EP2440743B1 - Tube filtre pour puits et son procédé de fabrication - Google Patents

Tube filtre pour puits et son procédé de fabrication Download PDF

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Publication number
EP2440743B1
EP2440743B1 EP10763418.0A EP10763418A EP2440743B1 EP 2440743 B1 EP2440743 B1 EP 2440743B1 EP 10763418 A EP10763418 A EP 10763418A EP 2440743 B1 EP2440743 B1 EP 2440743B1
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EP
European Patent Office
Prior art keywords
slats
tubular body
section
fluid
screen
Prior art date
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Not-in-force
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EP10763418.0A
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German (de)
English (en)
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EP2440743A1 (fr
Inventor
Nicola Cempini
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.)
Ingegnerie Toscane Srl
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INGEGNERIE TOSCANE Srl
INGEGNERIE TOSCANE Srl
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Publication of EP2440743A1 publication Critical patent/EP2440743A1/fr
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/088—Wire screens

Definitions

  • the present invention relates to hydrogeology and to the exploitation of underground fluids, in particular, it relates to a screen structure for a well, for instance an artesian well, a geothermal well and the like.
  • the invention relates to a method for making such a screen structure.
  • a well comprises a tubular duct, or casing, which is arranged in a wellbore that has been drilled in the ground to find a aquifer or a gas or oil reservoir or a geothermal reservoir.
  • the well casing provides an extraction screen that is adapted to allow water to flow upwards through the well casing.
  • a drainage material is arranged about the extraction screen in order to filter away from the fluid the solid particles that are present in the aquifer or in the reservoir.
  • the extraction screen is used to retain the drainage material, and to cause the fluid to leak within the well casing.
  • Extraction screens are known that have a different structure, the most widespread of which are the shutter screen, the bridge slot screen and the wire wrap screen.
  • the fluid motion in a aquifer can be assimilated to a plurality of fluid threads, which have each an indefinitely small cross section, and move along any line and according to any direction, such lines and directions defining the flow lines of the threads.
  • the flow lines are substantially horizontal and have only very small vertical quickly changing components, therefore the fluid can be effectively filtered in a conventional screen, for example in a wire wrap screen.
  • a horizontal speed-vector undergoes a sudden acceleration which increases its intensity from some cm/s, which is generally the aquifer speed, up to some m/s, which is the speed at the entrance of the well casing.
  • the direction of the speed-vector changes from a horizontal direction into a vertical one.
  • a vertical component of the fluid speed arises, which becomes greater than the horizontal speed once the fluid is close to the screen.
  • the horizontal slits of the wire wrap screen oppose a resistance against the vertical component, causing a local pressure drop.
  • a horizontal arrangement of the slits causes a local pressure drop when the fluid enters the screen. Furthermore, the screen slits are more likely to clog.
  • a further filter type is disclosed in US3211234A , which provides a plurality of triangular cross section slats that are spaced with respect to each other to form a tubular body and a plurality of longitudinal openings along it.
  • the slats are bound to one another by one or more reciprocally spaced weld lines.
  • this structure is not well-suited for to medium-depth and deep installations, since the screen would undergo radial forces that would damage the same.
  • a further drawback is that the slat cross section angle causes a high turbulence of the threads that cross the filter and, therefore, gives rise to high fluid pressure drops through the screen. Moreover, such turbulence can develop gas (e.g. a CO 2 gas loss) from the fluid, which in turn can give rise to a precipitation of salts that may be present as a solute in the fluid, and therefore can cause the formation of salt scale (e.g. calcium carbonate scale).
  • gas e.g. a CO 2 gas loss
  • reinjection may be necessary when the fluid extracted from a geothermal reservoir cannot be used as such, since it carries a very high mineral content and is not well suited for a direct home or industrial use, such as in the case of low enthalpy fluid sources whose temperature ranges from 20°C to 70°C.
  • the extracted fluid passes through a heat exchanger, in which a conduction/convection heat exchange takes place with a working fluid, which is then used by a heating device.
  • the underground fluid reinjection makes it possible to extend the life of the well and makes it unnecessary to treat the extracted fluid, as required by environmental emission limitations.
