US20070056725A1 - Seal assembly - Google Patents
Seal assembly Download PDFInfo
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- US20070056725A1 US20070056725A1 US11/363,783 US36378306A US2007056725A1 US 20070056725 A1 US20070056725 A1 US 20070056725A1 US 36378306 A US36378306 A US 36378306A US 2007056725 A1 US2007056725 A1 US 2007056725A1
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- seal assembly
- elastomeric portion
- extrusion barrier
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/1216—Anti-extrusion means, e.g. means to prevent cold flow of rubber packing
Definitions
- the present invention relates generally to a seal assembly, such as a seal assembly for use with a well bore packing tool (commonly referred to as “packer”), and particularly to a seal assembly having an elastomeric material portion, and primary and secondary extrusion barrier portions, which reinforce the elastomeric material portion and increase the life and durability of the seal assembly.
- a seal assembly such as a seal assembly for use with a well bore packing tool (commonly referred to as “packer”), and particularly to a seal assembly having an elastomeric material portion, and primary and secondary extrusion barrier portions, which reinforce the elastomeric material portion and increase the life and durability of the seal assembly.
- Seal assemblies such as those used on well bore packers are typically cylindrically shaped structures having an inner diameter disposed in surrounding relation to a first device, such as a packer, and an outer diameter that may be forced into sealing engagement with a second device, such as an inner diameter of a casing segment.
- seal assemblies typically include an elastomeric material portion, which may be deformed to extend radially outwardly to sealingly engage the inner diameter of the casing segment.
- the elastomeric material has a tendency to extrude, or extend, longitudinally along the inner diameter of the casing segment. Such a movement of the elastomeric material decreases the sealing efficiency of the elastomeric material.
- some seal assemblies include an extrusion barrier disposed adjacent to the elastomeric material at the open ended portions of the seal assembly.
- extrusion barriers reinforce the elastomeric material, while preventing (or at least reducing) the extrusion of the elastomeric material longitudinally along the inner diameter of the casing segment, thus improving the sealing efficiency of the elastomeric material.
- a problem with such a configuration is that, during deformation, portions of the elastomeric material often extend into expanded areas in the extrusion barrier.
- the extrusion barrier is a coil spring
- the elastomeric material tends to extend into the expanded areas between the coils.
- the extrusion barrier often pulls at or pinches the elastomeric material as the elastomeric material exits the expanded areas in the extrusion barrier.
- This type of wear is commonly associated with, but not limited to, applications which require multiple sets of a packer (i.e. when the seals of a packer are alternately sealed and unsealed multiple times) with the application of multiple high pressure differentials applied across the seal.
- the present invention is a seal assembly that includes an elastomeric portion; a primary extrusion barrier which reinforces the elastomeric portion; and a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
- the present invention is a seal assembly that includes an elastomeric portion; a primary extrusion barrier, which is more rigid than the elastomeric portion to reinforce the elastomeric portion; and a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier, which is more dense than the elastomeric portion to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
- the present invention is a well bore packer that includes a packer mandrel; and either of the seal assemblies described above disposed in surrounding relation to the packer mandrel.
- FIG. 1 is side view of an upper portion of a well bore packer having a seal assembly according to one embodiment of the present invention disposed thereon;
- FIG. 2 is a longitudinal cross-sectional view of a well bore packer having a seal assembly according to another embodiment of the present invention disposed thereon;
- FIG. 3 is a longitudinal cross-sectional view of a well bore packer having a seal assembly according to yet another embodiment of the present invention disposed thereon.
- embodiments of the present invention are directed to a seal assembly.
- the seal assembly includes an elastomeric material portion, and a primary extrusion barrier for reinforcing the elastomeric material portion.
- a secondary extrusion barrier Disposed between the elastomeric material portion and the primary extrusion barrier is a secondary extrusion barrier.
- the secondary extrusion barrier prevents the elastomeric material portion from extruding, or extending, into the primary extrusion barrier during deformation of the elastomeric material portion. If the elastomeric material portion is allowed to extrude into the primary extrusion barrier, the elastomeric material portion wears at an undesirably high rate. As such, the secondary extrusion barrier increases the life and durability of the seal assembly.
- FIG. 1 shows a seal assembly 10 according to one embodiment of the present invention.
