WO2013095093A1 - Seal sleeve and assembly including such a seal sleeve - Google Patents
Seal sleeve and assembly including such a seal sleeve Download PDFInfo
- Publication number
- WO2013095093A1 WO2013095093A1 PCT/NL2012/050814 NL2012050814W WO2013095093A1 WO 2013095093 A1 WO2013095093 A1 WO 2013095093A1 NL 2012050814 W NL2012050814 W NL 2012050814W WO 2013095093 A1 WO2013095093 A1 WO 2013095093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal sleeve
- wall
- inner element
- extends
- seal
- Prior art date
Links
- 239000002861 polymer material Substances 0.000 claims abstract description 13
- 230000008961 swelling Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 description 15
- 239000005060 rubber Substances 0.000 description 10
- 229920000459 Nitrile rubber Polymers 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000806 elastomer Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920005549 butyl rubber Polymers 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000004709 Chlorinated polyethylene Substances 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- 229920005556 chlorobutyl Polymers 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 description 1
- 229920006169 Perfluoroelastomer Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920005557 bromobutyl Polymers 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 229920006341 elastomeric alloy Polymers 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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
Definitions
- the invention relates to a seal sleeve having a seal sleeve wall that includes swellable polymer material, to an assembly including such a seal sleeve and to a method for applying a seal sleeve between an inner element and an outer element.
- a swellable seal sleeve is known from e.g. WO03/008756, WO06/003113 and US2007/0056735.
- the seal sleeves disclosed therein are annular objects with a radial wall thickness in a non- swollen state and an increased radial wall thickness in a swollen state.
- the sealing effect is obtained by virtue of the fact that the radial wall thickness of the annular object increases due to the swelling.
- the annular space that has to be closed off has a radial width of X and the material of which the seal sleeve is made has a swelling ratio of 2
- the minimum wall thickness of the annular seal sleeve according to the prior in a non-swollen state has to be X/2.
- the wall thickness of the annular seal sleeves of the prior art is also considerable.
- the prior art seal sleeves can only be used in annular spaces that have a limited width.
- WO2005/088064 discloses a sleeve that may be of swellable material and that is configured to be mounted on a expandable tubular section of the tubing. Expandable tubing is of reduced diameter during installation. After expansion, the internal diameter of the tubing is increased thus improving the flow of fluids through the tubing.
- a sleeve is disclosed that is connect at one end to a fixed ring on the tubing. The fixed ring holds the sleeve in place. A sliding ring is connected to the other and of the sleeve. The sleeve is notched or grooved to generate hinge or flexing sections. When the tubing is run into the borehole, the sleeve has a substantial cylindrical shape.
- an expansion tool is inserted into the tubing to radially expand the tubing.
- the expansion front of the tubing that moves forward along the tubing pushes the sliding ring of the sleeve towards the fixed ring of the sleeve.
- the sleeve is folded into an accordion shape.
- the sleeve 88 has an increased radial dimension, i.e. it extends substantially farther from the outer surface of the tubing than it did as installed for running in.
- the known sleeve is only fit to be used in expandable tubing because the accordion shape is obtained by virtue of the fact that the tubing is subjected to an expansion operation.
- the invention is directed to a seal sleeve that alleviates the problems of the prior art and that is fit to be applied on inner element that is not expandable, for example a non-expandable wellbore production tubular or a wellbore casing.
- the invention is directed to a seal sleeve with which an annular space between an inner element and an outer element can be closed off that has a considerable radial width.
- the invention provides a seal sleeve suitable to be mounted on an inner element, more particular on a non-expandable inner element, for example a wellbore production tubular or a wellbore casing, the seal sleeve having a seal sleeve wall comprising a swellable polymer material having elastomeric properties so that the seal sleeve has non-swollen state and an expanded state:
- the seal sleeve wall having a closed circumference that extends around a central longitudinal axis and that has a certain length in the direction of the central axis that extends in a longitudinal direction; • the seal sleeve wall having a non-swollen thickness that is defined by the distance between an inner surface and an outer surface of the seal sleeve wall in the non-swollen state and having a expanded thickness that is defined by the distance between the inner surface and the outer surface of the seal sleeve wall in the expanded state;
- seal sleeve wall before and after being mounted on an inner element includes:
- Such a seal sleeve may be applied for use in an assembly that includes an inner element having an outer surface and an outer element having an inner surface.
- the inner element being receivable within the outer element so that a circumferential space is present that extends in the longitudinal direction and that has a radial width defined by the distance between the outer surface of the inner element and the inner surface of the outer element.
- the seal sleeve is configured to close off the circumferential space in the expanded state thereof. In the non-swollen state the seal sleeve has a radial width that is less than the radial width of the circumferential space.
- the swellable polymer material swells in all directions to the same relative extent. That is, when the thickness of the seal sleeve wall in the non-swollen state is T, the thickness in the swollen state will be T.C wherein C is a constant that is larger than 1.
- the length LI of a first part or the length L2 of a second part as seen in a radial cross sectional view along a plane that includes the longitudinal axis, is generally much greater than the seal sleeve wall thickness T, for example in the order of 3T to 8T.
- the expansion in of the first part along its length and the second part along its length is in the order of 3T.C to 8T.C.
- first part and the second part extend radially outwardly and radially inwardly respectively when viewed in the longitudinal direction, the expansion along the length of the first and the second part leads to an increased radial expansion of the seal sleeve.
- a circumferential space having a larger radial width between an inner and an outer element can be sealed while the seal sleeve wall thickness may be kept relatively small. Consequently, the that the amount of swellable polymer material that is necessary to close off a circumferential space having a radial width may be reduced relative to the prior art seal sleeves that are manufactured form swellable polymer material.
