surface of the pipe without its sealing and scraping function being too quickly removed. The reinforcement 8 has a central bore 9 for assembly on the shaft or the body of the scraper. The reinforcing core may be metallic in spring steel, titanium or nickel alloy, or a sufficiently rigid material so as to play the role of stiffening reinforcement of the entire scraping disc, for example of composite material or equivalent. The radius Rr of the reinforcement is determined, taking into account the internal radius of the pipe, so as to reinforce the zone of the disc which supports the most stress during the bending of the disc placed in the pipe, during the passage of an elbow or during the change of scraping direction. The outside diameter of the reinforcement is preferably less than the inside diameter of the pipe. A certain number of perforations 10 can make it possible to strengthen the attachment of the plastic to the reinforcing core. The reinforcing core can be overmolded by the plastic material, or possibly pressed, for example by gluing, on the disc so as to secure the reinforcing core to the plastic disc.
Il est clair que cette forme fendue ne conduit pas alors à une structure étanche en elle-même, comme le serait une coupelle de racleur selon l'art antérieur. La découpe radiale du disque est cependant indispensable pour que chaque disque admette la déformation nécessaire au bon fonctionnement dans la conduite.It is clear that this split form does not then lead to a sealed structure in itself, as would be a scraper cup according to the prior art. Radial cutting of the disc is however essential so that each disc admits the deformation necessary for proper operation in the pipe.
La figure 2B décrit d'autres réalisations possibles des moyens de renfort. La référence 30 désigne un renfort constitué par des fils disposés radialement et noyés dans le plastique. La raideur et le nombre de fils déterminent le niveau de renforcement du disque 6. Dans le centre 31, l'extrémité de chaque fil peut être maintenue par des rondelles portées par l'axe du racleur. La référence 32 montre une âme de renfort constituée par une série de lames radiales. La rigidité d'un disque de renfort, métallique ou composite, peut en effet être diminuée par la découpe d'un certain nombre de fentes radiales. Le pétale renforcé 33 est constitué par du polymère renforcé par un tissage, fils d'acier, fibres de verre, ou équivalent. Le tissu de renfort a une surface et une épaisseur déterminées pour obtenir la rigidité désiré du pétale.FIG. 2B describes other possible embodiments of the reinforcing means. The reference 30 designates a reinforcement constituted by wires arranged radially and embedded in the plastic. The stiffness and the number of wires determine the level of reinforcement of the disc 6. In the center 31, the end of each wire can be maintained by washers carried by the axis of the scraper. Reference 32 shows a reinforcing core formed by a series of radial blades. The stiffness of a reinforcing disc, metallic or composite, can in fact be reduced by cutting out a certain number of radial slots. The reinforced petal 33 is constituted by polymer reinforced by a weaving, steel wires, fibers of glass, or equivalent. The reinforcing fabric has a surface and a thickness determined to obtain the desired stiffness of the petal.
Pour obtenir une étanchéité du racleur, on empile au moins deux disques de raclage et d'étanchéité géométriquement identiques de façon que les fentes 11 soient en quinconce d'un disque à l'autre. La figure 2 A montre la méthode de superposition de deux disques 21 et 22 (représenté en ligne tiretée). Les fentes 23 et 24 respectivement de chaque disque ne doivent pas coïncider afin de sensiblement reconstituer une rondelle en plastique par la combinaison de deux disques. Il est clair que l'un des deux disques peut ne pas comporter de renfort, donc être entièrement en polymère, ou tout autre matériau adéquat, de préférence fendu en "pétales" également, mais ce n'est pas une obligation dans la présente invention. Ce disque n'assure principalement que la fonction d'étanchéité. De préférence, ce disque en polymère seul, ou tout autre matériau adéquat, est placé entre deux disques renforcés.To obtain a sealing of the scraper, at least two geometrically identical scraper and sealing discs are stacked so that the slots 11 are staggered from one disc to another. Figure 2A shows the method of superimposing two discs 21 and 22 (shown in dashed line). The slots 23 and 24 respectively of each disc must not coincide in order to substantially reconstitute a plastic washer by the combination of two discs. It is clear that one of the two discs may not have any reinforcement, therefore be entirely made of polymer, or any other suitable material, preferably split into "petals" also, but this is not an obligation in the present invention. . This disc mainly only performs the sealing function. Preferably, this polymer disc alone, or any other suitable material, is placed between two reinforced discs.
