One trip cemented expandable monobore liner system and method

E - Fixed Constructions – 21 – B

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E21B 43/10 (2006.01) E21B 33/14 (2006.01) E21B 34/14 (2006.01)

Patent

CA 2597565

An apparatus to protect the mounting area (202) of casing and a locating profile (209) and optionally a sliding sleeve valve (200) and a flow path from the outside of the valve to the annulus when subsequent attachment of an expanded liner (218) is intended and the expanded liner is to be cemented in place. A barrier sleeve (204), nose (207), and outer sleeve (210) define a sealed cavity having a loose incompressible material (208) inside that covers the mounting location on the casing. A locating profile and an optional sliding sleeve valve and a flow path from the outside of the valve to the annulus can be provided. The cementing of the casing takes place through the barrier sleeve. After the cementing, the sleeve and nose are drilled out and the incompressible material is removed to the surface with the drill cuttings.

Un appareil pour protéger la zone de montage (202) d'un carter et un profil de positionnement (209) et éventuellement une vanne à chemise mobile (200) et un passage d'écoulement de l'extérieur de la vanne vers la zone annulaire lorsqu'on prévoit de fixer ultérieurement la garniture expansée et que celle-ci doit être maintenue en place par collage. Une chemise barrière (204), le museau (207) et une chemise extérieure (210) définissent une cavité hermétique renfermant un matériau libre incompressible (208) couvrant le point de montage sur le carter. Un profil de positionnement et éventuellement une vanne à chemise mobile et un passage d'écoulement de l'extérieur de la vanne vers la zone annulaire peuvent être réalisés. Le collage du carter intervient au travers de la chemise barrière. Après le collage, on dégage par perçage la chemise et le museau, le matériau incompressible étant ramené à la surface avec les débris de perçage.

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