- a seal assembly according to the present invention may be used in conjunction with any appropriate device, in the depicted embodiment, the seal assembly is disposed on a well bore packer 12 (note, for clarity purposes, only the upper portion of the packer is shown.)
- the packer 12 may be any appropriate packer, such as that described in U.S. Pat. App. No. 60/652,805, entitled “Packer for Spirit Tool”, and related non-provisional filed on Aug. 26, 2005(Atty. Dk. No. 25.0316), the entire contents of which is hereby incorporated by reference.
- the seal assembly 10 When used in combination with a well bore packer, the seal assembly 10 may be used for multi-layer, perforating, and stimulation applications, or downhole annular barrier applications, among other appropriate applications.
- FIG. 2 shows a seal assembly 10 ′ according to another embodiment of the present invention.
- the seal assembly 10 ′ is a generally cylindrically shaped hollow tube having an inner diameter disposed in surrounding relation to a packer mandrel 14 of a well bore packer 12 ′.
- the seal assembly 10 ′ includes an elastomeric material portion 16 , a primary extrusion barrier 18 , and a secondary extrusion barrier 20 .
- the elastomeric material portion 16 may be composed of any material, such as any one of a variety of well known materials appropriate for creating fluid and/or pressure seals.
- a primary extrusion barrier 18 Disposed at each longitudinal end of the elastomeric material portion 16 is a primary extrusion barrier 18 .
- the primary extrusion barrier 18 reinforces the elastomeric material portion 16 to provide added structural and stability to the seal assembly 10 ′.
- the primary extrusion barrier 18 is composed of a material which is stronger or more rigid than the elastomeric material portion 16 .
- exemplary primary extrusion barrier 18 materials include coil springs, c-rings, wave springs and/or any combination thereof, among other appropriate materials.
- the secondary extrusion barrier 20 Disposed between the elastomeric material portion 16 and the primary extrusion barrier 18 is the secondary extrusion barrier 20 , the utility of which is described in detail below.
- the seal assembly 10 ′ is deformed by a mechanical, hydraulic, or electrically generated force applied at the ends of the seal assembly 10 ′.
- the elastomeric material portion 16 is constricted on its ends and forced to expand in a radial direction until it comes into contact with and sealingly engages a target seal area, such as the inner diameter of a casing segment (not shown.)
- the primary extrusion barrier 18 is also forced in the radial direction into contact with the casing segment.
- the primary extrusion barrier 18 thus positioned, prevents the elastomeric material portion 16 from extruding or extending therepast in a longitudinal direction along the inner diameter of the casing segment.
- the primary extrusion barrier 18 thus improves the sealing efficiency of the elastomeric material portion 16 with the inner diameter of the casing segment.
- the radial movement of the primary extrusion barrier 18 may create openings or expanded areas into which the elastomeric material portion 16 may extend when compressed, which if allowed to occur would cause the elastomeric material portion 16 to wear at an undesirably high rate.
- the secondary extrusion barrier 20 is disposed between the elastomeric material portion 16 and the primary extrusion barrier 18 . As with the primary extrusion barrier 18 , during the compression of the seal assembly 10 ′, the secondary extrusion barrier 20 is also forced in the radial direction into contact with the casing segment.
- the secondary extrusion barrier 20 acts as a flow barrier, which resists the flow of the heated or pressurized elastomeric material portion 16 into the primary extrusion barrier 18 .
- the secondary extrusion barrier 20 increases the life and durability of the seal assembly 10 ′ by eliminating the extrusion of the elastomeric material portion 16 into any expanded or open areas in the primary extrusion barrier 18 .
- the secondary extrusion barrier 20 is composed of a material which is more dense than the elastomeric material portion 16 .
- exemplary secondary extrusion barrier 20 materials include wire, Aramid fiber, carbon fiber, foam, or plastic, and/or any combination thereof, arranged in a mesh, wrapped, woven, or solid configuration.
- the secondary extrusion barrier 20 may be composed of any other material, arranged in any other configuration, which is suitable for preventing the extrusion of the elastomeric material portion 16 into the primary extrusion barrier 18 during compression of the seal assembly 10 ′.
- exemplary materials for the elastomeric material portion 16 include a Hydrogenated Nitrile (HNBR) elastomeric compound, a Nitrile (NBR) compound, or an Aflas compound, among other materials capable of forming an appropriate seal.