Exemple: Les disques de géométrie suivante ont été testés en étanchéité et en déplacement alterné dans une conduite de rayon intérieur 53,5 mm:Example: The discs with the following geometry were tested for leaktightness and alternating displacement in a pipe with an internal radius of 53.5 mm:
• épaisseur du disque gainé : 2 mm; • épaisseur du renfort en acier à ressort : 0,1 mm;• thickness of the sheathed disc: 2 mm; • thickness of the spring steel reinforcement: 0.1 mm;
• rayon du ressort : 40 à 45 mm;• spring radius: 40 to 45 mm;
• largeur l de couronne plastique : 9 à 18 mm;• width l of plastic crown: 9 to 18 mm;
Le rayon du disque peut être compris dans la fourchette de 54 et 58 mm, de préférence entre 55 et 57 mm pour une conduite de rayon interne 53,5 mm.The radius of the disc can be included in the range of 54 and 58 mm, preferably between 55 and 57 mm for a pipe with an internal radius of 53.5 mm.
Le disque est découpé en huit pétales d'égale largeur.The disc is cut into eight equal width petals.
La figure 3 décrit la déformation d'un disque lors d'un changement de sens de raclage dans le conduit interne 12. La position de la lame 13 montre la déformation d'un disque lorsque le racleur est introduit dans la conduite dans les sens indiqué par la référence 14.FIG. 3 describes the deformation of a disc during a change of scraping direction in the internal duct 12. The position of the blade 13 shows the deformation of a disc when the scraper is introduced into the pipe in the directions indicated by the reference 14.
Lorsque le racleur est déplacé dans le sens contraire, chaque disque fléchit et flambe selon les déformations représentées par les sections 15 et 16, pour ensuite prendre la forme finale 17, symétrique à la forme 13. Les silhouettes de butées 18 et 19 démontrent l'utilité et le rôle des jeux j de la figure 1. En particulier, la distance d lors du flambage du disque en retournement montre qu'il faut un jeu suffisant, dépendant de la géométrie du disque et de son renfort, pour que le disque admette un retournement de sens de raclage.When the scraper is moved in the opposite direction, each disc flexes and flames according to the deformations represented by sections 15 and 16, to then take the final shape 17, symmetrical to the shape 13. The silhouettes of stops 18 and 19 demonstrate the utility and the role of the games j of figure 1. In particular, the distance d during the buckling of the disc in reversal shows that it requires a sufficient play, dependent on the geometry of the disc and its reinforcement, so that the disc admits a reversal of the scraping direction.
Il faut noter que l'usure de la tête des pétales en plastique engendre une diminution de la longueur de la lamelle et par conséquent un changement des forces de contact contre la paroi. L'usure de la tête conditionne donc directement la durée de vie du racleur. Ainsi, il peut être intéressant d'optimiser ce paramètre en diminuant le taux d'usure du matériau. Pour cela, on peut améliorer la formulation du plastique de base , par exemple en le chargeant de particules résistantes à l'abrasion, ou en le mélangeant avec un autre polymère, par exemple du PTFE. On peut également, par exemple, charger le plastique de fibres courtes de carbone. Le module du matériau passe alors de E=655 MPa à E=6550 MPa. On constate dans tous les cas que le retournement de la lame n'est pas affecté. It should be noted that the wear of the head of the plastic petals causes a reduction in the length of the strip and consequently a change in the contact forces against the wall. The wear of the head therefore directly conditions the life of the scraper. Thus, it may be advantageous to optimize this parameter by reducing the wear rate of the material. For this, the formulation of the basic plastic can be improved, for example by loading it with abrasion-resistant particles, or by mixing it with another polymer, for example PTFE. It is also possible, for example, to load the plastic with short carbon fibers. The modulus of the material then goes from E = 655 MPa to E = 6550 MPa. It is noted in all cases that the turning of the blade is not affected.
Exemple de matériaux utilisés:Example of materials used:
La présente invention permet ainsi la constitution d'un racleur optimisé du point de vue usure et tenue à des fluides agressifs, mais également au point de vue mise en oeuvre. En effet, pour une même conduite, on peut choisir de superposer le nombre de disques nécessaires en fonction de la situation opérationnelle: fluide visqueux ou non, chargé ou non, séparation étanche, etc. De plus, la remise en état d'un racleur ne pourrait consister qu'en un changement d'un seul disque et non pas de l'ensemble complet d'empilage d'étanchéité et de raclage. The present invention thus allows the constitution of a scraper optimized from the point of view of wear and resistance to aggressive fluids, but also from the point of view of implementation. Indeed, for the same pipe, one can choose to superimpose the number of necessary discs according to the operational situation: viscous fluid or not, charged or not, tight separation, etc. In addition, the repair of a scraper could only consist of a change of a single disc and not of the complete set of sealing and scraping stacking.

