Horizontal well open hole screen casing damaging detection tubular column

A damage detection, horizontal well technology, applied in wellbore/well components, surveying, earthmoving, etc., to ensure continuity

Active Publication Date: 2018-08-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching, no special technology for detecting screen damage was found, but a visual screen strength detection device was found, publication number 205374161U, public date 2016-07-06

Method used

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  • Horizontal well open hole screen casing damaging detection tubular column
  • Horizontal well open hole screen casing damaging detection tubular column
  • Horizontal well open hole screen casing damaging detection tubular column

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Embodiment Construction

[0020] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.

[0021] according to Figures 1 to 3 , the horizontal well open hole screen breakage detection string is mainly composed of a high pressure self-sealing device 2, a liquid flow conversion device 8, a flow blocking packer 21 and a perforated pipe 25.

[0022] The high-pressure self-sealing device 2 is composed of a pressure cap 3 , a self-sealing support ring 4 , a sealing core 5 , a self-sealing body 6 and a self-sealing flange 9 . Wherein, the self-sealing body 6 is provided with a self-sealing outlet 7, which is used as a liquid outflow channel during the detection process. The lower part of the high-pressure self-sealing device 2 is connected with the wellhead spool 11 through the self-sealing flange 10, and the s...

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Abstract

The invention discloses a horizontal well open hole screen casing damaging detection tubular column. The tubular column includes a high-pressure self-sealing device, a liquid flow conversion device and choked flow packers which are successively connected from top to bottom. Two choked flow packers are arranged at the inner wall of the screen casing and play a role in isolation, and a punching pipeis connected between the two choked flow packers; a radial liquid flow hole is formed in the punching pipe; and an oil pipe communicates to stratum space through the liquid flow hole of the punchingpipe and screen openings of the screen casing. The tubular column can rapidly and accurately detect damage parts of an underground sand control screen casing, and on the basis of effective detection of the leakage points of the sand control screen casing, low cost governing can be carried out, the sand control life of the horizontal well can be lengthened, and capacity advantages of the horizontalwell can be fully exerted.

Description

technical field [0001] The invention relates to a downhole oil screen pipe detection operation pipe string, in particular to a horizontal well open hole screen pipe damage detection pipe string. Background technique [0002] Horizontal well open-hole screen completion, as a sand control completion technology, has become the main method for the development of horizontal wells in major oilfields. The number of horizontal wells accounts for 63% of the total number of wells, and most of them are distributed in heavy oil and water flooding reservoirs. With the prolongation of production time, the intensity of liquid production increases, especially in the process of acid washing and multiple rounds of steam injection huff and puff in heavy oil reservoirs, which can easily lead to local damage to sand control screens. Conventional remedial techniques for such sand control screen failure wells are mostly frequent sand flushing and pump inspection or general sand control of the who...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00
CPCE21B47/00Y02E10/10
Inventor 谢金川吴建平李常友陈刚魏庆彩马丁王东杨军韩宏张锡娟
Owner CHINA PETROLEUM & CHEM CORP
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