- the first part of the seal sleeve wall when viewed in a cross sectional radial view along a central radial plane that includes the central axis A, extends in a direction Dl that includes an angle a with the central axis A.
- the amount of radial expansion is dependent on the angle a and the length LI of the first part.
- the angle a in the non-swollen state of the seal sleeve the angle a may be in the range of 25-90 degrees, preferably in the range of 45-80 degrees.
- the second part of the seal sleeve wall when viewed in a cross sectional radial view along a central radial plan that includes the central axis A, extends in a direction D2 that includes an angle 6 with the central axis A.
- the amount of radial expansion of the seal sleeve is dependent on the angle 6 and the length L2 of the second part.
- the angle 6 in the non-swollen state of the seal sleeve the angle 6 may be in the range 25-90 degrees, preferably in the range of 45-80 degrees.
- these angles a and 6 may increase up to 90 degrees.
- the situation in the swollen state of the seal sleeve may be that the inner surfaces of the first and the second wall parts that are directed towards each other in the non-swollen state are abutting against each other in the swollen state of the seal sleeve.
- a very strong structure will be obtained that has sufficient structural strength to withstand a large pressure difference between opposite sides of the seal sleeve.
- such a strong seal sleeve may have a bellow shaped seal sleeve wall.
- the bellow shape provides a plurality of sealing dams when the seal sleeve is in the expanded state thus providing an excellent seal between the opposite sides of the seal sleeve that may withstand a large pressure difference in the order of .several hundred bar.
- the seal sleeve may include a cylindrical core that is stiff.
- the core may be a metal core or a rubber or plastic core with a high rigidity.
- the seal sleeve may have a seal sleeve wall that comprises a part also extends at least partly at an inner surface of the cylindrical core.
- a seal sleeve wall that comprises a part also extends at least partly at an inner surface of the cylindrical core.
- an inner element such as for example a metal pipe or tube.
- the seal sleeve In the non-swollen state, the seal sleeve may be slid over the metal pipe or tube and be fixed by one or more fixation screw or other fixation means such as chemical bonding or a mechanical locking system.
- fixation screw or other fixation means such as chemical bonding or a mechanical locking system.
- the invention also provides an assembly of a seal sleeve according to the invention and an inner element having an outer surface and an outer element having an inner surface, wherein the inner element is receivable within the outer element so that a circumferential space is present that extends in a longitudinal direction D and that has a radial width W defined by the distance between the outer surface of the inner element and the inner surface of the outer element.
- the inner element may be a casing and the outer element may be a well bore hole wall.
- the inner element may be a production tubular and the outer element may be a casing of casing string in a well bore hole.
- the invention also provides a method for applying a seal sleeve between an inner element and an outer element.
- the method includes:
- FIG. 1 shows a front view of an example of an embodiment of an assembly including examples of two embodiments of a seal sleeve in a non- swollen state;
- Fig. 2 shows a cross sectional view over line II-II in Fig. 1, i.e. along a radial plane that includes a longitudinal axis A of the two seal sleeves shown therein;
- Fig. 3 shows a detail III of Fig. 2;
- Fig. 4 shows a front view of an example of an embodiment of an assembly including examples of two embodiments of a seal sleeve in an expanded state
- Fig. 5 shows a cross sectional view over line V-V in Fig. 4, i.e. along a radial plane that includes a longitudinal axis A of the two seal sleeves shown therein;
- Fig. 6 shows a detail VI of Fig. 5;
- Fig. 7 shows a perspective view of an example of a first embodiment of the seal sleeve
- Fig. 8 shows a side view of the example of the first embodiment of the seal sleeve in the non-swollen state
- Fig. 9 shows a side view of the example of the first embodiment of the seal sleeve in the expanded state.
- Fig. 10 shows a perspective view of the example of the second embodiment of the seal sleeve.
- Figs. 1-3 show an example of an embodiment of an assembly that includes an inner element 100 having an outer surface and an outer element 110 having an inner surface.
- the inner element 100 is received within the outer element 110 so that a circumferential space 120 is present that extends in a longitudinal direction D and that has a radial width W defined by the distance between the outer surface of the inner element 100 and the inner surface of the outer element 110.
- Figs. 1-3 show two examples of two different embodiments of a seal sleeve 10.
- FIG. 2 The example of a first embodiment of the seal sleeve 10 is shown left in Fig. 2 and in Figs. 7 and 8 in a non-swollen state.
- Fig. 5 on the left and Fig. 9 show the same example of the first embodiment in an expanded state.
- FIG. 2 The example of the second embodiment of the seal sleeve 10 is shown right in Fig. 2 and in the detail shown in Fig. 3 as well as in Fig. 10 in a non-swollen state.
- Fig. 5 on the right and the detail of Fig. 6 show the example of the second embodiment in an expanded state.
- a seal sleeve 10 that is suitable to be mounted on an inner element, more particular on a non-expandable inner element, for example a wellbore production tubular or a wellbore casing, has a seal sleeve wall 12 comprising a swellable polymer material having
- the seal sleeve wall 12 has a closed circumference that extends around a central longitudinal axis A and that has a certain length L in the direction of the central axis A that extends in the longitudinal direction D.
- the seal sleeve wall 12 has a non-swollen thickness Tn that is defined by the distance between an inner surface and an outer surface of the seal sleeve wall 12 in the non-swollen state.