Claims

REVENDICATIONS
1) Dispositif de raclage bidirectionnel pour une conduite de distribution de fluide, caractérisé en ce qu'il comporte au moins un disque mince (6) en polymère rigidifié par des moyens de renfort (8), en ce que ledit disque est découpé en pétales par au moins deux fentes radiales de longueur inférieure au rayon dudit disque, ledit rayon étant sensiblement supérieur au diamètre intérieur de ladite conduite.1) Bidirectional scraper device for a fluid distribution pipe, characterized in that it comprises at least one thin disc (6) made of polymer stiffened by reinforcing means (8), in that said disc is cut into petals by at least two radial slots of length less than the radius of said disc, said radius being substantially greater than the inside diameter of said pipe.
2) Dispositif selon la revendication 1, dans lequel un deuxième disque mince est superposé sur le premier de façon telle que les fentes des deux disques soient disposées en quinconce les unes par rapport aux autres.2) Device according to claim 1, wherein a second thin disc is superimposed on the first so that the slots of the two discs are staggered relative to each other.
3) Dispositif selon l'une des revendications précédentes, dans lequel deux ensembles d'étanchéité et de raclage constitués chacun par au moins un disque mince sont liés par un arbre (2, 27) et deux pièces d'extrémité (3, 28) de façon à espacer lesdits deux ensembles d'environ la longueur dudit arbre.3) Device according to one of the preceding claims, wherein two sealing and scraping assemblies each consisting of at least one thin disc are connected by a shaft (2, 27) and two end pieces (3, 28) so as to space said two sets about the length of said shaft.
4) Dispositif selon la revendication 3, dans lequel lesdits ensembles ont une épaisseur inférieure à l'espace compris entre l'arbre et les pièces d'extrémité de façon que lesdits disques minces puissent fléchir dans les deux sens. 5) Dispositif selon l'une des revendications précédentes, dans lequel ledit ensemble de raclage et d'étanchéité comporte, en outre, au moins un disque en polymère non renforcé.4) Device according to claim 3, wherein said assemblies have a thickness less than the space between the shaft and the end pieces so that said thin discs can flex in both directions. 5) Device according to one of the preceding claims, wherein said scraping and sealing assembly further comprises at least one disc of unreinforced polymer.
6) Dispositif selon l'une des revendications précédentes, dans lequel les moyens de renfort sont métalliques.6) Device according to one of the preceding claims, wherein the reinforcing means are metallic.
7) Dispositif selon l'une des revendications 1 à 5, dans lequel les moyens de renforts sont en matériau composite.7) Device according to one of claims 1 to 5, wherein the reinforcing means are made of composite material.
8) Dispositif selon l'une des revendications 6 ou 7, dans lequel les moyens de renforts sont constitués par un disque fendu radialement.8) Device according to one of claims 6 or 7, wherein the reinforcing means are constituted by a radially split disc.
9) Dispositif selon la revendication 8, dans lequel lesdits moyens de renfort sont constitués par un disque fendu de la même façon que ledit disque en polymère de raclage et d'étanchéité.9) Device according to claim 8, wherein said reinforcing means are constituted by a split disc in the same way as said polymer scraping and sealing disc.
10)Dispositif selon l'une des revendications précédentes, dans lequel les moyens de renfort sont noyés dans le disque en polymère.10) Device according to one of the preceding claims, wherein the reinforcing means are embedded in the polymer disc.
ll)Dispositif selon l'une des revendications 1 à 9, dans lequel les moyens de renforts sont plaqués sur le disque en polymère.ll) Device according to one of claims 1 to 9, wherein the reinforcing means are pressed against the polymer disc.
12)Dispositif selon l'une des revendications précédentes, dans lequel ledit polymère est un thermoplastique de type polyamide, polyéthylène, polymère fluoré, par exemple PEUHMW, ETFE, FEP,12) Device according to one of the preceding claims, in which said polymer is a thermoplastic of the polyamide, polyethylene, fluoropolymer type, for example PEUHMW, ETFE, FEP,
PNDF, ECTFE, PFA, PTFE, PEEK, et leur mélange; un thermodurcissable, par exemple l'époxy ou le polyuréthanne; un élastomère.PNDF, ECTFE, PFA, PTFE, PEEK, and their mixture; a thermosetting, for example epoxy or polyurethane; an elastomer.
13)Dispositif selon la revendication 12, dans lequel ledit polymère est chargé de matériau résistant à l'abrasion.13) Device according to claim 12, wherein said polymer is loaded with abrasion resistant material.
14)Application du dispositif selon l'une des revendications précédentes, au raclage et/ou à la séparation entre deux fluides, dans une conduite de distribution de fluides chimiquement agressifs vis-à-vis des élastomères. 14) Application of the device according to one of the preceding claims, for scraping and / or separation between two fluids, in a pipe for distributing fluids chemically aggressive with respect to elastomers.
EP00920850A 1999-05-06 2000-04-19 Optimised scraper for a conduit Expired - Lifetime EP1180066B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9905891A FR2793171B1 (en) 1999-05-06 1999-05-06 OPTIMIZED SCRAPER FOR DRIVING
FR9905891 1999-05-06
PCT/FR2000/001032 WO2000067926A1 (en) 1999-05-06 2000-04-19 Optimised scraper for a conduit

