WO2015043801A2 - Garniture d'étanchéité et procédé associé - Google Patents

Garniture d'étanchéité et procédé associé Download PDF

Info

Publication number
WO2015043801A2
WO2015043801A2 PCT/EP2014/066294 EP2014066294W WO2015043801A2 WO 2015043801 A2 WO2015043801 A2 WO 2015043801A2 EP 2014066294 W EP2014066294 W EP 2014066294W WO 2015043801 A2 WO2015043801 A2 WO 2015043801A2
Authority
WO
WIPO (PCT)
Prior art keywords
mandrel
side pocket
sealing
downhole
cartridge
Prior art date
Application number
PCT/EP2014/066294
Other languages
English (en)
Other versions
WO2015043801A3 (fr
Inventor
Neil Anderson
Colin Mackie
Original Assignee
Swellfix B.V.
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 Swellfix B.V. filed Critical Swellfix B.V.
Priority to AU2014327755A priority Critical patent/AU2014327755A1/en
Priority to US14/909,512 priority patent/US20160208569A1/en
Priority to EP14746997.7A priority patent/EP3052744A2/fr
Priority to CA2923107A priority patent/CA2923107A1/fr
Publication of WO2015043801A2 publication Critical patent/WO2015043801A2/fr
Publication of WO2015043801A3 publication Critical patent/WO2015043801A3/fr

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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • 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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/122—Gas lift
    • E21B43/123—Gas lift valves

