EP2503095A1 - Method for on-site repair of a lip of a well head. - Google Patents

Method for on-site repair of a lip of a well head. Download PDF

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Publication number
EP2503095A1
EP2503095A1 EP12159302A EP12159302A EP2503095A1 EP 2503095 A1 EP2503095 A1 EP 2503095A1 EP 12159302 A EP12159302 A EP 12159302A EP 12159302 A EP12159302 A EP 12159302A EP 2503095 A1 EP2503095 A1 EP 2503095A1
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EP
European Patent Office
Prior art keywords
composite material
base flange
flange
layer
elastic seal
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
EP12159302A
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German (de)
French (fr)
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EP2503095B1 (en
Inventor
Denis Devilleger
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Storengy SAS
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Storengy SAS
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Priority to PL12159302T priority Critical patent/PL2503095T3/en
Publication of EP2503095A1 publication Critical patent/EP2503095A1/en
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Publication of EP2503095B1 publication Critical patent/EP2503095B1/en
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    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble

Definitions

  • the present invention relates to a method of in situ repair of a base flange of a wellhead and an arrangement for in situ repair of such a flange.
  • the base flange of a wellhead is the jointing and sealing element between a casing that comes from the bottom of the well and a surface installation from which connecting ducts carry what is produced by the well, for example oil, gas or water, to a distribution network.
  • the base flange which is installed at the construction of the well, can suffer, over time, degradations, including corrosion, resulting in leaks.
  • the well When it comes to reconditioning the base flange, the well must be shut down, purged and disassembled at the wellhead to restore the base flange and adjacent components, including the tube. on which the wellhead is mounted, or, where appropriate, install new parts.
  • the object of the invention is to propose a solution to this problem.
  • the object of the invention is also achieved with an arrangement for in situ repair of a base flange of a wellhead, which comprises at least one layer of a polymerized composite material applied on the damaged surfaces and previously stripped respectively of the base flange and an adjacent piece such as the tube on which the wellhead is mounted, an elastic seal intended to be placed on the composite material previously applied when the latter is polymerized, at the junction between the base flange and the adjacent piece, and a reinforcing collar shaped to press the seal on the damaged surface.
  • This arrangement may also comprise, when the base flange is placed on a casing having a double wall below the flange, the space between the two walls being filled for example with cement, an annular foam ring on the cement filling and an epoxy resin crown cast on the coil so that it has an upper surface sloping outwardly of the casing.
  • the repair of the base flange of a well is carried out in situ, that is to say without dismounting the wellhead.
  • the well remains operational.
  • the damage to be repaired is generally below the base flange, more particularly at the connection between the base flange and the casing on which the wellhead is engaged, the repair consists of removing corrosion, protecting the cleaned surfaces with a suitable coating and applying a polymer resin or other suitable polymerizable composite material to protect the flange from access to vapors or corrosive liquids.
  • FIG. 1 The design of a well to which the repair method according to the invention applies is visible on the figure 1 .
  • a well head 1 is fixed on a production duct or casing 2 coming from the bottom of the well by a base flange 3.
  • the flange 3 comprises a lower surface 31 on which, by tightening, the heads 33 of screws 32 are supported by which flange 3 is attached to the wellhead 1.
  • the lower surface 31 may be at right angles, as in the accompanying drawings, but also at an obtuse angle of up to about 160 °.
  • a gas well may be provided with a triple casing 2 comprising a gas production tube 21, an intermediate tube 22 on which is screwed the base flange 3 and an outer tube 23.
  • This triple casing 2 constitutes two annular tubes. safety 24, 25 to prevent gas escaping and environmental pollution.
  • the first ring 24 is located between the production tube 21 and the intermediate tube 22. This ring is filled with water and must not be under pressure. If on the contrary this annular is under pressure, it indicates a leak to one of the elements at the bottom of the well.
  • the second annular 25 is located between the intermediate tube 22 and the outer tube 23 and is filled with cement.
  • the gas rises to the surface through the first ring 24 and arrives at the level of the base flange 3.
  • the connecting thread between the intermediate tube 22 and the base flange 3 not necessarily waterproof, the leak is reported on the surface in the cellar. More particularly, corrosion occurs on the lower surface 31 of the flange 3 but also on the outer wall of the intermediate tube 22, close to the junction between the flange 3 and the tube 22.
  • the invention proposes to make this leak tight by application of one or more polymer layers 4 flanking an O-ring 5, the whole being compressed by a metal reinforcing collar 6 forced by studs 7 which replace the screws 32 by which the base flange 3 is initially secured to the wellhead 1.
  • the corroded surfaces of the flange 3 and the tube 22 are etched and thoroughly cleaned, especially degreased, in order to then apply a composite polymeric repair material, in particular elastomer, two components.
  • the pickling is advantageously carried out by sandblasting or shot blasting with sufficiently fine particles to obtain a roughness of the order of 75 micrometers of the surface of the tube 22 and the surface 31 of the flange 3.
  • the etched surfaces are treated with an anticorrosive coating to prevent further corrosion until the application of a protective composite material.
  • the composite repair material which is advantageously a two-component elastomeric polymeric material, is applied to the surfaces to be treated in one or more layers 4 in accordance with the indications of the manufacturer of the material, particularly with regard to the duration and the polymerization temperature determined by the manufacturer.
  • the first of the three mandatory steps of the method of the invention is characteristic of the method of the invention, the pickling steps and anticorrosive coating can be modified according to the precise nature and scope of the particular damage to be repaired.
  • the location provided for the O-ring 5 is prepared by filling an area 9 located between the thread of the tube 22 and the location of the O-ring with several layers of polymeric repair composite materials. according to the specifications of the manufacturer of the composite material.
  • the O-ring 5 which is made for example of nitrile, is placed in the angle formed by the bottom surface 31 of the base flange 3 and the outside face of the tube 22.
  • the reinforcing collar 6 itself protected against corrosion by a coating, is disposed below the base flange 3
  • a sealing device is made with an annular ring 11 of polyurethane foam and an epoxy resin casting ring 12 so that, when the resin is hardened, it has an upper surface 13 sloping outwardly of the tube 23 to prevent water stagnation and corrosion.
  • a small tube 14 is mounted in the flange 11 so as to capture the gas to monitor whether there is a rise in pressure or to analyze the gas or to determine the leakage rate.
  • On the free end of the small tube 14 are mounted a valve and a pressure gauge.

Abstract

The method involves applying a polymerizable composite layer (4) to a damaged inner surface (31) of a base flange (3) and an adjacent piece i.e. triple tubing. An elastic seal i.e. O-ring joint (5), is placed on the polymerizable composite layer at a junction between the base flange and the adjacent piece after polymerizing polymerizable composite material i.e. elastomer. A metallic reinforcing collar (6) is positioned to press the elastic seal against a surface of the base flange covered with the polymerizable composite material. An independent claim is also included for an arrangement for in-situ repairing of a base flange of a wellhead.

Description

La présente invention concerne un procédé de réparation in situ d'une bride de base d'une tête de puits ainsi qu'un agencement pour une réparation in situ d'une telle bride.The present invention relates to a method of in situ repair of a base flange of a wellhead and an arrangement for in situ repair of such a flange.

La bride de base d'une tête de puits est l'élément qui permet de faire la jonction et assurer l'étanchéité entre un tubage qui vient du fond du puits et une installation de surface à partir de laquelle des conduits de raccordement transportent ce qui est produit par le puits, par exemple du pétrole, du gaz ou de l'eau, vers un réseau de distribution.The base flange of a wellhead is the jointing and sealing element between a casing that comes from the bottom of the well and a surface installation from which connecting ducts carry what is produced by the well, for example oil, gas or water, to a distribution network.

La bride de base, qui est installée à la construction du puits, peut subir, au cours du temps, des dégradations, notamment par de la corrosion, résultant en des fuites. Lorsqu'il s'agit de remettre en état la bride de base, il faut mettre le puits à l'arrêt, le purger et démonter la tête de puits pour pouvoir remettre en état la bride de base et des éléments adjacents, notamment le tube sur lequel la tête de puits est montée, ou, le cas échéant, installer de nouvelles pièces.The base flange, which is installed at the construction of the well, can suffer, over time, degradations, including corrosion, resulting in leaks. When it comes to reconditioning the base flange, the well must be shut down, purged and disassembled at the wellhead to restore the base flange and adjacent components, including the tube. on which the wellhead is mounted, or, where appropriate, install new parts.

L'arrêt d'un puits étant coûteux, celui-ci n'est envisageable que dans des cas d'exception. Ainsi, la réparation d'une bride de base d'une tête de puits est considérée comme étant impossible.Since the shutdown of a well is expensive, it can only be considered in exceptional cases. Thus, the repair of a base flange of a wellhead is considered impossible.

Le but de l'invention est de proposer une solution à ce problème.The object of the invention is to propose a solution to this problem.

Le but de l'invention est atteint avec un procédé de réparation in situ d'une bride de base d'une tête de puits, qui comprend au moins les étapes suivantes :

  • appliquer au moins une couche d'un matériau composite polymérisable sur les surfaces endommagées et puis décapées de la bride de base et d'une pièce adjacente avec laquelle la bride de base est en contact, généralement le tube sur lequel la tête de puits est montée,
  • placer un joint élastique sur la couche de matériau composite, lorsque ce dernier est polymérisé, à la jonction entre la bride de base et la pièce adjacente,
  • mettre en place un collier de renforcement adapté pour presser le joint sur la surface recouverte du matériau composite de la bride.
The object of the invention is achieved with an in situ repair method of a base flange of a wellhead, which comprises at least the following steps:
  • applying at least one layer of a polymerizable composite material to the damaged and then stripped surfaces of the base flange and an adjacent piece with which the base flange is in contact, typically the tube on which the wellhead is mounted ,
  • placing an elastic seal on the layer of composite material, when the latter is polymerized, at the junction between the base flange and the adjacent piece,
  • put in place a reinforcing collar adapted to press the seal on the surface covered with the composite material of the flange.

Selon différentes possibilités de mise en oeuvre, le procédé de l'invention peut comporter en plus l'une au moins des étapes suivantes :

  • avant l'application d'une couche d'un matériau composite polymérisable sur la surface endommagée de la bride de base et de la pièce adjacente :
    • = décaper la surface endommagée,
    • = appliquer une couche d'un produit anticorrosion sur la surface décapée ;
  • après l'application d'une couche d'un matériau composite polymérisable sur la surface endommagée et avant la mise en place du joint élastique :
    • appliquer plusieurs couches du matériau composite pour préparer un lit pour le joint élastique ;
  • après la mise en place du joint élastique et avant la mise en place du collier de renforcement :
    • appliquer au moins une couche du matériau composite de part et d'autre du joint ;
  • lorsque la bride de base est placée sur un tubage comportant en dessous de la bride une paroi double, l'espace entre les deux parois étant rempli par exemple de ciment :
    • placer un boudin annulaire en mousse sur le remplissage de l'espace entre les deux tubes et
    • couler une couronne en résine époxy sur le boudin de façon qu'elle présente une surface supérieure en pente vers l'extérieur du tubage afin d'éviter la stagnation d'eau et la corrosion.
According to different possibilities of implementation, the method of the invention may comprise in addition at least one of the following steps:
  • before applying a layer of a polymerizable composite material to the damaged surface of the base flange and the adjacent piece:
    • = strip the damaged surface,
    • = apply a layer of an anticorrosion product on the etched surface;
  • after the application of a layer of a polymerizable composite material on the damaged surface and before the introduction of the elastic seal:
    • applying several layers of the composite material to prepare a bed for the elastic seal;
  • after the installation of the elastic seal and before the installation of the reinforcement collar:
    • applying at least one layer of the composite material on either side of the joint;
  • when the base flange is placed on a casing having a double wall below the flange, the space between the two walls being filled for example with cement:
    • place an annular foam bead on the filling of the space between the two tubes and
    • casting an epoxy resin crown on the coil so that it has an upper surface sloping outwardly of the casing to prevent water stagnation and corrosion.

Le but de l'invention est également atteint avec un agencement pour une réparation in situ d'une bride de base d'une tête de puits, qui comprend au moins une couche d'un matériau composite polymérisé appliquée sur les surfaces endommagées et préalablement décapée respectivement de la bride de base et d'une pièce adjacente telle le tube sur lequel la tête de puits est montée, un joint élastique destiné à être placé sur le matériau composite préalablement appliqué lorsque ce dernier est polymérisé, à la jonction entre la bride de base et la pièce adjacente, et un collier de renforcement conformé pour presser le joint sur la surface endommagée.The object of the invention is also achieved with an arrangement for in situ repair of a base flange of a wellhead, which comprises at least one layer of a polymerized composite material applied on the damaged surfaces and previously stripped respectively of the base flange and an adjacent piece such as the tube on which the wellhead is mounted, an elastic seal intended to be placed on the composite material previously applied when the latter is polymerized, at the junction between the base flange and the adjacent piece, and a reinforcing collar shaped to press the seal on the damaged surface.

Cet agencement peut comprendre également, lorsque la bride de base est placée sur un tubage comportant en dessous de la bride une paroi double, l'espace entre les deux parois étant rempli par exemple de ciment,
un boudin annulaire en mousse sur le remplissage en ciment et
une couronne en résine époxy coulée sur le boudin de façon qu'elle présente une surface supérieure en pente vers l'extérieur du tubage.This arrangement may also comprise, when the base flange is placed on a casing having a double wall below the flange, the space between the two walls being filled for example with cement,
an annular foam ring on the cement filling and
an epoxy resin crown cast on the coil so that it has an upper surface sloping outwardly of the casing.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description ci-après d'un mode de mise en oeuvre du procédé de l'invention.Other features and advantages of the present invention will emerge from the following description of an embodiment of the method of the invention.

La description est faite en référence aux dessins annexés dont

  • la figure 1 est une vue schématique en perspective de la partie basse d'une tête de puits,
  • la figure 2 est une vue en coupe de la jonction entre une tête de puits et le tubage du puits, et
  • la figure 3 est une vue en coupe de la position de la bride de base par rapport au fond de cave du raccordement.
The description is made with reference to the accompanying drawings of which
  • the figure 1 is a schematic perspective view of the lower part of a wellhead,
  • the figure 2 is a sectional view of the junction between a wellhead and well casing, and
  • the figure 3 is a sectional view of the position of the base flange relative to the cellar floor of the connection.

Selon le procédé de réparation objet de la présente invention, la réparation de la bride de base d'un puits est effectuée in situ, c'est-à-dire sans démonter la tête de puits. Le puits reste donc opérationnel.According to the method of repair object of the present invention, the repair of the base flange of a well is carried out in situ, that is to say without dismounting the wellhead. The well remains operational.

Le dommage à réparer se situant généralement en dessous de la bride de base, plus particulièrement à la jonction entre la bride de base et le tubage sur lequel la tête de puits est engagée, la réparation consiste à enlever les traces de corrosion, à protéger les surfaces nettoyées par un enduit approprié et à appliquer une résine polymère ou tout autre matériau composite polymérisable approprié pour protéger la bride de l'accès de vapeurs ou de liquides corrosifs.The damage to be repaired is generally below the base flange, more particularly at the connection between the base flange and the casing on which the wellhead is engaged, the repair consists of removing corrosion, protecting the cleaned surfaces with a suitable coating and applying a polymer resin or other suitable polymerizable composite material to protect the flange from access to vapors or corrosive liquids.

La conception d'un puits auquel le procédé de réparation selon l'invention s'applique est visible sur la figure 1. Une tête de puits 1 est fixée sur un conduit ou tubage de production 2 venant du fond du puits par une bride de base 3. La bride 3 comporte une surface inférieure 31 sur laquelle prennent appui, au serrage, des têtes 33 de vis 32 par lesquelles la bride 3 est fixée à la tête de puits 1. La surface inférieure 31 peut être à angle droit, comme sur les dessins annexés, mais aussi à angle obtus allant jusqu'à environ 160°.The design of a well to which the repair method according to the invention applies is visible on the figure 1 . A well head 1 is fixed on a production duct or casing 2 coming from the bottom of the well by a base flange 3. The flange 3 comprises a lower surface 31 on which, by tightening, the heads 33 of screws 32 are supported by which flange 3 is attached to the wellhead 1. The lower surface 31 may be at right angles, as in the accompanying drawings, but also at an obtuse angle of up to about 160 °.

Comme cela est visible sur la figure 3, un puits de gaz peut être pourvu d'un triple tubage 2 comportant un tube de production de gaz 21, un tube intermédiaire 22 sur lequel est vissée la bride de base 3 et un tube extérieur 23. Ce triple tubage 2 constitue deux annulaires de sécurité 24, 25 pour éviter l'échappement de gaz et la pollution de l'environnement.As is visible on the figure 3 , a gas well may be provided with a triple casing 2 comprising a gas production tube 21, an intermediate tube 22 on which is screwed the base flange 3 and an outer tube 23. This triple casing 2 constitutes two annular tubes. safety 24, 25 to prevent gas escaping and environmental pollution.

Le premier annulaire 24 est situé entre le tube de production 21 et le tube intermédiaire 22. Cet annulaire est rempli d'eau et ne doit pas être en pression. Si au contraire cet annulaire est sous pression, cela indique une fuite à un des éléments en bas du puits.The first ring 24 is located between the production tube 21 and the intermediate tube 22. This ring is filled with water and must not be under pressure. If on the contrary this annular is under pressure, it indicates a leak to one of the elements at the bottom of the well.

Le second annulaire 25 est situé entre le tube intermédiaire 22 et le tube extérieur 23 et est rempli de ciment.The second annular 25 is located between the intermediate tube 22 and the outer tube 23 and is filled with cement.

Si au cours du temps une fuite se déclare au fond du puits, le gaz remonte en surface au travers du premier annulaire 24 et arrive au niveau de la bride de base 3. Le filetage de jonction entre le tube intermédiaire 22 et la bride de base 3 n'étant pas forcément étanche, la fuite se déclare en surface dans la cave. Plus particulièrement, de la corrosion se produit sur la surface inférieure 31 de la bride 3 mais aussi sur la paroi extérieure du tube intermédiaire 22, proche de la jonction entre la bride 3 et le tube 22. L'invention propose de rendre cette fuite étanche par application d'une ou de plusieurs couches 4 en polymères encadrant un joint torique 5, le tout étant comprimé par un collier métallique de renforcement 6 forcé par des goujons 7 qui remplacent les vis 32 par lesquelles la bride de base 3 est initialement solidarisée avec la tête de puits 1.If, in the course of time, there is a leak at the bottom of the well, the gas rises to the surface through the first ring 24 and arrives at the level of the base flange 3. The connecting thread between the intermediate tube 22 and the base flange 3 not necessarily waterproof, the leak is reported on the surface in the cellar. More particularly, corrosion occurs on the lower surface 31 of the flange 3 but also on the outer wall of the intermediate tube 22, close to the junction between the flange 3 and the tube 22. The invention proposes to make this leak tight by application of one or more polymer layers 4 flanking an O-ring 5, the whole being compressed by a metal reinforcing collar 6 forced by studs 7 which replace the screws 32 by which the base flange 3 is initially secured to the wellhead 1.

Tout au début de la réparation, les surfaces corrodées de la bride 3 et du tube 22 sont décapées et consciencieusement nettoyées, notamment dégraissées, afin de pouvoir appliquer ensuite un matériau composite de réparation polymérique, notamment élastomère, à deux composants. Le décapage est avantageusement effectué par sablage ou grenaillage avec des particules suffisamment fines pour obtenir une rugosité de l'ordre de 75 micromètres de la surface du tube 22 et de la surface 31 de la bride 3.At the beginning of the repair, the corroded surfaces of the flange 3 and the tube 22 are etched and thoroughly cleaned, especially degreased, in order to then apply a composite polymeric repair material, in particular elastomer, two components. The pickling is advantageously carried out by sandblasting or shot blasting with sufficiently fine particles to obtain a roughness of the order of 75 micrometers of the surface of the tube 22 and the surface 31 of the flange 3.

Ensuite, les surfaces décapées sont traitées avec un enduit anticorrosion pour éviter toute nouvelle corrosion jusqu'à l'application d'un matériau composite de protection.Then, the etched surfaces are treated with an anticorrosive coating to prevent further corrosion until the application of a protective composite material.

Par la suite, le matériau composite de réparation, qui est avantageusement un matériau polymérique élastomère à deux composants, est appliqué sur les surfaces à traiter en une ou plusieurs couches 4 conformément aux indications du fabriquant du matériau, notamment en ce qui concerne la durée et la température de polymérisation déterminés par le fabriquant. La première des trois étapes obligatoires du procédé de l'invention est caractéristique du procédé de l'invention, les étapes de décapage et d'enduit anticorrosion pouvant être modifiées selon la nature précise et l'envergure du dommage particulier à réparer.Subsequently, the composite repair material, which is advantageously a two-component elastomeric polymeric material, is applied to the surfaces to be treated in one or more layers 4 in accordance with the indications of the manufacturer of the material, particularly with regard to the duration and the polymerization temperature determined by the manufacturer. The first of the three mandatory steps of the method of the invention is characteristic of the method of the invention, the pickling steps and anticorrosive coating can be modified according to the precise nature and scope of the particular damage to be repaired.

Dans l'étape suivante, l'emplacement prévu pour le joint torique 5 est préparé par le remplissage d'une zone 9 située entre le pas de vis du tube 22 et l'emplacement du joint torique avec plusieurs couches de matériaux composites de réparation polymérique, selon les prescriptions du fabriquant du matériau composite.In the next step, the location provided for the O-ring 5 is prepared by filling an area 9 located between the thread of the tube 22 and the location of the O-ring with several layers of polymeric repair composite materials. according to the specifications of the manufacturer of the composite material.

Ensuite, le joint torique 5, qui est réalisé par exemple en nitrile, est placé dans l'angle formé par la surface inférieure 31 de la bride de base 3 et la face extérieure du tube 22.Then, the O-ring 5, which is made for example of nitrile, is placed in the angle formed by the bottom surface 31 of the base flange 3 and the outside face of the tube 22.

Lorsque le joint torique 5 est en place, l'espace se présentant de part et d'autre du joint torique est rempli avec au moins une, généralement de plusieurs couches 10 de matériaux composites de réparation polymérique élastomère. Enfin, pour maintenir le joint torique 5 en place et pour le presser contre les couches 4 de matériaux composites, le collier de renforcement 6, protégé lui-même contre la corrosion par un enduit, est disposé en-dessous de la bride de base 3. Le collier de renforcement 6, qui est conçu en deux demi-coquilles pour pouvoir le mettre en place autour de la bride 3, est maintenu sur les goujons 7 moyennant des écrous 8 dont un premier écrou sécurise le goujon 7 correspondant dans la bride de base 3 et dont deux autres écrous, utilisés comme écrou/contre-écrou, sécurisent le collier 6 sur le goujon 7 correspondant comme cela est visible sur les figures 2 et 3.When the O-ring 5 is in place, the space on either side of the O-ring is filled with at least one, generally multiple layers of elastomeric polymeric repair composite materials. Finally, to maintain the O-ring 5 in place and to press against the layers 4 of composite materials, the reinforcing collar 6, itself protected against corrosion by a coating, is disposed below the base flange 3 The reinforcing collar 6, which is designed in two half-shells to be able to place it around the flange 3, is held on the studs 7 by means of nuts 8, the first nut of which secures the corresponding stud 7 in the flange of FIG. base 3 and two other nuts, used as a nut / lock nut, secure the collar 6 on the stud 7 corresponding as visible on the figures 2 and 3 .

Par la suite, comme cela est représenté sur la figure 3, si au cours du temps on a constaté une fuite dans le second annulaire 25, un dispositif d'étanchement est réalisé avec un boudin annulaire 11 en mousse polyuréthane et une couronne 12 coulée en résine époxy de façon que, lorsque la résine est durcie, elle présente une surface supérieure 13 en pente vers l'extérieur du tube 23 afin d'éviter la stagnation d'eau et la corrosion. Un petit tube 14 est monté dans le boudin 11 de façon à capter le gaz pour surveiller s'il y a une montée en pression ou pour analyser le gaz ou encore pour déterminer le débit de fuite. Sur l'extrémité libre du petit tube 14 sont montés une vanne et un manomètre.Subsequently, as shown on the figure 3 if, in the course of time, there has been a leak in the second ring 25, a sealing device is made with an annular ring 11 of polyurethane foam and an epoxy resin casting ring 12 so that, when the resin is hardened, it has an upper surface 13 sloping outwardly of the tube 23 to prevent water stagnation and corrosion. A small tube 14 is mounted in the flange 11 so as to capture the gas to monitor whether there is a rise in pressure or to analyze the gas or to determine the leakage rate. On the free end of the small tube 14 are mounted a valve and a pressure gauge.

Claims (9)

Procédé de réparation in situ d'une bride de base d'une tête de puits,
caractérisé en ce qu'il comprend au moins les étapes suivantes : appliquer au moins une couche (4) d'un matériau composite polymérisable sur les surfaces (31) endommagées et puis décapées de la bride de base (3) et d'une pièce adjacente (2), placer un joint élastique (5) sur la couche (4) de matériau composite lorsque ce dernier est polymérisé, à la jonction entre la bride de base (3) et la pièce adjacente (2), mettre en place un collier (6) de renforcement adapté pour presser le joint (5) sur la surface recouverte du matériau composite (4) de la bride (3). In situ repair method of a base flange of a wellhead,
characterized in that it comprises at least the following steps: applying at least one layer (4) of a polymerizable composite material to the damaged (31) surfaces and then stripped from the base flange (3) and an adjacent piece (2), placing an elastic seal (5) on the layer (4) of composite material when the latter is polymerized, at the junction between the base flange (3) and the adjacent piece (2), put in place a collar (6) of reinforcement adapted to press the seal (5) on the surface covered with the composite material (4) of the flange (3). Procédé selon la revendication 1, caractérisé en ce qu'il comprend en plus les étapes suivantes : avant l'application d'une couche (4) d'un matériau composite polymérisable sur la surface endommagée de la bride de base (3), décaper la surface endommagée, appliquer une couche d'un produit anticorrosion sur la surface décapée. Method according to claim 1, characterized in that it further comprises the following steps: before applying a layer (4) of a polymerizable composite material to the damaged surface of the base flange (3), strip the damaged surface, apply a coat of an anti-corrosion product to the etched surface. Procédé selon la revendication 2, caractérisé en ce qu'il comprend en plus l'étape suivante : après l'application d'une couche (4) d'un matériau composite polymérisable sur la surface endommagée et avant la mise en place du joint élastique (5), appliquer plusieurs couches du matériau composite pour préparer un lit pour le joint élastique (5). Method according to claim 2, characterized in that it further comprises the following step: after applying a layer (4) of a polymerizable composite material to the damaged surface and prior to the introduction of the elastic seal (5), applying a plurality of layers of the composite material to prepare a bed for the elastic seal (5). ). Procédé selon la revendication 3, caractérisé en ce qu'il comprend en plus l'étape suivante : après la mise en place du joint élastique (5) et avant la mise en place du collier de renforcement (6), appliquer au moins une couche du matériau composite de part et d'autre du joint (5). Method according to claim 3, characterized in that it further comprises the following step: after insertion of the elastic seal (5) and before the insertion of the reinforcing collar (6), apply at least one layer of the composite material on either side of the seal (5). Procédé selon l'une quelconque des revendications 1 à 4, lorsque la bride de base (3) est placée sur un tubage triple (2) comportant en dessous de la bride (3) un tube intermédiaire (22) et un tube extérieur (23), l'espace (25) entre les deux tubes (22, 23) étant rempli,
caractérisé en ce qu'il comprend en outre les étapes de : placer un boudin annulaire (11) en mousse sur le haut du remplissage de l'espace (25) entre les deux tubes (22, 23) et couler une couronne (12) en résine époxy sur le boudin de façon qu'elle présente une surface supérieure (13) en pente vers l'extérieur du tubage (2) afin d'éviter la stagnation d'eau et la corrosion. Method according to any one of claims 1 to 4, when the base flange (3) is placed on a triple casing (2) having below the flange (3) an intermediate tube (22) and an outer tube (23). ), the space (25) between the two tubes (22, 23) being filled,
characterized in that it further comprises the steps of: placing a foam ring (11) on the top of the space filling (25) between the two tubes (22, 23) and casting an epoxy resin ring (12) on the coil so that it has an upper surface (13) sloping outwardly of the casing (2) to prevent water stagnation and corrosion. Agencement pour une réparation in situ d'une bride de base d'une tête de puits,
caractérisé en ce qu'il comprend au moins une couche (4) d'un matériau composite polymérisé appliquée sur une surface (31) endommagée et préalablement décapée de la bride de base (3), un joint élastique (5) destiné à être placé sur le matériau composite préalablement appliqué et un collier de renforcement (3) conformé pour presser le joint (5) sur la surface (31) endommagée.Arrangement for in situ repair of a base flange of a wellhead,
characterized in that it comprises at least one layer (4) of a polymerised composite material applied to a damaged and previously stripped surface (31) of the base flange (3), an elastic seal (5) to be placed on the previously applied composite material and a reinforcing collar (3) shaped to press the seal (5) on the damaged surface (31). Agencement selon la revendication 6, lorsque la bride de base (3) est placée sur un tubage triple (2) comportant en dessous de la bride (3) un tube intermédiaire (22) et un tube extérieur (23)), l'espace (25) entre les deux tubes (22, 23) étant rempli, caractérisé en ce qu'il comprend une couronne (12) en résine époxy avec une surface supérieure (13) en pente vers l'extérieur du tubage (2), coulée sur le haut de l'espace (23) entre les deux parois (21, 22).Arrangement according to claim 6, when the base flange (3) is placed on a triple casing (2) having below the flange (3) an intermediate tube (22) and an outer tube (23)), the space (25) between the two tubes (22, 23) being filled, characterized in that it comprises a crown (12) made of epoxy resin with an upper surface (13) sloping towards the outside of the casing (2), casting on the top of the space (23) between the two walls (21, 22). Puits, caractérisé en ce qu'il a été réparé suivant le procédé selon l'une quelconque des revendications 1 à 5.Well, characterized in that it has been repaired according to the method according to any of claims 1 to 5. Puits, caractérisé en ce qu'il comprend un agencement selon la revendication 6 ou 7.Well, characterized in that it comprises an arrangement according to claim 6 or 7.
EP12159302.4A 2011-03-25 2012-03-13 Method for on-site repair of a lip of a well head. Active EP2503095B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12159302T PL2503095T3 (en) 2011-03-25 2012-03-13 Method for on-site repair of a lip of a well head.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1152482A FR2973063B1 (en) 2011-03-25 2011-03-25 METHOD FOR IN SITU REPAIR OF A BASE FLANGE OF A WELL HEAD

Publications (2)

Publication Number Publication Date
EP2503095A1 true EP2503095A1 (en) 2012-09-26
EP2503095B1 EP2503095B1 (en) 2015-06-10

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ID=45808341

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EP12159302.4A Active EP2503095B1 (en) 2011-03-25 2012-03-13 Method for on-site repair of a lip of a well head.

Country Status (7)

Country Link
US (1) US9169708B2 (en)
EP (1) EP2503095B1 (en)
CN (1) CN102691489B (en)
DK (1) DK2503095T3 (en)
FR (1) FR2973063B1 (en)
PL (1) PL2503095T3 (en)
RU (1) RU2564307C2 (en)

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CN104439886B (en) * 2014-10-21 2016-08-17 山东钢铁股份有限公司 A kind of vacuum drying oven diffusion pump cast iron housing crackle strengthening with external bonding device and crackle Bonded Repair method

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Also Published As

Publication number Publication date
FR2973063B1 (en) 2015-01-16
FR2973063A1 (en) 2012-09-28
CN102691489A (en) 2012-09-26
US9169708B2 (en) 2015-10-27
US20120240373A1 (en) 2012-09-27
RU2564307C2 (en) 2015-09-27
RU2012111563A (en) 2013-09-20
DK2503095T3 (en) 2015-09-14
CN102691489B (en) 2017-04-12
EP2503095B1 (en) 2015-06-10
PL2503095T3 (en) 2016-01-29

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