  • a reinjection well comprises a well casing that is provided with a filtration portion, i.e. a screen adapted to reintroduce into a aquifer, or into a reservoir, the fluid that has been reinjected through the well casing.
  • a filtration portion i.e. a screen adapted to reintroduce into a aquifer, or into a reservoir, the fluid that has been reinjected through the well casing.
  • a reinjection well which is installed close to an extraction well, has the same construction of the extraction well, such that a circuit is obtained, which is adapted for energy exchange.
  • a screen structure for a well casing comprising:
  • the slats define a plurality of solid portions that are spaced from each other by respective void portions, i.e. by longitudinal slits, such that, in use, the slits are arranged in a substantially vertical direction, i.e. they are arranged parallel to the longitudinal axis of the tubular body.
  • said slats are blades of a predetermined size, said blades tapered along a direction that extends from outside to inside of said tubular body, forming an extraction screen.
  • the slits that are located between two respective slats have a divergent cross section, which has a minimum width at the outer side surface of the tubular body. Therefore, if a draining granular material is arranged outside of the tubular body, the diameter of the granular material larger than the slits minimum width, the tubular body peripherally retains the draining granular material while allowing the fluid to flow through the slits.
  • the diverging and vertical cross section of the slits makes it possible to keep the pressure drops of the fluid below a minimum value.
  • the vertically extending slits do not offer any resistance to the vertical speed component, which is substantially unaffected by the passage of the fluid through the screen or through the tubular body.
  • the flow lines of the fluid, near the screen enter the tubular body without any substantial pressure drop and without any substantial reduction of the vertical component of the speed-vector.
  • said slats are blades of a predetermined size, said blades tapered along a direction that extends from the inside to the outside of said tubular body, to provide a reinjection screen.
  • the screen is used as a filter for a fluid reinjection well.
  • the flow lines of the fluid, near the screen exit from the tubular body without any substantial pressure drop and without meeting any jammed passages between the slats.
  • the angle that is formed between said sides at said vertex which is set between 8.5° and 17°, remarkably reduces fluid turbulence, and therefore reduces the fluid pressure drop across the screen.
  • the high turbulence reduction that is achieved by the invention does not cause any loss of gas that might be dissolved in the fluid (e.g. a CO 2 gas), therefore it doesn't give rise to any precipitation of salts that may be present as a solute in the fluid, thus preventing the formation of salt scale (e.g. calcium carbonate scale).
  • This solution is also particularly advantageous for reinjection screens which are generally used in the case of high mineral content water (for example geothermal water which carries a high content of silica salts).
  • high mineral content water for example geothermal water which carries a high content of silica salts.
  • the low turbulence which is a feature of the invention, enormously reduces scaling on the reinjection screen.
  • said parallel slats are kept integral with respect to each other by a means selected from the group comprised of:
  • said tubular body is a cylindrical tubular body and said joint elements are a plurality of support rings that are arranged at a distance along the axis of the tubular body.
  • the rings also provide a reinforcement of the structure to make it suitable for deep applications in which buckling loads or specially lateral loads are relevant.
  • said support rings are selected from the group comprised of: open support rings that are provided with open housings where said slats engage along a defined portion, or closed support rings with closed housings where said slats engage along their whole length.
  • the number of said support rings is selected according to the well depth at which said screen is used, in particular, in the case of a depth set between 0 and 50m a stiffening ring is provided at every 20 cm, in the case of a depth set between 50 m and 100 m a stiffening ring is provided every 10 cm and, finally, in the case of a depth beyond 100 m a stiffening ring is provided every 2.5 cm.
  • stiffening elements are provided arranged between said slats. This way, the construction is stronger and is adapted to bear high loads.
  • said stiffening elements are large sized stiffening slats that are uniformly arranged along said tubular body, said stiffening slats having a height that is shorter than or equal to the height of said slats. This way, such stiffening slats do not reduce the screen inner diameter and therefore they do not hinder maintenance of the screen.
  • end elements are provided, in particular ring flanges are provided, which are arranged on the upper face and on the lower face of said tubular body, and which abut against said slats.
