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Full Well Expandable Screen

A full well section and screen technology, applied in the direction of drill pipe, casing, drilling equipment, etc., can solve the problem of poor sand control effect and achieve the effect of meeting the connection requirements

Active Publication Date: 2018-01-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a full-well expandable screen to solve the problem that there is a sand ring between the screen and the casing annulus or the wellbore annulus, and the sand control effect is poor.

Method used

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Embodiment Construction

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0028] like figure 1 As shown, the present invention proposes a full well section expandable screen, and the full well section expandable screen includes:

[0029] The body 5 (or the base pipe) is tubular, and the side wall of the body is provided with slots (body slots);

[0030] Coupling 1, connected to the first end of the body ( figure 1 The lower end of the middle), the side wall of the coupling is provided with slots (coupling slots);

[0031] The filter layer 4 is surrounded by the body and functions as a filter;

[0032] The expansion ring 6 is, for example, threaded at the second end of the body ( figure 1 The upper end of the middle); it can prevent the radial shrinkage of the threads during the expansion process and after the completion of the well, and...

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Abstract

The present invention provides a full well section expandable screen, which comprises: a main body (5); a coupling (1), connected to the first end of the main body, the side of the coupling The wall is provided with collar slits; the filter layer (4) surrounds the body; the expansion ring (6) is connected to the second end of the body; the protective sleeve (2) is sleeved on the joint In addition to the hoop (1), the filter layer (4), and the body (5), the protective cover (2) includes: a first section, a second section, and a third section connected in sequence, and the first section One segment is sleeved outside the collar (1), and the side wall of the first segment is closed, the second segment is sleeved outside the filter layer (4), and the first segment The side wall of the second section is provided with a protective sleeve slot, and the third section is sheathed outside the second end of the body. The invention has the effects of large well completion diameter, no sand ring, small flow resistance, obvious oil increase and the like.

Description

technical field [0001] The invention relates to the field of oil and natural gas exploitation, in particular to an expandable screen, especially an expandable screen for the whole well section. Background technique [0002] At present, during the exploitation of oil reservoirs, most oil wells in sandstone oil reservoirs have sand production problems. The existing traditional mechanical sand control is to build a sand retaining barrier in the wellbore. At present, there are the following problems: there is a sand ring in the annulus between the screen and the casing (or the inner wall of the wellbore), which increases the flow resistance of oil flow and affects the production of oil and gas wells; The sand is stuck, causing oil well overhaul; chemical sand control will bring some pollution to the formation, the success rate is relatively low, and the validity period of sand control is short. [0003] To sum up, the following problems exist in the prior art: in the existing s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/08E21B17/02
Inventor 韩宗正吴志勇张建军孙厚利丁晓孟雪尹剑峰吕民王培凇于立江王德伟孙立军徐立清孟月月李鹏日
Owner PETROCHINA CO LTD
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