E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/16 (2006.01) E21B 43/12 (2006.01)
Patent
CA 2424137
In an oil well producing by means of continuous gas lift a device is installed into the tubing, said device being provided with a first lower portion, which provides a progressive constraint in the area for the passage of the flow coming from the reservoir, a second medium portion, located above the first lower portion, located above the lower portion, which makes said area for the passage of the flow coming from the reservoir to be substantially constant at this point and smaller than the original area of the tubing, and a third uppe portion, located above the second medium portion, which provokes a progressive widening in said area for the passage of the flow coming from the reservoir, until such area for the passage of the flow is again equal to the original area of the tubing. Such device can be located in front of the gas lift valve through which the gas is injected.
Selon l'invention, dans un puits de pétrole qui produit par extraction au gaz, on installe dans le tubage un dispositif pourvu d'une première partie inférieure, laquelle produit une contrainte progressive dans la zone de passage du flux provenant du gisement. Une deuxième partie intermédiaire, située au-dessus de la première partie inférieure, rend ladite zone de passage sensiblement constante à ce niveau et plus petite que la zone initiale du tubage. Enfin, une troisième partie supérieure, située au-dessus de la deuxième partie intermédiaire, provoque un élargissement progressive dans ladite zone de passage jusqu'à ce qu'elle devienne égale à la zone initiale du tubage. Un tel dispositif peut être placé devant la soupape d'extraction au gaz par laquelle s'échappe le gaz.
Gowling Lafleur Henderson Llp
Petroleo Brasileiro S.a. - Petrobras
LandOfFree
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