  • a method for making such a screen structure for a well comprises the steps of:
  • said step of fixing said parallel slats integral to each other is carried out through a step selected from the group comprised of:
  • said step of prearranging said slats to define a tubular body is carried out through the steps of:
  • said step of providing said joint elements is carried out starting from said slats that are bound together by means of said at least one guide mask, which is withdrawn after application of said joint elements.
  • a step is provided of applying an abutment ring or an abutment flange on the upper face and on the lower face of said tubular body to cover said slats.
  • a reinjection screen structure for a well casing, for reinjecting a fluid comprises:
  • said slats have a cross section selected from the group comprised of: a triangular cross section, said triangular cross section having a base and two sides that extend from said base and meet each other at a vertex opposite to said base, or a trapezoidal cross section obtained by removing said vertex from said triangular cross section, said triangular cross section having a vertex angle set between 8 degrees and 17 degrees.
  • a well 100 for extracting a fluid for example water
  • a wellbore 10 that extends from a ground level 11 through an underground position 12 to reach an aquifer, i.e. a ground water reservoir 20, and also comprises an extraction duct or well casing 21 that is arranged within wellbore 10 down to aquifer or reservoir 20.
  • an extraction duct or well casing 21 that is arranged within wellbore 10 down to aquifer or reservoir 20.
  • extraction duct 21 has a filtration portion or a screen 23, which is arranged proximate to aquifer 20.
  • screen 23 externally retains a selected drainage material 31 at aquifer 20 which is contained between an upper insulation layer 32 and a lower insulation layer 33, i.e. between two plugs, the drainage material adapted to retain impurities and particulate matter from the extracted fluid.
  • screen 23 of the well casing comprises a plurality of parallel slats 40 that are integrally arranged with respect to one another, such that a tubular body 50 is defined.
  • slats 40 are spaced from one another such that tubular body 50 exposes a plurality of longitudinal slits 41 that act as passageways for the fluid ( Fig.3 ).
  • Each slit is defined between two adjacent slats 40.
  • slats 40 define a plurality of solid portions separated by respective void portions, i.e. by longitudinal slits 41, such that the void portions, in use, are arranged in a substantially vertical direction, i.e. they are arranged parallel to a longitudinal axis 51 of the tubular body, as shown in Fig. 3 .
  • slats 40 may be kept integral with respect to each other by means of joint elements that are arranged within tubular body 50 or by means of external joint elements that are arranged outside of the tubular body, in particular a plurality of support rings 70 that are spaced along axis 51 of the tubular body.
  • joint elements may be provided in which slats 40 are inserted, to form a fixed joint.
  • stiffening elements 80 are also provided arranged between slats 40, such that the construction is stronger and is adapted to bear high loads.
  • end elements may be arranged on the upper face and on the lower face of tubular body 50, to abut against slats 40.
  • slats 40 are blades of a predetermined size, said blades tapered along a direction that extends from outside to inside tubular body 50. More in detail, the blades are tapered according to a triangular cross section but alternatively, they may be tapered according to a trapezoidal cross section or to a differently shaped cross section.
  • slats 40 have a cross section that is selected from the group comprised of: a triangular cross section that has a base b and two sides 1 that extend from base b and meet each other at a vertex 45 opposite to base b, or a trapezoidal cross section ( Fig.2A' ) that is obtained by removing vertex 45 from the triangular cross section ( Fig.2A ).
  • the triangular cross section has a vertex 45 angle ⁇ that is set between 8 and 17 degrees. In particular, vertex angle ⁇ is set between 9° and 12°, preferably it is equal to 10°.
  • vertex 45 of the triangular cross section or of the trapezoidal cross section defines a height h with respect to base b.
  • the triangular or trapezoidal cross section has a base-to-height b/h ratio set between 3/20 and 3/10.
  • angle ⁇ formed between sides 1 at vertex 45 which is set between 8.5° and 17°, remarkably reduces fluid turbulence and therefore reduces the fluid pressure drop across the screen.
  • the remarkable turbulence reduction that is achieved by the invention does not cause any loss of gas that might be dissolved in the fluid (e.g. a CO 2 gas), therefore it doesn't give rise to any precipitation of salts that may be present as a solute in the fluid, thus preventing the formation of salt scale (e.g. calcium carbonate scale).