- the seal sleeve wall 12 also has an expanded thickness Te that is defined by the distance between the inner surface and the outer surface of the seal sleeve wall 12 in the expanded state.
- the non-swollen thickness Tn is considerable less than the radial width W of the
- the expanded thickness Te is, in general also less than the radial width W of the circumferential space W, this in contrast to the prior art sleeves.
- the seal sleeve 10 also defines a radial seal sleeve width Ws which is the width Ws that is defined by the difference between the smallest inner radius of the seal sleeve 10 and the largest outer radius of the seal sleeve 10. In the non-swollen state the seal sleeve width Wsn is considerably less than seal sleeve width Wse in the expanded state.
- the seal sleeve width Wse in the expanded state in general is equal to the width W of the circumferential space 120. If no outer element 110 is present, the seal sleeve width Wse in the expande state of the seal sleeve 10 will, in general, be considerably larger than the width W of the circumferential space 120.
- the seal sleeve wall 12 Before and after being mounted on an inner element, the seal sleeve wall 12 generally includes a first longitudinal wall part 14 that extends, when viewed in the longitudinal direction D, radially outwardly.
- the seal sleeve wall 12 additionally includes a second longitudinal wall part 16 that extends, when viewed in the longitudinal direction D, radially inwardly.
- first longitudinal wall part 14 there are only one first longitudinal wall part 14 and one second longitudinal wall part 16, as is clearly visible in Figs. 7-9 that shows an example of the first embodiment of the seal sleeve 10.
- a said first part 14, 14a- 14e of the seal sleeve wall 12 when viewed in a cross sectional radial view along a central radial plane that includes the central axis A, extends in a direction Dl that includes an angle a with the central axis A in the range of 25-90 degrees, preferably 45- 80 degrees.
- a said second part 16, 16a- 16e of the seal sleeve wall 12, when viewed in a cross sectional radial view along a central radial plan that includes the central axis A, extends in a direction D2 that includes an angle 6 with the central axis A in the range 25-90 degrees, preferably 45-80 degrees.
- the seal sleeve 10 may comprise a cylindrical core 18 that is stiff.
- the cylindrical core 18 is provided at an inner side of the seal sleeve wall 12.
- a part 20 of the seal sleeve wall 12 may also extend at least partly at an inner surface of the cylindrical core 18.
- the cylindrical core 18 may be completely embedded in the seal sleeve wall 12 of swellable polymer material.
- Such an embodiment has the advantage of structural strength in combination with an easy mounting of the seal sleeve 10 on an inner element 100.
- the seal sleeve may be shifted over the inner element 100 and may be temporarily fixed by fixing means such as a fixing screw, a wedge or glue. After swelling the part of the seal sleeve wall 12 that is on the inside of the cylindrical core 18 expands against the inner element 100 and thus provides an excellent seal on that side as well.
- the inner element 100 may be a production tubular and the outer element 110 may be a casing in a well bore hole.
- Figs. 1-6 show an example of such an embodiment of the assembly.
- the casing 110 extends in a bore hole in an earth layer 130.
- the inner element 100 may a casing of a casing string and the outer element 110 may be a well bore hole wall.
- the outer element 110 may a housing of an apparatus and the inner element 100 may be a shaft that is mounted in the housing.
- Suitable elastomers are rubber materials which, apart from swelling in watery fluids alternatively or additionally may swell in crude oil present in petroleum wells. Alternatively or additionally rubber materials may be used that swell in contact with certain gases. Watery fluids may be neutral, alkaline or acid fluids.
- suitable rubber materials are ethylene propylene rubber (EPM and EPDM); ethylene- propylene-diene terpolymer rubber (EPT); butyl rubber (IIR); brominated butyl rubber (BUR); chlorinated butyl rubber (CIIR); chlorinated polyethylene (CM/CPE); neoprene rubber (CR);
- rubber materials which do not swell in crude oil such as butadiene acrylonitrile copolymer (nitrile rubber, NBR); hydrogenated NBR (HNBR, HNS), such as ZETPOLTM, TORNACTM, TERBANTM; NBR with reactive groups (X-NBR); perfluoro rubbers (FFKM) such as KALREZTM, CHEMRAZTM; fluoro rubbers (FKM), such as VITONTM, FLUORELTM; and tetrafluorethylene/propylene (TFE/P), such as AFLASTM.
- NBR butadiene acrylonitrile copolymer
- HNBR, HNS hydrogenated NBR
- ZETPOLTM ZETPOLTM
- TORNACTM TORNACTM
- TERBANTM NBR with reactive groups
- X-NBR NBR with reactive groups
- FFKM perfluoro rubbers
- FKM fluoro rubbers
- VITONTM VITONTM
- elastomers can be crosslinked by more than one crosslinking agent ⁇ e.g. either sulphur crosslinked or peroxide crosslinked).
- thermoset non swelling and oil swelling
- elastomeric alloys blends of elastomers can be applied (so called “elastomeric alloys”.
- EPDM/polypropylene blends such as SARLINKTM, LevaflexTM,
- NBR/polyvinylchloride blends and NR/polypropylene blends. All of these have a tendency to swell in petroleum crudes, especially at the targeted downhole well temperatures.
- seal sleeve 10 may be applied at a desired position and an adequate sealing may be obtained both at the outer
- seal sleeve 10 When the seal sleeve 10 is provided with a cylindrical core 18 that is rigid, the sealing at the inside of the seal sleeve 10 may be further promoted when a part of seal sleeve wall 12 of swellable polymer material also extends at least partly along an inner surface of the cylindrical core 18.
