A layered water-stopping device and layered water-stopping process for deep holes

A water-stopping device and water-stopping technology, applied in wellbore/well parts, sealing/packing, earthwork drilling and production, etc., can solve problems such as unusable drilling, difficulty in layered water-stopping, water-stopping failure, etc., and achieve improvement Water-stop effect, easy installation, and effect of improving accuracy

Active Publication Date: 2022-07-05
江苏长江地质勘查院
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problem of layered water-stopping difficulties, which may easily cause water-stopping failure and make it impossible to use drilling to extract brine, the present invention provides a layered water-stopping device and a layered water-stopping process for deep holes

Method used

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  • A layered water-stopping device and layered water-stopping process for deep holes
  • A layered water-stopping device and layered water-stopping process for deep holes
  • A layered water-stopping device and layered water-stopping process for deep holes

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Embodiment Construction

[0024] The technical solutions of the present invention will be described in detail below through the examples, but the protection scope of the present invention is not limited to the examples.

[0025] like Figure 1-6 As shown, the present invention is a layered water-stopping device for deep holes, comprising three casings with a water filter pipe 4 and a well wall pipe 3, which are successively smaller in diameter from top to bottom, the water filter pipe 4 and the well wall pipe 3 is a threaded connection, two adjacent sleeves are connected by a reducing part, an annular tray 6 is welded to the outer peripheral wall of the upper end of the lower sleeve in the adjacent two sleeves, and the lower end of the upper sleeve is welded on the tray 6, the tray 6 That is, it becomes the said diameter reducing part. The upper end of the lower casing of the two adjacent casings is provided with an upward annular convex edge, and an external thread is arranged on the convex edge to f...

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Abstract

The invention discloses a layered water-stopping device for deep holes and a water-stopping process using the same. The diameter-reducing part of the sealing connection, the upward annular flange of the upper end of the lower sleeve arranged in the two adjacent sleeves, the water stop pipe detachably connected to the annular flange in a sealing manner, and the sealing pipe used for blocking the adjacent two sleeves Removable bridge plugs for ports on the lower casing in After using the device to stop water by the process of the present invention, the water-stopping effect is improved and it is suitable for deep brine wells, and at the same time, the drilling wells can be directly transformed into brine mining wells to avoid waste of resources.

Description

technical field [0001] The invention belongs to the field of hydrogeological drilling, and particularly relates to a layered water-stopping device for deep holes and a layered water-stopping process. Background technique [0002] With the gradual development of the exploration and development of brine potash mines in western my country, the complexity of the ore bed and strata makes the original drilling technology that can be used for shallow exploration unable to be effectively used for deep exploration and development. In recent years, in the deep brine exploration and development activities in western my country, the drilling and well-forming technology has become a bottleneck restricting the exploration and development work. [0003] Usually, the following problems are encountered during the construction of the brine sylvite mine exploration well: the brine sylvite mine is deeply buried, the maximum depth can reach more than 1500m; the ordinary drilling process is diffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 陈洁赵春永袁振丽梅玲章颖李慧娥钟密于腾腾
Owner 江苏长江地质勘查院
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