Abstract: The present invention relates to a downhole expandable metal tubular to be expanded in a well downhole from a first outer diameter to a second outer diameter to abut against an inner face of a casing or borehole, the downhole expandable metal tubular having an outer tubular face and a longitudinal extension and comprising a first circumferential edge and a second circumferential edge provided on the outer tubular face and having a distance along the longitudinal extension, and a circumferential sealing element being arranged between the circumferential edges, wherein the downhole expandable metal tubular further comprises: a circumferential resilient element having an outer face part facing away from the outer tubular face and having an extension along the longitudinal extension, the extension of the circumferential resilient element being smaller than the distance, a space arranged adjacent to the circumferential resilient element in the longitudinal extension, and a first portion of the circumferential sealing element at least partly overlapping the outer face part of the circumferential resilient element, the circumferential resilient element arranged between the portion of the circumferential sealing element and the outer tubular face. Furthermore, the present invention relates to an annular barrier, to a downhole completion system and to a sealing method.
Amended claims for NPE
1. A downhole expandable metal tubular (1) to be expanded in a well (2) downhole from a first outer diameter (Di) to a second outer diameter (D2) to 5 abut against an inner face (12) of a casing (3) or borehole (4), the downhole expandable metal tubular having an outer tubular face (5) and a longitudinal extension (L) and comprising:
- a first circumferential edge (6) and a second circumferential edge (7) provided
on the outer tubular face and having a distance (d) along the longitudinal
10 extension, and
- a circumferential sealing element (8) arranged between the circumferential
edges,
wherein the downhole expandable metal tubular further comprises: a circumferential resilient element (9) having an outer face part (10) facing 15 away from the outer tubular face and having an extension (Ei, E2) along the longitudinal extension, the extension of the circumferential resilient element being smaller than the distance,
- a space (11) arranged adjacent to the circumferential resilient element in the
longitudinal extension, and
20 - a first portion (14, 14A) of the circumferential sealing element at least partly overlapping the outer face part of the circumferential resilient element, the circumferential resilient element being arranged between the portion of the circumferential sealing element and the outer tubular face.
25 2. A downhole expandable metal tubular according to claim 1, wherein the circumferential sealing element has one or more recess(es) (29) in which the circumferential resilient element is arranged.
3. A downhole expandable metal tubular according to claim 1 or 2, wherein
30 the circumferential sealing element comprises a second portion (14B), the second
portion and the first portion defining the recess in which the circumferential resilient element is arranged.
4. A downhole expandable metal tubular according to claim 3, wherein the
35 second portion has a first portion thickness (t2), the first portion thickness being
greater than a height of the circumferential resilient element.
5. A downhole expandable metal tubular according to claim 4, wherein first
the portion (14) of the circumferential sealing element has a second portion
thickness (t2), the first portion thickness of the second portion being greater than
the second portion thickness of the portion.
5
6. A downhole expandable metal tubular according to any of claims 1-5,
wherein the circumferential resilient element is more resilient than the
circumferential sealing element.
10 7. A downhole expandable metal tubular according to any of claims 1-6, wherein the circumferential sealing element is a first circumferential sealing element and the downhole expandable metal tubular comprises a second circumferential sealing element (8, 8B).
15 8. A downhole expandable metal tubular according to any of claims 1-7, wherein the circumferential resilient element is a first circumferential resilient element and the downhole expandable metal tubular comprises a second circumferential resilient element.
20 9. A downhole expandable metal tubular according to any of claims 1-8, wherein the circumferential resilient element is a coiled spring.
10. A downhole expandable metal tubular according to any of claims 1-9,
wherein a split, ring-shaped retaining element (30) is arranged between the first
25 circumferential edge and/or the second circumferential edge and the circumferential sealing element (8), the split, ring-shaped retaining element forming a back-up for the circumferential sealing element, and wherein the split, ring-shaped retaining element has more than one winding, so that when the expandable metal tubular is expanded from the first outer
30 diameter to the second outer diameter, the split, ring-shaped retaining element partly unwinds.
11. A downhole expandable metal tubular according to claim 10, wherein the
split, ring-shaped retaining element unwinds by less than one winding when the
35 expandable metal tubular is expanded from the first outer diameter to the second outer diameter.
12. An annular barrier (20) to be expanded in an annulus (21) between a well
tubular structure (3) and an inner face (12) of a borehole (4) or a casing (3)
downhole for providing zone isolation between a first zone (101) and a second
zone (102) of the borehole, comprising:
5 - a tubular metal part (27) for mounting as part of the well tubular structure,
- a downhole expandable metal tubular (1) according to any of the preceding
claims, surrounding the tubular metal part and having an outer tubular face (5)
facing towards the inner face (12) of the borehole or the casing, each end of the
downhole expandable metal tubular being connected with the tubular metal part,
10 and
- an expansion space (37) between the downhole expandable metal tubular and
the tubular metal part.
13. A downhole completion (100) comprising a downhole expandable metal
15 tubular (1) according to any of claims 1-11 and a casing (3) having an inner face
(12) against which at least part of the downhole expandable metal tubular is expanded.
14. A downhole completion (100) comprising a well tubular structure and an
20 annular barrier (20) according to claim 13, where the tubular metal part of the
annular barrier is mounted as part of the well tubular structure.