Definitions

  • the present invention relates to a method for sealing a side pocket in a downhole mandrel, such as a downhole gas-lift mandrel.
  • the present invention also relates to a sealing insert for use in sealing a side pocket in a downhole mandrel.
  • reservoir fluids such as oil and gas
  • the natural reservoir pressure may allow unaided production of the reservoir fluids to surface.
  • the reservoir pressure may be insufficient to support natural production of reservoir fluids, for example where the pressure is naturally low, or where pressure has diminished over a period of time. To address such cases it is has become known for operators to utilise artificial lift techniques.
  • Gas lift involves introducing a gas at one or more points along the wellbore production tubing to reduce the density of the well fluids and thus allow the reservoir pressure to lift the fluids out of the production tubing.
  • Gas lift may be used in either liquid (e.g., oil) or gas wells.
  • the gas lift mandrel includes a side port which provides fluid communication between the production tubing and the surrounding annulus.
  • the gas lift mandrel typically also includes a side pocket which receives a gas lift valve, wherein the gas lift valve is sealingly engaged within the side pocket, for example via chevron seals, and provides selective control of fluid through the side port.
  • the gas lift valve is provided in the form of a one way valve, in that fluid communication is only permitted into the production tubing, with outflow from the production tubing into the surrounding annulus prevented.
  • US 2005/0061369 discloses a mandrel for a gas lift valve.
  • the gas lift mandrel could become damaged or corroded, for example particularly in the region of the side port.
  • damage or corrosion could compromise the ability of the gas lift valve to prevent outflow of fluids from the production fluid and into the annulus, resulting in possible uncontrolled pressurisation of the annulus, leading to a well control failure.
  • the costs of such a workover program can be prohibitive, such that in many cases an operator may decide to abandon the well altogether.
  • Many other downhole components may include a form of side pocket mandrel
  • WO 2013/138896 discloses a cementing stage tool with a side pocket
  • a downhole chemical injection valve will typically include a side pocket for accommodating a chemical injection valve.
  • some downhole valves, such as a downhole tubing valve include a side pocket for accommodating a control valve which is used to operate the downhole valve.
  • An aspect of the present invention relates to a method for sealing a side pocket of a downhole mandrel in a tubing string, comprising:
  • the seal within the side pocket achieved by the sealing insert may function to substantially prevent any fluid communication outwardly or inwardly of the downhole mandrel via said side pocket. Such an arrangement may be used to prevent undesired fluid transfer between the downhole mandrel and surrounding environment.
  • the sealing insert may be used to address any damage to one or both of the mandrel side pocket and the cartridge component. Such damage may otherwise prevent the side pocket and/or cartridge component from providing a necessary fluid control when said cartridge component is in place.
  • damage to one or both of the side pocket and cartridge component may define or create a leak path which may establish uncontrolled fluid communication to/from the downhole mandrel.
  • the method may comprise sealing a side pocket of a downhole mandrel which has become damaged, for example by corrosion, by other wellbore operations or the like. In such an arrangement the sealing insert may function to seal any regions of damage, such as corroded regions, within the side pocket of the mandrel. This may therefore prevent such damaged regions providing or continuing to provide any potential leak paths.
  • the ability to address any damage to the downhole mandrel in accordance with the present invention may provide significant advantages in that any requirement to retrieve the entire downhole mandrel, and the associated tubing string, may be prevented.
  • the present invention has application in addressing situations where the downhole mandrel has become damaged, the method may nevertheless be used in other occasions, such as when an operator may wish to disable an existing and normally functioning downhole mandrel.
  • the downhole mandrel may comprise a side port which communicates with the side pocket.
  • the cartridge component during normal use and prior to being retrieved, may be configured to cooperate with the side pocket of the downhole mandrel to control fluid communication through the side port.
  • the sealing insert may function to seal said side port, and thus prevent any subsequent communication with the side pocket and the tubing string associated with the downhole mandrel.
  • the method may comprise sealing a side pocket which has become damaged in the region proximate or adjacent to the side port.
  • the side port of the downhole mandrel may be arranged to communicate with an annulus surrounding the downhole mandrel.
  • an annulus may be defined between the mandrel and a bore wall, such as a wall of a casing string, liner string, open hole or the like.
  • the sealing insert may function to substantially prevent any fluid communication between the annulus and the downhole mandrel.
  • the side port of the downhole mandrel may be arranged to communicate with a fluid conduit, such as an injection conduit or line which may extend from the downhole mandrel to surface level.
  • a fluid conduit such as an injection conduit or line which may extend from the downhole mandrel to surface level.
  • the sealing insert may function to substantially prevent any fluid communication between the fluid conduit and the downhole mandrel.
  • the sealing element may extend along a desired length of the side pocket to established sealing therein.
  • the sealing element may extend along a sufficient length to span the side port.
