WO2010057591A1 - Dispositif de séparation de particules de sable et de roche - Google Patents

Dispositif de séparation de particules de sable et de roche Download PDF

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Publication number
WO2010057591A1
WO2010057591A1 PCT/EP2009/008021 EP2009008021W WO2010057591A1 WO 2010057591 A1 WO2010057591 A1 WO 2010057591A1 EP 2009008021 W EP2009008021 W EP 2009008021W WO 2010057591 A1 WO2010057591 A1 WO 2010057591A1
Authority
WO
WIPO (PCT)
Prior art keywords
separating device
annular discs
sleeve
discs
materials
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.)
Ceased
Application number
PCT/EP2009/008021
Other languages
German (de)
English (en)
Inventor
Armin Kayser
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.)
ESK Ceramics GmbH and Co KG
Original Assignee
ESK Ceramics GmbH and Co KG
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 ESK Ceramics GmbH and Co KG filed Critical ESK Ceramics GmbH and Co KG
Priority to EA201170707A priority Critical patent/EA019497B1/ru
Priority to CN200980146002.9A priority patent/CN102216558B/zh
Priority to US13/129,287 priority patent/US8893781B2/en
Priority to EP09753038.0A priority patent/EP2347092B1/fr
Publication of WO2010057591A1 publication Critical patent/WO2010057591A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • E21B43/086—Screens with preformed openings, e.g. slotted liners

