E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 33/14 (2006.01) E21B 41/00 (2006.01) E21B 43/10 (2006.01)
Patent
CA 2120366
In accordance with the present invention, a plurality of methods are provided for solving important and serious problems posed by lateral (and especially multilateral) completion in a wellbore including methods for sealing the junction between a vertical and lateral (70) well. Methods are disclosed for improved juncture sealing including novel techniques for establishing pressure tight seals between a liner (88) in the lateral wellbore (70) and a liner (66) in the vertical wellbore. These methods generally relate to the installation of a liner (88) to a location between the vertical and lateral (70) wellbore such that the vertical wellbore is blocked. Thereafter, at least a portion of the liner (88) is removed to reopen (76) the blocked vertical wellbore.
Selon l'invention, plusieurs procédés sont décrits afin de résoudre des problèmes importants et sérieux posés par la complétion latérale (et en particulier multilatérale) dans un trou de puits, y compris des procédés permettant de sceller hermétiquement la jonction entre un puits vertical et un puits latéral (70). Les procédés décrits permettant d'améliorer l'herméticité de la jonction comprennent de nouvelles techniques d'établissement de joints d'étanchéité à l'épreuve de la pression entre une garniture (88) dans un trou de puits latéral (70) et une garniture (66) dans un trou de puits vertical. Ces procédés concernent généralement l'installation d'une garniture (88) en un point situé entre le trou de puits vertical et le trou de puits latéral (70) de sorte que l'on bloque le trou de puits vertical. Ensuite, au moins une partie de la garniture (88) est retirée afin de réouvrir (76) le trou de puits vertical bloqué.
Bangert Daniel S.
Mcnair Robert J.
Baker Hughes Incorporated
Sim & Mcburney
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