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Construction Method of Underwater Grouting Pad in Inclined Shaft

A construction method and a technology of a slurry stop pad, which are applied in wellbore lining, underground chambers, and shaft equipment, etc., can solve the problems of high drainage cost, difficult quality, and long cycle, and achieve convenient construction, controllable quality, and simple process. Effect

Active Publication Date: 2017-10-13
CHINA INTERNATIONAL WATER & ELECTRIC CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is often used in the case of small water gushing. If the water gushing volume is too large and the water head pressure is too high, not only the drainage is difficult, the drainage cost is high, and the cycle is long, but also the construction of the grout stop pad is difficult, the quality is difficult to guarantee, and the grout stop effect is difficult. Poor, or even unable to effectively construct grout pad, there is a certain risk

Method used

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  • Construction Method of Underwater Grouting Pad in Inclined Shaft
  • Construction Method of Underwater Grouting Pad in Inclined Shaft

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as Figure 1~2 Among them, an underwater grout stop pad construction device for inclined wells, including multiple grouting guide pipes 1, steel pipes with a diameter of 50-100mm are usually used as the grouting guide pipes 1, the length of a single steel pipe is 6-9M, and the grouting guide pipes 1 are connected by a connecting sleeve 2, the connecting sleeve 2 in this example is a socket type connecting sleeve 2, and the connecting sleeve 2 is socketed on the outer wall of the grouting guide pipe 1.

[0028] A sealing rubber pad 3 is provided at the bottom of the lowest grouting guide pipe 1 to keep water from entering the grouting guide pipe 1 during installation, so as to reduce weight and facilitate installation.

[0029] The outer wall of the grouting guide pipe 1 extending into the water is coated with a floating device 5 . The floating device 5 adopts foamed plastics. So that the grouting guide pipe 1 is always in a floating state during the underwater in...

Embodiment 2

[0034] On the basis of the device in Example 1, a method for using the above-mentioned inclined well underwater grout stop pad device to carry out the grout stop pad construction includes the following steps:

[0035] 1. Install the grouting guide pipe 1, connect multiple grouting guide pipes 1 through the connecting sleeve 2, the connecting sleeve 2 is sleeved on the ends of the two grouting guide pipes 1, and welded with the grouting guide pipe 1 .

[0036] Bind the floating device 5 on the outer wall of the grouting guide pipe 1, and install the sealing rubber pad 3 at the bottom of the lowest grouting guide pipe 1;

[0037] Preferably, a guide head 4 with rounded or chamfered edges is provided at the bottom end of the lowest grouting guide pipe 1 to prevent the bottom end of the grouting guide pipe 1 from colliding with the well pipeline or the well wall and being blocked during installation.

[0038] 2. Set up a drilling rig platform and a grouting platform at the static...

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Abstract

The invention provides an underwater grout stop pad construction device and construction method for an inclined well, which includes a plurality of grouting guide pipes, the grouting guide pipes are connected by connecting sleeves, and a sealing glue is provided at the bottom of the lowest grouting guide pipe The pad is covered with a floating device on the outer wall of the grouting guide pipe extending into the water. The construction includes the following steps: installation of the grouting guide pipe; setting up the drilling rig platform and the grouting platform at the static water level, and arranging the drilling rig. Drilling; underwater grouting; drainage after being strengthened; through the above steps, the construction of the underwater grouting pad of the inclined well is realized. In the present invention, by using the above-mentioned device, static water grouting is carried out to complete the construction of the grouting grout stop pad, so that the water stop construction is completed in the static water state, the process is simple, the construction is convenient, safe and reliable, and the quality is controllable.

Description

technical field [0001] The invention relates to the field of inclined well construction, in particular to a method for constructing an underwater grout stop pad for inclined wells. Background technique [0002] In general, when the inclined shaft (lane) is constructed with water inrush and flooded, the construction needs to be resumed, and the method of grouting is usually adopted. Before grouting, a grout stop pad must be constructed first to meet the requirements of the grouting construction process. At present, the commonly used method is the forced drainage and precipitation method, that is, to use the drainage equipment to force the drainage, reduce the water level to the water outlet point, and then construct the grout stop pad according to the design requirements. This method is often used in the case of small water gushing. If the water gushing volume is too large and the head pressure is too high, not only the drainage is difficult, the drainage cost is high, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/38
Inventor 王宗敏曲振亭王乃伦王江张英朱小春
Owner CHINA INTERNATIONAL WATER & ELECTRIC CORPORATION