System and method for recompletion of old wells

Details System and method for recompletion of old wells System and method for recompletion of old wells

E - Fixed Constructions

21

B

E21B 43/12 (2006.01) E21B 33/124 (2006.01) E21B 34/08 (2006.01)

Patent

CA 2718832

A system for recompletion of an old well (24) in order to achieve an increased oil recovery from a reservoir (26), said system comprising a pipe (27) inserted into the old well (24), at least two constrictors or swell packers (29) being arranged along the length of the recompleted well (24, 27) and defining a well section between two successive constrictors or swell packers (29), said system further comprising at least one autonomous valve (2) arranged in said well section defined between said two successive swell packers or constrictors (29). Disclosed is also a method for recompletion of an old well (24) in order to achieve an increased oil recovery from a reservoir (26).

L'invention porte sur un système pour la recomplétion d'un ancien puits (24) afin d'obtenir une plus grande récupération de pétrole à partir d'un gisement (26), ledit système comportant un tuyau (27) introduit dans l'ancien puits (24), au moins deux dispositifs d'étranglement ou garnitures gonflantes (29) étant agencées le long de la longueur du puits en recomplétion (24, 27) et définissant une section de puits entre deux dispositifs d'étranglement ou garnitures gonflantes successives (29), ledit système comportant en outre au moins une vanne autonome (2) agencée dans ladite section de puits définie entre lesdites deux garnitures gonflantes ou dispositifs d'étranglement successifs (29). L'invention porte également sur un procédé pour la recomplétion d'un ancien puits (24) afin d'obtenir une plus grande récupération de pétrole à partir d'un gisement (26).

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