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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)
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Abstract
Seal sleeve and assembly including such a seal sleeve. A seal sleeve (10) having a seal sleeve wall (12) comprising a swellable polymer material having elastomeric properties so that the seal sleeve has non-swollen state and an expanded state, wherein the seal sleeve wall has a closed circumference that extends around a central longitudinal axis and that has a certain length (L) in the direction of the central axis that extends in the longitudinal direction (D), the seal sleeve wall having a non-swollen thickness that is defined by the distance between an inner surface and an outer surface of the seal sleeve wall in the non-swollen state, the non-swollen thickness being less than the radial width of a circumferential space between an inner and an outer element that has to be closed off by the seal sleeve, wherein the seal sleeve wall includes a first longitudinal wall part (14) that extends radially outwardly, and a second longitudinal wall part (16) that extends radially inwardly, when viewed in the longitudinal direction.
Description
Title: Seal sleeve and assembly including such a seal sleeve.
Technical Field
The invention relates to a seal sleeve having a seal sleeve wall that includes swellable polymer material, to an assembly including such a seal sleeve and to a method for applying a seal sleeve between an inner element and an outer element.
Background
A swellable seal sleeve is known from e.g. WO03/008756, WO06/003113 and US2007/0056735. In all these publications the seal sleeves disclosed therein are annular objects with a radial wall thickness in a non- swollen state and an increased radial wall thickness in a swollen state.
In all the publications, the sealing effect is obtained by virtue of the fact that the radial wall thickness of the annular object increases due to the swelling. Suppose that the annular space that has to be closed off has a radial width of X and the material of which the seal sleeve is made has a swelling ratio of 2, then the minimum wall thickness of the annular seal sleeve according to the prior in a non-swollen state has to be X/2. Especially when the annular space that has to be sealed has a considerable radial width, the wall thickness of the annular seal sleeves of the prior art is also considerable. As a consequence, the prior art seal sleeves can only be used in annular spaces that have a limited width.
WO2005/088064 discloses a sleeve that may be of swellable material and that is configured to be mounted on a expandable tubular section of the tubing. Expandable tubing is of reduced diameter during installation. After expansion, the internal diameter of the tubing is increased thus improving the flow of fluids through the tubing. In figures 6-7 of the publication, a sleeve is disclosed that is connect at one end to a fixed ring on the tubing. The fixed ring holds the sleeve in place. A sliding ring is connected to the other and of the sleeve. The sleeve is notched or grooved to generate hinge or flexing sections.
When the tubing is run into the borehole, the sleeve has a substantial cylindrical shape. Subsequently, an expansion tool is inserted into the tubing to radially expand the tubing. When moving the expansion tool through the tubing, the expansion front of the tubing that moves forward along the tubing pushes the sliding ring of the sleeve towards the fixed ring of the sleeve.
Thereby, the sleeve is folded into an accordion shape. In the folded condition, the sleeve 88 has an increased radial dimension, i.e. it extends substantially farther from the outer surface of the tubing than it did as installed for running in. The known sleeve is only fit to be used in expandable tubing because the accordion shape is obtained by virtue of the fact that the tubing is subjected to an expansion operation.
Summary of the Invention
The invention is directed to a seal sleeve that alleviates the problems of the prior art and that is fit to be applied on inner element that is not expandable, for example a non-expandable wellbore production tubular or a wellbore casing.
More particularly, the invention is directed to a seal sleeve with which an annular space between an inner element and an outer element can be closed off that has a considerable radial width.
To that end the invention provides a seal sleeve suitable to be mounted on an inner element, more particular on a non-expandable inner element, for example a wellbore production tubular or a wellbore casing, the seal sleeve having a seal sleeve wall comprising a swellable polymer material having elastomeric properties so that the seal sleeve has non-swollen state and an expanded state:
• the seal sleeve wall having a closed circumference that extends around a central longitudinal axis and that has a certain length in the direction of the central axis that extends in a longitudinal direction;
• the seal sleeve wall having a non-swollen thickness that is defined by the distance between an inner surface and an outer surface of the seal sleeve wall in the non-swollen state and having a expanded thickness that is defined by the distance between the inner surface and the outer surface of the seal sleeve wall in the expanded state;
characterized in that the seal sleeve wall, before and after being mounted on an inner element includes:
• a first longitudinal wall part that extends, when viewed in the longitudinal direction, radially outwardly; and
• a second longitudinal wall part that extends, when viewed in the longitudinal direction, radially inwardly.
Such a seal sleeve may be applied for use in an assembly that includes an inner element having an outer surface and an outer element having an inner surface. The inner element being receivable within the outer element so that a circumferential space is present that extends in the longitudinal direction and that has a radial width defined by the distance between the outer surface of the inner element and the inner surface of the outer element. The seal sleeve is configured to close off the circumferential space in the expanded state thereof. In the non-swollen state the seal sleeve has a radial width that is less than the radial width of the circumferential space.
Generally, the swellable polymer material swells in all directions to the same relative extent. That is, when the thickness of the seal sleeve wall in the non-swollen state is T, the thickness in the swollen state will be T.C wherein C is a constant that is larger than 1. However, the length LI of a first part or the length L2 of a second part, as seen in a radial cross sectional view along a plane that includes the longitudinal axis, is generally much greater than the seal sleeve wall thickness T, for example in the order of 3T to 8T. Thus the expansion in of the first part along its length and the second part
along its length is in the order of 3T.C to 8T.C. Because the first part and the second part extend radially outwardly and radially inwardly respectively when viewed in the longitudinal direction, the expansion along the length of the first and the second part leads to an increased radial expansion of the seal sleeve. As a consequence, a circumferential space having a larger radial width between an inner and an outer element can be sealed while the seal sleeve wall thickness may be kept relatively small. Consequently, the that the amount of swellable polymer material that is necessary to close off a circumferential space having a radial width may be reduced relative to the prior art seal sleeves that are manufactured form swellable polymer material.