  • the sealing element may extend along a sufficient length to span damaged or corroded areas within the side pocket.
  • the downhole mandrel may comprise any downhole mandrel comprising a side pocket.
  • the cartridge may comprise any cartridge which may be utilised within the side pocket of any downhole mandrel
  • the downhole mandrel may comprise or define a gas lift mandrel.
  • the cartridge component may comprise or define a gas lift valve.
  • the downhole mandrel may comprise or define a chemical injection mandrel.
  • the cartridge component may comprise or define a chemical injection valve.
  • the downhole mandrel may comprise or define a downhole valve mandrel, such as a tubing safety valve mandrel, downhole safety valve mandrel or the like.
  • the cartridge component may comprise or define a control cartridge for use in providing control to the associated downhole valve.
  • the cartridge component may comprise or define a control valve.
  • the sealing insert may be of the same general geometrical form as the cartridge component being retrieved. Such an arrangement may permit the sealing insert to be readily received within the side pocket of the downhole mandrel.
  • the downhole mandrel may be connected in-line with the tubing string.
  • the downhole mandrel may comprise connectors, such as threaded connectors, at opposing ends to facilitate in-line connection with the tubing string.
  • the tubing string may define a production tubing string.
  • the tubing string may be arranged for the production of fluids from a subterranean reservoir.
  • the tubing string may be arranged for the production of a gas from a subterranean reservoir.
  • the tubing string may be arranged for the production of liquids, such as oil, from a subterranean reservoir.
  • the tubing string may define an injection tubing string.
  • the tubing string may be arranged for the injection of fluids, such as a liquid (e.g., water) or gas into a subterranean reservoir.
  • the method may comprise retrieving the cartridge component through the tubing string.
  • the method may comprise retrieving the cartridge component to surface.
  • the method may comprise retrieving the cartridge component via a conveyance arrangement.
  • the conveyance arrangement may comprise an elongate line, such as wireline, slickline or the like.
  • the conveyance arrangement may comprise coiled tubing.
  • the method may comprise establishing a connection between the conveyance arrangement and the cartridge component.
  • the method may comprise releasing the cartridge component from the side pocket, for example by disabling a latch mechanism, overcoming an interference force or the like.
  • the method may comprise deploying the sealing insert through the tubing string.
  • the method may comprise deploying the sealing insert from surface.
  • the method may comprise deploying the sealing insert via a conveyance arrangement.
  • the conveyance arrangement may be the same or similar to the conveyance arrangement used to retrieve the cartridge component.
  • the conveyance arrangement may comprise an elongate line, such as wireline, slickline or the like.
  • the conveyance arrangement may comprise coiled tubing.
  • the method may comprise releasing a connection between the conveyance arrangement and the sealing insert when said sealing insert is located within the side pocket of the mandrel.
  • the method may comprise securing the sealing insert within the side pocket of the downhole mandrel.
  • the method may comprise mechanically latching the sealing insert within the side pocket of the mandrel.
  • the method may comprise securing the sealing insert within the side pocket of the mandrel via the swelling element after sealing has been established.
  • the sealing element may provide an interference force within the side pocket of the mandrel.
  • the method may comprise preventing or restricting flow along the tubing string prior to retrieving the cartridge component.
  • the method may comprise ceasing production or injection along the tubing string. This may be achieved via well control equipment, such as a production or injection tree, sub surface valve, well kill fluid or the like, or any suitable combination.
  • the method may comprise setting a barrier downhole of the mandrel.
  • the method may comprise setting a barrier within the tubing string downhole of the mandrel.
  • a barrier may be set by closing a valve within the tubing string.
  • the barrier may be set by installing a plug within the tubing string.
  • the plug may be deployed on a conveyance arrangement, such as on wireline, slickline, coiled tubing or the like.
  • the method may comprise removing the barrier set within the tubing string, for example after the sealing insert has established a seal within the side pocket of the mandrel. Such an arrangement may permit subsequent production and/or injection operations to be achieved using the tubing string which now incorporates a sealed mandrel.
  • the method may comprise flowing or placing a fluid into the tubing string.
  • a fluid may be placed above a barrier set within the tubing string.
  • Such a fluid may be placed in the tubing string before or after the sealing insert is located within the side pocket of the mandrel.
  • a fluid placed within the tubing string may be utilised to establish a desired hydrostatic pressure therein.
  • Such hydrostatic pressure may be used to contain well pressure.
  • Such an arrangement may have particular application where the tubing string has previously been used to produce a gas from or inject gas into a subterranean formation.
  • a fluid placed within the tubing string may be utilised to provide a desired swelling activator for the swellable sealing element.
  • the method may comprise setting a barrier within an annulus surrounding at least a portion of the tubing. Such an annulus barrier may be set via one or more packers or the like. The method may comprise subsequently removing the barrier from the annulus, for example after the sealing insert has provided a seal within the side pocket of the mandrel.
