Method and system for repairing the flow-line of corrugated metal pipes
AssigneeRoger Michael Bennett
InventorRoger Bennett
Life of this patent
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Abstract
A system and method for repairing the damaged portion of a flow-line of a Corrugated Metal Pipe is disclosed. A containment mold is created on the interior surface of the CMP using a series of overlapping rigid sheets that are attached to the CMP along the damaged flow-line. This mold is provided with injection ports through which a hydro-insensitive expanding polymer may be injected. External pressure is applied to the rigid sheet during injection and hardening of the polymer. The result is a single monolithic structure forming a patch over the damaged CMP flow-line.
Claims20
A method for repairing a damaged portion of the flow-line of a corrugated metal pipe (CMP), wherein the damaged portion extends from a first point to a second point of the flow-line, comprising:
- placing a plurality of rigid sheets over the damaged portion in an overlapping manner such that a first sheet covers both the first point and an undamaged portion of the CMP next to the first point and a second sheet covers both the second point and an undamaged portion of the CMP next to the second point, and wherein the sheets cover the CMP from the flow-line and extending to points on its sidewalls that are undamaged along the length of the damaged portion;
- applying a plurality of fasteners to connect said rigid sheets and CMP, wherein at least one of the fasteners is applied to the overlapping portions of the rigid sheets;
- applying pressure to the surface of each of the rigid sheets;
- and
- injecting a hydro-insensitive expanding polymer into a hole in each of the rigid sheets to fill a space between the sheets and the damaged portion of the CMP.
A system for repairing a damaged portion of the flow-line of a corrugated metal pipe (CMP), wherein the damaged portion extends from a first point to a second point of the flow-line, comprising:
- a plurality of rigid sheets placed over the damaged portion in an overlapping manner such that a first sheet covers both the first point and an undamaged portion of the CMP next to the first point and a second sheet covers both the second point and an undamaged portion of the CMP next to the second point, and wherein the sheets cover the CMP from the flow-line and extending to points on its sidewalls that are undamaged along the length of the damaged portion;
- a plurality of fasteners applied to connect said rigid sheets and CMP, wherein at least one of the fasteners is applied to the overlapping portions of the rigid sheets;
- a mounted stiffener applying pressure to the surface of each of the rigid sheets and the top of the CMP using a jack mechanism;
- and
- a hydro-insensitive expanding polymer injected into a hole in each of the rigid sheets to fill the space between the sheets and the damaged portion of the CMP.
Dependencies are inferred from the claim text.