US20070089886A1 - Expandable Sleeve - Google Patents

Expandable Sleeve Download PDF

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Publication number
US20070089886A1
US20070089886A1 US11/380,086 US38008606A US2007089886A1 US 20070089886 A1 US20070089886 A1 US 20070089886A1 US 38008606 A US38008606 A US 38008606A US 2007089886 A1 US2007089886 A1 US 2007089886A1
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US
United States
Prior art keywords
sleeve
well
tubular body
sleeves
spring
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.)
Abandoned
Application number
US11/380,086
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English (en)
Inventor
Jacques Orban
Claude Vercaemer
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.)
Schlumberger Technology Corp
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Schlumberger Technology Corp
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
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Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION reassignment SCHLUMBERGER TECHNOLOGY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VERCAEMER, CLAUDE, ORBAN, JACQUES
Publication of US20070089886A1 publication Critical patent/US20070089886A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—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
    • E21B43/108—Expandable screens or perforated liners
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/10—Reconditioning of well casings, e.g. straightening
    • 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
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • 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

Definitions

  • This invention relates to an expandable sleeve of the type that are generally used for lining oil or gas wells.
  • Expandable sleeves have been known for some time in the oil and gas industry as a technique for lining and stablising wells for the production of fluids.
  • the sleeve is introduced into the well in a contracted form and then expanded until it contacts the wall of the well bore. Expansion can be achieved by a number of means, including inflation with compressed fluid or cold working with a mandrel or rotating expansion tool.
  • the advantages of expandable sleeves are well known. In cased wells, expandables can be used to shut off perforations or close other holes in the casing. In open hole, expandables can be used to stablilise the well.
  • Expandables have also been used to shut off perforations in steam injection wells as is discussed in US 2003015246 A.
  • One approach to sealing off perforations described in this document is the use of a sealing sleeve comprising a cylindrical steel portion with rubber-like gasket material bonded on the outer surface of the steel sleeve. Certain problems are identified with such a construction.
  • Another approach to sealing such perforations that is stated as addressing these problems is the use of a spirally would metal patch. Upon deployment, the patch unwinds within the wellbore and seals the perforation in the casing wall. Spring tension tends to keep the patch securely fixed over the perforation.
  • the expandable consists of a steel tube that is expanded
  • the steel undergoes plastic deformation in order to provide the increase in diameter required.
  • the steel retains some elasticity and so may relax following removal of the mandrel or expanding tool after expansion. This relaxation may be sufficient to compromise the seal against the perforations or wellbore.
  • the present invention aims to mitigate the effect of such relaxation.
  • a first aspect of the invention comprises an expandable sleeve for use in a well, comprising a tubular structure including:
  • the internal spring structure comprises a healically wound spring.
  • the spring comprises a helically would wire of rectangular section.
  • the spring can be provided with formations that resist compression, for example, inter-engaging teeth formed on adjacent edges of the spring windings.
  • the tubular body is typically formed from solid metal such as steel.
  • the tubular body can have a corrugated structure prior to expansion.
  • the external sealing layer is preferably natural or synthetic rubber.
  • a second aspect of the invention comprises a method of installing an expandable sleeve according to the first aspect of the invention in a well, comprising:
  • the internal spring is installed in the tubular body in a compressed state prior to lowering the sleeve into the well.
  • Another embodiment comprises lowering the tubular body into the well and lowering the spring into the tubular body after it has been lowered into the well.
  • the spring can be lowered into the tubular body after the tubular body has been expanded.
  • the spring By providing the internal spring structure, the tendency of the tubular body to relax is resisted. Also, the spring can provide mechanical support allowing potentially thinner material to be used.
  • the invention also comprises a method of completing a well, comprising installing a completion string including at least one sleeve according to the invention in the well.
  • the completion string comprises an array of slotted liners having sleeves dispersed at various locations along the array.
  • the sleeves are expanded on installation of the completion. In another embodiment, one or more of the sleeves is expanded after installation to allow production management operations to be performed in the region between the expanded sleeves.
  • At least one further sleeve can be installed between adjacent expanded sleeves in the completion string to isolate that region.
  • Sleeves according to the invention can also be used during drilling operations to stablise the formation being drilled.