The first part of the seal sleeve wall, when viewed in a cross sectional radial view along a central radial plane that includes the central axis A, extends in a direction Dl that includes an angle a with the central axis A. The amount of radial expansion is dependent on the angle a and the length LI of the first part.
In an embodiment, in the non-swollen state of the seal sleeve the angle a may be in the range of 25-90 degrees, preferably in the range of 45-80 degrees.
The second part of the seal sleeve wall, when viewed in a cross sectional radial view along a central radial plan that includes the central axis A, extends in a direction D2 that includes an angle 6 with the central axis A. The amount of radial expansion of the seal sleeve is dependent on the angle 6 and the length L2 of the second part.
In an embodiment, in the non-swollen state of the seal sleeve the angle 6 may be in the range 25-90 degrees, preferably in the range of 45-80 degrees.
As a consequence of the swelling, these angles a and 6 may increase up to 90 degrees. Because the first and second longitudinal wall parts also swell in thickness, the situation in the swollen state of the seal sleeve may be that the inner surfaces of the first and the second wall parts that are directed
towards each other in the non-swollen state are abutting against each other in the swollen state of the seal sleeve. Thus a very strong structure will be obtained that has sufficient structural strength to withstand a large pressure difference between opposite sides of the seal sleeve.
An even better strength and thus better ability to withstand a pressure difference between opposite sides of the seal sleeve may be obtained with an embodiment that includes a plurality of said first parts and a plurality of said second parts, wherein, viewed in the longitudinal direction D, first parts and second parts are alternately consecutively provided. In effect, this creates a seal with a plurality of sealing dams.
In an embodiment, such a strong seal sleeve may have a bellow shaped seal sleeve wall. The bellow shape provides a plurality of sealing dams when the seal sleeve is in the expanded state thus providing an excellent seal between the opposite sides of the seal sleeve that may withstand a large pressure difference in the order of .several hundred bar.
In order to further improve the strength of the structure of the seal sleeve, in an embodiment, the seal sleeve may include a cylindrical core that is stiff. The core may be a metal core or a rubber or plastic core with a high rigidity.
In an embodiment of the seal sleeve with a cylindrical core, the seal sleeve may have a seal sleeve wall that comprises a part also extends at least partly at an inner surface of the cylindrical core. Such a construction may be advantageous for mounting the seal sleeve on an inner element, such as for example a metal pipe or tube. In the non-swollen state, the seal sleeve may be slid over the metal pipe or tube and be fixed by one or more fixation screw or other fixation means such as chemical bonding or a mechanical locking system. When the swellable material is brought into the expanded state, a
hermetically closed seal between the cylindrical core and the inner element is automatically obtained due to the expansion of the seal sleeve wall part that extends at the inner surface of the cylindrical core.
The invention also provides an assembly of a seal sleeve according to the invention and an inner element having an outer surface and an outer element having an inner surface, wherein the inner element is receivable within the outer element so that a circumferential space is present that extends in a longitudinal direction D and that has a radial width W defined by the distance between the outer surface of the inner element and the inner surface of the outer element.
In an embodiment, the inner element may be a casing and the outer element may be a well bore hole wall.
In yet another embodiment, the inner element may be a production tubular and the outer element may be a casing of casing string in a well bore hole.
The invention also provides a method for applying a seal sleeve between an inner element and an outer element. The method includes:
• providing an outer element having inner surface;
• providing an inner element having an outer surface, the dimension of the inner element relative to the outer element being such that the inner element is receivable in the outer element;
• providing a seal sleeve according to the invention;
• applying the seal sleeve over the inner element;
• fixing the seal sleeve at a longitudinal position on the inner element;
• introducing the inner element into the outer element; and
providing a liquid that induces the swelling of the swellable polymer material of the seal sleeve wall.
The invention will be further elucidated with reference to some examples of embodiment that are shown in the drawings.
Brief Description of the Drawings
Fig. 1 shows a front view of an example of an embodiment of an assembly including examples of two embodiments of a seal sleeve in a non- swollen state;
Fig. 2 shows a cross sectional view over line II-II in Fig. 1, i.e. along a radial plane that includes a longitudinal axis A of the two seal sleeves shown therein;
Fig. 3 shows a detail III of Fig. 2;
Fig. 4 shows a front view of an example of an embodiment of an assembly including examples of two embodiments of a seal sleeve in an expanded state;
Fig. 5 shows a cross sectional view over line V-V in Fig. 4, i.e. along a radial plane that includes a longitudinal axis A of the two seal sleeves shown therein;
Fig. 6 shows a detail VI of Fig. 5;
Fig. 7 shows a perspective view of an example of a first embodiment of the seal sleeve;
Fig. 8 shows a side view of the example of the first embodiment of the seal sleeve in the non-swollen state;
Fig. 9 shows a side view of the example of the first embodiment of the seal sleeve in the expanded state; and
Fig. 10 shows a perspective view of the example of the second embodiment of the seal sleeve.
Detailed Description
Figs. 1-3 show an example of an embodiment of an assembly that includes an inner element 100 having an outer surface and an outer element 110 having an inner surface. The inner element 100 is received within the outer element 110 so that a circumferential space 120 is present that extends in a longitudinal direction D and that has a radial width W defined by the distance between the outer surface of the inner element 100 and the inner
surface of the outer element 110. Figs. 1-3 show two examples of two different embodiments of a seal sleeve 10.
