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Expander system for incremental expansion of a tubular element

A technology of tubular elements and expanders, applied in the field of expander systems

Active Publication Date: 2007-01-31
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This creates some technical and / or economical drawbacks, especially for deep wells where a large number of individual casing sections need to be installed

Method used

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  • Expander system for incremental expansion of a tubular element
  • Expander system for incremental expansion of a tubular element
  • Expander system for incremental expansion of a tubular element

Examples

Experimental program
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Embodiment Construction

[0026] In the drawings, the same reference numerals denote the same components.

[0027] Referring to Figures 1A and 1B, there is shown a pipe expander comprising a steel tubular expander body 2 having a first end 3 and a second end 4. The expander body 2 comprises: a cylindrical portion 2a; a cylindrical portion 2b; a frusto-conical portion 2c located between the cylindrical portions 2a and 2b. The frusto-conical portion 2c tapers in the direction from the first end 3 to the second end 4, changing from a diameter D1 to a diameter D2 which is larger than the diameter D1. The diameter of the cylindrical parts 2a, 2b is substantially equal to D1. A plurality of narrow longitudinal grooves 6 are provided in the expander body 2 , and these grooves are regularly spaced along the peripheral surface of the expander body 2 . Each slot 6 passes radially through the entire wall of the tubular expander body 2 and has opposite ends 7, 8 located at a distance from the corresponding end ...

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PUM

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Abstract

An expander system for radially expanding a tubular element from a first inner diameter to a second inner diameter larger than the first inner diameter, the expander system including an expander movable between a radially retracted mode and a radially expanded mode, wherein the expander includes an expansion surface extending in axial direction of the expander and being operable to expand the tubular element upon movement of the expander from the retracted mode to the expanded mode thereof, the expansion surface being of increasing diameter in axial direction of the expander.

Description

technical field [0001] The present invention relates to a tube expander system for radially expanding a tubular member from a first inner diameter to a second inner diameter greater than the first inner diameter. Background technique [0002] In the industry of extracting hydrocarbon fluids from formations, the expansion technique of tubular elements is increasingly used, wherein a wellbore is drilled into the formation to provide a conduit for carrying hydrocarbon fluids from the reservoir area flows to the above-ground production facility. Traditionally during drilling of a wellbore, such a wellbore is provided with tubular casing segments. Since each successive casing section must pass through the previously installed casing section, the different casing sections have a decreasing diameter in the downward direction, so that these casing sections form an already Known nested structure. Thus, the available diameter for producing hydrocarbon fluids decreases with increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/10B21D39/08B21D31/04B21D39/20
CPCB21D39/20E21B43/105
Inventor W·C·M·洛贝克D·H·齐伊斯林
Owner SHELL INT RES MAATSCHAPPIJ BV