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High-water-level long spiral well completion construction process

A construction technique and long helical technology, applied in drilling equipment, flushing wellbore, wellbore/well components, etc., can solve the problems of hole collapse and poor protection effect of the sidewall of the drilled hole, so as to improve the efficiency and speed up the construction efficiency. Effect

Pending Publication Date: 2021-07-30
中基发展建设工程有限责任公司
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AI Technical Summary

Problems solved by technology

[0003] However, when some boreholes with high groundwater levels and deep boreholes are used for construction, the protection effect of the mud on the sidewall of the borehole is poor, and there will still be problems of hole collapse during the drilling process.

Method used

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  • High-water-level long spiral well completion construction process
  • High-water-level long spiral well completion construction process
  • High-water-level long spiral well completion construction process

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Embodiment Construction

[0040] The following is attached Figure 1-5 The application is described in further detail.

[0041] The embodiment of the present application discloses a high-water-level long-spiral well-forming construction technology.

[0042] S1, drilling

[0043] Drilling is carried out with a long auger drilling rig. According to the design dimensions of the diameter and depth of the well, and in combination with the height of the groundwater level, a corresponding type of long auger drilling rig is selected. In this embodiment, the long auger drilling rig of model JZB90 is used as an example.

[0044] Before drilling, the surface should be cleaned and leveled according to the location of the water intake well, and the location of the water intake well should be marked. After moving the drilling rig to the designated position, do a good job of machine leveling, equipment layout, equipment stacking, etc., and then position the drill pipe of the drilling rig and adjust the verticality ...

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Abstract

The invention relates to a high-water-level long spiral well completion construction process, and belongs to the technical field of water intake well construction. The construction process comprises the following construction steps: a long spiral drilling machine is used for drilling to a designed depth; a drill rod is pulled out of a drill hole, and slurry is poured into the drill hole; after the drill rod is completely pulled out, a permeable pipe is put down into the drill hole; high-concentration slurry in the drill hole is replaced with low-concentration slurry; an annular gap between the permeable pipe and the drill hole is filled with gravel; and clean water is used for well washing operation. The long spiral drilling machine is adopted for drilling construction, compared with a direct circulation drilling machine or a reverse circulation drilling machine, a drilled hole is formed at a time, the drill rod of the long spiral drilling machine is continuously located in the drilled hole in the drilling process, the drill rod plays a role in supporting the side wall of the drilled hole, and the phenomenon that the drilled hole collapses is not prone to occurring.

Description

technical field [0001] The application relates to the field of water intake well construction, in particular to a high water level long spiral well construction process. Background technique [0002] At present, in the construction process of water intake wells, most of them use positive circulation drilling rigs or reverse circulation drilling rigs to drill holes. During the drilling process, mud will be used to form a retaining wall in the drilling hole to protect the side wall of the drilling hole and prevent the side wall of the drilling hole from being damaged. There is a problem of collapsing holes. [0003] However, when some boreholes with a higher groundwater level and a deeper borehole size are used for construction, the protection effect of the mud on the sidewall of the borehole is poor, and the problem of hole collapse during the drilling process still exists. Contents of the invention [0004] In order to avoid hole collapse during the drilling process, the ...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B21/00E21B33/138
CPCE21B7/00E21B21/00E21B33/138
Inventor 刘勇朱益江金双明本亚辉张海军王鸿程韩永亮
Owner 中基发展建设工程有限责任公司
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