EP2153020A2 - Appareil et procédé d'étirement d'éléments tubulaires - Google Patents

Appareil et procédé d'étirement d'éléments tubulaires

Info

Publication number
EP2153020A2
EP2153020A2 EP08750010A EP08750010A EP2153020A2 EP 2153020 A2 EP2153020 A2 EP 2153020A2 EP 08750010 A EP08750010 A EP 08750010A EP 08750010 A EP08750010 A EP 08750010A EP 2153020 A2 EP2153020 A2 EP 2153020A2
Authority
EP
European Patent Office
Prior art keywords
tubular element
expansion
tubular elements
expanding
tool
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.)
Withdrawn
Application number
EP08750010A
Other languages
German (de)
English (en)
Inventor
Wilhelmus Christianus Maria Lohbeck
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.)
Enventure Global Technology Inc
Original Assignee
Dynamic Dinosaurs BV
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 Dynamic Dinosaurs BV filed Critical Dynamic Dinosaurs BV
Publication of EP2153020A2 publication Critical patent/EP2153020A2/fr
Withdrawn legal-status Critical Current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
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • 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
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/105—Expanding tools specially adapted therefor

Definitions

  • This invention relates to methods and apparatus for expanding tubular elements such as casing or other tubulars that are typically installed in wells such as oil or gas wells, or tubulars of surface, subsea or subsurface pipelines. Even further the invention relates to systems which employ such methods and apparatus for expanding tubular elements.
  • Tubular elements such as casing and completion tubing, screens and other such devices are well known in the field of oil and gas wells. In order for them to be installed in the well, it is necessary that they have an outer diameter that is less than the inner diameter of the borehole in which they are to be installed. In fact, since the inner diameter of the borehole can vary and the trajectory of the borehole is often not straight, the maximum possible diameter can be significantly less than that of the borehole at any point.
  • expansion tools have been proposed that are initially positioned in a contracted state and then are reconfigured into their operational or deployed configuration before being moved and forged through the casing.
  • the deployed outer diameter is still greater than the inner diameter of the casing, this must be done in an open section of the well or in a section of wider diameter, since the forces used in deployment are normally not large enough to expand the tubular.
  • This invention achieves this object by the use of a compressible member on an expanding tool that can be squeezed to provide an expansion surface on an expansion tool that can fit in the unexpanded tubular element.
  • One aspect of this invention provides an apparatus for expanding tubular elements, comprising:
  • an axially compressible expansion body mounted on the tool body such that the outer surface of the expansion body is substantially the same outer diameter as that of the tool body; and - means for axially compressing the expansion body such that its outer surface is expanded beyond the outer diameter of the tool body.
  • the expansion body may comprise one or more rings.
  • the expansion body may comprise a cylinder.
  • the expansion body can be mounted coaxially on a longitudinal axis of the tool body.
  • the expansion body is made from a flexible and elastic material such as polyurethane.
  • the expansion body may be comprised of more than one section.
  • the means for axially compressing the expansion member can comprise a pair of surfaces on the tool body arranged such that the expansion body can be squeezed therebetween.
  • the pair of surfaces comprises a first surface that is fixed on the tool body and a second surface that is moveable of the tool body.
  • the first surface and the second surface may be substantially perpendicular to the longitudinal axis of the tool body.
  • the first surface and the second surface may be at different angles to the longitudinal axis of the tool body.
  • the tool body can also comprise a cylinder in which a piston is slidably located, the second surface being formed on the piston.
  • the cylinder is preferably provided with a supply of pressurised fluid (either from surface or via a downhole pump) for causing movement of the piston.
  • the cylinder may have a mechanical arrangement for causing movement of the piston, such as a screw and thread type arrangement.
  • the first surface is fixed to the body by means of an axial shaft around which the expansion body and piston are mounted.
  • the apparatus can further comprise means such as a cable for moving the tool body through the tubular element.
  • means such as a cable for moving the tool body through the tubular element.
  • a "workstring" comprising coiled tubing, drillpipe or other conduit can be used to move the tool body through the tubular element.
  • Another aspect of the invention provides a method for expanding tubular elements, comprising:
  • the method preferably comprises moving the apparatus with the expansion body in its compressed configuration along the tubular element to progressively expand and permanently deform a length of the tubular element.
  • This dynamic mode may require a lubricant which can be a liquid or a sheet or a coating to the inside of the tublar element to ease movement of the apparatus in its expanded form.
  • a lubricant which can be a liquid or a sheet or a coating to the inside of the tublar element to ease movement of the apparatus in its expanded form.