  • blades 40 may have various sizes according to the type and depth of the application for which the screen is used.
  • base b has a length that is set between 1 mm and 20 mm
  • external longitudinal slit has a width d2 set between 0.2 and 5 mm.
  • the latter is responsive to the size of drainage material 31, which is arranged around screen 23.
  • the filter may have various solid-to-void ratios, for example the ratio may be 0.25, 0.50, 0.75, 1, 1.25, 1.5, 1.75 and so on.
  • a 3 mm base b and a 1 mm slit d2 give a 1/4 solid-to-void ratio, which means a 25% filtering capacity.
  • a distance d3 is used between two vertices 45 of two adjacent blades.
  • Such distance is preferably set between 2 mm and 5 mm, most preferably it is set between 3 mm and 4 mm.
  • slits 41 which are arranged between two blades 40, have their minimum cross section width at a side surface of the tubular body, as it can be seen in Fig. 3 . Therefore, by arranging outside of tubular body 50 a granular material 31 of a diameter larger than the minimum width of slits 41, the tubular body peripherally retains the draining granular material and allows the fluid to flow through slits 41. Moreover, the diverging cross section of slits 41 assists possible particulate solids to flow through slits 41, which prevents the formation of a sediment that would otherwise plug the screen.
  • a horizontal speed-vector 60 undergoes a sharp acceleration closely proximate to screen 23, and increases its intensity from some cm/s, which is the speed hat it generally has in aquifer 20, up to an intensity 65 of some m/s, which is the speed the fluid has when it passes from aquifer 20 into the well casing. More in detail, since fluid speed 60, while crossing drainage material 31 and approaching screen 23, gain a vertical component 61 ( Fig. 4a ), the vertically extending slits do not offer any resistance to such vertical speed component, which even before reaching the casing is far greater than the horizontal component 60, i.e.
  • vertically extending slits 41 do not offer any resistance to the vertical speed component 61, which is substantially unaffected by the passage of the fluid through tubular body 50.
  • a method for making such a screen structure for a well comprises the steps of prearranging a plurality of slats 40 in such a way that a tubular body is defined that has a plurality of longitudinal slit passageways 41 for the fluid, wherein each slit is defined between two adjacent slats 40.
  • a subsequent step provides fixing parallel slats 40 integral to one another, and is carried out through a step selected from the group comprised of providing joint elements inside the tubular body, or providing joint elements outside the tubular body, or providing joint elements in which said slats are inserted to form a fixed joint.
  • the step of prearranging slats 40 is carried out by means of at least one guide mask that has a plurality of introduction holes, where the holes are evenly spaced apart with respect to one another and form a geometric figure that corresponds to the cross section of the tubular body. Then the slats are introduced into respective introduction holes.
  • the subsequent step of applying the elements is carried out starting from slats 40 that are bound together by means of said at least one guide mask which is withdrawn after providing said joint elements, for instance one or more circular rings 70, as shown in Fig. 3 .
  • the mask remains inserted within the screen structure and works as a stiffening element, as described above.
  • a step is provided of applying an abutment ring or an abutment flange on the upper face and on the lower face of the tubular body to cover slats 40.
  • blades 40 serve both as a support structure and as a filtration structure, whereas in a wire wrap screen the two functions, i.e. the support structure and the filtering line, are provided by separate means. Therefore, a screen structure is obtained which is well suited and ready for use with any well type and at any depth, and no further adaptation is necessary.
  • Figure 5 shows a fluid extraction well 500, for example a geothermal well, which is combined with a fluid reinjection well 600. This way, the fluid that is extracted from extraction well 500 flows through a heat exchanger 250, heats a working fluid, and is reinjected into the reservoir through reinjection well 600.
  • each well comprises a hole 110 that extends from a ground level 111 through an underground position 120 down to a reservoir 200, and also comprises a well casing 210 that is arranged within hole 110 down to reservoir 200.
  • well casing 210 of reinjection well 600 provides a filtration portion or a reinjection screen 130, which is arranged proximate to aquifer 200.
