Source: https://patents.google.com/patent/EP2140101B1/en
Timestamp: 2018-10-15 13:42:02
Document Index: 542438213

Matched Legal Cases: ['art 10', 'art 8', 'art 8', 'art 8', 'art 10', 'art 10', 'art 8']

EP2140101B1 - Cladding method and expansion tool - Google Patents
EP2140101B1
EP2140101B1 EP20080734516 EP08734516A EP2140101B1 EP 2140101 B1 EP2140101 B1 EP 2140101B1 EP 20080734516 EP20080734516 EP 20080734516 EP 08734516 A EP08734516 A EP 08734516A EP 2140101 B1 EP2140101 B1 EP 2140101B1
EP20080734516
EP2140101A2 (en )
Another solution to this problem is known from US 2005/057005 in which the liner has projections that, during expansion of the liner, are fastened to the inside of the casing. This is also known from US 2006/0237188 . However, these projections may break off, the result being that the liner is released and the leak is not sealed. A further solution is provided in the dosest prior art document US 2003/0121558 where the liner is provided with anchoring windows for permitting expandable elements to engage the liner.
In order to insert the liners into the casing or the like, the whole liner needs to have a external diameter greater than that of the casing. When expanding the liner only some of the liner is expanded, e.g. the first part, whereas the second part Is not expanded. The result is that the diameter of the casing is decreased in those areas where the liner is not expanded. Thus, the leak in the casing may be sealed, but the fluid flow In the casing or pipeline is substantially decreased, making the casing less efficient than before the leak occurred.
By using a cladding method of the present invention, the entire liner is expanded from an initial diameter to a larger second diameter fitting the internal surface of the casing. Thus, when the tool leaves the liner in the casing, the diameter is the same along the entire extension of the liner, the diameter is moreover only somewhat smaller than the internal diameter of the casing. Hereby, the leak in the casing is sealed without substantially narrowing the internal diameter of the casing and thus without substantially diminishing the flow of the fluid flowing inside the casing.
In one embodiment, the cladding method may further comprise the step of retracting the expansion tool between expansion of the first and the second part of the liner. Furthermore, the expansion means may be a mandrel.
In one embodiment, the sealing means may curl seen from the ring diameter towards the centre allowing the ring to be straightened out to a larger diameter than the original ring diameter when expanded.
at least one fastening means for fixing a first part of the liner and for holding the liner in place outside the leak during expanding,
an expanding means for expanding the liner to a larger diameter from a second part of the liner all the way through the liner.
Fig. 9 shows the expansion tool of Fig 6, 7 and 8 before the rest of the liner is expanded, and
The liner 1 is shown used in a casing 3; however, the liner 1 may also be used in another cavity, such as a pipeline, a borehole, or a well downhole. A casing 3 is placed inside a borehole for transporting fluid, such as oil, a mix of oil with water, gas, etc. In many drilling operations for making the borehole, the fluid is mixed with filtrate or other additives in order to improve the drilling process. Furthermore, the fluid may contain other elements, such as cuttings, swarf, sand, pipe dope, remains from a previous explosion, rust from the casing in the well, or detachments tom-off from the well, the casing, or the formation. In the following, the invention will be explained with reference to a casing 3 conveying oil fluid.
The liner 1 is cladded inside the casing 3 for sealing of a leak 2 in the casing 3. Firstly, a second part 10 of the liner is fastened in some fastening means 9 or gripping means 9 of an expansion tool and the liner 1 is inserted in the casing 3 outside the leak 2. Secondly, the first part 8 of the liner 1 is expanded until the sealing means 6 in the grooves 5 of the first part 8 of the liner 1 are pressed against the casing 3 and fasten the first part 8 to the casing 3. Then, the liner 1 is released from the fastening means 9 so that the second part 10 of the liner 1 is no longer held by the tool and the liner 1 is held in place by the sealing means 6 in the first part of the liner. Finally, the second part 10 of the liner 1 is also expanded and the liner 1 has thus been expanded along its entire extension to abut the casing 3 for sealing the leak 2.
The number of sealing means 6 is determined by how much force is needed for expanding the rest of the liner 1 when the fastening means or gripping means 9 have released the liner 1. However, the sealing means 6 may vary in diameter and the cross-section of the ring may be oval as well as circular. The larger the diameter, the more able the sealing means 6 are to expand, and an oval shape may increase the friction area between the sealing means 6 and the inside wall of the casing 3. Thus, the number of sealing means 6 may also in part be determined by the size and shape of the sealing means 6.
In another embodiment, the expansion means is a body with rollers. In yet another embodiment, the expansion means has a cone as shown in Fig. 6. A first part of the cone has a larger diameter than that of a non-expanded liner 1 so as to be able to expand the liner 1 when the cone is moved in the direction of the tool. The first part of the cone extends outside the liner 1 before expanding the liner 1 so that the liner 1 is fastened between the cone and a body of the expansion tool. In this way, the expansion tool and the cone can uphold the liner 1 when inserting the liner 1 in the casing 3.
