A downhole expandable tubular
A technology of expanding pipe and well pipe, applied in wellbore/well components, production fluid, earth-moving drilling, etc., can solve problems such as sealing performance is not as good as expected, sealing elements are deviated, and it is difficult to control sealing elements.
Inactive Publication Date: 2015-12-02
WELLTEC OILFIELD SOLUTIONS AG
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But experience has taught us that it is very difficult to control the position of the sealing element during the expansion of the expandable tubular structure, so that the sealing element may deviate from its intended position, thereby risking that the sealing performance is not as good as expected
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0075] figure 1 It shows that the downhole expandable tubular structure 1 according to the present invention is in the unexpanded position ( figure 1 on the left) and on the inflated position ( figure 1 The section on the right). The downhole expandable tubular structure 1 needs to start from the first outer diameter D downhole 1 expand to second outer diameter D 2 , so as to abut against the inner surface 2 of the wellbore in this embodiment.
[0076] The downhole expandable tubular structure 1 has a longitudinal extension direction 1 and comprises at least one first circumferential edge 3 and at least one second peripheral edge 3 arranged on the outer surface 5 of the downhole expandable tubular structure 1 and spaced apart along the longitudinal extension direction. Circumferential edge4. Furthermore, a sealing element 6 and an open annular retaining element 7 are arranged between the first and the second circumferential edge 3 , 4 . The open annular retaining element...
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
Login to View More Abstract
The present invention relates to a downhole expandable tubular to be expanded in a well downhole from a first outer diameter to a second outer diameter for abutting against an inner face of a casing or borehole, the downhole expandable tubular having an outer face and a longitudinal extension, and comprising at least one first circumferential edge and at least one second circumferential edge provided on the outer face and spaced apart in the longitudinal extension, wherein a sealing element and a split ring-shaped retaining element are arranged between the first and second circumferential edges, and wherein the split ring-shaped retaining element has more than one winding, so that when the expandable tubular is expanded from the first outer diameter to the second outer diameter, the split ring-shaped retaining element partly unwinds. Furthermore, the present invention relates to an annular barrier.
Description
technical field [0001] The present invention relates to a downhole expandable tubular structure to be expanded downhole. Furthermore, the invention also relates to an annular barrier. Background technique [0002] In wellbores, expandable tubular structures are used for different purposes, such as for sealing openings in the casing in the form of patches or liners, for sealing the gap between the inner and outer tubular structures in the form of annular barriers. Either to provide a barrier to flow between the inner tubular structure and the inner wall of the wellbore, or to provide a liner hanger. [0003] When the expandable tubular structure is used to seal eg openings or areas, separate sealing elements are often provided on the outer surface of the expandable tubular structure to enhance the sealing performance. But experience has taught us that it is difficult to control the position of the sealing element during expansion of the expandable tubular structure, so that...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/10
CPCE21B43/103E21B29/10E21B33/1208E21B33/1212
Inventor J·哈伦德巴克L·斯泰尔
Owner WELLTEC OILFIELD SOLUTIONS AG