  • the method of the invention is preferably applied to the expansion of tubular elements such as casing or completion or production tubulars installed in wells such as oil or gas wells. It can be used for expansion of the tubular against the borehole wall or against another casing or liner. Alternatively, it can be used to create a bell or expanded region such as a chamber in which another expansion tool can be deployed for further expansion of the tubular. Another application can be to clad a relatively thin steel tube (with or without seals on the outside) against the inside of a deteriorated old tubing, casing, leaking connector, perforation, etc.
  • An application of the apparatus of the invention may be for a device to produce one or more areas of isolation.
  • the areas may be in the annulus of a well or the areas may be selected areas in a tubular of a well.
  • the method of producing these areas of isolation is attained by the expansion of tubular elements in the areas of interest.
  • Another aspect of the invention provides for a liner hanger including an apparatus for expanding tubular elements as described above.
  • the fishing tool may further include a conduit. This conduit may allow for circulation through the fishing tool.
  • the conduit may further allow for circulation through the article to be fished.
  • Another aspect of the invention provides for a wellhead including an apparatus for expanding tubular elements as described above.
  • the apparatus may be used to expand more than one concentric tubular element.
  • an abandonment plug including an apparatus for expanding tubular elements as described above.
  • the apparatus may be used to expand a tubular element in a well to be abandoned.
  • This tubular element may be an additional tubular element inside the casing or liner.
  • the expansion body may be left in an expanded state in the expanded tubular element to form the abandonment plug.
  • the additional tubular element may be expanded so as to close the micro-annulus around the casing or liner.
  • Another aspect of the invention provides for an expandable sand screen including an apparatus for expanding tubular elements as described above.
  • Another aspect of the invention provides for a well pressure tester including an apparatus for expanding tubular elements as described above.
  • the apparatus for expanding tubular elements in the well pressure tester preferably uses expansion of a compressible expansion body substantially to form a seal against the tubular element.
  • Another aspect of the invention provides for a pile expander including an apparatus for expanding tubular elements as described above.
  • Another aspect of the invention provides for a bridge plug including an apparatus for expanding tubular elements as described above.
  • the bridge plug may be permanent or it may be retrievable.
  • This tubular element to be expanded may be an additional tubular element inside the casing or liner.
  • the apparatus for expanding tubular elements in the well pressure tester preferably uses expansion of a compressible expansion body substantially to form a seal against the tubular element.
  • This tubular element to be expanded may be an additional tubular element inside the casing or liner.
  • the apparatus for expanding tubular elements in the well pressure tester preferably uses expansion of a compressible expansion body substantially to form a seal against the tubular element.
  • Another aspect of the invention provides for a pipe connector including an apparatus for expanding tubular elements as described above.
  • the pipe connector is a swage type pipe connector.
  • Another aspect of the invention provides for a selective chemical placement tool including an apparatus for expanding tubular elements as described above.
  • the selective chemical placement tool may be slidably displaceable.
  • Another aspect of the invention provides for an anchor device including an apparatus for expanding tubular elements as described above.
  • the anchor device may be used to anchor a tubular element or other equipment against the formation or another tubular element.
  • Another aspect of the invention provides for a bellow expander including an apparatus for expanding tubular elements as described above.
  • the bellow expander may be used to relieve buckling or axial stresses in the tubular element.
  • Another aspect of the invention provides for a downhole patching system including an apparatus for expanding tubular elements as described above.
  • the downhole patching system may be used to repair casing or liner damage, or leaking connectors. It may further include a sealing element.
  • Another aspect of the invention provides for a perforation shut off patch system including an apparatus for expanding tubular elements as described above.
  • the perforation shut off patch may further include a sealing element.
  • Another aspect of the invention provides for a telescopic liner expansion system including an apparatus for expanding tubular elements as described above.
  • Figure 1 shows a schematic side view of an apparatus according to one embodiment of the invention
  • Figure 2 shows a schematic side view of detail of the head section of the apparatus of Figure 1 ;
  • Figure 3 shows a schematic side view of detail of the head section of the apparatus of Figure 1 in a different position
  • Figure 4 shows a schematic side view of the apparatus of Figure 3 in situ
  • Figure 5 shows a schematic side view of the apparatus of Figure 4 in an expanded section of casing
  • Figure 6 shows a schematic side view of a liner lap expansion application of the apparatus of the invention
  • Figure 7 shows a schematic side view of an application of the apparatus of the invention used to pressure test a liner lap and then used to pressure test the liner;
  • Figure 8 shows a schematic side view of a pressure tester application of the apparatus of the invention.
  • Figure 9 shows schematic side view of a liner bottom expansion application of the apparatus of the invention.
