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Method for expanding tubular piece in well

A technology of tubular parts and wellbore, which is applied in the direction of wellbore/well parts, earthwork drilling, production fluid, etc., and can solve the problems of inner surface damage and high expansion force of the tubular part of the expander

Inactive Publication Date: 2009-02-04
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experience has shown that the required expansion force applied by the expander to the tubular member can be very high and, therefore, may result in damage to the expander and / or to the inner surface of the tubular member

Method used

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  • Method for expanding tubular piece in well

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Embodiment Construction

[0015] In the drawings and the detailed description that follows, like reference numerals designate like elements. Furthermore, it should be understood that the terms "below", "above", "upwardly" and "downwardly" refer to the depth of the borehole as measured along the longitudinal axis of the borehole and relative to the surface.

[0016] Referring to Figure 1 , a wellbore 1 for producing oil or gas from a formation 2 is shown. An expandable casing 4 extends from a wellhead 6 on the surface to near the lower end of the wellbore 1 , wherein the casing 4 is sealingly connected to the wellhead 6 . A tube expander 8 for radially expanding the sleeve 4 is positioned in the sleeve 4, wherein the expanded portion 10 of the sleeve 4 extends under the expander 8, and the unexpanded portion 12 of the sleeve 4 extends under the expander. The tube 8 extends above. The lower end of the expanded casing portion 10 is closed by a packer 13 .

[0017] The tube expander 8 tapers in an upwar...

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PUM

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Abstract

A method is provided of radially expanding a tubular element (4) extending into a wellbore formed in an earth formation, comprising the steps of arranging an expander (8) in the tubular element (4) , the expander (8) being operable to exert a radial force to the inner surface of the tubular element (4) , and radially expanding the tubular element by pressurising the interior of the tubular element (4) and simultaneously operating the expander (8) to exert said radial force to the inner surface of the tubular element . The expander (8) is operated to exert said radial force to the inner surface of the tubular element (4) independently from pressurising the interior of the tubular element.

Description

technical field [0001] The present invention relates to a method of radially expanding a tubular member extending into a wellbore formed in an earth formation, wherein an expander located in the tubular member is used to apply a radial force on the inner surface of the tubular member . Background technique [0002] Wellbores used to produce hydrocarbon fluids are traditionally provided with one or more casings to provide stability to the wellbore wall, and / or to provide isolation of pay zones between different formation zones. Typically, several casings are arranged at different depth intervals in a nested arrangement, with each subsequent casing having a smaller diameter than the preceding casing to allow the casing to be lowered through the preceding casing. [0003] Radially expanding the tubular member in the wellbore has recently been practiced, for example, as a cladding against an existing casing section. Additionally, it has been proposed to construct single diamet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/10
CPCE21B43/105
Inventor P·D·希尔特
Owner SHELL INT RES MAATSCHAPPIJ BV