Drilling/feed drill/withdrawing drill sealing device for high pressure water rock layer and grouting withdrawing drill method

A sealing device, high-pressure water technology, applied in drilling equipment and methods, sealing/isolation, drilling equipment, etc., to achieve the effect of solving safe drilling, increasing safety factor, and reducing operation difficulty

Inactive Publication Date: 2010-05-12
HANGZHOU HUANENG SAFETY ENG POLYTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the annular gap is small, and the drilling arrangement has various orientations and inclinations, it is difficult for the drill pipe and the orifice sealer to be completely concentric, and the surface finish of the drill pipe is poor, which will inevitably lead to increased friction between the drill pipe and the sealing ring. Damaged sealing system
When withdrawing the drill, due to the need for the operator to operate close by, due to insufficient sealing, high-pressure water can easily cause safety accidents

Method used

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  • Drilling/feed drill/withdrawing drill sealing device for high pressure water rock layer and grouting withdrawing drill method
  • Drilling/feed drill/withdrawing drill sealing device for high pressure water rock layer and grouting withdrawing drill method

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Embodiment Construction

[0016] The "connecting hand" described in this article is a connecting device for connecting two drill pipes, which is a general-purpose part.

[0017] see figure 1 . In this paper, "hydraulic internal expansion sealing plug or air pressure internal expansion sealing plug" is abbreviated as "hydraulic (air) pressure internal expansion sealing plug".

[0018] The device of the present invention comprises an orifice tube rear section 10, further comprising:

[0019] The front section 20 of the orifice tube, the front section 20 of the orifice tube is provided with a sealing ring 1 and a pressure sealing device, and the pressure sealing device is a liquid (gas) pressure internal expansion sealing plug 3;

[0020] A high-pressure valve 4, one end of the high-pressure valve 4 is connected to the front section 20 of the orifice pipe through a flange, and the other end is connected to the rear section 10 of the orifice pipe through a flange.

[0021] The hydraulic (air) pressure ...

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Abstract

The disclosed equipment and method is in use for solving issues of safe boring, adding drill pipe, and throwing back drill pipe when high-pressure water exists. The invention includes seal ring setupinside front segment of orifice pipe, and high-pressure valve connected in series between front segment of orifice pipe and back segment of orifice pipe. Beneficial effects are that when carrying outoperations of boring, adding drill pipe, and throwing back drill pipe in rock layer of containing high pressure water, the disclosed equipment and method can block out high pressure water, reduce operational difficulty, and increase safety factor. Preventing high-pressure water in rock layer from leakage outwards, the invention solves throwing back drill pipe safely when high-pressure water occurs.

Description

technical field [0001] The invention relates to construction machinery technology, in particular to a technology for safely withdrawing drill holes in grouting construction. Background technique [0002] During the grouting drilling construction process, when drilling to the water seepage layer, due to the extremely high water pressure in the rock formation, the safety problem is very serious when withdrawing the drill pipe (abbreviated as withdrawing the drill). Sealing ring, relying on the tight cooperation between the sealing ring and the drill pipe to solve the sealing problem. This method is no problem at rest and low pressure (below 2MPa). However, the rotation and impact of the drill pipe during the drilling process has always been working in the sealing ring, and this process also needs to be closely matched. Because the annular gap is small, and the drilling arrangement has various orientations and inclinations, it is difficult for the drill pipe and the orifice ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E21B33/00
Inventor 李乔斌熊泽树姚茂林罗艳波
Owner HANGZHOU HUANENG SAFETY ENG POLYTRON TECH CO LTD
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