  • Figure 1 shows an apparatus or tooMO according to one embodiment of the invention suspended in a tubular 12 such as a well casing by means of a wireline cable 14 providing power and data communication as well as physical support.
  • the apparatus of tool 10 comprises a tool body 16 which is provided with power and control electronics, a pump and hydraulic fluid supply and sensors (not shown).
  • An operational head section 18 is provided at the lower end of the tool body 16.
  • Tool 10 may also optionally in a central bore section to allow for circulation (not shown).
  • tubular 12 may be one of a number of tubular elements used in oil or gas wells such as, for example, a casing, a liner, a pipeline, or the like. Tubular 12 may also be one of a number of types of tubulars used in surface, subsea or subsurface pipelines. It will also be understood that tubular 12 may be of a solid, slotted or perforated type.
  • Figure 2 shows detail of the head section 18 which comprises a main head part 20 which is connected to the tool body 16 and defines a cylinder 22 open at its lower end.
  • An axial shaft 24 extends from the base of the cylinder 22 and has an end plate 26 connected thereto.
  • a piston 28 is slidably mounted in the cylinder 22 around the shaft 24.
  • the head 30 of the piston 28 has a larger diameter than the part 32 received in the cylinder bore 22, the outer diameter of the head 30 corresponding approximately to the outer diameter of the tool body 16.
  • a polyurethane ring 34 is mounted around the shaft 24 between the piston head 30 and the end plate 26. This too has an outer diameter corresponding approximately to the outer diameter of the tool body 16.
  • the working space 36 in the cylinder 22 below the piston 28 is connected to a supply of pressurised fluid (not shown) in the tool body 16.
  • a ring 34 there may be a thick walled cylinder mounted around the shaft 24 between the piston head 30 and the end plate 26, and this cylinder may serve as an expansion body in tool 10.
  • the material from which the ring 34 or the cylinder is made may be other kinds of flexible and elastic material such as, for example, rubber.
  • the ring 34 or the cylinder may be comprised of more than one section, which may form separate segments. These segments may be housed in compartments specifically shaped therefore in the area around the shaft 24, between the piston head 30 and the end plate 26.
  • the tool 10 has a substantially constant outer diameter and can be run in the casing 12 to any location of interest.
  • the tool 10 is used to make a 'bell' or section of enlarged diameter know as a chamber in the casing 12 such as might be used for deployment of a conventional expanding tool.
  • the tool can be moved downwards, for example, by using a heavy drillstring in a near vertical well.
  • the tool 10 is lowered to its start depth on the cable 14, or by coiled tubing, pipe, as the case may be and then raised to expand the length L of casing 12. It is also possible to start the expansion at the top of the section of casing and force the tool down, for example by pumping pressurised fluid into the casing above the tool 10.
  • Various alternatives are also available to the piston and cylinder arrangement described for squeezing the ring. For example, various types of mechanical arrangements may be used such as a powered screw and nut or rack and pinion arrangement can be used either to move a piston in the manner described above or, alternatively, to hold the 'piston' still and draw the end plate towards it to obtain the same effect.
  • Various sensors can be provided in the tool to monitor its operation and provide feedback, typically via the cable, to allow accurate control of the tool in use.
  • the expansion provided can be used in the manner of previously proposed expansions, for example, to avoid cementing and progressive reduction in the flow diameter of the well, connection of sections of casing, forming of expanded sections for insertion of a succeeding casing section, expansion of a patch over open borehole or existing casing, etc.
  • a sealing element such as an o-ring or coating may be placed over the expansion body to give a more resilient seal.
  • the expansion body being one or more rings 34 or one or more sleeves may be enclosed in a protective cover such as a cage arrangement which is used to provide the expansion body with more wear resistance and a longer lifespan.
  • a protective cover such as a cage arrangement which is used to provide the expansion body with more wear resistance and a longer lifespan.
  • the expansion effect may vary according to the dimensions of the tool, in particular the dimensions of the polyurethane ring.
  • a thicker ring will allow potentially greater expansion from the original diameter, as will a larger plunger or bore stroke.
  • polyurethane is the preferred material for the ring due to its resilience, in particular its ability to return to its original dimensions after compression is released, as well as its greater wear ability, impact resistance and greater operational temperature range, other similar materials may be used.
  • Polyurethane is also sufficiently smooth to be able to slide over the casing surface as the tool is moved in its expanded form. A lubricant/teflon-sheet or both can be provided to assist in this, green soap being preferred.
  • the invention may also be used to form one or more localised expansions, such as is shown in Figure 4.
  • a single expansion like this can be used to anchor tubular members together (hangers).
  • a series of these placed relatively closely together can be used for stress relief or to prevent buckling should the tubular be deformed following installation or later in the lifetime of a well. This deformation may be for a variety of reasons such as, for example, the depletion of a well leading to compaction.
  • the whole tool 10 By leaving the head section in place as is shown in Figure 4, the whole tool 10 can serve as an anchor to provide a reaction to allow movement of another tool connected to it through the well.
