COMPLETION ISOLATION SYSTEM WITH TUBING MOVEMENT COMPENSATOR

Abstract

A system includes a tubular disposed within a borehole, a sleeve disposed around the tubular, and an isolation element bounded to an outer diameter of the sleeve. The inner diameter of the sleeve is connected to an outer diameter of the tubular via a plurality of seals. The isolation element is configured to conform to a surface of the borehole when the isolation element is in an expanded configuration. The sleeve compensates for movement of the tubular by being able to freely move across the tubular.

Description

BACKGROUND

Open hole completions are widely used with various techniques including open hole gravel packing, standalone screens, slotted liners, perforated pipes, or expandable screens. Cased hole completions are also widely used. For reservoir management, isolation packers may be included in completion systems to isolate two or more zones of the wellbore. An effective isolation between zones requires a mechanical bond between the element and the tubular and a bond between the borehole surface and the element. However, movement of the tubular due to temperature or pressure changes downhole may compromise the bond between the borehole surface and the element, and may even cause the element to damage the borehole surface.

SUMMARY

A system according to one or more embodiments of the present disclosure includes a tubular disposed within a borehole, a sleeve disposed around the tubular, and an isolation element bonded to an outer diameter of the sleeve. In one or more embodiments of the present disclosure, an inner diameter of the sleeve is connected to an outer diameter of the tubular via a plurality of seals. In one or more embodiments of the present disclosure, the isolation element is configured to conform to a surface of the borehole when the isolation element is in an expanded configuration. According to one or more embodiments of the present disclosure, the sleeve compensates for movement of the tubular by being able to freely move across the tubular.

A method according to one or more embodiments of the present disclosure includes deploying a completion system into a wellbore, the completion system including: a tubular, a sleeve disposed around the tubular, and an isolation element bonded to an outer diameter of the sleeve. In one or more embodiments of the present disclosure, an inner diameter of the sleeve is connected to an outer diameter of the tubular via a plurality of seals. In one or more embodiments of the present disclosure, the isolation element is in an unexpanded configuration during the deploying step. The method according to one or more embodiments of the present disclosure also includes actuating the isolation element such that the isolation element conforms to a surface of the borehole in an expanded configuration, and maintaining an integrity of a first bond between the isolation element and the outer diameter of the sleeve, and a second bond between the isolation element in the expanded configuration and the surface of the borehole by allowing the sleeve to freely move across the tubular.

However, many modifications are possible without materially departing from the teachings of this disclosure. Accordingly, such modifications are intended to be included within the scope of this disclosure as defined in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Certain embodiments of the disclosure will hereafter be described with reference to the accompanying drawings, wherein like reference numerals denote like elements. It should be understood, however, that the accompanying figures illustrate the various implementations described herein and are not meant to limit the scope of various technologies described herein, and:

FIG. 1 shows a completion isolation system, according to one or more embodiments of the present disclosure; and

FIG. 2 shows another completion isolation system, according to one or more embodiments of the present disclosure.

DETAILED DESCRIPTION

In the following description, numerous details are set forth to provide an understanding of some embodiments of the present disclosure. However, it will be understood by those of ordinary skill in the art that the system and/or methodology may be practiced without these details and that numerous variations or modifications from the described embodiments may be possible.

In the specification and appended claims: the terms “up” and “down,” “upper” and “lower,” “upwardly” and “downwardly,” “upstream” and “downstream,” “uphole” and “downhole,” “above” and “below,” “top” and “bottom,” “left” and “right,” and other like terms indicating relative positions above or below a given point or element are used in this description to more clearly describe some embodiments of the disclosure.

The present disclosure generally relates to completion isolation applications. More specifically, one or more embodiments of the present disclosure relates to a completion isolation system that includes an isolation element bonded to a movable sleeve that is connected to a tubular for completion isolation applications, which may include, for example, isolating a non-producing zone, controlling the production or injection from each zone, or isolating a zone producing an unwanted fluid (e.g., water or gas for an oil producing well). Advantageously, allowing free movement of the sleeve compensates for undesirable movement of the tubular, due to temperature and pressure fluctuations, for example. Due to this configuration according to one or more embodiments of the present disclosure, the integrity of the seals between the borehole surface and the isolation element (in open hole applications) or between the casing surface and the isolation element (in cased hole applications), and between the tubular and the isolation element via the sleeve, are not compromised, thereby improving the effectiveness of isolation between zones within the completion system.

