IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0426795
(2006-06-27)
|
등록번호 |
US-7798223
(2010-10-11)
|
우선권정보 |
GB-0131019.2(2001-12-27) |
발명자
/ 주소 |
- Duggan, Andrew Michael
- Innes, Gareth Lyle
|
출원인 / 주소 |
|
대리인 / 주소 |
Patterson & Sheridan, LLP
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
41 |
초록
▼
A method of isolating a section of a drilled bore containing a problem zone comprises: providing a section of tubing; locating the tubing in the section of the bore; and expanding the tubing and forming at least an outer portion of the tubing to conform to irregularities in the bore wall, to isolate
A method of isolating a section of a drilled bore containing a problem zone comprises: providing a section of tubing; locating the tubing in the section of the bore; and expanding the tubing and forming at least an outer portion of the tubing to conform to irregularities in the bore wall, to isolate the problem zone. The tubing may feature a formable outer section, and the expansion of the tubing may be achieved using a compliant rotary expander.
대표청구항
▼
The invention claimed is: 1. A method of isolating a section of a drilled bore, the method comprising: forming an unlined section of the drilled bore and enlarging a section of the unlined section; disposing a tubing with an expander operatively coupled thereto into the drilled bore; locating at le
The invention claimed is: 1. A method of isolating a section of a drilled bore, the method comprising: forming an unlined section of the drilled bore and enlarging a section of the unlined section; disposing a tubing with an expander operatively coupled thereto into the drilled bore; locating at least a portion of the tubing in the unlined section of the drilled bore to be isolated, wherein the portion of tubing comprises an outer relatively deformable layer; and expanding the portion of the tubing into circumferential contact with a wall of the unlined section by using the expander such that the expanded portion conforms to irregularities in the wall of the unlined section of the drilled bore, wherein the outer relatively deformable layer extends across the irregularities in the wall and a section of the portion of the tubing is located in the enlarged section of the unlined section, wherein the enlarged section has a larger diameter than the unlined section. 2. The method of claim 1, wherein the tubing comprises a structural layer surrounded by the outer relatively deformable layer for contact with the bore wall. 3. The method of claim 2, wherein the deformable layer engages substantially the entire section of the drilled bore to be isolated upon expansion of the tubing. 4. The method of claim 2, wherein the deformable layer is an elastomer. 5. The method of claim 2, wherein the deformable layer swells in situ upon contact with hydrocarbon fluids to ensure contact with the wall of the unlined section. 6. The method of claim 1, wherein expanding the tubing provides a hydraulic seal between the tubing and the bore. 7. The method of claim 1, further comprising locating the tubing within the unlined section of the bore, spaced from existing tubing. 8. The method of claim 1, wherein at least a portion of the tubing is adapted to conform to a section of lined bore wall. 9. The method of claim 1, wherein the tubing is adapted to conform to both a section of unlined bore wall and a section of lined bore wall. 10. The method of claim 1, wherein the section of tubing is expanded such that an inner diameter of the section of tubing is substantially equal to an inner diameter of the lined bore. 11. The method of claim 1, further comprising enlarging a portion of the expanded tubing at a lower end thereof. 12. The method of claim 1, further comprising locating the section of tubing such that an end of the expanded tubing overlaps an existing tubing. 13. A method of isolating a section of a bore, the method comprising: drilling a section of bore below an existing section of bore-lining tubing to a larger diameter than an inner diameter of the existing tubing; positioning a tubing adjacent an unlined section of the bore to be isolated, the tubing having an outer relatively deformable layer; and expanding the tubing into circumferential contact with at least a portion of the unlined section of the bore by using a compliant expansion device such that the tubing conforms to a non-uniform portion in the bore, wherein the outer relatively deformable layer is disposed across the non-uniform portion in the bore and the section of tubing placed below the existing tubing is expanded to a diameter similar to that of the existing tubing. 14. The method of claim 13, wherein the expansion device is alterable in configuration between a first diameter and a second diameter. 15. The method of claim 13, further comprising locating the section of tubing across a problem zone, and isolating the problem zone from the bore with the expanded tubing, wherein the relatively deformable layer is disposed across the problem zone. 16. The method of claim 15, wherein the problem zone is a fluid loss zone. 17. The method of claim 15, wherein the problem zone is a section of bore where a mechanical collapse has occurred or is considered likely to occur. 18. The method of claim 13, wherein the deformable layer is substantially along the entire length of the tubing section. 19. The method of claim 13, further comprising locating the tubing in a bore below an existing section of bore-lining tubing. 20. The method of claim 19, further comprising locating the section of tubing such that an upper end of the expanded tubing overlaps the existing tubing. 21. The method of claim 19, further comprising expanding the upper end of the section of tubing to form a seal with the existing tubing. 22. The method of claim 13, wherein the expansion device is operatively connected to a portion of the tubing during the location thereof. 23. The method of claim 13, wherein the deformable layer swells in situ upon contact with hydrocarbon fluids to ensure contact with the unlined section of the bore. 24. A method of isolating a section of a wellbore, the method comprising: lowering a tubing into the wellbore, wherein the wellbore includes a lined section and an unlined section; positioning at least a portion of the tubing adjacent the unlined section to be isolated, wherein the portion of tubing comprises an outer relatively deformable layer; and expanding the tubing into circumferential contact with the unlined section of the bore by using a compliant expansion device such that the tubing conforms to irregularities in the wellbore and an inner diameter of the tubing is substantially equal to an inner diameter of the lined portion, wherein the outer relatively deformable layer extends across the irregularities in the wellbore. 25. A method of isolating a section of a bore, the method comprising: positioning a tubing adjacent an unlined section of the bore to be isolated, the tubing having an outer relatively deformable layer; and deforming the tubing in a manner whereby the tubing assumes a shape of a non-circular surrounding surface and forms a circumferential seal therebetween, wherein the tubing is deformed by first using a fixed diameter device and then by using a compliant expansion device coupled to the fixed diameter device, wherein the outer relatively deformable layer extends across the non-circular surrounding surface. 26. The method of claim 25, wherein the deformable layer swells in situ upon contact with hydrocarbon fluids to ensure a seal with the bore. 27. A method of isolating a problem zone of a wellbore, the method comprising: disposing a tubing with an expander operatively coupled thereto into the wellbore; locating at least a first portion of the tubing adjacent a casing located in the wellbore; locating at least a second portion of the tubing adjacent the problem zone of the wellbore to be isolated, wherein the first and second portions comprise an outer relatively deformable layer; expanding the first portion of the tubing into circumferential contact with the casing and further expanding the first portion and the casing such that the first portion of the tubing is expanded to an inner diameter similar to an inner diameter of an unexpanded portion of the casing; and expanding the second portion of the tubing into circumferential contact with the problem zone such that the expanded second portion conforms to irregularities of the problem zone. 28. The method of claim 27, wherein the outer relatively deformable layer extends across the irregularities of the problem.
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