  • FIG. 1 shows a horizontal section through a sleeve according to an embodiment of the invention in a well
  • FIG. 2 shows a part vertical section of the sleeve of FIG. 1 ;
  • FIG. 3 shows a part exploded view of the sleeve of FIGS. 1 and 2 ;
  • FIG. 4 shows a horizontal section through a corrugated sleeve according to a further embodiment of the invention
  • FIG. 5 shows a sleeve with axial reinforcement
  • FIG. 6 shows a wireline conveyed expansion tool for use with sleeves according to the invention
  • FIG. 7 shows a well completion using expandable sleeves according to an embodiment of the invention
  • FIG. 8 shows the use of an expandable sleeve according to an embodiment of the invention to isolate a water producing region of a completion as shown in FIG. 6 ;
  • FIG. 9 shows a well completion with length compensation sections.
  • Expandable sleeves in accordance with the invention are particularly useful in wells such as oil and gas wells. They can be applied during the well construction process to stabilise the formation through which the well is drilled, or after completion to repair damage or to seal off perforations that are producing unwanted fluids. Other uses will be apparent.
  • the embodiment of the invention shown comprises a sleeve constructed in three layers; an outside layer 10 , and intermediate layer 12 and an internal layer 14 .
  • the sleeve is installed in a well that has been completed with a steel casing 16 secured in the well by cement 17 to provide zonal isolation and physical support. Communication with the producing formation 19 is via perforations 18 formed through the casing in the usual manner.
  • the outside layer 10 comprises a thin layer of a sealing compound such as natural or synthetic rubber.
  • a sealing compound such as natural or synthetic rubber.
  • the exact material will be selected according to the physical and chemical environment to which the sleeve will be selected.
  • the principal function of this layer is to provide a seal between the sleeve and the wall outside.
  • the outside layer 10 is pressed against the borehole wall (either open formation or previously installed tubular such as a cassing 16 ) by the other layers of the sleeve.
  • the intermediate layer 12 is a thin solid layer. It is typically could be made of metal such as steel of from 1 to 3 mm thickness (larger thicknesses may be used according to requirements).
  • the intermediate layer 12 ensures proper uniform compression of the outside rubber layer 10 against the external wall of the well or casing 16 .
  • the thickness of the intermediate layer 12 is a compromise between the need to for it to deform easily during the expansion operation, while still being able to support the internal well over-pressure, without being extruded into holes in the well wall or tubular 16 such as perforation 18 or slots.
  • the internal layer 14 is a spring device 20 that provides elastic expansion of the sleeve against the well wall after the expanding tool (not shown) has finished the expansion process. Furthermore, this structure resists potential collapse of the intermediate layer 12 when an external pressure is being applied onto the sleeve system.
  • the primary seal is provided by the rubber outside layer 10 which is pressed against the perforated tubular 16 by the expansion force of the thin intermediate metal layer 12 reinforced by the radial force generated by the energizer spring 20 .
  • the energizer spring 20 can be an helical spring made of an wound thick wire of a rectangular section.
  • the rectangular wire section allows a smooth contact between the outer surface 22 of the spring 20 and the intermediate thin metal layer 12 .
  • This spring 20 is used to generate a radial expansion to push the sleeve against the well wall.
  • One method of constructing a spring for this application is to start for a tube of an elastic metal. This tube should be slightly too large to enter in the well (especially if the thicknesses of the rubber outer layer 10 and thin metal intermediate layer 12 are taken into account). The metal tube is then cut following a spiral line to form the spring helix. To install the spring, it is necessary to reduce its diameter; for this action, an axial force is applied to stretch the hellicoidal structure (to separate the coils) then a torque is applied to reduce the helix diameter.
  • This spring 20 can have a number of functions when installed in the well in the sleeve.
  • the spring 20 can ensure that the intermediate metal layer 12 is maintained in a cylindrical shape after its plastic deformation in the expansion process. This can be particularly useful if the sleeve was initially vertically corrugated prior to expansion as is shown in FIG. 4 .
  • the spring 20 can also act to reinforce the sealing effect of the outer rubber layer 10 against the well wall (either open-hole well-bore or the perforated casing 16 , or the slotted liner, or any other metal tubular).
  • the extra energization may be useful because the intermediate metal layer 12 has been plastically deformed against the well-wall; when the mechanical force applied for this deformation (expansion) is removed, the intermediate metal layer 12 will relax slightly due to the elastic property of the metal.
  • the spring 20 will act to support the sleeve when external pressure from the formation is applied.
  • the relatively thin intermediate layer 12 would have tendency to collapse, as it is thin and typically not fully cylindrical after its plastic expansion against the well wall.
