E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/10 (2006.01) E21B 7/06 (2006.01) E21B 23/02 (2006.01) E21B 23/12 (2006.01) E21B 41/00 (2006.01)
Patent
CA 2233081
The present invention is directed to a method for the entry of a tool from a cased wellbore (11) into a lined and sealed completed lateral (12) which includes the steps of measuring the distance from at least one apex (36) of the ellipse formed by the intersection of the completed lateral and the wellbore to a fixed point in the wellbore and aligning a re-entry device (70) from the fixed point to allow the tool to enter the lateral from the cased wellbore. The fixed point in the wellbore may be a keyway (40) in a joint of the casing or the keyway (48) in a packer (54) positioned in the wellbore. The invention further includes the apparatus for measuring the distance from the fixed point which includes an inflatable packer (42) with an outside memory- retention surface and a tail joint (46) having a guide key which seats in the key slot.
L'invention concerne un procédé d'introduction d'un outil depuis un puits de forage tubé (11) dans un forage latéral achevé (12), doublé et scellé, qui consiste à mesurer la distance depuis au moins un sommet (36) de l'ellipse créée par l'intersection du forage latéral achevé et du puits de forage jusqu'à un point fixe du puits, puis à aligner un dispositif de rentrée (70) depuis le point fixe, de façon à permettre à l'outil de pénétrer dans le forage latéral à partir du puits de forage tubé. Le point fixe du puits de forage peut être une rainure de clavette (40) dans un joint du tubage ou la rainure de clavette (48) dans un presse-étoupe (54) placé dans le puits. L'invention concerne, de plus, un dispositif servant à mesurer la distance depuis le point fixe et comprenant un presse-étoupe gonflable (42) pourvu d'une surface extérieure à mémoire de forme et un joint de queue (46) possédant une clavette de guidage se logeant dans la fente de la clavette.
Halliburton Energy Services Inc.
Marks & Clerk
Natural Reserves Group Inc.
LandOfFree
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