- the elastomeric material portion 16 is composed of a Hydrogenated Nitrile (HNBR) elastomeric compound
- the primary extrusion barrier 18 is composed of a looped coil spring
- the secondary extrusion barrier 20 is composed of a woven wire mesh fabric.
- the secondary extrusion barrier 20 is formed around the primary extrusion barrier 18 and the combination of the primary and secondary extrusion barriers 18 and 20 is attached to the elastomeric material portion 16 in a compression molding process.
- the extrusion barriers 18 and 20 may be placed in series with the elastomeric material portion 16 rather than being molded thereto.
- the geometry of the secondary extrusion barrier 20 is not limited to that shown in FIG. 2 . Also, in one embodiment the secondary extrusion barrier 20 completely encloses the primary extrusion barrier 18 . However, it is only necessary that the secondary extrusion barrier 20 forms a barrier between the elastomeric material portion 16 and the primary extrusion barrier 18 . Thus, although possible, is it not necessary for the secondary extrusion barrier 20 to completely enclose the primary extrusion barrier 18 .
- the seal assembly may be a one piece seal (as is shown in FIG. 2 ) or a multiple section seal (is shown in FIGS. 1 and 3 ).
- FIG. 3 shows a multiple section seal.
- the seal assembly 10 ′′ of FIG. 3 includes a first elastomeric material portion 16 ′′, and a second elastomeric material portion 22 , disposed between the first elastomeric material portion 16 ′′ and the secondary extrusion barrier 20 .
- the second elastomeric material portion 22 is composed of a harder material than the first elastomeric material portion 16 ′′.
- Exemplary materials for the elastomeric material portions 16 ′′ and 22 include a Hydrogenated Nitrile (HNBR) elastomeric compound, a Nitrile (NBR) compound, or an Aflas compound, among other materials capable of forming an appropriate seal.
- HNBR Hydrogenated Nitrile
- NBR Nitrile
- Aflas compound an aflas compound
- first elastomeric material portion 16 ′′ is composed of a Hydrogenated Nitrile (HNBR) elastomeric compound
- second elastomeric material portion 22 is also composed of a Hydrogenated Nitrile (HNBR) elastomeric compound, but one having a greater hardness than that of the first elastomeric material portion 16 ′′.
- HNBR Hydrogenated Nitrile
- FIGS. 2 and 3 each show extrusion barriers at each longitudinal end of the seal assembly, one skilled in the art will appreciate that it is only necessary for one longitudinal end of the seal assembly to include the extrusion barriers. Also, although the above description focuses on the seal assembly 10 ′ being used in combination with a well bore packer to form a seal with the inner diameter of a casing segment, one skilled in the art will appreciate that a seal assembly according to the present invention may be used on any appropriate device to form any appropriate seal.
- each of the seal assemblies described above maintains structural integrity over multiple sets and differential pressure applications, without excessive deterioration of the elastomeric portion(s) of the seal assemblies.
Abstract
A seal assembly is provided that includes an elastomeric portion; a primary extrusion barrier which reinforces the elastomeric portion; and a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
Description
- This application claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Application Ser. No. 60/715,428, filed on Sep. 9, 2005, which is incorporated herein by reference.
- The present invention relates generally to a seal assembly, such as a seal assembly for use with a well bore packing tool (commonly referred to as “packer”), and particularly to a seal assembly having an elastomeric material portion, and primary and secondary extrusion barrier portions, which reinforce the elastomeric material portion and increase the life and durability of the seal assembly.
- Seal assemblies, such as those used on well bore packers are typically cylindrically shaped structures having an inner diameter disposed in surrounding relation to a first device, such as a packer, and an outer diameter that may be forced into sealing engagement with a second device, such as an inner diameter of a casing segment.
- For such applications, seal assemblies typically include an elastomeric material portion, which may be deformed to extend radially outwardly to sealingly engage the inner diameter of the casing segment. However, during such a sealing engagement, the elastomeric material has a tendency to extrude, or extend, longitudinally along the inner diameter of the casing segment. Such a movement of the elastomeric material decreases the sealing efficiency of the elastomeric material.