  • a plurality of filling material layers are provided arranged about well casing 210, which comprise a selected drainage material 310 between an upper insulation layer 320 and a lower insulation layer 330, i.e. between two plugs, in order to retain impurities and particulate matter from the extracted fluid.
  • reinjection screen structure 130 comprises a plurality of slats 140, which are parallel and integral with respect to one another, and are arranged to define a tubular body 150.
  • slats 140 are spaced from one another such that tubular body 150 exposes a plurality of longitudinal slit passageways 141 for the fluid ( Fig.5 and 6 ).
  • Each slit 141 is arranged between two adjacent slats 140.
  • slats 140 define a plurality of solid portions that are spaced by respective void portions, i.e. longitudinal slits 141, such that, in use, the void portions extend along a substantially vertical direction, i.e. they extend parallel to a longitudinal axis 151 of the tubular body, as shown in Fig. 6 .
  • slats 140 are blades of a predetermined size and are tapered along a direction that extends from the inside to the outside of tubular body 150. More in detail, the blades are tapered according to a triangular cross section but alternatively, they may be tapered according to a trapezoidal cross section or to a differently shaped cross section. Constructionally, blades 140 may have various sizes according to type and depth of the application for which the reinjection screen 130 is used. For example, a base b' has a length that is set between 1 mm and 20 mm, whereas an inner longitudinal slit width d2' is set between 0.2 mm and 5 mm.
  • slats 140 have a cross section that is selected from the group comprised of: a triangular cross section that has a base b' and two sides the that extend from base b' and meet each other at a vertex 145 opposite to base b', or a trapezoidal cross section ( Fig.6A' ) that is obtained by removing vertex 145 from the triangular cross section ( Fig.6A ).
  • the triangular cross section has a vertex 145 angle ⁇ that is set between 8 degrees and 17 degrees. In particular, vertex angle ⁇ is set between 9 degrees and 12 degrees, preferably is equal to 10°.
  • vertex 145 of the triangular cross section or of the trapezoidal cross section defines a height h' with respect to base b'.
  • the triangular or trapezoidal cross section has a base-to-height b'/h' ratio set between 3/20 and 3/10.
  • Such solution is also particularly advantageous both for an extraction screen and for a reinjection screen 130, which is normally used in case of high mineral content water (for example, a high silica content geothermal water).
  • high mineral content water for example, a high silica content geothermal water.
  • the low turbulence which is a feature of the invention, enormously reduces scaling on the reinjection screen.
  • filter 130 may have various solid-to-void ratios, for example the ratio may be 0.25, 0.50, 0.75, 1, 1.25, 1.5, 1.75 and so on.
  • a 3 mm base b' and an 1 mm slit width d2' give a 1/4 ratio, which means a 25% filtering capacity.
  • a distance d3' is used between two vertices 145 of two adjacent blades. Such distance is preferably set between 2 mm and 5 mm, most preferably it is set between 3 mm and 4 mm.
  • slits 141 which are arranged between two blades 140, have their minimum cross section width at inner side face 165 of the tubular body, as it can be seen in Fig. 7 .
  • the diverging cross section of slits 141 assists possible particulate solids to flow through slits 141, which prevents the formation of a sediment that would otherwise plug the reinjection screen 130.
  • slats 140 may be kept integral with respect to each other by means of joint elements that are arranged within tubular body 150 or by means of joint elements external that are arranged outside of the tubular body, in particular a plurality of support rings 170 that are spaced along axis 151 of the tubular body.
  • joint elements may be provided in which slats 140 are inserted, to form a fixed joint.
  • stiffening elements 180 which can be seen in Fig. 6 cross sectional view as well, are also provided arranged between slats 140, such that the construction is stronger and is adapted to bear high loads.
  • end elements may be arranged on the upper face and on the lower face of tubular body 150, to abut against slats 140.