The example of a first embodiment of the seal sleeve 10 is shown left in Fig. 2 and in Figs. 7 and 8 in a non-swollen state. Fig. 5 on the left and Fig. 9 show the same example of the first embodiment in an expanded state.
The example of the second embodiment of the seal sleeve 10 is shown right in Fig. 2 and in the detail shown in Fig. 3 as well as in Fig. 10 in a non-swollen state. Fig. 5 on the right and the detail of Fig. 6 show the example of the second embodiment in an expanded state.
Generally, a seal sleeve 10 according to the invention that is suitable to be mounted on an inner element, more particular on a non-expandable inner element, for example a wellbore production tubular or a wellbore casing, has a seal sleeve wall 12 comprising a swellable polymer material having
elastomeric properties so that the seal sleeve has non-swollen state and an expanded state. The seal sleeve wall 12 has a closed circumference that extends around a central longitudinal axis A and that has a certain length L in the direction of the central axis A that extends in the longitudinal direction D. The seal sleeve wall 12 has a non-swollen thickness Tn that is defined by the distance between an inner surface and an outer surface of the seal sleeve wall 12 in the non-swollen state. The seal sleeve wall 12 also has an expanded thickness Te that is defined by the distance between the inner surface and the outer surface of the seal sleeve wall 12 in the expanded state. The non-swollen thickness Tn is considerable less than the radial width W of the
circumferential space 120. The expanded thickness Te is, in general also less than the radial width W of the circumferential space W, this in contrast to the prior art sleeves. The seal sleeve 10 also defines a radial seal sleeve width Ws which is the width Ws that is defined by the difference between the smallest inner radius of the seal sleeve 10 and the largest outer radius of the seal sleeve 10. In the non-swollen state the seal sleeve width Wsn is considerably less than seal sleeve width Wse in the expanded state. When the seal sleeve 10 is
applied in the assembly, i.e. expanded between the inner element 100 and the outer element 110, the seal sleeve width Wse in the expanded state in general is equal to the width W of the circumferential space 120. If no outer element 110 is present, the seal sleeve width Wse in the expande state of the seal sleeve 10 will, in general, be considerably larger than the width W of the circumferential space 120.
Before and after being mounted on an inner element, the seal sleeve wall 12 generally includes a first longitudinal wall part 14 that extends, when viewed in the longitudinal direction D, radially outwardly. The seal sleeve wall 12 additionally includes a second longitudinal wall part 16 that extends, when viewed in the longitudinal direction D, radially inwardly.
In the first embodiment there are only one first longitudinal wall part 14 and one second longitudinal wall part 16, as is clearly visible in Figs. 7-9 that shows an example of the first embodiment of the seal sleeve 10.
In the second embodiment, there is a plurality of said first parts
14a- 14e and a plurality of said second parts 14a- 14e. When viewed in the longitudinal direction D the first parts 14a- 14e and the second parts 16a- 16e are alternately consecutively provided. This is clearly visible in the cross- sectional view on page 2 and in Fig. 10. This specific example of the second embodiment has a seal sleeve wall 12 that is bellow shaped.
As shown in Fig. 2 a said first part 14, 14a- 14e of the seal sleeve wall 12, when viewed in a cross sectional radial view along a central radial plane that includes the central axis A, extends in a direction Dl that includes an angle a with the central axis A in the range of 25-90 degrees, preferably 45- 80 degrees. A said second part 16, 16a- 16e of the seal sleeve wall 12, when viewed in a cross sectional radial view along a central radial plan that includes the central axis A, extends in a direction D2 that includes an angle 6 with the central axis A in the range 25-90 degrees, preferably 45-80 degrees.
When the Dl and D2 directions include angles in such ranges with the longitudinal axis A, a seal sleeve 10 is obtained that provides a great
structural strength in an expanded state so that a large pressure difference at opposite sides of the seal sleeve 10 may be withstand by the seal sleeve 10.
In an embodiment, of which examples are shown in the figures, the seal sleeve 10 may comprise a cylindrical core 18 that is stiff. In the examples that are shown in the figures, the cylindrical core 18 is provided at an inner side of the seal sleeve wall 12.
In another an embodiment of a seal sleeve 10 with a cylindrical core 18, a part 20 of the seal sleeve wall 12 may also extend at least partly at an inner surface of the cylindrical core 18. In such an embodiment, the cylindrical core 18 may be completely embedded in the seal sleeve wall 12 of swellable polymer material. Such an embodiment has the advantage of structural strength in combination with an easy mounting of the seal sleeve 10 on an inner element 100. The seal sleeve may be shifted over the inner element 100 and may be temporarily fixed by fixing means such as a fixing screw, a wedge or glue. After swelling the part of the seal sleeve wall 12 that is on the inside of the cylindrical core 18 expands against the inner element 100 and thus provides an excellent seal on that side as well.
In an embodiment of the assembly, the inner element 100 may be a production tubular and the outer element 110 may be a casing in a well bore hole. Figs. 1-6 show an example of such an embodiment of the assembly. The casing 110 extends in a bore hole in an earth layer 130.
In an another embodiment of the assembly, the inner element 100 may a casing of a casing string and the outer element 110 may be a well bore hole wall.
In yet another embodiment, the outer element 110 may a housing of an apparatus and the inner element 100 may be a shaft that is mounted in the housing.
