Abstract: Process for the purification and separation of a synthesis gas stream containing hydrogen, carbon monoxide and carbon dioxide in which synthesis gas is purified in a purification unit (W) involving a methanol washing step to remove carbon dioxide, the carbon dioxide depleted synthesis gas is purified by adsorption (P) to produce a purified synthesis gas stream and the purified gas stream is sent to a cryogenic separation unit (C) where it is cooled and separated by cryogenic separation in a column of a column system, at least one stream (13) enriched in carbon monoxide is removed from a column of the column system, warmed and divided in two, one part of the stream being removed from the cryogenic separation unit as a first stream, the other part of the stream forming a second stream (13B, 15B) and being sent to the purification unit wherein it is warmed and the warmed second stream is mixed with the first stream.

Abstract: The invention discloses an apparatus (40) comprising: a setting section (1) surrounded by a first sleeve (2), said first sleeve being expandable and impermeable to a material; an inflating means (1a, 3a) for inflating said first sleeve, said inflating means ensuring that the first sleeve can be in contact with a first zone (60a) of a tube (10) which is permeable to said material, so that said first zone of said tube becomes impermeable to said material; and further comprising a second sleeve portion (4) partially permeable to said material on a second zone (60A?) and attached to said first sleeve so that: a path (2a) is provided between said first sleeve and said second sleeve portion and so that, when the first sleeve is inflated the second zone can be in contact with said tube allowing the material to flow in the path and through the second zone. Also, the invention discloses the associated method for treatment of a near zone and/or a far zone of a well with the disclosed apparatus.

Abstract: The invention discloses an apparatus (40) comprising: a setting section (1) surrounded by a first sleeve (2), said first sleeve being expandable and impermeable to a material; an inflating means (1a, 3a) for inflating said first sleeve, said inflating means ensuring that the first sleeve can be in contact with a first zone (60a) of a tube (10) which is permeable to said material, so that said first zone of said tube becomes impermeable to said material; and further comprising a second sleeve portion (4) partially permeable to said material on a second zone (60A?) and attached to said first sleeve so that: a path (2a) is provided between said first sleeve and said second sleeve portion and so that, when the first sleeve is inflated the second zone can be in contact with said tube allowing the material to flow in the path and through the second zone. Also, the invention discloses the associated method for treatment of a near zone and/or a far zone of a well with the disclosed apparatus.