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Device and method utilizing icebound embolisms to plug drill hole in subsection mode

A plugging device and plugging technology, applied in the directions of sealing/isolation, earth-moving drilling, wellbore/well components, etc., can solve the problems of insufficient measurement accuracy, complex and changeable geological conditions, and double-plug sealing discount, etc. Achieve accurate and stable measurement results, solve the problem of large test parameters and low cost

Inactive Publication Date: 2013-05-22
HOHAI UNIV
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AI Technical Summary

Problems solved by technology

However, due to the different construction techniques of the boreholes and the complex and changeable geological conditions, the walls of the boreholes are not always smooth, and the sealing performance of the double plugs is greatly reduced, resulting in insufficient measurement accuracy.

Method used

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  • Device and method utilizing icebound embolisms to plug drill hole in subsection mode

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Embodiment Construction

[0016] refer to figure 1 , one A device and method for segmentally blocking a borehole by using an ice-sealing plug, comprising a high-pressure gas cylinder 1, a check valve 2, a pressure gauge 3, and a blocking device. The blocking device includes a frozen brine tank 4, an insulating water inlet conduit 5, an insulating Outlet conduit 6, first plug 7, second plug 8, floral tube 9 and water valve 10; high-pressure gas cylinder 1, check valve 2, pressure gauge 3 and frozen brine tank 4 communicate in sequence; first plug 7 and second plug The plug 8 is connected through the floral tube 9, the frozen brine tank 4, the first plug 7 and the second plug 8 are connected in turn through the heat preservation water inlet conduit 5, and the second plug 8, the first plug 7 and the water valve 10 are also connected through the heat preservation The water outlet conduits 6 are connected successively.

[0017] Preferably, a perforated hole 9-1 is formed on the floral tube 9 between the ...

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Abstract

The invention discloses a device and a method utilizing icebound embolisms to plug a drill hole in a subsection mode. The device comprises a high-pressure air cylinder, a single-way valve, a pressure gage and a plugging device, the plugging device comprises a freezing brine tank, a heat preservation water inlet guide pipe, a heat preservation water outlet guide pipe, a first embolism, a second embolism, a floral tube and a water valve, and the high-pressure air cylinder, the single-way valve, the pressure gage and the freezing brine tank are communicated in sequence. The first embolism is connected with the second embolism through the floral tube, and the freezing brine tank, the first embolism and the second embolism are successively communicated through the heat preservation water outlet guide pipe. The device is simple in structure, low in cost and easy to operate, utilizes the method that the drill hole is plugged through the icebound embolism to resolve the problem that seal performance is poor when the drill hole is plugged through a embolism, effectively resolves the problems of water leakage of the embolism and too large leakage measuring parameters caused by leakage flowing around the embolism, and enables measured results to be accurate and stable.

Description

technical field [0001] The invention relates to the field of geotechnical engineering parameter detection, in particular to a device and method for segmentally blocking boreholes with ice-sealing plugs. Background technique [0002] The pressure water method is generally used to measure the permeability coefficient of rock and soil mass and geotechnical structures with small permeability coefficient by drilling holes on site. According to the "Water Conservancy and Hydropower Engineering Drilling Pressurized Water Test Regulations SL25-92", in the pressurized water method, the requirements for drilling and plugging are relatively strict. If diamond drilling is used, the rock is hard, the hole wall is complete, and the continuous drilling depth does not exceed 40m etc. However, due to the different construction techniques of the boreholes and the complex and changeable geological conditions, the walls of the boreholes are not always smooth, and the sealing performance of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/10
Inventor 黄德文陈亮林家彬赵小龙詹泸成季纯波
Owner HOHAI UNIV
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