Suitable elastomers are rubber materials which, apart from swelling in watery fluids alternatively or additionally may swell in crude oil present in petroleum wells. Alternatively or additionally rubber materials may be used
that swell in contact with certain gases. Watery fluids may be neutral, alkaline or acid fluids. Examples of suitable rubber materials are ethylene propylene rubber (EPM and EPDM); ethylene- propylene-diene terpolymer rubber (EPT); butyl rubber (IIR); brominated butyl rubber (BUR); chlorinated butyl rubber (CIIR); chlorinated polyethylene (CM/CPE); neoprene rubber (CR);
epichlorohydrin ethylene oxide copolymer (CO, ECO); styrene butadiene copolymer rubber (SBR); sulphonated polyethylene (CSM); ethylene acrylate rubber (EAM/AEM); silicone rubbers (VMQ); and fluorsilicone rubber (FVMQ).
Also suitable are rubber materials which do not swell in crude oil, such as butadiene acrylonitrile copolymer (nitrile rubber, NBR); hydrogenated NBR (HNBR, HNS), such as ZETPOL™, TORNAC™, TERBAN™; NBR with reactive groups (X-NBR); perfluoro rubbers (FFKM) such as KALREZ™, CHEMRAZ™; fluoro rubbers (FKM), such as VITON™, FLUOREL™; and tetrafluorethylene/propylene (TFE/P), such as AFLAS™.
Most of these elastomers can be crosslinked by more than one crosslinking agent {e.g. either sulphur crosslinked or peroxide crosslinked).
Apart from the thermoset (non swelling and oil swelling) elastomer matrix materials quoted above, also blends of elastomers can be applied (so called "elastomeric alloys"). Although an almost inexhaustible combination of thermoplastic and thermoset elastomers are feasible, the most preferred are the EPDM/polypropylene blends such as SARLINK™, Levaflex™,
Santoprene™, NBR-polypropylene blends such as GEOLAST™,
NBR/polyvinylchloride blends and NR/polypropylene blends. All of these have a tendency to swell in petroleum crudes, especially at the targeted downhole well temperatures.
In an application of the seal sleeve 10, the following method may be used:
• providing an outer element 110 having inner surface;
• providing an inner element 100 having an outer surface, the
dimension of the inner element 100 relative to the outer element 110
being such that the inner element 100 is receivable in the outer element 110;
• providing a seal sleeve 10 according to any one of claims 1-7;
• applying the seal sleeve 10 over the inner element 100;
· fixing the seal sleeve 10 at a longitudinal position on the inner
element 100;
• introducing the inner element 100 into the outer element 110;
• providing a liquid that induces the swelling of the swellable polymer material of the seal sleeve wall 12.
With this method the seal sleeve 10 may be applied at a desired position and an adequate sealing may be obtained both at the outer
circumference of the seal sleeve 10 and the inner circumference of the seal sleeve 10. When the seal sleeve 10 is provided with a cylindrical core 18 that is rigid, the sealing at the inside of the seal sleeve 10 may be further promoted when a part of seal sleeve wall 12 of swellable polymer material also extends at least partly along an inner surface of the cylindrical core 18.
Although illustrative embodiments of the present invention have been described above, in part with reference to the accompanying drawings, it is to be understood that the invention is not limited to these embodiments. Variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the
embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an
embodiment" in various places throughout this specification are not
necessarily all referring to the same embodiment. Furthermore, it is noted that particular features, structures, or characteristics of one or more embodiments
may be combined in any suitable manner to form new, not explicitly described embodiments.
Claims
1. A seal sleeve (10) suitable to be mounted on an inner element, more particular on a non-expandable inner element, for example a wellbore production tubular or a wellbore casing, the seal sleeve having a seal sleeve wall (12) comprising a swellable polymer material having elastomeric properties so that the seal sleeve has non-swollen state and an expanded state:
• the seal sleeve wall (12) having a closed circumference that
extends around a central longitudinal axis (A) and that has a certain length (L) in the direction of the central axis (A) that extends in a longitudinal direction (D);
• the seal sleeve wall (12) having a non-swollen thickness (Tn) that is defined by the distance between an inner surface and an outer surface of the seal sleeve wall (12) in the non-swollen state and having a expanded thickness (Te) that is defined by the distance between the inner surface and the outer surface of the seal sleeve wall (12) in the expanded state;
characterized in that the seal sleeve wall (12), before and after being mounted on an inner element includes:
• a first longitudinal wall part (14; 14a- 14e) that extends, when viewed in the longitudinal direction (D), radially outwardly; and
• a second longitudinal wall part (16; 16a- 16e) that extends, when viewed in the longitudinal direction (D), radially inwardly.
2. The seal sleeve according to claim 1, including:
• a plurality of said first parts (14a-14e); and
• a plurality of said second parts (14a- 14e),
wherein, viewed in the longitudinal direction (D), first parts (14a- 14e) and second parts (16a- 16e) are alternately consecutively provided.
3. The seal sleeve according to claim 1 or 2, wherein the seal sleeve wall (12) before and after being mounted on an inner element is bellow shaped.
4. The seal sleeve according to any of the preceding claims, wherein a said first part (14; 14a- 14e) of the seal sleeve wall (12), when viewed in a cross sectional radial view along a central radial plane that includes the central axis (A), extends in a direction (Dl) that includes an angle a with the central axis (A) in the range of 25-90 degrees, preferably 45-80 degrees.
5. The seal sleeve according to any of the preceding claims, wherein a said second part (16; 16a- 16e) of the seal sleeve wall (12), when viewed in a cross sectional radial view along a central radial plan that includes the central axis (A), extends in a direction (D2) that includes an angle 6 with the central axis (A) in the range 25-90 degrees, preferably 45-80 degrees.