- As such, some seal assemblies include an extrusion barrier disposed adjacent to the elastomeric material at the open ended portions of the seal assembly. Such extrusion barriers reinforce the elastomeric material, while preventing (or at least reducing) the extrusion of the elastomeric material longitudinally along the inner diameter of the casing segment, thus improving the sealing efficiency of the elastomeric material.
- A problem with such a configuration is that, during deformation, portions of the elastomeric material often extend into expanded areas in the extrusion barrier. For example, in instances where the extrusion barrier is a coil spring, during deformation the elastomeric material tends to extend into the expanded areas between the coils. As such, as the elastomeric material returns to its pre-deformed shape, the extrusion barrier often pulls at or pinches the elastomeric material as the elastomeric material exits the expanded areas in the extrusion barrier. This causes the elastomeric material to wear at an undesirably high rate. This type of wear is commonly associated with, but not limited to, applications which require multiple sets of a packer (i.e. when the seals of a packer are alternately sealed and unsealed multiple times) with the application of multiple high pressure differentials applied across the seal. These cyclic, loading and unloading conditions on the seal promote deterioration of the seal body.
- Accordingly, a need exists for a seal assembly having an improved extrusion barrier portion, which increases the life and durability of the seal assembly.
- In one embodiment, the present invention is a seal assembly that includes an elastomeric portion; a primary extrusion barrier which reinforces the elastomeric portion; and a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
- In another embodiment, the present invention is a seal assembly that includes an elastomeric portion; a primary extrusion barrier, which is more rigid than the elastomeric portion to reinforce the elastomeric portion; and a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier, which is more dense than the elastomeric portion to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
- In yet another embodiment, the present invention is a well bore packer that includes a packer mandrel; and either of the seal assemblies described above disposed in surrounding relation to the packer mandrel.
- These and other features and advantages of the present invention will be better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:
-
FIG. 1 is side view of an upper portion of a well bore packer having a seal assembly according to one embodiment of the present invention disposed thereon; -
FIG. 2 is a longitudinal cross-sectional view of a well bore packer having a seal assembly according to another embodiment of the present invention disposed thereon; and -
FIG. 3 is a longitudinal cross-sectional view of a well bore packer having a seal assembly according to yet another embodiment of the present invention disposed thereon. - As shown in
FIGS. 1-3 , embodiments of the present invention are directed to a seal assembly. The seal assembly includes an elastomeric material portion, and a primary extrusion barrier for reinforcing the elastomeric material portion. Disposed between the elastomeric material portion and the primary extrusion barrier is a secondary extrusion barrier. The secondary extrusion barrier prevents the elastomeric material portion from extruding, or extending, into the primary extrusion barrier during deformation of the elastomeric material portion. If the elastomeric material portion is allowed to extrude into the primary extrusion barrier, the elastomeric material portion wears at an undesirably high rate. As such, the secondary extrusion barrier increases the life and durability of the seal assembly. -
FIG. 1 shows aseal assembly 10 according to one embodiment of the present invention. Although a seal assembly according to the present invention may be used in conjunction with any appropriate device, in the depicted embodiment, the seal assembly is disposed on a well bore packer 12 (note, for clarity purposes, only the upper portion of the packer is shown.) - The
packer 12 may be any appropriate packer, such as that described in U.S. Pat. App. No. 60/652,805, entitled “Packer for Spirit Tool”, and related non-provisional filed on Aug. 26, 2005(Atty. Dk. No. 25.0316), the entire contents of which is hereby incorporated by reference. When used in combination with a well bore packer, theseal assembly 10 may be used for multi-layer, perforating, and stimulation applications, or downhole annular barrier applications, among other appropriate applications. -
FIG. 2 shows aseal assembly 10′ according to another embodiment of the present invention. As shown, theseal assembly 10′ is a generally cylindrically shaped hollow tube having an inner diameter disposed in surrounding relation to apacker mandrel 14 of a wellbore packer 12′. - In the depicted embodiment, the
