CASING ANNULUS CEMENT FOUNDATION SYSTEM AND A METHOD FOR FORMING A FLANGE COLLAR CONSTITUTING A CEMENT FOUNDATION

摘要

A method for forming a flange collar constituting a cement foundation in a casing annulus, includes the steps of installing a casing section comprising an internal sleeve axially displaceable by a conveyed tool for opening a casing cementing outlet; the internal sleeve connected through radial bolts through axial-parallel slots through the casing wall to a casing-external sleeve, the casing-external sleeve abutting against a first edge of a deformable metal sleeve having its opposite, second end abutting axially against a radial shoulder on the casing section; using the drill pipe conveyed tool for axially displacing the internal sleeve thus forcing the external sleeve to deforming the metal sleeve to a radially extending flange collar radially extending across the casing annulus, and ejecting cement via the casing cementing outlet to the annulus, allowing the cement to distribute above the formed radially extending flange collar, and allowing the cement to settle in the annulus.

主权项

1. A casing annulus cement foundation system comprising:
a casing section comprising an internal sleeve arranged for being manipulated by a conveyed shift tool exerting a force for translating said internal sleeve in an axial direction of said casing section; wherein said internal sleeve is provided with one or more radially directed bolts extending through corresponding axial-parallel slots through the casing wall of said casing section and fixed to a corresponding sliding casing-external sleeve, wherein said sliding casing-external sleeve abutting axially onto a first sleeve end of a deformable metal sleeve having a second sleeve end abutting onto an external ring shoulder on said casing section, and wherein said sliding casing-external sleeve is arranged for axially compressing said deformable metal sleeve so as for making a central portion between said first and second ends to expand by radial kinking to form a metal flange collar blocking said casing annulus.