  • the method may comprise flowing or placing a fluid into the annulus. Such a fluid may be placed above a barrier set within the annulus.
  • a fluid placed within the annulus may be utilised to establish a desired hydrostatic pressure therein.
  • Such hydrostatic pressure may be used to provide a degree of pressure control within the annulus.
  • a fluid placed within the annulus may be utilised to provide a desired swelling activator for the swellable sealing element.
  • the sealing element may be generally annular in form.
  • the sealing element may be formed of or comprise a swellable material, such as a swellable elastomer material.
  • the sealing element may be configured to swell when exposed to a swelling activator.
  • the sealing element may be configured to swell when exposed to water.
  • the sealing element may be configured to swell when exposed to a hydrocarbon fluid, such as hydrocarbon gas, oil or the like.
  • the sealing element may be configured to swell when exposed to different swelling activators.
  • the sealing insert may be composed of or comprise different swellable materials.
  • the sealing element may be configured to provide a sufficient delayed activation period upon exposure to a swelling activator. This may allow sufficient time for an operator to deploy the sealing insert in position within the side pocket of a gas lift mandrel without interference by premature swelling.
  • the sealing insert may comprise a base member upon which the sealing element is mounted.
  • the sealing element may be bonded to the base member.
  • the sealing element may be formed as or on a sleeve which may be mounted over the base member.
  • the base member may be elongate.
  • the base member may be generally cylindrical in form, for example the base member may be provided in the form of a rod.
  • the base member may comprise a metal or metal alloy material.
  • the base member may be substantially solid.
  • the base member may comprise at least one annular recess, wherein the sealing element is received within said annular recess.
  • the sealing element When the sealing element is received within the recess and in an unswollen state, the sealing element may define an outer diameter which is less than or equal to the outer diameter of the base member. Such an arrangement may assist with easier deployment of the sealing insert.
  • a single annular recess is provided within the base member. Such a single annular recess may accommodate one or more sealing elements.
  • the base member may define multiple annular recesses, axially separated from each other, wherein each annular recess accommodates at least one sealing element.
  • the base member may comprise or define a connection region, to facilitate connection with a conveyance arrangement.
  • the base member may comprise a generally conical nose portion. Such an arrangement may assist with deployment and insertion of the sealing element into the side pocket of the mandrel.
  • the base member may comprise a unitary component.
  • a further aspect of the present invention relates to a sealing insert for use in performing the method of any other aspect.
  • a further aspect of the present invention relates to a sealing insert for use in sealing a side pocket of a downhole mandrel, comprising:
  • a swellable sealing element mounted on the outer surface of the base member and configured to swell when exposed to an activator
  • sealing insert is geometrically configured to permit insertion within a side pocket of a downhole mandrel such that when the sealing element is swollen said sealing element provides a seal within said side pocket.
  • the sealing insert may comprise a connector portion to permit connection to a conveyance arrangement.
  • a conveyance arrangement may be used to deploy the sealing arrangement downhole and into a side pocket of a mandrel.
  • the conveyance arrangement may comprise wireline, slickline, coiled tubing or the like.
  • the base member may define a connector portion to permit connection to the conveyance arrangement.
  • the sealing element may be generally annular in form.
  • the sealing element may be formed or comprise a swellable material, such as a swellable elastomer material.
  • the sealing element may be configured to swell when exposed to a swelling activator.
  • the sealing element may be configured to swell when exposed to water.
  • the sealing element may be configured to swell when exposed to a hydrocarbon fluid, such as hydrocarbon gas, oil or the like.
  • the sealing element may be configured to swell when exposed to different swelling activators.
  • the sealing insert may be composed of or comprise different swellable materials.
  • the sealing element may be configured to provide a sufficient delayed activation period upon exposure to a swelling activator. This may allow sufficient time for an operator to deploy the sealing insert in position within the side pocket of a gas lift mandrel without interference by premature swelling.
  • the sealing element may be bonded to the base member.
  • the sealing element may be formed as or on a sleeve which may be mounted over the base member.
  • the base member may be elongate.
  • the base member may be generally cylindrical in form, for example the base member may be provided in the form of a rod.
  • the base member may comprise a metal or metal alloy material.
  • the base member may be substantially solid.
  • the base member may comprise at least one annular recess, wherein the sealing element is received within said annular recess. When the sealing element is received within the recess and in an unswollen state, the sealing element may define an outer diameter which is less than or equal to the outer diameter of the base member. Such an arrangement may assist with easier deployment of the sealing insert.
  • a single annular recess may be provided within the base member. Such a single annular recess may accommodate one or more sealing elements.
