Support device of equipment inside a well, a process for fixing it and a process for placing such equipment

摘要

A support device for tubular equipment, such as a liner inside a well, and methods for using the support device, the support device including two elements attached to each other. The two elements are: a) a cylindrical sleeve, made of ductile metal and having an external diameter slightly less than an inner diameter of the well or of a casing inserted into the well; and b) a set of tabs made of hard metal, which are spaced apart from each other and integral with the cylindrical sleeve. The tabs extend downwards from the cylindrical sleeve and an outer wall of the tabs is fitted with a series of notched formations, such as teeth, whereas an inner wall of the tabs has a conical form, the apex of which is turned down.

主权项

1. A process for fixing a support device for tubular equipment inside a well or a casing present in the well, the support device including two elements attached to each other, the support device comprising:
a cylindrical sleeve, made of ductile metal, the cylindrical sleeve having an external diameter less than an inner diameter of the well or of the casing inserted into the well; and a set of tabs made of hard metal, which are spaced apart from each other and integral with the cylindrical sleeve, the tabs extending downwards from the cylindrical sleeve, wherein an outer wall of the tabs is fitted with a series of notched formations, whereas an inner wall of the tabs has a conical form, the apex of which is turned down inside the well or the casing present in the well, wherein said process comprises the successive steps of: a) radially expanding the sleeve by means of a packer beyond its elastic limit so that a wall of the sleeve is pressed firmly against an inner wall of the well or of the casing; b) deploying the tabs by means of a rigid tool with a conical or tapered end, which bears against the inner wall of the tabs to flex the tabs outward, such that their notched formations penetrate the inner wall of the well or of the casing, the metal of which is softer than that of the tabs.