seal assembly 10′ includes anelastomeric material portion 16, aprimary extrusion barrier 18, and asecondary extrusion barrier 20. Theelastomeric material portion 16 may be composed of any material, such as any one of a variety of well known materials appropriate for creating fluid and/or pressure seals. - Disposed at each longitudinal end of the
elastomeric material portion 16 is aprimary extrusion barrier 18. Theprimary extrusion barrier 18 reinforces theelastomeric material portion 16 to provide added structural and stability to theseal assembly 10′. As such, in one embodiment theprimary extrusion barrier 18 is composed of a material which is stronger or more rigid than theelastomeric material portion 16. For example, exemplaryprimary extrusion barrier 18 materials include coil springs, c-rings, wave springs and/or any combination thereof, among other appropriate materials. Disposed between theelastomeric material portion 16 and theprimary extrusion barrier 18 is thesecondary extrusion barrier 20, the utility of which is described in detail below. - In one embodiment, the
seal assembly 10′ is deformed by a mechanical, hydraulic, or electrically generated force applied at the ends of theseal assembly 10′. As theseal assembly 10′ is compressed in this manner, theelastomeric material portion 16 is constricted on its ends and forced to expand in a radial direction until it comes into contact with and sealingly engages a target seal area, such as the inner diameter of a casing segment (not shown.) - During this compression, the
primary extrusion barrier 18 is also forced in the radial direction into contact with the casing segment. Theprimary extrusion barrier 18, thus positioned, prevents theelastomeric material portion 16 from extruding or extending therepast in a longitudinal direction along the inner diameter of the casing segment. Theprimary extrusion barrier 18 thus improves the sealing efficiency of theelastomeric material portion 16 with the inner diameter of the casing segment. - However, as described above, the radial movement of the
primary extrusion barrier 18 may create openings or expanded areas into which theelastomeric material portion 16 may extend when compressed, which if allowed to occur would cause theelastomeric material portion 16 to wear at an undesirably high rate. To alleviate this problem, thesecondary extrusion barrier 20 is disposed between theelastomeric material portion 16 and theprimary extrusion barrier 18. As with theprimary extrusion barrier 18, during the compression of theseal assembly 10′, thesecondary extrusion barrier 20 is also forced in the radial direction into contact with the casing segment. - Thus positioned, the
secondary extrusion barrier 20 acts as a flow barrier, which resists the flow of the heated or pressurizedelastomeric material portion 16 into theprimary extrusion barrier 18. As a result, thesecondary extrusion barrier 20 increases the life and durability of theseal assembly 10′ by eliminating the extrusion of theelastomeric material portion 16 into any expanded or open areas in theprimary extrusion barrier 18. - In order to prevent the flow of the
elastomeric material portion 16 into the expanded or open areas in theprimary extrusion barrier 18, in one embodiment thesecondary extrusion barrier 20 is composed of a material which is more dense than theelastomeric material portion 16. For example, exemplarysecondary extrusion barrier 20 materials include wire, Aramid fiber, carbon fiber, foam, or plastic, and/or any combination thereof, arranged in a mesh, wrapped, woven, or solid configuration. - Alternatively, the
secondary extrusion barrier 20 may be composed of any other material, arranged in any other configuration, which is suitable for preventing the extrusion of theelastomeric material portion 16 into theprimary extrusion barrier 18 during compression of theseal assembly 10′. Exemplary materials for theelastomeric material portion 16 include a Hydrogenated Nitrile (HNBR) elastomeric compound, a Nitrile (NBR) compound, or an Aflas compound, among other materials capable of forming an appropriate seal. - In one embodiment, the
elastomeric material portion 16 is composed of a Hydrogenated Nitrile (HNBR) elastomeric compound, theprimary extrusion barrier 18 is composed of a looped coil spring, and thesecondary extrusion barrier 20 is composed of a woven wire mesh fabric. - In one embodiment, the
secondary extrusion barrier 20 is formed around theprimary extrusion barrier 18 and the combination of the primary andsecondary extrusion barriers elastomeric material portion 16 in a compression molding process. In an alternative embodiment, theextrusion barriers elastomeric material portion 16 rather than being molded thereto. - The geometry of the
secondary extrusion barrier 20 is not limited to that shown inFIG. 2 . Also, in one embodiment thesecondary extrusion barrier 20 completely encloses theprimary extrusion barrier 18. However, it is only necessary that thesecondary extrusion barrier 20 forms a barrier between theelastomeric material portion 16 and theprimary extrusion barrier 18. Thus, although possible, is it not necessary for thesecondary extrusion barrier 20 to completely enclose theprimary extrusion barrier 18. - The seal assembly may be a one piece seal (as is shown in
