Method for reducing pipe ovality

Patent metadata

Field	Value
Publication number	US-9623462-B2
Application number	US-201414513366-A
Country	US
Kind code	B2
Filing date	Oct 14, 2014
Priority date	Oct 14, 2014
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

The present disclosure provides a method for reducing ovality in pipe for joining to pipe components by using a plug coupled on an inside surface of the pipe and a sacrificial component coupled to the end of the pipe to establish a coupling interface. The plug, the sacrificial component, or a combination thereof assists in minimizing ovality changes during use of the pipe, particularly at the end of the pipe. When the pipe is to be coupled with a pipe component, the pipe and sacrificial component are separated at a different location than the coupling interface along the pipe in proximity to the plug. The plug is left coupled to the sacrificial component, and generally slidably engaged with the pipe. The plug and the sacrificial component can be removed from engagement with the pipe. The pipe and the pipe component can be coupled together.

First claim

What is claimed is:

1. A method for reducing ovality changes in a pipe for coupling with a pipe component, the pipe having a plug inserted into a pipe end and fixedly coupled to the pipe at a coupling distance from the pipe end and the pipe further having a sacrificial component coupled to the pipe end, the method comprising:
separating a portion of the pipe from the pipe end coupled to the sacrificial component at a greater distance than the coupling distance, thereby causing the plug to be fixedly coupled to the sacrificial component and not fixedly coupled to the portion of the pipe that is separated from the pipe end; and
removing the plug coupled with the sacrificial component out of an inside of the portion of the pipe separated from the pipe end coupled to the sacrificial component.

2. The method of claim 1 , further comprising coupling the pipe component to the end of the pipe.

3. The method of claim 1 , wherein the pipe has been pre-cut in a middle portion of the pipe to establish an end for insertion of the plug into the pipe and the sacrificial component comprises a portion of the pipe recoupled to the pipe.

4. The method of claim 1 , wherein separating the portion of the pipe comprises separating pipe portion at a position that is greater than a distance of the coupling of the plug with the pipe but less than a distance to a distal end of the plug relative to the pipe end.

5. The method of claim 1 , further comprising identifying a position of the plug in the pipe from the end of the pipe prior to coupling the sacrificial component to the pipe, and using that position to determine the distance for cutting the pipe portion.

6. The method of claim 1 , wherein the plug is recessed inside the pipe longitudinally from the pipe end and coupled to the pipe.

7. The method of claim 1 , further comprising preparing the pipe with the plug and sacrificial component, comprising
inserting the plug into the pipe end of the pipe;
fixedly coupling the plug in the pipe; and
coupling the sacrificial component with the end of the pipe.

Assignees

• Technip France

Inventors

• Paupy Laurent Frank
• Anne Fabien
• Boisne Mathieu
• Keith Eric Christopher

Classifications

• F16L1/12

  Laying or reclaiming pipes on or under water · CPC title

• F16L13/04

  with arrangements preventing overstressing · CPC title

• F16L1/20

  Accessories therefor, e.g. floats or weights · CPC title

• B21D39/046

  Connecting tubes to tube-like fittings · CPC title

• Y10T29/4981

  Utilizing transitory attached element or associated separate material · CPC title