  • the base member may define multiple annular recesses, axially separated from each other, wherein each annular recess accommodates at least one sealing element.
  • the base member may comprise a generally conical nose portion. Such an arrangement may assist with deployment and insertion of the sealing element into the side pocket of the mandrel.
  • the base member may comprise a unitary component.
  • Another aspect of the present invention relates to a sealing insert for sealing a side pocket of a downhole mandrel, the sealing insert comprising:
  • a core and a swellable material positioned on the periphery of the core; and an upper sub connected to the core and having a conveyance connector for allowing connection to a conveyance running tool.
  • a further aspect of the present invention relates to a sealed downhole mandrel, comprising:
  • a side pocket including a side port
  • sealing insert sealingly mounted within the side pocket, wherein the sealing insert includes a swollen sealing element which extends at least over the side port of the side pocket.
  • a further aspect of the present invention relates to a method for sealing a side pocket of a downhole mandrel in a tubing string, comprising:
  • sealing insert into the side pocket of the downhole mandrel, wherein the sealing insert comprises a swellable sealing element on an outer surface thereof;
  • Another aspect of the present invention relates to a method for performing a downhole intervention, comprising: retrieving a cartridge from a side pocket of a downhole mandrel, wherein the retrieved cartridge comprises at least one seal arrangement for providing a seal between the cartridge and the side pocket of the mandrel when located therein;
  • the new cartridge once in place, may perform substantially the same function as the retrieved cartridge prior to retrieval.
  • the presence of at least one swellable seal element on the new cartridge may assist to address any loss of sealing integrity suffered by the retrieved cartridge when originally in place.
  • the method may comprise replacing the at least one seal arrangement of the retrieved cartridge with at least one swellable seal element, and then deploying the retrieved cartridge as the new cartridge.
  • the retrieved cartridge may be reused.
  • the method may comprise deploying a new cartridge which is different from the retrieved cartridge.
  • the retrieved cartridge may comprise at least one non-swelling seal arrangement.
  • the retrieved cartridge may comprise at least one chevron seal arrangement.
  • a further aspect of the present invention relates to a downhole side pocket cartridge for installing within a side pocket of a downhole mandrel, comprising at least one swellable sealing arrangement mounted on an outer surface thereof for establishing sealing engagement within a side pocket of a downhole mandrel.
  • Figure 1 is a diagrammatic illustration of a portion of a wellbore which includes a conventional gas lift mandrel during normal operation;
  • Figure 2 is a diagrammatic illustration of the gas lift mandrel of Figure 1 following loss in sealing integrity;
  • Figures 3, 4 and 6 to 8 illustrate sequential stages of a method according to an embodiment of the present invention for sealing the gas lift mandrel of Figure 1 ;
  • Figure 5 is a longitudinal cross sectional view of a sealing insert in accordance with an embodiment of the present invention for use in a method for sealing the gas lift mandrel of Figure 1 ;
  • FIGS. 9 and 10 diagrammatically illustrate sequences in a method according to an alternative embodiment of the present invention.
  • a wellbore system is shown in Figure 1 , wherein said wellbore system 10 is provided to support the production of a gas from a subterranean reservoir (not shown).
  • the wellbore system 10 includes a drilled bore 12 within which is located a casing string 14, wherein the casing string 14 may be cemented or packed-off within the drilled bore 12.
  • a production tubing string 16 extends through the casing string 14 to intercept a gas production zone (not shown) of the subterranean reservoir, wherein the production tubing 16 defines an annulus 17 with the casing string 14.
  • a gas lift mandrel 18 is installed in-line with the production tubing 16, via threaded end connectors 20, 22.
  • the gas lift mandrel 18 includes a primary bore section 24 which is aligned with the fluid communication path along the production tubing 16, and a side pocket 26 laterally off-set from the primary bore section 24.
  • the side pocket may define an internal diameter of, for example, around 20 to 40mm.
  • the side pocket mandrel may define an internal diameter of, for example, 25.4 mm (1 ").
  • the side pocket mandrel may define an internal diameter of, for example, 38.1 mm (1.5").
  • the primary bore section 24 and side pocket 26 are in fluid communication with each other.
  • a side port 28 is formed in the side wall of the mandrel 18 and provides fluid communication between the side pocket 26 and the annulus 17.
  • a gas lift valve cartridge 30 is mounted within the mandrel side pocket 26, and includes upper and lower seals 32, 34, such as chevron seals, positioned on either side of the port 28.
  • the seals 32, 34 provide sealing between the valve cartridge 20 and the side walls of the side pocket 26.
  • the valve cartridge 30 functions to control fluid communication between the production tubing 16 and the annulus 17 via the port 28.
  • an operator will inject gas 38 at high pressure into the annulus 17 from surface.
  • the gas lift valve cartridge 30 will open and permit inflow of the injected gas 38 into the gas lift mandrel 18.
  • the injected gas 38 will intimately mix with the gas 40 being produced from the subterranean reservoir, with the resulting gas mixture 42 having a lower density than the produced gas 40, allowing the reservoir pressure to then drive the gas upwardly through the production tubing string 16 to surface.
  • An operator may continuously inject gas 38, or may provide intermittent injection.