  • Reinforcement may be required for effective use in dynamic expansion and for better grip, such as in the required in a bridge plug or packer. Cutters, wear resistant pads, etc can be mounted/cast within the ring. Also, multiple rings may be expanded by one or more pistons. Other uses and variations of the technique will be apparent.
  • the anchor device may be used to anchor a tubular element or other equipment against the formation or another tubular element at selected locations in the wellbore.
  • the invention may be applied to expansion of tubular elements against the borehole wall or against another casing.
  • the invention can extend to a telescopic liner expansion system which includes the apparatus for expanding tubular elements as described above.
  • Three liners, for example, can be run down a hole at the same time, one inside the other. Each liner can then be extended and the apparatus for expanding tubular elements used to expand each of them.
  • the invention may also be used to form a bell or expanded section, known as a chamber in the art, in which another expansion tool can be deployed for further expansion of the tubular.
  • the bell or expanded section, or chamber may be used for other purposes as well in drilling or completion operations in oil or gas wells. Expanded section 40 shown in Figure 5 is an example of such a chamber.
  • the shape of the bell or expanded section, or chamber that is formed may be symmetrical or asymmetrical.
  • Asymmetrical expansion may be accomplished by using a ring 34 which has an asymmetrical shape such as an oval shape. In this case the piston head 30 and the end plate 26 must first be centralised, so that the ring 34 does not move into a position to give symmetrical expansion during use.
  • One of the ways in which asymmetrical expansion is beneficial is when it is used to create a weak point or a specific crack in the casing so that a side passage can be put into the casing at that point.
  • the bell or expanded section could be used to locate anything that would otherwise cause a restriction downhole.
  • the apparatus would have to be centralised firmly when used in this way. It could thus, for example, be used to house a sub-surface safety valve, pump, separator, etc.
  • Another application of the apparatus for expansion of tubular elements can be to clad a relatively thin steel tube (with or without seals on the outside) against the inside of a deteriorated old tubing, casing, leaking connector, perforation, etc. Substantially smaller sections or larger sections of tubular can be clad by the apparatus.
  • the cladding may, for example, be used to store carbon dioxide gas in a depleted reservoir, enlarge production tubing or repair leaks.
  • a further similar application of the apparatus is that it can be used to create a patch or pad downhole for holding sensors that are focused in one direction close to a borehole wall. Similar applications of the apparatus are for a downhole patching system and a perforation shut off patch system.
  • the downhole patching system may be used to repair casing or liner damage, or leaking connectors.
  • the patching system may further include a sealing element, such as an o-ring on the outer diameter (OD).
  • the apparatus may also be used in the expansion of tubular elements to produce areas of isolation. These areas may be in the annulus of a well or these areas may be at selected zones of a well. These zonal areas of isolation, for example, can be used to squeeze off selective sections for shut off, acid injections, chemical sand consolidation, or the like.
  • Another application of the apparatus may be for a sand screen.
  • a further application of the apparatus of the invention is for a liner hanger.
  • the liner hanger may be for use with liners, casing or tubing, as the case may be.
  • the apparatus is preferably used with a sleeve in combination with a sealing element such as an o-ring on the OD.
  • the expandable fishing tool may include a conduit through its body. This allows for circulation through the fishing tool.
  • the conduit also allows for circulation through the article to be fished.
  • the article is preferable the tubular element and the conduit thus allows circulation through the whole of the tubular element including its bottom end in the wellbore.
  • the expandable fishing tool has the advantage of including a larger surface area, which may even create a recess, and thus there is a better grip for the fish, or article to be fished.
  • the apparatus may be used to expand more than one concentric tubular element at the wellhead. Preferably there may be four or five concentric elements at the wellhead which are expanded by the apparatus of the invention.
  • the advantage of this expandable wellhead is that it is then more rigid or robust than conventionally formed wellheads, particularly those used offshore.
  • a further advantage is that a wellhead with a smaller OD can be made.
  • the apparatus of the invention may also be used in an abandonment plug.
  • the tubular element that is expanded in the abandonment plug may be an additional tubular element inside the casing or liner.
  • Such an abandonment plug may comprise a tube with one open end and one closed end with or without seals around its OD that is expanded against the casing or liner to shut in the well and simultaneously close the micro- annulus.
  • the expansion used against the casing may be minor and is used to close off the micro-annulus.
  • the apparatus may be used to expand the additional tubular element in a well to be abandoned and the expansion body may be left in an expanded state in the expanded tubular element.
  • the abandonment plug may also include a steel sleeve which is also expanded against the casing together with one or more rings 34.