FIG. 2 ) or a multiple section seal (is shown inFIGS. 1 and 3 ).FIG. 3 shows a multiple section seal. However, the descriptions and variations described above with respect toFIG. 2 apply toFIG. 3 . As such, in order to avoid duplicity, only the differences betweenFIGS. 2 and 3 are discussed herein. For instance, theseal assembly 10″ ofFIG. 3 includes a firstelastomeric material portion 16″, and a secondelastomeric material portion 22, disposed between the firstelastomeric material portion 16″ and thesecondary extrusion barrier 20. In one embodiment the secondelastomeric material portion 22 is composed of a harder material than the firstelastomeric material portion 16″. - Exemplary materials for the
elastomeric material portions 16″ and 22 include a Hydrogenated Nitrile (HNBR) elastomeric compound, a Nitrile (NBR) compound, or an Aflas compound, among other materials capable of forming an appropriate seal. - In one embodiment the first
elastomeric material portion 16″ is composed of a Hydrogenated Nitrile (HNBR) elastomeric compound, and the secondelastomeric material portion 22 is also composed of a Hydrogenated Nitrile (HNBR) elastomeric compound, but one having a greater hardness than that of the firstelastomeric material portion 16″. - Although
FIGS. 2 and 3 each show extrusion barriers at each longitudinal end of the seal assembly, one skilled in the art will appreciate that it is only necessary for one longitudinal end of the seal assembly to include the extrusion barriers. Also, although the above description focuses on theseal assembly 10′ being used in combination with a well bore packer to form a seal with the inner diameter of a casing segment, one skilled in the art will appreciate that a seal assembly according to the present invention may be used on any appropriate device to form any appropriate seal. - It is to be noted that each of the seal assemblies described above maintains structural integrity over multiple sets and differential pressure applications, without excessive deterioration of the elastomeric portion(s) of the seal assemblies.
- The preceding description has been presented with reference to presently preferred embodiments of the invention. Persons skilled in the art and technology to which this invention pertains will appreciate that alterations and changes in the described structures and methods of operation can be practiced without meaningfully departing from the principle, spirit and scope of this invention. Accordingly, the foregoing description should not be read as pertaining only to the precise structures described and shown in the accompanying drawings, but rather should be read as consistent with and as support for the following claims, which are to have their fullest and fairest scope.
Claims (23)
1. A seal assembly comprising:
an elastomeric portion;
a primary extrusion barrier which reinforces the elastomeric portion; and
a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
2. The seal assembly of claim 1 , wherein the primary extrusion barrier is more rigid than the elastomeric portion.
3. The seal assembly of claim 2 , wherein the primary extrusion barrier comprises a material chosen from the group consisting of coil springs, c-rings, and wave springs.
4. The seal assembly of claim 1 , wherein the secondary extrusion barrier is more dense than the elastomeric portion.
5. The seal assembly of claim 4 , wherein the secondary extrusion barrier comprises a material chosen from the group consisting of wire, Aramid fiber, carbon fiber, foam, and plastic.
6. The seal assembly of claim 5 , wherein the secondary extrusion barrier material comprises a configuration chosen from the group consisting of mesh, wrapped, woven, and solid.
7. The seal assembly of claim 1 , wherein the primary extrusion barrier comprises a coil spring, and the secondary extrusion barrier comprises a woven wire mesh fabric.
8. The seal assembly of claim 7 , wherein the elastomeric portion comprises a material chosen from the group consisting of a Hydrogenated Nitrile compound, a Nitrile compound, and an Aflas compound.
9. The seal assembly of claim 1 , wherein the elastomeric portion is a first elastomeric portion, and wherein the seal assembly further comprises a second elastomeric portion, which is adjacent to the first elastomeric portion.
10. A seal assembly comprising:
an elastomeric portion;
a primary extrusion barrier, which is more rigid than the elastomeric portion to reinforce the elastomeric portion; and
a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier, which is more dense than the elastomeric portion to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
11. The seal assembly of claim 10 , wherein the secondary extrusion barrier comprises a material chosen from the group consisting of wire, Aramid fiber, carbon fiber, foam, and plastic.
12. The seal assembly of claim 11 , wherein the secondary extrusion barrier material comprises a configuration chosen from the group consisting of mesh, wrapped, woven, and solid.