15. A sealing method comprising:
- providing a downhole expandable metal tubular (1) according to any of claims
25 1-11,
- expanding the downhole expandable metal tubular from a first outer diameter
(Di) to a second outer diameter (D2) to abut against an inner face (12) of a
casing (3) or borehole (4),
- maintaining expansion of the downhole expandable metal tubular so that the
30 portion of the circumferential sealing element at least partly overlapping the
circumferential resilient element presses on the outer face part of the circumferential resilient element so that it deforms into the space adjacent to the circumferential resilient element, and
- releasing expansion so that the downhole expandable metal tubular springs
35 slightly back, causing the pressure on the portion to be released so that the
circumferential resilient element, due to its resilient character, is able to return to its previous form and thereby press the portion of the circumferential sealing
element to abut against the inner face of the casing or borehole for enhanced sealing therebetween.
| # | Name | Date |
|---|---|---|
| 1 | 201747043863-FER.pdf | 2021-10-17 |
| 1 | 201747043863-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [07-12-2017(online)].pdf | 2017-12-07 |
| 2 | 201747043863-FORM 18 [18-06-2019(online)].pdf | 2019-06-18 |
| 2 | 201747043863-STATEMENT OF UNDERTAKING (FORM 3) [07-12-2017(online)].pdf | 2017-12-07 |
| 3 | 201747043863-PROOF OF RIGHT [07-12-2017(online)].pdf | 2017-12-07 |
| 3 | 201747043863-FORM 3 [06-05-2019(online)].pdf | 2019-05-06 |
| 4 | 201747043863-PRIORITY DOCUMENTS [07-12-2017(online)].pdf | 2017-12-07 |
| 4 | 201747043863-FORM 13 [09-04-2019(online)].pdf | 2019-04-09 |
| 5 | 201747043863-RELEVANT DOCUMENTS [09-04-2019(online)].pdf | 2019-04-09 |
| 5 | 201747043863-POWER OF AUTHORITY [07-12-2017(online)].pdf | 2017-12-07 |
| 6 | Correspondence by Agent_Assignment,Form26_13-11-2018.pdf | 2018-11-13 |
| 6 | 201747043863-FORM 1 [07-12-2017(online)].pdf | 2017-12-07 |
| 7 | 201747043863-DRAWINGS [07-12-2017(online)].pdf | 2017-12-07 |
| 7 | 201747043863-8(i)-Substitution-Change Of Applicant - Form 6 [09-11-2018(online)].pdf | 2018-11-09 |
| 8 | 201747043863-DECLARATION OF INVENTORSHIP (FORM 5) [07-12-2017(online)].pdf | 2017-12-07 |
| 8 | 201747043863-ASSIGNMENT DOCUMENTS [09-11-2018(online)].pdf | 2018-11-09 |
| 9 | 201747043863-COMPLETE SPECIFICATION [07-12-2017(online)].pdf | 2017-12-07 |
| 9 | 201747043863-PA [09-11-2018(online)].pdf | 2018-11-09 |
| 10 | 201747043863-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [07-12-2017(online)].pdf | 2017-12-07 |
| 10 | 201747043863-FORM 3 [08-05-2018(online)].pdf | 2018-05-08 |
| 11 | Correspondence by Agent_Assignment_20-12-2017.pdf | 2017-12-20 |
| 12 | 201747043863-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [07-12-2017(online)].pdf | 2017-12-07 |
| 12 | 201747043863-FORM 3 [08-05-2018(online)].pdf | 2018-05-08 |
| 13 | 201747043863-COMPLETE SPECIFICATION [07-12-2017(online)].pdf | 2017-12-07 |
| 13 | 201747043863-PA [09-11-2018(online)].pdf | 2018-11-09 |
| 14 | 201747043863-ASSIGNMENT DOCUMENTS [09-11-2018(online)].pdf | 2018-11-09 |
| 14 | 201747043863-DECLARATION OF INVENTORSHIP (FORM 5) [07-12-2017(online)].pdf | 2017-12-07 |
| 15 | 201747043863-8(i)-Substitution-Change Of Applicant - Form 6 [09-11-2018(online)].pdf | 2018-11-09 |
| 15 | 201747043863-DRAWINGS [07-12-2017(online)].pdf | 2017-12-07 |
| 16 | 201747043863-FORM 1 [07-12-2017(online)].pdf | 2017-12-07 |
| 16 | Correspondence by Agent_Assignment,Form26_13-11-2018.pdf | 2018-11-13 |
| 17 | 201747043863-POWER OF AUTHORITY [07-12-2017(online)].pdf | 2017-12-07 |
| 17 | 201747043863-RELEVANT DOCUMENTS [09-04-2019(online)].pdf | 2019-04-09 |
| 18 | 201747043863-FORM 13 [09-04-2019(online)].pdf | 2019-04-09 |
| 18 | 201747043863-PRIORITY DOCUMENTS [07-12-2017(online)].pdf | 2017-12-07 |
| 19 | 201747043863-PROOF OF RIGHT [07-12-2017(online)].pdf | 2017-12-07 |
| 19 | 201747043863-FORM 3 [06-05-2019(online)].pdf | 2019-05-06 |
| 20 | 201747043863-STATEMENT OF UNDERTAKING (FORM 3) [07-12-2017(online)].pdf | 2017-12-07 |
| 20 | 201747043863-FORM 18 [18-06-2019(online)].pdf | 2019-06-18 |
| 21 | 201747043863-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [07-12-2017(online)].pdf | 2017-12-07 |
| 21 | 201747043863-FER.pdf | 2021-10-17 |
| 1 | 201747043863E_30-04-2020.pdf |