Referring now to FIG. 1, a completion isolation system according to one or more embodiments of the present disclosure is shown. As shown in FIG. 1, the system 10 may include a tubular 12 disposed within a bore hole 14, and a sleeve 16 disposed around the tubular 12. According to one or more embodiments of the present disclosure, the tubular 12 and the sleeve 16 may be arranged so as to create annular spaces 28 between an outer diameter 20 of the tubular 12 and an inner diameter 18 of the sleeve 16. Further, in one or more embodiments of the present disclosure, the inner diameter 18 of the sleeve 16 may be connected to the outer diameter 20 of the tubular 12 via a plurality of seals 22a. As shown in FIG. 1, for example, the plurality of seals 22a may include a series of bonded seals (or o-rings) fixed to the outer diameter 20 of the tubular 12 and disposed in the annular spaces 28 between the outer diameter 20 of the tubular 12 and the inner diameter 18 of the sleeve 16. While three bonded seals 22a are shown disposed in the annular spaces 28 of FIG. 1, the amount of bonded seals in the plurality of seals 22a is not limiting, and any amount of bonded seals is contemplated and within the scope of the present disclosure.

As further shown in FIG. 1, the system 10 may also include an isolation element 24 bonded to an outer diameter 26 of the sleeve 16, according to one or more embodiments of the present disclosure. The isolation element 24 according to one or more embodiments of the present disclosure may include at least one of an elastomeric element, a swellable element, a mechanical packer, and a hydraulically set packer, for example. The isolation element 24, as a component of the completion system 10 according to one or more embodiments of the present disclosure, may assume an unexpanded configuration as the system 10 is deployed into a wellbore. In one or more embodiments of the present disclosure, ends rings with corresponding shear pins (not shown) may be added to the ends of the sleeve 16 to prevent the sleeve 16 from moving during deployment. Once the shear pins are sheared by achieving the requisite tension on the sleeve 16, free movement of the sleeve 16, as further described below, may be achieved. After deployment, and once the system 10 reaches a desired location within the wellbore, the isolation element 24 may be actuated into an expanded configuration such that the isolation element 24 conforms to a surface of the bore hole 14. Therefore, the completion system 10 according to one or more embodiments of the present disclosure includes a first bond 32 between the isolation element 24 and the outer diameter 26 of the sleeve 16, and a second bond 34 between the isolation element 24 in the expanded configuration and the surface of the bore hole 14.

In one or more embodiments of the present disclosure, actuation of the isolation element 24 from the unexpanded configuration to the expanded configuration may occur hydraulically, electrically, remotely, wirelessly, mechanically, chemically, via pressure, or magnetically, for example. Once the isolation element 24 is in the expanded configuration, completion isolation applications, such as controlling the production or injection from a given zone, isolating a non-producing zone, or isolating a zone that is producing an unwanted fluid (e.g., water or gas for an oil producing well), for example, may proceed in the wellbore.

During completion isolation operations, and otherwise while the completion system 10 is disposed in the wellbore, the tubular 12 may be exposed to temperature and/or pressure fluctuations that may cause the tubular 12 to undesirably move. Advantageously, in the system 10 according to one or more embodiments of the present disclosure, the sleeve 16 compensates for this movement of the tubular 12 by being able to freely move across the tubular 12. In this way, the sleeve 16 is able to maintain the integrity of the first bond 32 between the isolation element 24 and the outer diameter 26 of the sleeve 16, and the second bond 34 between the isolation element 24 in the expanded configuration and the surface of the bore hole 14 by allowing the sleeve 16 to freely move across the tubular 12. As shown in FIG. 1, for example, the inner diameter 18 of the sleeve 16 may be polished, which facilitates free movement of the sleeve 16 across the tubular 12, according to one or more embodiments of the present disclosure.

As further shown in FIG. 1, the system 10 may include at least one debris seal 30 attached to an end of the sleeve 16 and the outer diameter 20 of the tubular 12. In one or more embodiments of the present disclosure, placement of the at least one debris seal 30 in this way minimizes debris from entering the annular spaces 28 between the outer diameter 20 of the tubular 12 and the inner diameter 18 of the sleeve 16.

Referring now to FIG. 2, another completion isolation system according to one or more embodiments of the present disclosure is shown. Only the key differences between FIG. 2 and FIG. 1, as previously described, will be provided here. Like elements between FIG. 2 and FIG. 1 are associated with the same reference numeral to facilitate clarity. As shown in FIG. 2, in one or more embodiments of the present disclosure, the inner diameter 18 of the sleeve 16 may be connected to the outer diameter 20 of the tubular 12 via a plurality of seals 22b. As shown in FIG. 2, for example, the plurality of seals 22b may include a series of bonded seals (or o-rings) fixed to the inner diameter 18 of the sleeve 16 and disposed in the annular spaces 28 between the outer diameter 20 of the tubular 12 and the inner diameter 18 of the sleeve 16. While two bonded seals 22b are shown disposed in the annular spaces 28 of FIG. 2, the amount of bonded seals in the plurality of seals 22a is not limiting, and any amount of bonded seals is contemplated and within the scope of the present disclosure.