Publications (2)

Publication Number Publication Date
EP1180066A1 true EP1180066A1 (en) 2002-02-20
EP1180066B1 EP1180066B1 (en) 2005-02-16

Family

ID=9545381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00920850A Expired - Lifetime EP1180066B1 (en) 1999-05-06 2000-04-19 Optimised scraper for a conduit

Country Status (13)

Country Link
US (1) US6574821B1 (en)
EP (1) EP1180066B1 (en)
JP (1) JP2002543969A (en)
KR (1) KR20020021372A (en)
AT (1) ATE289224T1 (en)
AU (1) AU4126800A (en)
CA (1) CA2373100C (en)
DE (1) DE60018178T2 (en)
ES (1) ES2248069T3 (en)
FR (1) FR2793171B1 (en)
PT (1) PT1180066E (en)
TW (1) TW530141B (en)
WO (1) WO2000067926A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070193148A1 (en) * 2006-02-03 2007-08-23 Simko Peter J End cap
US8051523B1 (en) * 2006-09-28 2011-11-08 Goodway Technologies Corporation Tube cleaning implement
CA2611271C (en) * 2007-02-01 2014-02-18 Altex Technologies Inc. Scraping element for a pipeline pig
US20100205822A1 (en) * 2009-02-18 2010-08-19 Munden Bruce A Method of drying a tubular string to prevent bedwrap corrosion
US20100205757A1 (en) * 2009-02-18 2010-08-19 Munden Bruce A Bypass pig
JP5968603B2 (en) * 2011-07-29 2016-08-10 有限会社丸甚製作所 Tube inner surface treatment equipment
USD759213S1 (en) * 2013-12-19 2016-06-14 Uresh Ag Pipeline pig
US11235347B2 (en) * 2015-07-10 2022-02-01 Plastocor, Inc. System and method for coating tubes
DE102015122252A1 (en) * 2015-12-18 2017-06-22 Rosen Swiss Ag Pig for inspection and / or cleaning of pipelines
CA2923031A1 (en) 2016-03-08 2017-09-08 Bronislav Walter Guide for a pipeline pig
CN107879401A (en) * 2017-12-18 2018-04-06 南通善水化工科技发展有限公司 A kind of portable chemicals dosing plant
FR3079431A1 (en) * 2018-03-27 2019-10-04 Westair CLEANER OF A PIPING
CN109985869B (en) * 2019-04-28 2021-12-31 东软威特曼生物科技（沈阳）有限公司 Reaction cup cleaning needle, reaction cup cleaning device and reaction cup cleaning method
CA3154272A1 (en) * 2019-10-18 2021-04-22 Hans Ernst SAUER Tapping point clearing apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619844A (en) * 1970-08-03 1971-11-16 Oil States Rubber Co Disc type pipeline scraper and batch separator
US4506401A (en) * 1984-01-16 1985-03-26 Knapp Kenneth M Bristle pig cup
FR2612091B1 (en) * 1987-03-12 1990-02-23 Le Roy Jean BIDIRECTIONAL SCRAPER FOR PIPELINE
JP2687255B2 (en) * 1990-05-18 1997-12-08 グラハム ヒューバート スミス Tube cleaner
US5457841A (en) * 1994-10-13 1995-10-17 Continental Emsco Company Cleaning pig for pipeline of varying diameter
US5698042A (en) * 1996-02-09 1997-12-16 Praxair Technology, Inc. Method of cleaning furnace headers
JP3488891B2 (en) * 1997-11-17 2004-01-19 綜研化学株式会社 Pig for cleaning inside pipes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0067926A1 *