  • the gas lift valve 30 will function as a one way valve, such that outflow of gas from the gas lift mandrel 18 into the annulus 17 should normally be prevented.
  • the fault may lie with the gas lift valve cartridge 30. In such cases it might be possible to perform a wireline based intervention operation to retrieve and replace the valve cartridge 30.
  • the options to the operator were heretofore either to perform a complete workover to pull and replace the entire production string 16, or abandon the wellbore 10, which will be understood by those of skill in the art to both be undesirable.
  • the present invention provides a heretofore unknown alternative to an operator, which will allow the wellbore to continue to operate.
  • an operator may utilise an embodiment of the present invention, as will now be described, initially with reference to Figure 3.
  • An operator will initially set a plug 50 within the tubing string 16 below the gas lift mandrel 18, for example using a wireline deployed plug.
  • the valve cartridge 30 is picked up by wireline 52, for example via a suitable connector and running tool (not shown), and retrieved from the side pocket 26 of the mandrel 18 and towards surface.
  • a sealing insert 60 according to an embodiment of the present invention is deployed from surface through the production tubing 16.
  • the production tubing 16 above the plug 50, and the annulus 17, are filled with a fluid 54, in this example water.
  • a fluid 54 in this example water.
  • this water may be placed into the wellbore 10 immediately following setting of the plug, and before the valve cartridge 30 is removed.
  • the water provides a column of fluid which establishes a hydrostatic pressure within the wellbore to assist in containing the lower wellbore and reservoir pressure.
  • the water will also function to operate the sealing insert 60, as will be described in more detail below.
  • the insert 60 includes a cylindrical solid base member 62 which has a conical tip 64 at one end and a connection profile 66 at an opposite end.
  • the connection profile 66 facilitates connection to the wireline 52 via an appropriate connector 68 and running tool 70 (all shown in broken outline).
  • the insert 60 further comprises an annular sealing element 72 which is mounted within an annular recess 74 formed in the base member 62.
  • the sealing element comprises a swellable elastomer material which in the present exemplary embodiment is caused to swell upon exposure to water.
  • the outer diameter of said sealing insert may be less than or equal to the largest outer diameter of the base member.
  • the sealing insert 60 is deployed into the side pocket 26 of the mandrel 18, as illustrated in Figure 6, with the wireline detached and retrieved to surface. Over time, exposure to the water 54 within the production tubing 16 and annulus 17 will cause the sealing element 72 of the sealing insert 60 to swell thus sealing the side pocket 26 of the mandrel 18, as illustrated in Figure 7. As illustrated, the sealing element is of sufficient length to span the side port 28 in the mandrel 18. Further, the nature of the swelling material of the sealing element is such that it can readily comply with the surfaces of the side pocket 26, and will therefore also seal-off any damaged or highly corroded areas. Further, any further corrosion or damage may be accommodated by the continuous swelling, or self-healing, effect of the swelling material.
  • the plug 50 may be removed, as shown in Figure 8.
  • the wellbore 10 may then recommence production, or alternatively could now be used as an injection well.
  • an operator may recognise that a fault has occurred at the location of a gas lift mandrel 18, as illustrated in Figure 2.
  • an operator wishes to retain the operation of the particular gas lift mandrel.
  • Embodiments of an aspect of the present invention may permit an operator to address the fault at the mandrel 18, while still maintaining its functionality. Such an exemplary embodiment will now be described with additional reference to Figures 9 and 10.
  • an operator may retrieve the gas lift valve cartridge 30 on wireline 52, in the same manner as shown in Figure 3.
  • the operator can, according to the present invention, deploy a new gas lift valve cartridge 30a, as illustrated in Figure 9, again on wireline 52.
  • the new valve cartridge 30a comprises upper and lower swellable seals 34a, 36a at the locations previously occupied by the chevron seals 34, 36 of the retrieved cartridge 30.
  • the retrieved cartridge may be reconditioned to remove the existing seals 34, 36 and replace these with new, swellable seals 34a, 36a.
  • a different cartridge may be utilised.
  • the seals 34a, 36a may be activated to swell, thus providing sealing engagement between the new cartridge 30a and the side pocket mandrel, as illustrated in Figure 10.
  • the use of the swelling seals 34a, 36a in this case may address any previous issues with losses in seal integrity with the retrieved cartridge 30, and may allow fluid control via the side port 28 of the mandrel 18 to be retained.
  • the wellbore 10 supports gas production.
  • oil production may be present, or alternatively downhole injection may be present.
  • the sealing element of the sealing insert in the illustrated embodiments is provided to swell upon exposure to water.
  • the sealing element may be arranged to swell when exposed to oil.
  • a single mandrel is shown within a tubing string.
  • multiple mandrels may be present, axially distributed along the tubing string.
  • more than one mandrel may require remedial attention, such as described above.
  • operational mandrels may support continued gas lift production, after one or more other mandrels have been sealed.
  • mandrel is a gas lift mandrel.
  • embodiments of the present invention may be used in combination with any downhole mandrel, such as a chemical injection mandrel, downhole valve mandrel or the like.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Earth Drilling (AREA)
  • Coating Apparatus (AREA)