6. The seal sleeve according to any of the preceding claims, including:
• a cylindrical core (18) that is stiff.
7. The seal sleeve according to claim 6, wherein a part (20) of the seal sleeve wall (12) also extends at least partly at an inner surface of the cylindrical core (18).
8. An assembly of a seal sleeve (10) according to any of the preceding claims and an inner element (100) having an outer surface and an outer element (110) having an inner surface, the inner element (100) being receivable within the outer element (110) so that a circumferential space (120) is present that extends in a longitudinal direction (D) and that has a radial width (W) defined by the distance between the outer surface of the inner element (100) and the inner surface of the outer element (110).
9. An assembly according to claim 8, wherein the inner element (100) is a casing of a casing string and the outer element (110) is a well bore hole wall.
10. An assembly according to claim 8, wherein the inner element (100) is a production tubular and the outer element (110) is a casing in a well bore hole.
11. An assembly according to claim 8, wherein the outer element (110) is a housing of an apparatus and the inner element (100) is a shaft that is mounted in the housing.
12. Method for applying a seal sleeve between an inner element (100) and an outer element (110), the method including:
• providing an outer element (110) having inner surface;
• providing an inner element (100) having an outer surface, the
dimension of the inner element (100) relative to the outer element (HO) being such that the inner element (100) is receivable in the outer element (110);
• providing a seal sleeve (10) according to any one of claims 1-7;
• applying the seal sleeve (10) over the inner element (100);
• fixing the seal sleeve (10) at a longitudinal position on the inner element (100);
• introducing the inner element (100) into the outer element (110);
• providing a liquid that induces the swelling of the swellable polymer material of the seal sleeve wall (12).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2007810A NL2007810C2 (en) | 2011-11-18 | 2011-11-18 | Seal sleeve and assembly including such a seal sleeve. |
NL2007810 | 2011-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013095093A1 true WO2013095093A1 (en) | 2013-06-27 |
Family
ID=47263544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2012/050814 WO2013095093A1 (en) | 2011-11-18 | 2012-11-16 | Seal sleeve and assembly including such a seal sleeve |
Country Status (2)
Country | Link |
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NL (1) | NL2007810C2 (en) |
WO (1) | WO2013095093A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015077694A1 (en) * | 2013-11-25 | 2015-05-28 | Halliburton Energy Services, Inc. | Seal assembly for wellbore tool |
US9624752B2 (en) | 2014-10-03 | 2017-04-18 | Ruma Products Holding B.V. | Seal and assembly comprising the seal and method for applying the seal |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106677737A (en) * | 2017-03-10 | 2017-05-17 | 北京奥赛旗石油科技开发有限公司 | Sealing assembly and sealing equipment |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3385367A (en) * | 1966-12-07 | 1968-05-28 | Kollsman Paul | Sealing device for perforated well casing |
WO2003008756A1 (en) | 2001-07-18 | 2003-01-30 | Shell Internationale Research Maatschappij B.V. | Wellbore system with annular seal member |
WO2005088064A1 (en) | 2004-02-13 | 2005-09-22 | Halliburton Energy Services Inc. | Annular isolators for tubulars in wellbores |
WO2006003113A1 (en) | 2004-06-25 | 2006-01-12 | Shell Internationale Research Maatschappij B.V. | Screen for controlling inflow of solid particles in a wellbore |
US20070056735A1 (en) | 2003-07-29 | 2007-03-15 | Bosma Martin Gerard R | System for sealing a space in a wellbore |
WO2009027658A1 (en) * | 2007-08-25 | 2009-03-05 | Swellfix B.V. | Sealing assembly |
-
2011
- 2011-11-18 NL NL2007810A patent/NL2007810C2/en not_active IP Right Cessation
-
2012
- 2012-11-16 WO PCT/NL2012/050814 patent/WO2013095093A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3385367A (en) * | 1966-12-07 | 1968-05-28 | Kollsman Paul | Sealing device for perforated well casing |
WO2003008756A1 (en) | 2001-07-18 | 2003-01-30 | Shell Internationale Research Maatschappij B.V. | Wellbore system with annular seal member |
US20070056735A1 (en) | 2003-07-29 | 2007-03-15 | Bosma Martin Gerard R | System for sealing a space in a wellbore |
WO2005088064A1 (en) | 2004-02-13 | 2005-09-22 | Halliburton Energy Services Inc. | Annular isolators for tubulars in wellbores |
WO2006003113A1 (en) | 2004-06-25 | 2006-01-12 | Shell Internationale Research Maatschappij B.V. | Screen for controlling inflow of solid particles in a wellbore |
WO2009027658A1 (en) * | 2007-08-25 | 2009-03-05 | Swellfix B.V. | Sealing assembly |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015077694A1 (en) * | 2013-11-25 | 2015-05-28 | Halliburton Energy Services, Inc. | Seal assembly for wellbore tool |
GB2535047A (en) * | 2013-11-25 | 2016-08-10 | Halliburton Energy Services Inc | Seal assembly for wellbore tool |
GB2535047B (en) * | 2013-11-25 | 2017-10-04 | Halliburton Energy Services Inc | Seal assembly for wellbore tool |
US9624752B2 (en) | 2014-10-03 | 2017-04-18 | Ruma Products Holding B.V. | Seal and assembly comprising the seal and method for applying the seal |
Also Published As
Publication number | Publication date |
---|---|
NL2007810C2 (en) | 2013-05-23 |
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