Patent ID: 9163487
Filing Date: 2015-10-20
Classification: E21B,F16L

Abstract:
1. A device for laying an expansible lining in a conduit, the device comprising: a patch having an initial diameter less than that of the conduit, the patch being configured to deform by radial expansion beyond an elastic limit to an expanded diameter such that it may contact a wall of the conduit, an expander tool axially displaceable inside the patch and having a leading distal end and an opposed proximal end, the expander tool configured to cause the radial expansion of the patch to the expanded diameter, and a checking member mounted adjacent the proximal end of the expander tool, wherein a section of the checking member is calibrated so that the checking member is capable of passing freely inside the patch when the patch is properly expanded, and wherein the checking member is unable to pass inside the patch when the patch is improperly expanded.