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Claims (15)

  1. Structure de crépine (23) pour chemisage de puits, comprenant :
    - une pluralité de volets parallèles (40) faisant bloc entre eux, lesdits volets (40) étant disposés de manière à circonscrire un corps tubulaire (50), lesdits volets (40) étant espacés les uns des autres de manière à ce que ledit corps tubulaire (50) présente une pluralité de passages découpés longitudinalement (41) pour un fluide, chaque fente (41) étant définie entre deux volets adjacents (40),
    caractérisée en ce que lesdits volets (40) ont une section transversale sélectionnée dans le groupe composé de : une section transversale triangulaire qui a une base et deux côtés s'étendant depuis ladite base et se rencontrant à un vertex opposé à ladite base ou une section transversale trapézoïdale qui est obtenue en enlevant ledit vertex de ladite section transversale triangulaire, ladite section triangulaire ayant un angle de vertex défini entre 8 et 17 degrés.
  2. Structure de crépine (23) selon la revendication 1, dans laquelle ledit angle de vertex est défini entre 9 et 12 degrés, de préférence 10°.
  3. Structure de crépine (23) selon la revendication 1, dans laquelle lesdits volets (40) sont des lames de taille prédéterminée, lesdites lames (40) étant effilées dans un sens qui s'étend de l'extérieur vers l'intérieur dudit corps tubulaire (50) afin de créer une crépine d'extraction.
  4. Structure de crépine (23) selon la revendication 1, dans laquelle lesdits volets (40) sont des lames de taille prédéterminée, lesdites lames (40) étant effilées dans un sens qui s'étend de l'intérieur vers l'extérieur dudit corps tubulaire (50) afin de créer une crépine de réinjection.
  5. Structure de crépine (23) selon la revendication 1, dans laquelle lesdits volets parallèles (40) font bloc entre eux grâce à un moyen sélectionné dans le groupe composé :
    - d'éléments de jonction qui sont installés à l'intérieur dudit corps tubulaire (50) ;
    - d'éléments de jonction qui sont installés à l'extérieur dudit corps tubulaire (50) ;
    - d'éléments de jonction qui sont percés de trous dans lesquels lesdits volets (40) sont insérés.
  6. Structure de crépine (23) selon les revendications 1 et 5, dans laquelle ledit corps tubulaire (50) est un corps tubulaire cylindrique et lesdits éléments de jonction sont une pluralité de bagues de support qui sont disposées à distance le long de l'axe du corps tubulaire (50).
  7. Structure de crépine (23) selon la revendication 1, dans laquelle sont prévus des éléments terminaux, en particulier des brides annulaires, qui sont disposés sur la face supérieure et sur la face inférieure dudit corps tubulaire (50) et qui butent contre lesdits volets (40).
  8. Procédé de fabrication d'une structure de crépine (23) pour puits, comprenant les étapes consistant à :
    - prédisposer une pluralité de volets parallèles (40), lesdits volets (40) étant disposés de manière à circonscrire un corps tubulaire (50), lesdits volets (40) étant espacés les uns des autres de manière à ce que ledit corps tubulaire (50) présente une pluralité de passages découpés longitudinalement (41) pour un fluide, chaque fente (41) étant définie entre deux volets adjacents (40) ;
    - fixer lesdits volets parallèles (40) de manière à ce qu'ils fassent bloc entre eux,
    caractérisé en ce que lesdits volets (40) ont une section transversale sélectionnée dans le groupe composé de : une section transversale triangulaire, ladite section transversale triangulaire ayant une base et deux côtés s'étendant depuis ladite base et se rencontrant à un vertex opposé à ladite base ou une section transversale trapézoïdale qui est obtenue en enlevant ledit vertex de ladite section transversale triangulaire, ladite section triangulaire ayant un angle de vertex défini entre 8 et 17 degrés.
  9. Procédé selon la revendication 8, dans lequel ledit angle de vertex est défini entre 9 degrés et 12 degrés, ledit angle de vertex étant en particulier égal à 10°.
  10. Procédé selon la revendication 8, dans lequel ladite étape de fixation desdits volets parallèles (40) de manière à ce qu'ils fassent bloc entre eux est réalisée par une étape sélectionnée dans le groupe composé des opérations consistant à :
    - installer des éléments de jonction à l'intérieur dudit corps tubulaire (50) ;
    - installer des éléments de jonction à l'extérieur dudit corps tubulaire (50) ;
    - installer des éléments de jonction dans lesquels lesdits volets (40) sont insérés.