After the liner 1 has been fastened, it is inserted into the casing 3 outside the leak 2 to be sealed. In this embodiment, the positioning of the expansion tool takes place at the same time as the fastering of the liner 1 in the expansion tool. Subsequently, the expansion means of the expansion tool expands the first part 8 of the liner 1 as shown in Fig. 7 by retracting the shaft onto which the cone is positioned into the expansion tool. The movement of the expansion means is shown by an arrow.
A cladding method for sealing a leak (2) In a casing (3), a pipeline, a borehole, or a well downhole using a liner (1) having a tube (4) with a first diameter and a plurality of sealing means (6) in a plurality of circumferential grooves (5), comprising the steps of:
- fastening the liner in a fastening means (9) of an expansion tool,
- inserting the liner having a first part (8) and a second part (10) into the casing (3) outside the leak (2),
- positioning an expansion means of the expansion tool at the first part of the liner,
- expanding the first part of the liner until the sealing means in the grooves of the first part of the liner are pressed against the casing and fasten the first part to the casing,
- releasing the liner so that the liner is free of the tool and the liner is held in place by the sealing means ih the first part of the liner, and
- expanding all the way through the liner by expanding also the second part of the liner to abut the casing for sealing the leak.
A cladding method according to claim 1, further comprising the step of retracting the expansion tool between expansion of the first and the second part of the liner.
A cladding method according to claim 1 or 2, wherein the expansion means is a mandrel.
A cladding method according to claim 1 or 2, wherein the expansion means is a body with rollers.
A cladding method according to claim 1 or 2, wherein the expansion means has a cone where part of the cone has a larger diameter than that of a non-expanded liner and that part of the cone extends outside the liner before expansion of the liner.
A cladding method according to any of the preceding claims, wherein the sealing means is a ring with a ring diameter and a centre, such as an O-ring.
A cladding method according to claim 6, wherein the sealing means curls seen from the ring diameter towards the centre, allowing the ring to be straightened out to a larger diameter than the original ring diameter during expansion.
A cladding method according to any of the preceding claims, wherein the sealing means is made of silicone, natural or syntactic rubber, polymer, or the like.
Expansion tool for expending a liner for sealing a leak (2) in a casing (3) from within the casing using a liner, comprising
- at least one fastening meas (9) for fixing a first part of the liner and for holding the liner in place outsidel the leak during expanding,
- an expansion means for expanding the liner to a larger diameter from a second part of the liner all the way through the liner, the expansion means is a cone and a first part of the cone characterised in that extends outside the liner before expanding the liner so that the liner is fastened between the cone and a body of the expansion tool.
Expansion tool according to claim 9, wherein the expansion means is a body with rollers.
Expansion tool according to claim 9, wherein the expansion means has a cone where part of the cone has a larger diameter than that of a non-expanded liner and that part of the cone extends outside the liner before expansion of the liner so that the cone can uphold the liner when inserting the liner into the casing.
Expansion tool according to any one of claims 9-11, wherein the expansion means is moved away from the expansion tool while expanding the liner.
Expansion tool according to any one of claims 9-11, wherein the expansion means is retracted into the expansion tool while expanding the liner.
Expansion tool according to any one of claims 9-13, wherein the fastening means is connected to a shaft penetrating the expansion means in its centre.
EP20080734516 2007-04-26 2008-04-28 Cladding method and expansion tool Not-in-force EP2140101B1 (en)
PCT/DK2008/000159 WO2008131771A3 (en) 2007-04-26 2008-04-28 Cladding method and expansion tool
EP2140101A2 true EP2140101A2 (en) 2010-01-06
EP2140101B1 true EP2140101B1 (en) 2012-09-05
EP20080734516 Not-in-force EP2140101B1 (en) 2007-04-26 2008-04-28 Cladding method and expansion tool
WO (1) WO2008131771A3 (en)
CN106555571A (en) * 2015-09-20 2017-04-05 辽宁石油化工大学 Apparatus for studying relevant factors of crude oil productivity
WO1987005677A1 (en) * 1986-03-19 1987-09-24 Rib Loc Australia Pty. Ltd. Method and means for lining and overwrapping of conduits
CN2777184Y (en) 2004-11-15 2006-05-03 新疆石油管理局钻井工艺研究院 External packer filling tool for completion pipe of horizontal well
CN101680282B (en) 2014-10-15 grant
US7954516B2 (en) 2011-06-07 grant
WO2008131771A3 (en) 2009-02-19 application
US20100058828A1 (en) 2010-03-11 application
CA2684681C (en) 2015-04-14 grant
CA2684681A1 (en) 2008-11-06 application
WO2008131771A2 (en) 2008-11-06 application
CN101680282A (en) 2010-03-24 application
EP2140101A2 (en) 2010-01-06 application
Inventor name: HALLUNDBAEK, JORGEN
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