13. The seal assembly of claim 11 , wherein the primary extrusion barrier comprises a material chosen from the group consisting of coil springs, c-rings, and wave springs.
14. The seal assembly of claim 10 , wherein the primary extrusion barrier comprises a coil spring, and the secondary extrusion barrier comprises a woven wire mesh fabric.
15. The seal assembly of claim 14 , wherein the elastomeric portion comprises a material chosen from the group consisting of a Hydrogenated Nitrile compound, a Nitrile compound, and an Aflas compound.
16. The seal assembly of claim 10 , wherein the elastomeric portion is a first elastomeric portion, and wherein the seal assembly further comprises a second elastomeric portion, which is adjacent to the first elastomeric portion.
17. A well bore packer comprising:
a packer mandrel; and
a seal assembly disposed in surrounding relation to the packer mandrel, wherein the seal assembly comprises:
an elastomeric portion,
a primary extrusion barrier, which is more rigid than the elastomeric portion to reinforce the elastomeric portion, and
a secondary extrusion barrier disposed between the elastomeric portion and the primary extrusion barrier, which is more dense than the elastomeric portion to prevent entry of the elastomeric portion into open areas in the primary extrusion barrier.
18. The seal assembly of claim 17 , wherein the secondary extrusion barrier comprises a material chosen from the group consisting of wire, Aramid fiber, carbon fiber, foam, and plastic.
19. The seal assembly of claim 18 , wherein the secondary extrusion barrier material comprises a configuration chosen from the group consisting of mesh, wrapped, woven, and solid.
20. The seal assembly of claim 18 , wherein the primary extrusion barrier comprises a material chosen from the group consisting of coil springs, c-rings, and wave springs.
21. The seal assembly of claim 17 , wherein the primary extrusion barrier comprises a coil spring, and the secondary extrusion barrier comprises a woven wire mesh fabric.
22. The seal assembly of claim 21 , wherein the elastomeric portion comprises a material chosen from the group consisting of a Hydrogenated Nitrile compound, a Nitrile compound, and an Aflas compound.
23. The seal assembly of claim 17 , wherein the elastomeric portion is a first elastomeric portion, and wherein the seal assembly further comprises a second elastomeric portion, which is adjacent to the first elastomeric portion.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US11/363,783 US20070056725A1 (en) | 2005-09-09 | 2006-02-28 | Seal assembly |
ARP060103925A AR057121A1 (en) | 2005-09-09 | 2006-09-08 | SEALING ASSEMBLIES |
PCT/IB2006/053191 WO2007029214A2 (en) | 2005-09-09 | 2006-09-08 | Seal assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US71542805P | 2005-09-09 | 2005-09-09 | |
US11/363,783 US20070056725A1 (en) | 2005-09-09 | 2006-02-28 | Seal assembly |
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Publication Number | Publication Date |
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US20070056725A1 true US20070056725A1 (en) | 2007-03-15 |
Family
ID=37836244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/363,783 Abandoned US20070056725A1 (en) | 2005-09-09 | 2006-02-28 | Seal assembly |
Country Status (3)
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US (1) | US20070056725A1 (en) |
AR (1) | AR057121A1 (en) |
WO (1) | WO2007029214A2 (en) |
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US20070227725A1 (en) * | 2006-03-29 | 2007-10-04 | Xu Zheng R | Packer cup systems for use inside a wellbore |
US20100038074A1 (en) * | 2008-08-15 | 2010-02-18 | Schlumberger Technology Corporation | Anti-extrusion device for swell rubber packer |
US20110247835A1 (en) * | 2010-04-12 | 2011-10-13 | Halliburton Energy Services, Inc. | Sequenced packing element system |
US20120006530A1 (en) * | 2010-07-06 | 2012-01-12 | Halliburton Energy Services, Inc. | Packing element system with profiled surface |
US20120119445A1 (en) * | 2010-11-16 | 2012-05-17 | Castillo Robert O | Sealing devices having a non-elastomeric fibrous sealing material and methods of using same |
US20120126482A1 (en) * | 2009-06-10 | 2012-05-24 | Interwell Technology As | Tube sealing device and a sealing element for such a device |
