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Method and system for sealing an annulus around a tubular element

A tubular element, annulus technology, applied in the direction of pipe elements, drilling equipment and methods, pipes/fittings/fittings, which can solve the problems of non-uniform filling of annulus, lack of continuous flow path, etc.

Inactive Publication Date: 2016-10-12
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, pumping cement slurry into a small annulus can result in non-uniform filling of the annulus
Additionally, the everted tubing may engage the borehole wall along at least a portion of its length such that the annulus may lack a continuous flow path from its downhole end to the surface

Method used

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  • Method and system for sealing an annulus around a tubular element
  • Method and system for sealing an annulus around a tubular element
  • Method and system for sealing an annulus around a tubular element

Examples

Experimental program
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Embodiment Construction

[0041] In the drawings and description, the same reference numerals refer to the same parts.

[0042] figure 1 A wellbore 1 formed in a subterranean formation 2 is shown. A radially expandable tubular element 4 , such as an expandable steel liner, extends from the surface 6 down into the wellbore 1 . The tubular element 4 comprises an unexpanded tubular section 8 and a radially expanded tubular section 10 . The unexpanded section 8 extends within the expanded section 10 . Preferably, the outer diameter of the expanded tubular section 10 is substantially equal to the diameter of the borehole 1 .

[0043] although figure 1 The borehole shown in Fig. 2 extends vertically into the formation 2, however, the invention is equally applicable to any other borehole. For example, the borehole 1 may extend at least partially along a horizontal direction. In the following, the upper end of the borehole refers to the end at the surface 6 and the lower end refers to the downhole end. ...

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PUM

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Abstract

The present invention relates to methods and systems for sealing an annulus surrounding a tubular element in a wellbore. The method comprises the steps of: i) introducing a first drilling fluid into the wellbore; ii) drilling an open hole section of the wellbore using a drilling tool suspended at the end of the tool string; iii) introducing a second drilling fluid comprising particles pumping a second drilling fluid into the wellbore; iv) filtering particles out of the second drilling fluid near the downhole end of the tubular element; v) extending the tubular element into the open hole section of the wellbore while simultaneously At least a portion of the filtered particles are directed to the annulus between the tubular element and the borehole wall. Steps i) to v) can be repeated as many times as desired.

Description

technical field [0001] The present invention relates to a system and method for sealing an annulus surrounding a tubular element. The system and method can be applied to zonal isolation along a liner in a wellbore. Background technique [0002] The technique of radially expanding tubular elements finds increasing application in the industry for the production of oil and gas from subterranean 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 different earth formations. The terms "casing" and "liner" refer to tubular elements used to support and stabilize the walls of a wellbore. Typically, the casing extends from the surface into the wellbore, while the liner extends further into the wellbore from a certain depth. However, in the context of this document, the terms "casing" and "liner" are used interchangeably without any specific distinction. [0003] In co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/20E21B43/10F16L55/165B29C63/36
CPCE21B7/20E21B43/103E21B21/002E21B43/108
Inventor P·C·克里塞尔斯S·A·哈特曼E·K·科内利森D·萨什德哈
Owner SHELL INT RES MAATSCHAPPIJ BV