Abstract

L'invention concerne un procédé destiné à sceller une poche latérale de mandrin de fond de trou dans une colonne d'extraction. Ce procédé consiste à récupérer un composant cartouche de la poche latérale du mandrin, puis à déployer une garniture d'étanchéité dans ladite poche, la garniture d'étanchéité comprenant un élément d'étanchéité dilatable sur sa surface externe. L'élément d'étanchéité dilatable se dilate pour former un joint à l'intérieur de la poche latérale. L'invention concerne également une garniture d'étanchéité destinée à sceller une poche latérale de mandrin de fond de trou. Ladite garniture comprend un élément de base et un élément d'étanchéité dilatable monté sur la surface externe de l'élément de base et configuré pour se dilater lorsqu'il est exposé à un activateur. La garniture d'étanchéité selon l'invention est dotée d'une configuration géométrique permettant son insertion dans une poche latérale de mandrin de fond de trou, de sorte que, lorsque l'élément d'étanchéité est dilaté, il forme un joint à l'intérieur de la poche latérale.
PCT/EP2014/066294 2013-09-30 2014-07-29 Garniture d'étanchéité et procédé associé WO2015043801A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2014327755A AU2014327755A1 (en) 2013-09-30 2014-07-29 Sealing insert and method
US14/909,512 US20160208569A1 (en) 2013-09-30 2014-07-29 Sealing insert and method
EP14746997.7A EP3052744A2 (fr) 2013-09-30 2014-07-29 Garniture d'étanchéité et procédé associé
CA2923107A CA2923107A1 (fr) 2013-09-30 2014-07-29 Garniture d'etancheite et procede associe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1317280.4A GB2518683B (en) 2013-09-30 2013-09-30 Sealing Insert and method
GB1317280.4 2013-09-30

Publications (2)

Publication Number Publication Date
WO2015043801A2 true WO2015043801A2 (fr) 2015-04-02
WO2015043801A3 WO2015043801A3 (fr) 2015-05-28

Family

ID=49585057

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/066294 WO2015043801A2 (fr) 2013-09-30 2014-07-29 Garniture d'étanchéité et procédé associé

