SEALING ARRANGEMENT AND SEALING METHOD
The invention relates to a sealing arrangement ( 100 ) for sealing a leak ( 21 ) in a casing ( 2 ) or for sealing off a production zone ( 1 ) where the casing having a circumference and perforations ( 3 ) is situated in a borehole ( 22 ) downhole, but with a distance to an inner wall of the borehole, creating an intervening space ( 4 ) there between. The sealing arrangement comprises a composition ( 5 ) for injection into the intervening space or into a leak in the casing, and a non-miscible net comprised in the composition after injection in order to fixate the injected composition in a predetermined position.
1 . Sealing arrangement ( 100 ) for sealing a leak ( 21 ) in a casing ( 2 ) or for sealing off a production zone ( 1 ) where the casing having a circumference and perforations ( 3 ) is situated in a borehole ( 22 ) downhole, but with a distance to an inner wall of the borehole, creating an intervening space ( 4 ) there between, comprising:
a composition ( 5 ) for injection into the intervening space or into a leak in the casing, and
a non-miscible net comprised in the composition after injection in order to fixate the injected composition in a predetermined position.
2 . Sealing arrangement according to claim 1 , wherein the net is a mesh, a woven wire, a wire netting, a netting, a web, a grid, a lattice, or a grating.
3 . Sealing arrangement according to claim 1 , wherein the net is ejected prior to or simultaneously with the composition.
4 . Sealing arrangement according to claim 1 , wherein the net is ejected prior to or simultaneously with the composition as elongated components, such as strings or threads forming the mesh, woven wire, wire netting, web, grid, lattice, or grating after ejection.
5 . Sealing arrangement according to claim 1 , wherein the net is made of wire, coiled wire ( 28 ), polymer thread, polymer fibre, carbon fibre, glass fibre, metal threads, or a like elongated component.
6 . Sealing arrangement according to claim 1 , wherein the net is made of a magnetic material.
7 . Sealing arrangement according to claim 1 , wherein the net is made of elements in the composition pasting together and thereby forming a netting or a net within the composition.
8 . Sealing arrangement according to claim 7 , wherein each element is made of a magnetic material.
9 . Sealing arrangement ( 100 ) for sealing a leak ( 21 ) in a casing ( 2 ) or for sealing off a production zone ( 1 ) where the casing having a circumference and perforations ( 3 ) is situated in a borehole ( 22 ) downhole, but with a distance to an inner wall of the borehole, creating an intervening space ( 4 ) there between, comprising:
a composition ( 5 ) for injection into the intervening space or into a leak in the casing, and
units in the composition pasting together during hardening of the injected composition and thereby forming a netting or a net within the composition, wherein each of the units have a core enclosed within a compound.
10 . Sealing arrangement according to claim 9 , wherein each separate unit has an intermediate substance between the core and the surrounding compound.
11 . Sealing arrangement according to claim 9 , wherein the core or the intermediate substance is made from ceramics, metal, polymer fibre, glass fibre, or a magnetic material making the separate units paste together.
12 . Sealing arrangement according to claim 1 , wherein the composition comprises a compound.
13 . Sealing arrangement according to claim 9 , wherein the compound comprises cement, polymer, synthetic rubber, natural rubber, or silicone.
14 . Sealing arrangement according to claim 9 , wherein the compound comprises a curing agent, binding agent, hardener, or accelerator.
15 . Sealing method for sealing a leak or a production zone or for minimising an open space above a packer ( 19 ) between a production casing and an intermediate casing, comprising the steps of:
injecting a composition ( 5 ),
forming of a non-miscible net ( 30 ) in the composition in order to fixate the injected composition in a predetermined position.
16 . Sealing method according to claim 15 , wherein the net is discharged prior to or simultaneously with the injecting step and takes form within the composition when the composition is injected to at least partly surround the net.
17 . Sealing method according to claim 15 , wherein the net is formed from elements or units pasting together within the composition during hardening or stiffening of the compound or the composition.
18 . Downhole tool comprising a chamber comprising the sealing arrangement according to claim 1 .