  • the spring 20 When installed in the well, the spring 20 can provide a reserve of potential energy, so that the sealing effect of the out rubber layer 10 can be maintained and re-adjusted in case of slight movement either of the sleeve or the wall. Such movement may occur due to thermal and pressure variation, or due to some slight displacement of the structure relative to the wall. Such movement can occur in open-hole situations, as the wall itself may move due to change in fluid wetting or subsidence effects.
  • the spring 20 is designed for a locking effect after installation. This effect can be achieved by friction between the spring 20 and the inner wall of the intermediate layer 12 , or by a ratchet effect created by the structure of the edges of the coils of the spring 20 .
  • the helicoidal cut used to make the spring can be in the form of a toothed line so that the teeth on adjacent parts of the coils interact and lock the spring in place.
  • the locking effect is preferably directional, so that the spring can expand but retraction is resisted by the interlocking formations.
  • the spring may be installed in the sleeve in a number of ways.
  • the spring may be lowered into the well directly with the intermediate and outer layers as a single unit, with the spring in its compressed state.
  • Such an approach can apply particularly when the sleeve expansion ratio is limited.
  • it may be easier to install the spring after the intermediate and outer layers have been installed and expanded.
  • the expandable structure may be installed and expanded in a first run of a setting tool and the spring installed after expansion by a second run of a setting tool.
  • the basic sleeve according to one embodiment of the invention includes a intermediate thin layer 12 .
  • this is initially cylindrical. While this layer is usually metal, other materials capable of easy plastic deformation are also possible.
  • This layer will be plastically deformed to the final diameter, by a mechanical device which generates a radial expansion. Starting with a cylindrical intermediate layer, the expansion is limited typically to 20%-30%. Expansion is limited by the intrinsic properties of the material of the intermediate layer. For larger expansion ratios, the intermediate metal layer may need to be corrugated prior to installation as is shown in FIG. 4 .
  • the intermediate layer can be optimised for minimizing the force required for expansion.
  • One approach is to use a slightly corrugated sleeve with corrugations of relatively small depth and relatively but short in circumferential extent (small wavelength pattern) so that many corrugations can be formed over the circumference.
  • Such small but numerous corrugations allows extension of the sleeve under a relatively small force.
  • the maximum extension may be limited.
  • the use of a corrugated sleeve allows the energizer spring to act more freely to apply the sleeve against the wall. When the corrugations are axial, they may also provide some support over perforations, so that internal pressure does not extrude the thin intermediate layer into the perforations.
  • the small numerous corrugation sleeve may be replaced by a small numerous dimples sleeve.
  • the wavy pattern is available for all direction, so that the sleeve can comply to more type of deformation of the open-hole surface.
  • a sleeve according to the invention can be used in the role of an external casing packer (ECP) or a liner packer.
  • ECP external casing packer
  • the sleeve is installed as a special tubular between either screen sections or slotted liners, during the installation of the completion.
  • the sleeve is handled and installed as the other elements of the completion. Used in such an application, the sleeve will typically have certain characteristics, including:
  • the expandable sleeve according to the invention is more simple, as the control and setting mechanisms can be contained in a wireline setting tool. Compared to an ECP, the expandable sleeve has the advantage of not being susceptible to leaks in the packer element (which, when they appear in an ECP prohibit proper setting).
  • the expandable sleeve according to the invention contains its “reserve” of potential energy to adapt its seal when required due to small movement of the formation or the device itself. Such adaptation is not possible with a conventional ECP.
  • the sleeve is preferably initially cylindrical and expanded to final diameter by plastic deformation (typically less than 20%).
  • the intermediate layer preferably is able to support the weight of the completion while running in the hole.
  • a slotted liner sleeve may be added at the inside the intermediate layer and attached to both end of the expandable sleeve as is shown schematically in FIG. 5 .
  • the cuts in the slotted sleeve 23 are parallel to the axis of the tubular so that relatively high axial loads can be supported, while relatively little effort is required during radial expansion.
  • the spring may have to generate a relatively high radial force to deform the intermediate layer (as it may be relatively thick). Consequently, a thick hericoidal spring may have to be forced into place with a high axial load. Extreme axial loads can be achieved by hammering axially onto the spring in-situ.
  • the sleeve be expanded initially. Production may start without expansion. The expansion would be performed only when fluid management is required. This situation may be particularly preferable if the length of the sleeve is large compared to the total length of the completion; with the non-expanded situation, production may be provided in front of the none-expanded sleeve.
  • sleeves according to the invention are in the domain of through-tubing fluid shut-off.
  • the expansion of metal is typically less than 30% in the plastic domain, but for some applications, larger expansion may be required.