Country Status (6)

Country Link
US (1) US20160208569A1 (fr)
EP (1) EP3052744A2 (fr)
AU (1) AU2014327755A1 (fr)
CA (1) CA2923107A1 (fr)
GB (1) GB2518683B (fr)
WO (1) WO2015043801A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108086939B (zh) * 2017-12-11 2020-09-01 中国海洋石油集团有限公司 斜三通旁通堵塞器
GB2590319B (en) * 2018-07-16 2022-07-20 Aarbakke Innovation As Method and apparatus for sealing a side pocket mandrel
CA3143238A1 (fr) * 2019-08-06 2021-02-11 Halliburton Energy Services, Inc. Bouchon de mandrin d'extraction au gaz metallique expansible
GB2611688B (en) * 2020-08-13 2024-06-26 Halliburton Energy Services Inc A valve including an expandable metal seal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050061369A1 (en) * 2003-04-15 2005-03-24 De Almeida Alcino Resende Mandrel for a gas lift valve
US20090250227A1 (en) * 2008-04-02 2009-10-08 Halliburton Energy Services, Inc. A System And Method For Plugging A Side Pocket Mandrel Using A Swelling Plug
US20100122819A1 (en) * 2008-11-17 2010-05-20 Baker Hughes Incorporated Inserts with Swellable Elastomer Seals for Side Pocket Mandrels
WO2013138896A1 (fr) * 2012-03-22 2013-09-26 Packers Plus Energy Services Inc. Outil étagé pour cimentation de puits de forage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050061369A1 (en) * 2003-04-15 2005-03-24 De Almeida Alcino Resende Mandrel for a gas lift valve
US20090250227A1 (en) * 2008-04-02 2009-10-08 Halliburton Energy Services, Inc. A System And Method For Plugging A Side Pocket Mandrel Using A Swelling Plug
US20100122819A1 (en) * 2008-11-17 2010-05-20 Baker Hughes Incorporated Inserts with Swellable Elastomer Seals for Side Pocket Mandrels
WO2013138896A1 (fr) * 2012-03-22 2013-09-26 Packers Plus Energy Services Inc. Outil étagé pour cimentation de puits de forage

Also Published As

Publication number Publication date
EP3052744A2 (fr) 2016-08-10
WO2015043801A3 (fr) 2015-05-28
AU2014327755A1 (en) 2016-02-18
GB201317280D0 (en) 2013-11-13
CA2923107A1 (fr) 2015-04-02
US20160208569A1 (en) 2016-07-21
GB2518683A (en) 2015-04-01
GB2518683B (en) 2016-08-10

Similar Documents

Publication Publication Date Title
AU2013340898B2 (en) Barrier testing method
CA2613757C (fr) Trousse d'adaptateur de bouchon de puits de forage
CA2309513C (fr) Mecanisme hydraulique de pose de la suspension de la colonne perdue et son mode d'emploi
CA2712069C (fr) Appareil, ensemble et procede pour injecter un fluide dans un puits souterrain
US7721805B2 (en) Method and apparatus to hydraulically bypass a well tool
US8037938B2 (en) Selective completion system for downhole control and data acquisition
US8561687B2 (en) Pressure containment devices and methods of using same
RU2686746C1 (ru) Система для повторной изоляции доступа в ствол скважины
CA2657546C (fr) Systeme et procede applicables a la transmission selective de raccords hydrauliques droits
US10184321B2 (en) Mitigating leaks in production tubulars
US10253607B2 (en) Method for treating and producing from a subterranean region
US20160208569A1 (en) Sealing insert and method
NO342075B1 (no) Forbikoplingsenhet og fremgangsmåte for innsprøytning av fluid rundt et brønnverktøy

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14746997

Country of ref document: EP

Kind code of ref document: A2

REEP Request for entry into the european phase

Ref document number: 2014746997

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2014746997

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 14909512

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2014327755

Country of ref document: AU

Date of ref document: 20140729

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2923107

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE