F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 1/02 (2006.01) E21B 23/08 (2006.01) E21B 37/00 (2006.01) F16L 55/18 (2006.01) F16L 55/38 (2006.01)
Patent
CA 2437730
A method of diminishing the size of the cross section of an opening of a first hollow device (3) is disclosed. The first hollow device (3) is located in an undersea flow pipe (1) through which passes a fluid flow. First a second hollow device (45) is inserted into said undersea flow pipe (1), the second hollow device (45) having a leading portion (45A) and a trailing portion (45B). Next a foam pig (4) is inserted immediately after the second hollow device. Urged by the flow, the foam pig (4) displaces the second hollow device (45) along the undersea flow pipe (1), until the latter encounters the first hollow device. The leading portion (45A) of the second hollow device (45) is then inserted into the opening of the first device (3), thereby diminishing the size of the cross section of this opening.
La présente invention concerne un procédé qui permet de réduire la taille de la section transversale de l'ouverture d'un premier dispositif creux (3). Le premier dispositif creux précité (3) est placé dans un tube d'écoulement sous-marin (1) dans lequel circule un fluide. On introduit d'abord un second dispositif creux (45) à l'intérieur du tube d'écoulement sous-marin (1), lequel second dispositif creux (45) possède une partie avant (45A) et une partie arrière (45B). On introduit ensuite un furet en mousse (4) immédiatement après le second dispositif creux. Poussé par l'écoulement, le furet en mousse (4) déplace le second dispositif creux (45) le long du tube d'écoulement sous-marin (1) jusqu'à ce que le second dispositif creux (45) rencontre le premier dispositif creux. On introduit ensuite la partie avant (45A) du second dispositif creux (45) dans l'ouverture du premier dispositif (3), réduisant de la sorte la taille de la section transversale de cette ouverture.
Gowling Lafleur Henderson Llp
Petroleo Brasileiro S.a. - Petrobras
LandOfFree
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