US8393388B2 (en) | 2010-08-16 | 2013-03-12 | Baker Hughes Incorporated | Retractable petal collet backup for a subterranean seal |
CN103206188A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Isolation packer |
US8839874B2 (en) | 2012-05-15 | 2014-09-23 | Baker Hughes Incorporated | Packing element backup system |
US8905149B2 (en) | 2011-06-08 | 2014-12-09 | Baker Hughes Incorporated | Expandable seal with conforming ribs |
US8955606B2 (en) | 2011-06-03 | 2015-02-17 | Baker Hughes Incorporated | Sealing devices for sealing inner wall surfaces of a wellbore and methods of installing same in a wellbore |
US20150129242A1 (en) * | 2013-05-02 | 2015-05-14 | Halliburton Energy Services, Inc. | Sealing annular gaps in a well |
CN104912513A (en) * | 2015-05-25 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Spring type shoulder protector high-temperature and high-pressure expansion type packer rubber tube |
US9243490B2 (en) | 2012-12-19 | 2016-01-26 | Baker Hughes Incorporated | Electronically set and retrievable isolation devices for wellbores and methods thereof |
EP3042033A1 (en) * | 2013-11-06 | 2016-07-13 | Halliburton Energy Services, Inc. | Swellable seal with backup |
US10253605B2 (en) | 2012-08-27 | 2019-04-09 | Halliburton Energy Services, Inc. | Constructed annular safety valve element package |
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GB2539259A (en) * | 2015-06-12 | 2016-12-14 | Rubberatkins Ltd | Improved sealing apparatus |
CN109751010B (en) * | 2017-11-06 | 2021-05-11 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Packer (CN) |
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US8397803B2 (en) * | 2010-07-06 | 2013-03-19 | Halliburton Energy Services, Inc. | Packing element system with profiled surface |
US20120006530A1 (en) * | 2010-07-06 | 2012-01-12 | Halliburton Energy Services, Inc. | Packing element system with profiled surface |
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US9429236B2 (en) * | 2010-11-16 | 2016-08-30 | Baker Hughes Incorporated | Sealing devices having a non-elastomeric fibrous sealing material and methods of using same |
US8955606B2 (en) | 2011-06-03 | 2015-02-17 | Baker Hughes Incorporated | Sealing devices for sealing inner wall surfaces of a wellbore and methods of installing same in a wellbore |
US8905149B2 (en) | 2011-06-08 | 2014-12-09 | Baker Hughes Incorporated | Expandable seal with conforming ribs |
US8839874B2 (en) | 2012-05-15 | 2014-09-23 | Baker Hughes Incorporated | Packing element backup system |
US10577889B2 (en) | 2012-08-27 | 2020-03-03 | Halliburton Energy Services, Inc. | Constructed annular safety valve element package |
US10253605B2 (en) | 2012-08-27 | 2019-04-09 | Halliburton Energy Services, Inc. | Constructed annular safety valve element package |
US9243490B2 (en) | 2012-12-19 | 2016-01-26 | Baker Hughes Incorporated | Electronically set and retrievable isolation devices for wellbores and methods thereof |
CN103206188A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Isolation packer |
US9145755B2 (en) * | 2013-05-02 | 2015-09-29 | Halliburton Energy Services, Inc. | Sealing annular gaps in a well |
US20150129242A1 (en) * | 2013-05-02 | 2015-05-14 | Halliburton Energy Services, Inc. | Sealing annular gaps in a well |
EP3042033A1 (en) * | 2013-11-06 | 2016-07-13 | Halliburton Energy Services, Inc. | Swellable seal with backup |
EP3042033A4 (en) * | 2013-11-06 | 2017-05-17 | Halliburton Energy Services, Inc. | Swellable seal with backup |
CN104912513A (en) * | 2015-05-25 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Spring type shoulder protector high-temperature and high-pressure expansion type packer rubber tube |
Also Published As
Publication number | Publication date |
---|---|
WO2007029214A3 (en) | 2007-08-02 |
AR057121A1 (en) | 2007-11-14 |
WO2007029214A2 (en) | 2007-03-15 |
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Owner name: SCHLUMBERGER TECHNOLOGY CORPORATION, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LUCAS, CHAD;RODRIGUEZ, OSCAR;HENDRICKSON, JAMES D.;AND OTHERS;REEL/FRAME:017561/0901;SIGNING DATES FROM 20060405 TO 20060425 |
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