Definitions

  • the invention relates to novel separation devices with the aid of sand and rock particles separated in a process for the promotion of liquids or gases from rock wells and the liquids or gases can thus be promoted effectively.
  • Filters made of porous ceramic materials tend to break due to their low fracture toughness.
  • the bending strength is usually less than 30% of that of the corresponding dense material and is therefore not sufficient for the mechanical loads under rock drilling conditions.
  • Another problem is that the abrasion resistance of porous ceramic materials is significantly lower than that of dense ceramic materials.
  • the invention has for its object to overcome the disadvantages of the prior art to provide a separator for the separation of sand and rock particles in the promotion of liquids or gases from rock drilling available, the better wear and abrasion resistance and a smaller tendency to fracture has the known in the prior art separation devices, and is also more resistant to corrosion acids and alkalis and in which there is no rapid clogging of the free filter surface.
  • Separating device for the separation of sand and rock particles in the promotion of liquids or gases from rock drilling, comprising a plurality of stacked and axially braced by a support structure, annular discs made of a brittle material, the discs on its upper side at least three over the circumference of the Having discs evenly spaced spacers, wherein the discs are stacked on each other, that the spacers each lie above the other and that between the individual discs each have a separating gap with a height of 0.05 - 1 mm, preferably 0.2 - 0.5 mm, is available.
  • a separation device for separating sand and rock particles in the promotion of liquids or gases from rock drilling comprising a plurality of stacked and axially braced by a support structure, sleeve-shaped elements made of a brittle material, wherein in the sleeve-shaped elements slots having a slot width of 0.05 - 1 mm, preferably 0.2 - 0.5 mm, are formed.
  • the invention also relates to the use of the separation devices according to the invention for the separation of sand and rock particles in a method for the promotion of liquids or gases from rock drilling.
  • the separation devices according to the invention show a lower tendency to fracture due to bending load than the systems described in US 2004/0050217 A1 and WO 2008/080402 A1.
  • Another advantage of the separation devices according to the invention is that the advantages of abrasion and corrosion resistance come into play through the use of dense, brittle-hard materials, in particular ceramic materials.
  • the term "dense" in connection with the materials according to the invention means that, in contrast to the solutions of the prior art, they are not porous, so that the materials used according to the invention themselves show no filter effect. Abrasion and wear resistance and corrosion resistance of Disconnecting devices according to the invention are thus significantly higher than in the devices of the above-described prior art.
  • the corrosion resistance of the separation devices according to the invention is important because it may be necessary to rinse them free with acids.
  • Another advantage of the separating devices according to the invention is that there is no rapid clogging of the free screen surfaces. Therefore, it is not necessary to purge the separation devices according to the invention regularly, as in the solutions known in the above-mentioned prior art. It is therefore sufficient to purge the separation devices according to the invention in larger time intervals, if necessary, free.
  • the free filter surface of the separation device according to the invention over that of conventional filter solutions in the form of wire windings according to, for example, WO 2008/080402 Al, which is usually less than 10%.
  • the separation devices according to the invention can be introduced into curved boreholes, which represents a further advantage over the systems described in US 2004/0050217 A1 and WO 2008/080402 A1.
  • FIGS. 1a-1g show various views of an annular disc according to a first embodiment of the invention
  • Figures 2a-2d schematically show different views of stacked annular discs according to the first embodiment of the invention
  • Figures 3a-3c different views of stacked and axially braced by a support structure annular discs according to the first embodiment of the invention
  • FIGS. 4a-4c show various views of a bush-shaped, radially slotted element according to a second embodiment of the invention.
  • FIGS. 5a-5c show various views of a bush-shaped, axially slotted element according to the second embodiment of the invention.
  • the separating device comprises annular discs which are simple and economical to manufacture.
  • the production of these annular disks is possible by means of powder metallurgy or ceramic processes in automated mass production.
  • the ring-shaped disks can be produced in the so-called net-shape process, in which the annular disks are pressed from near net shape powders.
  • a complex mechanical processing of the annular discs is not required.
  • the shape and dimensional deviations in the individual annular disks, which are sometimes unavoidable in a sintering process, can be tolerated in a design according to the invention of the separating device.
  • FIG. 1a shows the basic shape of an annular disc 1 according to the invention, which has on its upper side 2 at least three spacers 3 uniformly distributed over the circumference of the discs.
