Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of radially expanding a tubular element

A tubular part, radial expansion technology, applied in the direction of tubular elements, wellbore/well parts, pipes/pipe joints/pipe fittings, etc., can solve the problem of the expander being stuck in the tubular part

Inactive Publication Date: 2009-07-22
SHELL INT RES MAATSCHAPPIJ BV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach can result in the need to overcome high frictional forces between the expander and the inner surface of the tubular part
Furthermore, there is also the risk of the expander getting stuck in the tubular part

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of radially expanding a tubular element
  • Method of radially expanding a tubular element
  • Method of radially expanding a tubular element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] see figure 1 , which shows a system comprising a wellbore 1 formed in an earth formation 2 and a radially expandable tubular in the form of an expandable steel liner 4 extending down from the surface 6 into the wellbore 1 part. The liner 4 has a radially expanded tubular section 10 and a remaining tubular section extending within the expanded section 10 in the form of an unexpanded section 8 . The walls of the unexpanded section 8 are bent at their lower end radially outwards and in axially opposite directions, ie upwards, forming a U-shaped lower section 11 interconnecting the unexpanded section 8 and the expanded section 10 . The U-shaped lower section 11 delimits the bending region 9 of the tubular part 4 . Due to the expansion process, the expanded liner section 10 is axially fixed to the wellbore wall 12 by means of friction between the liner section 10 and the wellbore wall 12 . Alternatively or additionally, the expanded liner section 10 may be anchored to the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method of radially expanding a tubular element extending into a wellbore formed in an earth formation. The method comprises inducing the wall of the tubular element to bend radially outward and in axially reverse direction so as to form an expanded tubular section extending around a remaining tubular section of the tubular element, wherein said bending occurs in a bending zone of the tubular element. The method further comprises increasing the length of the expanded tubular section by inducing the bending zone to move in axial direction relative to the remaining tubular section. Said wall includes a material that is plastically deformed in the bending zone during the bending process so that the expanded tubular section retains an expanded shape as a result of said plastic deformation.

Description

technical field [0001] The present invention relates to a method of radially expanding a tubular member. Background technique [0002] Expansion of tubular elements is used in various technical fields, such as the industry for the production of oil and gas from wellbores formed in earth formations. The wellbore is typically provided with one or more casings or liners to provide stability to the wellbore wall and / or to provide zonal isolation between layers of different formations. The terms "casing" and "liner" relate to tubular components used to support and stabilize the wellbore wall, whereby it is generally understood that the casing extends from the surface into the wellbore and the liner extends further into the wellbore from a downhole location. In this document, however, the terms "casing" and "liner" are used interchangeably without this deliberate distinction. [0003] In conventional wellbore configurations, multiple casings are placed in intervals at different ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/10F16L55/165
CPCE21B43/103E21B43/105F16L55/165
Inventor P·C·克里塞尔斯
Owner SHELL INT RES MAATSCHAPPIJ BV