  • the sleeve may need to be lowered through the production tubing to enter the well, and then expanded to the casing. In this application, the required expansion may be up to three-fold.
  • a corrugated sleeve such as that shown in FIG. 4 may be used.
  • the intermediate layer may need to be relatively thin as large bending deformation is required.
  • the rubber outer layer may also be of variable thickness in the corrugated shape, so that it has a uniform thicknesses after expansion into a cylindrical shape. Typically, it is thinner at the tip of the corrugation, and thicker at the recess part of the corrugation.
  • This sleeve may have a retraction effect after setting, trying to move elastically to its initial shape (usually only by a small percentage of the deformation). To avoid this retraction, the inside layer provided, for example, by the energizer spring is required.
  • the length of the sleeve can be selected depending of the length of entry port (perforation, slots) to be sealed.
  • the water shut-off sleeve When installed over slotted liner or screens, the water shut-off sleeve should extend across a perforated/slotted section and reach the adjacent sections without perforations or slots. Furthermore, these adjacent sections need to seal in the outside annulus.
  • the sleeve For these and other applications, once the sleeve has been lowered to the proper depth in the well, it must be expanded.
  • a wireline expansion tool such as is shown in FIG. 6 . It is common that installation of expandable sleeves may have to take place in a well that is lined with a casing 16 and has production tubing 24 secured therein by means of a packer 26 . Consequently, the expansion tool 28 will be dimensioned to pass through production tubing.
  • the sleeve 30 preferably in corrugated form, is located on the expansion tool 28 and the two are positioned together in the well prior to expansion of the sleeve, after which the tool 28 is withdrawn.
  • the expansion tool ensures the cold forming of the sleeve to its final diameter, pressing the sleeve against the well wall.
  • Various expanding processes can be used:
  • the spring design may be adapted to this requirement:
  • expandable sleeves 30 are installed as completion tubulars between screens or slotted liners 32 , for example in a horizontal section of a well 34 . Multiples sleeves 30 can be installed in one completion string (possibly as many as 100 in a long horizontal well).
  • the completion typically also comprising the slotted liners 32 ) is installed at the desired depth.
  • An expansion tool is lowered to the end of the completion, and then pulled to the last sleeve (already in place with the completion) which needs expansion.
  • the expansion tool ensures all the expansion of all sleeves in one single run in the hole. After the expansion of all of the sleeves 32 , the contact with the reservoir is compartmented.
  • compartmentalisation it is possible to control water production by isolating any sections producing water, for example section 36 in FIG. 7 , while leaving the remaining sections 38 open to produce oil.
  • This isolation can be performed by installing another expandable sleeve for internal bore use as is shown schematically in FIG. 8 .
  • This sleeve 40 is sized to extend over the distance between two successive completion sleeves 30 to ensure isolation of the water producing section 36 .
  • Isolation of the water producing sections can be performed either at the beginning of the production phase (if the well passes through zones producing water and oil) or when the problem starts (for example when the oil water contact moves as the reservoir becomes depleted).
  • expansion of the sleeves 30 of the completion is not performed at the time the completion is installed. In this case the sleeves 30 are expanded only when water entry occurs.
  • a further modification of this approach is to only expand the sleeves 30 at both ends of the water-producing section 36 . This can give more flexibility for the operation, while ensuring maximum producing contact with the reservoir.
  • Another application for the invention can be for length compensation following expansion as is shown in FIG. 9 .
  • the expanded sleeve has a shorter length after expansion.
  • the sleeve typically shrinks in length at the same percentage as it has been expanded. For example, a 5 meter sleeve expanded by 10% in diameter could shrink in length by 0.5 meter.
  • the length compensation tubular section 42 can be made of circumferentially corrugated pipe (bellows shape). It can also be made of pipe with a spiral deformation (such as a thread). This shape allows axial deformation under load. Such a structure may be limited in axial load capability.
  • the length compensation tubular may need axial reinforcement to support the maximum weight of the completion. If present, any axial load member providing such reinforcement needs to be deactivated before starting the expansion of the neighbouring expandable sleeve, so that length compensation can be performed by the compensation sleeve.
  • the deactivation of the axial reinforcement members of the length compensation sleeve can be obtained at the beginning of the expansion process by cracking links radially, for example by local radial deformation of the reinforcement members. This can be achieved by the radial expansion device used to expand the sleeve. Alternatively, a latch system can be disengaged radially to free this axial reinforcement system.
  • an insulating sleeve according to the invention can be installed over the problematic zone and drilling may continue. To avoid loss of well diameter after the sleeve installation, it may be desirable to under-ream the well bore before the sleeve installation. The sleeve is then lowered with the expansion tool. The sleeve is expanded over the under-reamed section.