  • Figure Ib shows a sectional view along the line B-B in Figure Ia.
  • FIG. 1 c shows a side view of an annular disc, wherein a spacer is arranged in the region Y.
  • the spacers 3 are preferably formed in the form of spherical sections.
  • Figure Id shows a sectional view along the line A-A in Figure Ia. An enlarged view of the region X by a spacer 3 is shown in FIG.
  • the upper side 2 of the annular disc 1 can be inclined at right angles to the disc axis or sloping inwards with a plane or curved surface. be guided.
  • An inwardly sloping design is advantageous in terms of a reduced tendency to clog the separator.
  • the underside 4 (ring bottom) of the annular discs is preferably sloping inward, preferably concave, as shown in Figure Ie.
  • the ring bottom is designed with a radius R, the concave shape is to understand the ring bottom as a whole.
  • the individual annular disks can easily yield to a bending load according to the design principle of a spherical axial bearing known per se.
  • the outer contours 6 of the annular discs are formed with a chamfer, as illustrated in Figure Ie.
  • the edges may also be rounded. This represents an even better protection of the edges from the edge load which is critical for brittle-hard materials.
  • FIG. 1 A perspective view of an annular disc according to the invention is shown in FIG.
  • the inner diameter of the annular discs is preferably less than 90%, more preferably less than 85% of the outer diameter of the annular discs, and the radial wall thickness of the annular discs is preferably at least 2.5 mm.
  • the thickness of the disks is preferably 2 to 20 mm, more preferably 2 to 10 mm.
  • the annular discs may have an anti-rotation, as shown for example by the grooves 1 1 in Figure Ia and Figure Ig. This ensures that at an axial load no bending moments occur on the annular discs and the axial load always acts on the support points.
  • the annular discs are suitable for the material only under pressure. The annular discs are used to form a device according to the invention
  • FIG. 2a shows a top view of a stack of annular disks 1 according to the invention.
  • FIG. 2b shows a sectional view along the line A-A from FIG. 2a.
  • Stacking the annular discs are the 120 ° to each other arranged spacers 3 each one above the other, so that the axial load introduction takes place in the axis of the three spacers.
  • the edge loads which are critical for brittle-hard materials are avoided and a three-point support at the desired contact points is achieved even with annular disks with deviations in shape.
  • a separating gap 5 with a height of 0.05-1 mm, preferably 0.2-0.5 mm.
  • Figure 2c shows schematically a side view of a stack of annular discs 1 to form the separating gaps 5.
  • Figure 2d is a perspective view of a cut-open ring stack.
  • FIGS. 3a-3c A separating device according to the invention consisting of stacked annular disks, which are braced axially by means of a support structure, is shown in FIGS. 3a-3c.
  • the support structure is in this case designed in the form of a perforated support tube 7.
  • FIG. 3 a shows a top view of the separating device according to the invention.
  • FIG. 3b is a sectional view taken along line A-A in FIG. 3a
  • FIG. 3c is a perspective view of a cut-away separator according to FIGS. 3a and 3b.
  • the support tubes 7 are mounted externally in Figures 3a-3c, but may also be arranged inside.
  • the support tubes must have arbitrarily shaped passages 16 for the medium to be delivered.
  • the dimensions of the Passages 16 must be larger than the filter column, not in turn as
  • the support tubes By the support tubes, the axial alignment and the axial clamping of the ring disc stack is guaranteed. Via attached to the support tubes 7 flanges 14 a connection of two or more stacking packages is made possible. Furthermore, the forces occurring during the introduction of the separating device into the bore or at the distance from the bore are transmitted via the support tubes 7. In an external support tube, the separation device is protected from occurring by rocks in the borehole impact load.
  • the support tubes can be executed with and without gap to the ring stack.
  • a design with gap allows better use of the filter surface and better rinsing of the disk stack.
  • the support tubes 7 brace over spring elements 15 the disk stack and thus avoid widening of the filter gap 5 even when introduced into curved holes.
  • the spring elements may be formed, for example, as steel springs or elastomer springs.
  • the basic function of the separating device according to the invention shown by way of example in FIGS. 3a-3c is the separation of the liquid or gas mixture flowing from the outside with sand or rock particles from the flow of liquid or gas present on the inside. All particles which are larger than the separating gap 5 between two adjacent disks 1 are effectively separated from the flow.
  • the dimensions of the individual annular disks described above allow a high mechanical load in the application and good process reliability in the production.
  • the annular disc width has no decisive influence on the separation function. Deviating dimensions are therefore possible.
  • the height of the annular discs is crucial for the proportion of free filter surface. The annular disc height is therefore a compromise between mechanical load capacity and maximum delivery capacity. It is to be adapted to the strength properties of the material and the load.
  • the radius of the spherical thrust bearing is preferably 5 to 50 times, more preferably 10 to 40 times, the outer diameter of the annular discs.
  • the radius of the spacer formed in the form of spherical sections depends on the desired separating gap and the width of the annular disc and results constructively from both values.
  • Typical separation gaps have a height between 0.2 and 0.5 mm and are based on the grain size of the rock sand to be separated and the maximum permissible particle size in the product stream.
  • the dimension of the separating gap corresponds to the maximum permissible particle size in the delivery flow.
  • the free filter area is in a specific design example with an annular disc height of a total of 3 mm with a gap height of 0.4 mm already 13%. With correspondingly lower annular disc heights, the free area ratio can be increased even further.
  • the limitation of the maximum free area ratio is only due to the mechanical load capacity of the annular discs. This in turn depends on the support structure and the material strength.
  • the separating device comprises a plurality of stacked and axially clamped by a support structure, sleeve-shaped elements in which slots are provided by mechanical processing.
  • the slots can be arranged radially and / or axially to the bushing axis.
  • Figures 4a-4c show an embodiment in which the slots 9 are arranged radially to the bushing axis.
  • Figure 4a shows the top view of a bush-shaped element 8.
  • Figure 4b shows a sectional view along the line AA of Figure 4a of the bush-shaped element 8.
  • Figure 4c shows a perspective view of the bush-shaped element 8.
  • FIGS. 5a to 5c show another embodiment of the bush-shaped element 8, in which the slots 10 are arranged axially relative to the bush axis.
  • Figure 5a shows the top view of such a bush-shaped element
  • FIG. 5b shows a sectional view along the line AA of FIG. 5a of the bush-shaped element 8
  • FIG. 5c shows an oblique view of the bush-shaped element 8.
  • this embodiment around the circumference of the bush are three rows of axial slots 10 , which are spaced apart, arranged.
  • Suitable processing methods for incorporating the slots are, for example, multi-wire sawing or wafer sawing. Similar to the height of the separating gap in the first embodiment of the invention, the axial and / or radial slots have a width of 0.05-1 mm, preferably 0.2-0.5 mm, with slot widths of less than 0.4 mm for retention of sands are more preferred.
  • the bush-shaped elements are axially guided and biased by inner or outer support tubes according to the structure in the first embodiment of the inventive separation device. They can thus be arranged in just as high stacks.
  • one bushing end face is concave, the other convex shaped to allow on the principle of the spherical thrust bearing angular mobility of the stack of sleeve-shaped elements.
  • the radius R is preferably 5 to 50 times, more preferably 10 to 40 times the outer diameter of the sleeve-shaped elements eighth
  • the bush height is based on the economically to be manufactured height in
  • the height is for example 80 mm. Such a height can be pressed reliably with conventional pressing powders and axial presses.
  • Spacers are not required in the bush-shaped elements, since the screening effect is carried over the slots introduced. However, it may also be the same design as in the first embodiment in terms of spacer and anti-rotation.
  • the construction with bush-shaped elements is advantageous over a structure with annular disks in that a smaller number of components is necessary to provide a separating device according to the invention.
  • the generally higher strength of the bushes compared to the ring discs is somewhat reduced by the necessary slots for a high free filter area.
  • the free filter surface of the bush-shaped elements is a compromise between the mechanical load capacity of the bushings and the maximum free filter surface, similar to the annular disks. With the same mechanical load capacity, the maximum free filter area in the first embodiment with annular discs is higher than in the second embodiment with bush-shaped elements.
  • the inner diameter of the sleeve-shaped elements is preferably less than 90%, more preferably less than 85% of the outer diameter of the sleeve-shaped elements and the radial wall thickness of the sleeve-shaped elements is preferably at least 2.5 mm.
  • the outer diameter of both the annular discs in the first embodiment and the sleeve-shaped members in the second embodiment is preferably 50-200 mm.
  • the mechanical loads on the brittle-hard annular disks and the bush-shaped elements can be further reduced if a plastic film is arranged as an intermediate ring between the annular disks or the bush-shaped elements and / or the lower sides of the annular conveyor. Migen discs or the sleeve-shaped elements are coated with a plastic layer. As a result, in particular high point loads are reduced to the brittle-hard annular disks. Consequently, either the annular disc height can be reduced or the mechanical load capacity can be increased at the same height.
  • the suitable plastics can be selected depending on the temperature and the pumped medium. For temperatures below about 100 ° C. and conveying, for example, water, simple standard plastics, such as polypropylene and polyethylene, can be used. At temperatures up to about 140 ° C so-called engineering plastics are necessary, such as polyamide or polyoxymethylene (POM). At temperatures up to about 200 0 C and promotion of oil or gas so-called high-temperature plastics can be used. Materials such as polyetheretherketone (PEEK) or polytetrafluoroethylene (PTFE) still have good resistance under these conditions. The resistance of the film or coating to abrasive wear can be significantly increased by reinforcement with ceramic fillers.
  • the brittle-hard material of the annular disks or the bush-shaped elements is preferably selected from oxidic and non-oxidic ceramic materials, mixed ceramics from these materials, ceramic materials with addition of secondary phases, mixed materials with proportions of ceramic hard materials and metallic binder phase, precipitation-hardened cast materials, powder metallurgy Materials with in-situ formed hard material phases and long and / or short fiber reinforced ceramic materials.
  • oxidic ceramic materials are Al 2 O 3 , ZrO 2 , mullite, spinel and mixed oxides.
  • non-oxidic ceramic materials are SiC, B 4 C, TiB 2 and Si 3 N 4 .
  • Ceramic hard materials are, for example, carbides and borides.
  • mixed materials with metallic binder phase are WC-Co, TiC-Fe and TiB 2 -FeNiCr.
  • in-situ formed hard material phases are chromium carbides.
  • An example of fiber-reinforced ceramic materials is C-SiC.
  • the above-mentioned materials are characterized by being harder than the typically occurring rock particles, ie the HV or HRC hardness values of these materials are above the corresponding values of the surrounding rock. All of these materials are characterized by the fact that they have a greater brittleness than typical unhardened steel alloys. In this sense, these materials are referred to herein as "brittle hard”.
  • materials with a density of at least 90%, more preferably at least 95%, of the theoretical density are used in order to achieve the highest possible hardness values and high abrasion and corrosion resistance.
  • SSiC sintered silicon carbide
  • boron carbide are used as the brittle-hard material. These materials are not only abrasion resistant, but also corrosion resistant to the acids commonly used for purging the separator, such as HCl.
  • SSiC materials with a fine-grained microstructure are marketed, for example, under the name EKasic® F by ESK Ceramics GmbH & Co. KG.
  • coarse-grained SSiC materials for example with a bimodal microstructure, with preferably 50 to 90% by volume of the particle size distribution consisting of prismatic, platelet-shaped SiC crystallites having a length of 100 to 1500 ⁇ m and 10 to 50% by volume. from prismatic, platelet-shaped SiC crystallites having a length of 5 to less than 100 ⁇ m (EKasic® C from ESK Ceramics GmbH & Co. KG).
  • the outer diameter of the filter ring discs is 100 mm, the inner diameter is 80 mm.
  • the annular disc height is 3 mm.
  • the radius R of the spherical thrust bearing (see Fig. Ie) is 2000 mm.
  • the annular gap between two adjacent annular discs is 0.4 mm in each case.
  • the radius of the three spherical section spacers on the annular discs is 25 mm.
  • the wall thickness of the metallic support cage is 3 mm (see Fig. 3b and 3c).
  • the free filter area is 13%.
  • the total length of the separator is in the example 1000 mm, this corresponds to 294 slices with o.g. Dimensions in the disk stack.
  • the material SSiC (EKasic® F) is used.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Filtering Materials (AREA)
  • Rolling Contact Bearings (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Dans un premier mode de réalisation, l'invention concerne un dispositif de séparation de particules de sable et de roche lors de l'extraction de liquides ou de gaz contenus dans des forages de roche, comportant une pluralité de disques annulaires réalisés dans un matériau dur cassant, empilés les uns sur les autres, précontraints axialement au moyen d'une structure support. Sur leur côté supérieur, les disques présentent au moins trois espaceurs répartis uniformément sur la périphérie circulaire des disques, les disques étant empilés de telle manière que les espaceurs sont respectivement superposés et qu'un espace de séparation d'une hauteur de 0,05 à 1 mm, de préférence de 0,2 à 0,5 mm est respectivement présent entre les disques individuels. Dans un deuxième mode de réalisation, l'invention concerne un dispositif de séparation de particules de sable et de roche lors de l'extraction de liquides ou de gaz contenus dans des forages de roche, comportant une pluralité d'éléments en forme de douilles réalisés dans un matériau dur cassant, empilés les uns sur les autres, précontraints axialement au moyen d'une structure support. Les éléments en forme de douilles présentent des fentes d'une épaisseur de 0,05 à 1 mm, de préférence de 0,2 à 0,5 mm.
PCT/EP2009/008021 2008-11-18 2009-11-10 Dispositif de séparation de particules de sable et de roche Ceased WO2010057591A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EA201170707A EA019497B1 (ru) 2008-11-18 2009-11-10 Разделительное устройство для отделения частиц песка и породы
CN200980146002.9A CN102216558B (zh) 2008-11-18 2009-11-10 用于除去沙粒和石头颗粒的分离装置
US13/129,287 US8893781B2 (en) 2008-11-18 2009-11-10 Separating device for removing sand and rock particles
EP09753038.0A EP2347092B1 (fr) 2008-11-18 2009-11-10 Dispositif de séparation de particules de sable et de roche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008057894.0 2008-11-18
DE102008057894A DE102008057894A1 (de) 2008-11-18 2008-11-18 Trennvorrichtung zur Abtrennung von Sand- und Gesteinspartikeln

Publications (1)

Publication Number Publication Date
WO2010057591A1 true WO2010057591A1 (fr) 2010-05-27

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Application Number Title Priority Date Filing Date
PCT/EP2009/008021 Ceased WO2010057591A1 (fr) 2008-11-18 2009-11-10 Dispositif de séparation de particules de sable et de roche

Country Status (6)

Country Link
US (1) US8893781B2 (fr)
EP (1) EP2347092B1 (fr)
CN (1) CN102216558B (fr)
DE (1) DE102008057894A1 (fr)
EA (1) EA019497B1 (fr)
WO (1) WO2010057591A1 (fr)

Cited By (1)

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EP3670828A1 (fr) * 2018-12-18 2020-06-24 3M Innovative Properties Company Dispositif de séparation et utilisation d'un dispositif de séparation

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DE102008057894A1 (de) * 2008-11-18 2010-06-02 Esk Ceramics Gmbh & Co. Kg Trennvorrichtung zur Abtrennung von Sand- und Gesteinspartikeln
EP2662124B1 (fr) * 2009-07-20 2016-11-09 3M Innovative Properties Company Dispositif de séparation pour dispositifs à écoulement tubulaires
US9347295B2 (en) 2012-11-14 2016-05-24 Schlumberger Technology Corporation Filtration system and method for a packer
US9695675B2 (en) 2014-01-03 2017-07-04 Weatherford Technology Holdings, Llc High-rate injection screen assembly with checkable ports
GB201401066D0 (en) * 2014-01-22 2014-03-05 Weatherford Uk Ltd Improvements in and relating to screens
DK2980348T3 (en) * 2014-07-30 2017-10-02 3M Innovative Properties Co SEPARATOR FOR SEPARATING SOLID PARTICLES FROM HIGH-DIFFERENCE LIQUID AND GAS FLOWS
CA2908009C (fr) 2014-10-09 2018-05-15 Weatherford Technology Holdings, Llc Formes de cables ameliorees resistant a l'erosion
EP3336305A1 (fr) 2016-12-19 2018-06-20 3M Innovative Properties Company Dispositif de séparation, procédé de fabrication d'un dispositif de séparation et utilisation d'un dispositif de séparation
WO2019056112A1 (fr) 2017-09-25 2019-03-28 1460798 Alberta Ltd. Dispositif pour la séparation de solides d'un courant de fluide
EP3477043A1 (fr) 2017-10-26 2019-05-01 3M Innovative Properties Company Dispositif de séparation et utilisation d'un dispositif de séparation
EP3604734B1 (fr) * 2018-08-01 2021-10-20 3M Innovative Properties Company Dispositif de séparation et utilisation d'un dispositif de séparation
WO2020047649A1 (fr) 2018-09-06 2020-03-12 1460798 Alberta Ltd. Déflecteur anti-tourbillon à contre-flux
CN113167111A (zh) * 2018-12-10 2021-07-23 3M创新有限公司 分离装置和分离装置的用途
EP3760831B1 (fr) 2019-07-03 2022-03-23 3M Innovative Properties Company Dispositif de séparation et utilisation d'un dispositif de séparation
EP3779121A1 (fr) 2019-08-14 2021-02-17 3M Innovative Properties Company Dispositif de séparation et utilisation d'un dispositif de séparation
US12006800B2 (en) 2020-04-21 2024-06-11 Weatherford Technology Holdings, Llc Screen assembly having permeable handling area
EP3922810A1 (fr) 2020-06-10 2021-12-15 3M Innovative Properties Company Dispositif de séparation et utilisation d'un dispositif de séparation
CN112081563B (zh) * 2020-10-27 2024-10-29 山东荣正石油科技有限公司 石油防砂筛管

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EP2347092B1 (fr) 2019-12-25
US20110220347A1 (en) 2011-09-15
CN102216558A (zh) 2011-10-12
EP2347092A1 (fr) 2011-07-27
US8893781B2 (en) 2014-11-25
CN102216558B (zh) 2016-03-23
DE102008057894A1 (de) 2010-06-02
EA019497B1 (ru) 2014-04-30
EA201170707A1 (ru) 2011-10-31

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