Also Published As

Publication number Publication date
CA2373100A1 (en) 2000-11-16
ATE289224T1 (en) 2005-03-15
FR2793171A1 (en) 2000-11-10
FR2793171B1 (en) 2001-06-15
AU4126800A (en) 2000-11-21
CA2373100C (en) 2009-02-10
TW530141B (en) 2003-05-01
PT1180066E (en) 2005-06-30
JP2002543969A (en) 2002-12-24
WO2000067926A1 (en) 2000-11-16
DE60018178T2 (en) 2005-12-29
KR20020021372A (en) 2002-03-20
US6574821B1 (en) 2003-06-10
DE60018178D1 (en) 2005-03-24
EP1180066B1 (en) 2005-02-16
ES2248069T3 (en) 2006-03-16

Similar Documents

Publication Publication Date Title
EP1180066B1 (en) Optimised scraper for a conduit
EP3014157B1 (en) Flexible pipe and method
EP0867596B1 (en) Threaded joint for tubes
EP1066450B1 (en) Threaded assembly of metal tubes designed to contain a corrosive fluid
FR3074251A1 (en) CONNECTING TIP FOR A FLEXIBLE FLUID TRANSPORT DUCT, DRIVING AND METHOD THEREOF
FR2725259A1 (en) PRESSURE ACTIVATED SEALING RING
EP1934546A1 (en) Device for reducing fouling in a tubular heat exchanger
WO2009147064A1 (en) Flexible pipe with in-built end pieces
EP0780617A1 (en) Screw connection for internally coated metal pipes
FR3008161A1 (en) FLEXIBLE DUCT CONNECTION TIP WITH SPACER, FLEXIBLE DRIVE AND METHOD THEREOF
EP2886804B1 (en) Sealing device for a compressor of a turbomachine
FR2760506A1 (en) PRESSURE ACTIVATED SEALING RING
EP2893227B1 (en) Brush-type circular seal
EP1381798B1 (en) Elastic metal gasket
EP2724047B1 (en) Spring device
EP0711938A1 (en) Static V-shaped metallic seal and sealed assembly
EP0517897B1 (en) Stiffener with reinforced structure
EP2569559B1 (en) Faucet having a metal gasket
EP3966477B1 (en) Compact seal for sealing between a rotating shaft and a stationary body of a machine
EP4204205B1 (en) Manufacturing method for a reinforced thermoplastic pipe comprising a bent portion
WO2018224566A1 (en) Connection fitting for a flexible pipe and associated assembly method
WO2022184993A1 (en) Segmented threaded tubular element
EP4073411A1 (en) Connection end-piece for a flexible pipe, flexible pipe, assembly and associated method
FR2784438A1 (en) High temperature joint for space vehicle has metal substrate with two coating layers, upper having conformable surface for joint sealing
WO2008084141A1 (en) Transmission shaft and corresponding assembly and joint

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): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20011206

17Q First examination report despatched

Effective date: 20031030

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050216

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050216

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050216

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

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

Ref country code: GB

Payment date: 20050322

Year of fee payment: 6

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

REF Corresponds to:

Ref document number: 60018178

Country of ref document: DE

Date of ref document: 20050324

Kind code of ref document: P

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

Ref country code: ES

Payment date: 20050407

Year of fee payment: 6

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

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050419

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050419

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

Ref country code: BE

Payment date: 20050421

Year of fee payment: 6

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

Ref country code: NL

Payment date: 20050425

Year of fee payment: 6

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

Ref country code: PT

Payment date: 20050426

Year of fee payment: 6

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

Ref country code: DE

Payment date: 20050427

Year of fee payment: 6

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050430

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050430

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050516

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050516

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050516

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050608

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20050421

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051230

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20051230

26N No opposition filed

Effective date: 20051117

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2248069

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060419

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060420

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

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060430

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

Ref country code: IT

Payment date: 20060430

Year of fee payment: 7

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061101

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061101

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

Effective date: 20060419

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

Effective date: 20061101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20060420

BERE Be: lapsed

Owner name: FMC EUROPE S.A.

Effective date: 20060430

Owner name: INSTITUT FRANCAIS DU PETROLE

Effective date: 20060430

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20071019

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070419

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050216