Method of screen or pipe expansion downhole without addition...

Details Method of screen or pipe expansion downhole without addition... Method of screen or pipe expansion downhole without addition...

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 29/10 (2006.01)

Patent

CA 2469752

A method of streamlining expansion of long lengths of tubulars or screen is disclosed. In one embodiment, the expansion assembly is coupled with a length of pipe (34) that acts as a weight and has a length longer than the anticipated section to be expanded. There is a stinger (40) that fits into the pipe above the anchor and a seal to maintain sealing contact despite the downhole advance of the expansion assembly following each stroke of the expansion device and advance of a swage. By sequentially applying and removing pressure, the desired length is expanded downhole. Alternatively, coiled tubing is connected to the expansion assembly and weights that are above it and is paid out into the well as the expansion assembly descends after each stroke.

La présente invention concerne un procédé d'extension de profilage de grandes longueurs de tubulures ou de cribles. Dans un mode de réalisation de la présente invention, l'ensemble d'extension est couplé à une longueur de conduite (34) qui sert de poids et présente une longueur supérieure à la section anticipée à étendre. Une canule de guidage (40) s'adapte dans la conduite au-dessus de l'ancrage et un joint assure un contact étanche malgré l'avancement vers le fond de l'ensemble d'extension après chaque course du dispositif d'extension et avance d'un redresse-tubes. L'application et le retrait séquentiels d'une pression permet d'étendre vers le fond la longueur souhaitée. En variante, une tubulure en spirale est connectée à l'ensemble d'extension et à des poids qui se trouvent au-dessus de celui-ci et est dévidée dans le puits lorsque l'ensemble d'extension descend après chaque course.

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