  • the abandonment plug may be used with or without cement and may be deployed by wireline, coiled tubing or other conduit.
  • Another application of the apparatus of the invention is for an expandable sand screen.
  • the apparatus may also be used in perforated liner and casing expansions.
  • a further application of the apparatus of the invention is for a well pressure tester.
  • the well pressure tester can be used to pressure test various parts of oil or gas wells such as, for example, a liner lap, the drill pipe, or the formation cementation.
  • the apparatus for expanding tubular elements in the well pressure tester preferably uses expansion of an expansion body substantially to form a seal against the tubular element and not to expand the tubular element beyond its original shape.
  • the apparatus of the invention in this application may include a plurality of rings 34 as shown in Figure 8. In this example of a pressure tester 44 some of the rings 34 may be used for a packer application to isolate the area of interest and others may be used to expand against the area of interest so as to perform the actual pressure test.
  • the pressure tester 44 may be lowered downhole by wireline 14 having electrical cabling, or by coiled tubing or workstring.
  • a pump or pressure intensifier 46 is also lowered downhole along with the pressure tester 44 to provide the pressure used in the pressure test.
  • the pressure may also be supplied by an integrated pressure multiplier, or by other means of supplying pressure.
  • a packer itself is yet another application of the apparatus of the invention.
  • the packer may be a permanent installation in the wellbore or may be retrievable and it is used to seal the wellbore either permanently or temporarily.
  • the tubular element to be expanded by the expansion apparatus of the packer may be an additional tubular element inside the casing or liner.
  • the apparatus for expanding tubular elements in the well pressure tester preferably uses expansion of a compressible expansion body substantially to form a seal against the tubular element and not to expand the tubular element beyond its original shape.
  • the packer may be used in production or for testing, and may be used in cased wellbores or in open wellbores. Typically the packer is used in most completions to isolate the annulus from the production conduit, enabling controlled production, injection or treatment of the wellbore.
  • the well pressure tester 44 may also be used as a leakoff test device to test the strength or fracture pressure of the open formation. A section of the wellbore can be sealed off using the apparatus and the pressure tester 44 can then be used along with fluid under pressure in the section to test the maximum fluidic pressure which the well can withstand in that particular section.
  • the leakoff test device may also be used at the liner bottom.
  • the apparatus of the invention may also be used to expand the liner bottom 48 to seal the annulus, as illustrated in Figure 9.
  • Another application of the apparatus of the invention is for a bridge plug which is used to isolate the lower part of a wellbore.
  • the bridge plug may be permanent, enabling the lower part of the wellbore to be permanently sealed off from production, or it may be retrievable enabling the lower part of the wellbore to be temporarily isolate from the treatment conducted on an upper zone of the wellbore.
  • the tubular element expanded by the bridge plug may be an additional tubular element inside the casing or liner.
  • the apparatus for expanding tubular elements in the well pressure tester preferably uses expansion of a compressible expansion body substantially to form a seal against the tubular element and not to expand the tubular element beyond its original size.
  • the advantage of the bridge plug is that it may be able to hold more pressure when it is expanded to a level just below the yield of the tubular element. The result is that it will thus will then have more holding force.
  • the apparatus may also be used in a pipe connector.
  • a pipe, or tubing or casing is expanded to fit substantially tightly against another pipe, tubing or casing, as the case may be, which has been fitted over it and it is then connected using known pipe connection methods.
  • the pipe connector may also be used to connect tubing to casing or to connect a lateral pipe to a central pipe.
  • the pipe connector is a swage type pipe connector.
  • the selective chemical placement tool is typically deployed downhole by coiled tubing, workstring or other conduit.
  • the selective chemical placement tool may be slidably displaceable.
  • the selective chemical placement tool is deployed to a particular area of interest and then expansion takes place by the apparatus so that the tool is anchored in the casing or liner across an area to be treated.
  • Chemical fluid is then injected into the body of the tool between its two outer sections and this chemical fluid may then be able to enter areas outside of the casing or liner, that is in the annulus, by squeezing to perform various chemical treatments such as, for example, sand consolidation and chemical shut-off.
  • the selective chemical placement tool may then be slidably displaced to another location and then be anchored at that position so that another chemical treatment may be performed at this location. In this way the selective chemical placement tool may be moved sequentially down the wellbore to perform sequential chemical treatments where required.
  • the apparatus may also be used as part of a bellow expander.
  • the bellow expander may be used to relieve buckling or axial stresses in a tubular element. It may further also be used to convert global buckling of a pipe or casing to localised buckling.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Metal Extraction Processes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