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  • 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)
  • Earth Drilling (AREA)
US11/380,086 2005-05-04 2006-04-25 Expandable Sleeve Abandoned US20070089886A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05290982.7 2005-05-04
EP05290982A EP1719873A1 (fr) 2005-05-04 2005-05-04 Manchon extensible

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US20070089886A1 true US20070089886A1 (en) 2007-04-26

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Cited By (9)

* Cited by examiner, † Cited by third party
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US20080289813A1 (en) * 2007-05-23 2008-11-27 Schlumberger Technology Corporation Polished bore receptacle
US20100126733A1 (en) * 2008-11-24 2010-05-27 Schlumberger Technology Corporation Packer
US20100175895A1 (en) * 2007-06-26 2010-07-15 Paul David Metcalfe Permeability Modification
US20100243274A1 (en) * 2007-12-21 2010-09-30 Guerrero Julio C Expandable structure for deployment in a well
US20130327526A1 (en) * 2011-11-28 2013-12-12 Otkrytoe aktsionernoe obschestvo 'Tatneft" im. V.D.Shashina Expandable sand screen and method for well casing for thermal oil recovery
US9169634B2 (en) 2007-12-21 2015-10-27 Schlumberger Technology Corporation System and methods for actuating reversibly expandable structures
US20180016864A1 (en) * 2015-04-23 2018-01-18 Baker Hughes, A Ge Company, Llc Borehole plug with spiral cut slip and integrated sealing element
CN114135245A (zh) * 2022-02-07 2022-03-04 江苏嘉胜石油科技有限公司 一种用于石油钻采的拼接式膨胀井壁装置
CN116291301A (zh) * 2023-03-27 2023-06-23 江苏腾龙石化机械有限公司 一种螺旋扩张式套管外封隔器

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US20080110643A1 (en) * 2006-11-09 2008-05-15 Baker Hughes Incorporated Large bore packer and methods of setting same
FR2915264B1 (fr) * 2007-04-20 2010-04-16 Saltel Ind Procede de chemisage d'un puits ou d'une canalisation au moyen d'une vessie gonflable.
FR2917117B1 (fr) * 2007-06-05 2010-12-24 Saltel Ind Procede de controle de la production de fluide a l'interieur d'un puits.
US8157007B2 (en) 2007-04-20 2012-04-17 Saltel Industries Method for casing using multiple expanded areas and using at least one inflatable bladder
EP2607619A1 (fr) * 2011-12-23 2013-06-26 Welltec A/S Ensemble tubulaire de fond de trou pour sceller une ouverture
US9617802B2 (en) 2013-09-12 2017-04-11 Saudi Arabian Oil Company Expandable tool having helical geometry
US10100600B2 (en) 2015-02-10 2018-10-16 Saudi Arabian Oil Company Expandable tools using segmented cylindrical sections
CN114451364B (zh) * 2022-01-10 2023-06-20 池州市金实自然资源管理服务有限公司 一种捕鱼装置

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US7234533B2 (en) * 2003-10-03 2007-06-26 Schlumberger Technology Corporation Well packer having an energized sealing element and associated method

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CA2306656C (fr) * 1999-04-26 2006-06-06 Shell Internationale Research Maatschappij B.V. Connexion extensible
US7036600B2 (en) * 2002-08-01 2006-05-02 Schlumberger Technology Corporation Technique for deploying expandables
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US3506233A (en) * 1968-02-16 1970-04-14 Consolidated Kinetics Corp Suspension type isolation mount
US4515213A (en) * 1983-02-09 1985-05-07 Memory Metals, Inc. Packing tool apparatus for sealing well bores
US20030155159A1 (en) * 2000-03-22 2003-08-21 Slack Maurice William Method and apparatus for handling tubular goods
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US7234533B2 (en) * 2003-10-03 2007-06-26 Schlumberger Technology Corporation Well packer having an energized sealing element and associated method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7992642B2 (en) 2007-05-23 2011-08-09 Schlumberger Technology Corporation Polished bore receptacle
US20080289813A1 (en) * 2007-05-23 2008-11-27 Schlumberger Technology Corporation Polished bore receptacle
US8555985B2 (en) 2007-06-26 2013-10-15 Paul David Metcalfe Permeability modification
US20100175895A1 (en) * 2007-06-26 2010-07-15 Paul David Metcalfe Permeability Modification
US20100186969A1 (en) * 2007-06-26 2010-07-29 Paul David Metcalfe Downhole Apparatus
US8479810B2 (en) 2007-06-26 2013-07-09 Paul David Metcalfe Downhole apparatus
EP2292893A3 (fr) * 2007-06-26 2011-05-18 Paul David Metcalfe Modification de perméabilité
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CA2542990A1 (fr) 2006-11-04
EP1719873A1 (fr) 2006-11-08
CA2542990C (fr) 2015-01-20

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