  11. Procédé selon la revendication 8, dans lequel ladite étape de prédisposition desdits volets (40) de manière à circonscrire un corps tubulaire (50) est réalisée par une étape sélectionnée dans le groupe composé des opérations consistant à :
    - prédisposer au moins un masque de guidage qui a une pluralité de trous d'introduction pour introduire lesdits volets (40), lesdits trous étant espacés uniformément les uns des autres et créant une figure géométrique qui correspond à la section transversale dudit corps tubulaire (50) ;
    - insérer les volets respectifs (40) dans lesdits trous d'introduction.
  12. Procédé selon la revendication 8, dans lequel ladite étape d'installation desdits éléments de jonction est réalisée en commençant par lesdits volets (40) qui sont reliés ensemble au moyen de l'au moins un masque de guidage, qui est retiré après application desdits éléments de jonction, étant prévue en particulier, après ladite étape de retrait, une étape successive dans laquelle l'application d'une bague ou d'une bride de butée est faite sur la face supérieure et sur la face inférieure dudit corps tubulaire (50) pour recouvrir lesdits volets (40).
  13. Utilisation d'une structure de crépine d'extraction (23) selon les revendications 1, 2 et 4 à 7 pour créer un puits pour un fluide de manière à ce que le composant vertical de la vitesse du fluide soit substantiellement non affecté par le passage du fluide de l'extérieur vers l'intérieur de la structure de crépine.
  14. Utilisation d'une structure de crépine (23) pour un chemisage de puits selon l'une quelconque des revendications 1 à 6 pour réinjecter un fluide, lesdits volets (40) étant des lames (40) de taille prédéterminée effilées dans un sens qui s'étend de l'intérieur vers l'extérieur dudit corps tubulaire.
  15. Utilisation de la structure de crépine selon la revendication 14, dans laquelle ledit angle de vertex est défini entre 9 degrés et 12 degrés, ledit angle de vertex étant de préférence de 10°.
EP10763418.0A 2009-06-11 2010-06-11 Tube filtre pour puits et son procédé de fabrication Not-in-force EP2440743B1 (fr)

Applications Claiming Priority (2)

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ITPI2009A000073A IT1400406B1 (it) 2009-06-11 2009-06-11 Struttura di tubo-filtro per un pozzo e metodo per realizzarlo
PCT/IB2010/001413 WO2010143060A1 (fr) 2009-06-11 2010-06-11 Tube filtre pour puits et son procédé de fabrication

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EP2440743A1 EP2440743A1 (fr) 2012-04-18
EP2440743B1 true EP2440743B1 (fr) 2016-03-30

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US10376947B2 (en) 2014-12-30 2019-08-13 Baker Hughes, A Ge Company, Llc Multiple wire wrap screen fabrication method
US10000993B2 (en) 2015-04-29 2018-06-19 Baker Hughes, A Ge Company, Llc Multi-gauge wrap wire for subterranean sand screen
US9925572B2 (en) 2015-07-10 2018-03-27 NGL Solids Solutions, LLC Devices, systems, and processes for cleaning the interiors of frac tanks
US9656308B2 (en) 2015-07-10 2017-05-23 NGL Solids Solutions, LLC Systems and processes for cleaning tanker truck interiors
US10589287B2 (en) 2015-07-10 2020-03-17 NGL Solids Solutions, LLC Systems and methods for oil field solid waste processing for re-injection
US20170051584A1 (en) * 2015-08-17 2017-02-23 Baker Hughes Incorporated Sand screen
US11428079B2 (en) 2019-05-29 2022-08-30 Exxonmobil Upstream Research Company Material control to prevent well plugging
US11911732B2 (en) 2020-04-03 2024-02-27 Nublu Innovations, Llc Oilfield deep well processing and injection facility and methods

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WO2010143060A1 (fr) 2010-12-16
IT1400406B1 (it) 2013-05-31
EP2440743A1 (fr) 2012-04-18
ITPI20090073A1 (it) 2010-12-12

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