Apparatus and Method for Repairing Damaged Pipe

Abstract

An apparatus and method for repairing a damaged pipe is disclosed. A securing arm is adapted to hold the damaged pipe against a work surface. A brace plate having a central aperture is affixed to the work surface. A bevel plate having an offset aperture is affixed to the brace plate such that the offset aperture is aligned with the central aperture. A winch, which includes a cable, is also affixed to the work surface. A mandrel is removably affixed to an end of the cable. The winch is used to pull the mandrel through the damaged pipe.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, wherein like reference numerals refer to similar components:

FIG. 1 is a partial top schematic view of an apparatus for removing dents from pipe;

FIG. 2 is a side view of the apparatus of FIG. 1;

FIG. 3 is a side view of a brace plate for the apparatus of FIG. 1;

FIG. 4 is a side view of a bevel plate for the apparatus of FIG. 1;

FIG. 5 is a top view of the bevel plate of FIG. 4;

FIG. 6 is side view of a pipe hold-down for the apparatus of FIG. 1;

FIG. 7 is a sectional view of a first mandrel;

FIG. 8 is a sectional view of a second mandrel; and

FIG. 9 is a sectional view of a third mandrel.

Claims

1. An apparatus for repairing a damaged pipe, the apparatus comprising: a work surface;a winch affixed to the work surface, the winch including a cable;a mandrel removably affixed to an end of the cable;a brace plate affixed to the work surface, the brace place having a central aperture;a bevel plate affixed to the brace plate, the bevel plate having an offset aperture aligned with the central aperture; anda securing arm adapted to hold the damaged pipe against the work surface.

2. The apparatus of claim 1, further comprising a hydraulic pump operatively connected to the winch.

3. The apparatus of claim 2, wherein the hydraulic pump comprises a variable pressure compensated hydraulic pump.

4. The apparatus of claim 2, wherein the winch comprises a variable speed hydraulic winch.

5. The apparatus of claim 1, wherein the bevel plate includes an annular shoulder and an annular beveled surface, both disposed at a periphery of the offset aperture.

6. The apparatus of claim 5, wherein the annular shoulder has a width that is approximately equal to a wall thickness of the damaged pipe.

7. The apparatus of claim 1, wherein the securing arm is pivotally affixed to the work surface.

8. The apparatus of claim 1, wherein the securing arm comprises a plurality of fingers extending toward the work surface, each finger including a tip adapted to secure the damaged pipe against the work surface.

9. An apparatus for repairing a damaged pipe, the apparatus comprising: a work surface;a variable speed hydraulic winch affixed to the work surface, the winch including a cable;a variable pressure compensated hydraulic pump operatively connected to the winch.a mandrel removably affixed to an end of the cable;a brace plate affixed to the work surface, the brace place having a central aperture;a bevel plate affixed to the brace plate, the bevel plate including an offset aperture, an annular shoulder, and an annular beveled surface, wherein the annular shoulder and the annular beveled surface are disposed at a periphery of the offset aperture, and the offset aperture is aligned with the central aperture; anda securing arm adapted to hold the damaged pipe against the work surface.

10. The apparatus of claim 9, wherein the annular shoulder has a width that is approximately equal to a wall thickness of the damaged pipe.

11. The apparatus of claim 9, wherein the securing arm is pivotally affixed to the work surface.

12. The apparatus of claim 9, wherein the securing arm comprises a plurality of fingers extending toward the work surface, each finger including a tip adapted to secure the damaged pipe against the work surface.

13. A method for repairing a damaged pipe, the method comprising: securing a damaged pipe against a work surface;abutting one end of the damaged pipe against a braced bevel plate, the bevel plate including an offset aperture;running a cable through the offset aperture and the damaged pipe, wherein a first end of the cable is wrapped around a winch;affixing a mandrel to a second end of the cable; andoperating the winch to pull the mandrel through the damaged pipe.

14. The method of claim 13, wherein operating the winch includes operating the winch using a hydraulic pump.

15. The method of claim 14, wherein the hydraulic pump comprises a variable pressure compensated hydraulic pump.

16. The method of claim 14, wherein the winch comprises a variable speed hydraulic winch.

17. The method of claim 13, wherein abutting one end of the damaged pipe against the braced bevel plate includes abutting one end of the damaged pipe against one of a beveled annular surface or an annular shoulder on the bevel plate, wherein the beveled annular surface is adjacent the annular shoulder and both are disposed at a periphery of an offset aperture in the bevel plate.

18. A method for repairing a damaged pipe, the method comprising: securing a damaged pipe against a work surface;abutting one end of the damaged pipe against one of a beveled annular surface or an annular shoulder on a bevel plate, wherein the beveled annular surface is adjacent the annular shoulder and both are disposed at a periphery of an offset aperture in the bevel plate;running a cable through the offset aperture and the damaged pipe, wherein a first end of the cable is wrapped around a variable speed hydraulic winch;affixing a mandrel to a second end of the cable; andoperating the winch using variable pressure compensated hydraulic pump to pull the mandrel through the damaged pipe.