Similar to the completion system 10 described with respect to FIG. 1, the sleeve 16 of the system 10 of FIG. 2 compensates for undesirable movement of the tubular 12 by being able to move across the tubular 12. As shown in FIG. 2, in one or more embodiments of the present disclosure, at least a portion of the outer diameter 20 of the tubular 12 may be polished, which facilitates free movement of the sleeve 16 across the tubular 12. Specifically, in one or more embodiments of the present disclosure, the portion of the outer diameter 20 of the tubular 12 that coincides with the annular space 28 may be polished, as shown in FIG. 2, for example.

While the aforementioned embodiments of the present disclosure in view of FIGS. 1 and 2 are may describe an open hole completion isolation system, one or more embodiments of the present disclosure may also be applicable to cased hole completion isolation systems, where the aforementioned borehole surface is a surface of a casing or other metallic tubular, without departing from the scope of the present disclosure.

Although a few embodiments of the disclosure have been described in detail above, those of ordinary skill in the art will readily appreciate that many modifications are possible without materially departing from the teachings of this disclosure. Accordingly, such modifications are intended to be included within the scope of this disclosure as defined in the claims.

Claims

1. A system, comprising: a tubular disposed within a borehole;a sleeve disposed around the tubular, an inner diameter of the sleeve being connected to an outer diameter of the tubular via a plurality of seals; andan isolation element bonded to an outer diameter of the sleeve, the isolation element configured to conform to a surface of the borehole when the isolation element is in an expanded configuration,wherein the sleeve compensates for movement of the tubular by being able to freely move across the tubular.

2. The system of claim 1, wherein the plurality of seals comprises a series of bonded seals fixed to the outer diameter of the tubular and disposed in annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

3. The system of claim 2, wherein the inner diameter of the sleeve is polished, which facilitates free movement of the sleeve across the tubular.

4. The system of claim 2, wherein the plurality of seals further comprises at least one debris seal attached to an end of the sleeve and the outer diameter of the tubular, which minimizes debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

5. The system of claim 3, wherein the plurality of seals further comprises at least one debris seal attached to an end of the sleeve and the outer diameter of the tubular, which minimizes debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

6. The system of claim 1, wherein the plurality of seals comprises a series of bonded seals fixed to the inner diameter of the sleeve and disposed in annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

7. The system of claim 6, wherein at least a portion of the outer diameter of the tubular is polished, which facilitates free movement of the sleeve across the tubular.

8. The system of claim 6, wherein the plurality of seals further comprises at least one debris seal attached to an end of the sleeve and the outer diameter of the tubular, which minimizes debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

9. The system of claim 7, wherein the plurality of seals further comprises at least one debris seal attached to an end of the sleeve and the outer diameter of the tubular, which minimizes debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

10. The system of claim 1, wherein the isolation element comprises at least one selected from the group consisting of: an elastomeric element; a swellable element; a mechanical packer; and a hydraulically set packer.

11. A method, comprising: deploying a completion system into a wellbore, the completion system comprising: a tubular;a sleeve disposed around the tubular, an inner diameter of the sleeve being connected to an outer diameter of the tubular via a plurality of seals; andan isolation element bonded to an outer diameter of the sleeve,wherein, during the deploying step, the isolation element is in an unexpanded configuration;actuating the isolation element such that the isolation element conforms to a surface of the borehole in an expanded configuration; andmaintaining an integrity of a first bond between the isolation element and the outer diameter of the sleeve, and a second bond between the isolation element in the expanded configuration and the surface of the borehole by allowing the sleeve to freely move across the tubular.

12. The method of claim 11, further comprising: performing a completion isolation application after the actuating step.

13. The method of claim 11, wherein the plurality of seals comprises a series of bonded seals fixed to the outer diameter of the tubular and disposed in annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

14. The method of claim 13, wherein the inner diameter of the sleeve is polished, which facilitates free movement of the sleeve across the tubular.

15. The method of claim 13, further comprising: minimizing debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

16. The method of claim 14, further comprising: minimizing debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

17. The method of claim 11, wherein the plurality of seals comprises a series of bonded seals fixed to the inner diameter of the sleeve and disposed in annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

18. The method of claim 17, wherein at least a portion of the outer diameter of the tubular is polished, which facilitates free movement of the sleeve across the tubular.

19. The method of claim 17, further comprising: minimizing debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.

20. The method of claim 18, further comprising: minimizing debris from entering the annular spaces between the outer diameter of the tubular and the inner diameter of the sleeve.