La présente invention concerne un appareil utilisé pour étirer des éléments tubulaires, cet appareil comprenant un corps principal, un corps extensible axialement compressible installé sur le corps principal de sorte que la surface externe du corps extensible ait sensiblement le même diamètre que celui du corps principal et un moyen de compression axiale du corps extensible de sorte que sa surface externe s'étire au-delà du diamètre externe du corps principal. Un procédé d'étirement d'éléments tubulaires consiste à positionner un appareil tel que celui décrit dans les revendications, à un endroit prédéterminé dans l'élément tubulaire et à comprimer le corps extensible de sorte que sa surface externe s'étire et vienne toucher la paroi interne de l'élément tubulaire et provoque ainsi son étirement et sa déformation permanente. Cette invention porte également sur diverses applications de l'appareil en vue d'étirer des éléments tubulaires.
EP08750010A 2007-05-04 2008-05-02 Appareil et procédé d'étirement d'éléments tubulaires Withdrawn EP2153020A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0708631A GB2448927B (en) 2007-05-04 2007-05-04 Apparatus and method for expanding tubular elements
PCT/EP2008/055442 WO2008135538A2 (fr) 2007-05-04 2008-05-02 Appareil et procédé d'étirement d'éléments tubulaires

Publications (1)

Publication Number Publication Date
EP2153020A2 true EP2153020A2 (fr) 2010-02-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08750010A Withdrawn EP2153020A2 (fr) 2007-05-04 2008-05-02 Appareil et procédé d'étirement d'éléments tubulaires

Country Status (9)

Country Link
US (1) US20100319427A1 (fr)
EP (1) EP2153020A2 (fr)
CN (1) CN101720378A (fr)
AU (1) AU2008248664A1 (fr)
BR (1) BRPI0811505A2 (fr)
CA (1) CA2684913A1 (fr)
GB (1) GB2448927B (fr)
MX (1) MX2009011946A (fr)
WO (1) WO2008135538A2 (fr)

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BRPI0811505A2 (pt) 2018-10-23
GB2448927B (en) 2010-05-05
MX2009011946A (es) 2010-04-07
WO2008135538A2 (fr) 2008-11-13
US20100319427A1 (en) 2010-12-23
AU2008248664A1 (en) 2008-11-13
WO2008135538A3 (fr) 2009-05-07
CN101720378A (zh) 2010-06-02
CA2684913A1 (fr) 2008-11-13
GB2448927A (en) 2008-11-05

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