E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 41/00 (2006.01) E21B 23/00 (2006.01) E21B 23/03 (2006.01) E21B 23/12 (2006.01) E21B 43/10 (2006.01) H05B 6/42 (2006.01)
Patent
CA 2411363
An apparatus and method to complete a lateral wellbore that can be utilized for existing or new wells. The apparatus can be set in tension with positive confirmation on surface of correct orientation and position. Additionally, the apparatus does not restrict the internal diameter of the liner or the central wellbore and permits full access to both the lateral and the primary wellbore below the junction. The invention includes a tie back assembly (140) disposed at an upper end of a liner string (135). The tie back assembly (140) includes a hanger (150), a packer (145) and a tubular housing (175). The housing includes a liner window (155) formed in a wall thereof to permit access to the lower primary wellbore. An inner tube (185) is disposed within the housing and includes a key (180) disposed on an outer surface for alignment with a window (105) formed in a wall of the casing and a no-go obstruction (190) with is constructed and arranged to contact a lower portion of the casing window to axially locate the tie back assembly in the primary wellbore.
L'invention concerne un appareil permettant de localiser un premier matériel tubulaire par rapport à une fenêtre ménagée dans un second matériel tubulaire, qui comporte au moins un élément dépassant d'une surface extérieure de la chemise de manière à aligner la chemise par rapport à une fenêtre ménagée dans le tubage d'un puits de forage primaire. Selon un aspect, l'appareil selon l'invention comprend une clavette et une obstruction de blocage, qui permettent d'aligner, de façon axiale et rotationnelle, l'appareil avec la fenêtre.
Marks & Clerk
Weatherford/lamb Inc.
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