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Observation method of multi-stage depressurization water injection based on fracture observation

A step-down and multi-stage technology, which is applied in measurement, earthwork drilling, wellbore/well components, etc., can solve the problems of poor stability in the conversion process, large range of water pressure conversion, unsuitable control of water pressure, etc., to achieve Improve observation efficiency, avoid destructive effects, and have a wide range of pressure adjustment effects

Active Publication Date: 2021-08-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The on-site detection adopts a series of detection equipment represented by "double-end plugging leak detection device". There are multiple operation and control systems connected to the external end, and there are at least 2 or more pipelines in the corresponding interior. The operation process is cumbersome and There is a winding problem, and the stability is poor during the observation process
In the series of products, although the single circuit problem can be solved, there is a large range of water pressure conversion, the conversion process is not stable, it is not suitable to control the water pressure, and it is easy to cause mechanical failure. The existing technology cannot solve the above problems at the same time.

Method used

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  • Observation method of multi-stage depressurization water injection based on fracture observation
  • Observation method of multi-stage depressurization water injection based on fracture observation
  • Observation method of multi-stage depressurization water injection based on fracture observation

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Embodiment Construction

[0071] The present invention will be described in further detail below in conjunction with specific embodiments.

[0072] Such as Figure 1-3 As shown in , a multi-stage step-down depressurization water injection device based on fracture observation, including a test probe, a propulsion system and a control system;

[0073] The test probe includes an occluder, a partial pressure assembly 49 and a connecting pipe 28, the occluder further includes a front occluder 35, a middle occluder 36 and a tail occluder 37, and the front occluder 35 , the middle occluder 36, the tail occluder 37 and the borehole form the first water injection cavity 29 and the second water injection cavity 34; the partial pressure assembly 49 is installed on the front occluder 35, the middle occluder The tail part of 36 is composed of primary converter 6 and secondary converter 39, which converts the high-pressure water source in the connecting pipe 28 to the low-pressure water source and flows into No. 1 ...

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Abstract

The invention discloses a fracture observation-based observation method for multi-stage step-down water injection. The used device includes a test probe, a propulsion system and a control system. The test probe includes an occluder, a partial pressure assembly and a connecting pipe. A water injection cavity is formed between the occluder and the borehole. The partial pressure assembly is installed at the tail of the front occluder and the middle occluder. Composed of a device and a secondary converter, the high-pressure water source in the connecting pipe is converted in stages to the low-pressure water source flowing into the water injection cavity for detection. The occluder includes a leaking pipe, a rubber bag and a joint. The rubber bag is wrapped around the outside of the leaking pipe, fixed on both ends of the joint by a fastening ring, and forms a sealing cavity with the leaking pipe. The test device uses the same external water source to realize the plugging process and the detection process to work under their respective pressures, and to make the pressure conversion stable, to integrate the plugging and side leakage systems, and to solve the problem of drilling pipe and hose winding during the propulsion process , At the same time, it can realize multi-segment measurement each time, and improve the measurement efficiency.

Description

technical field [0001] The invention belongs to the technical field of rock mass permeability measurement, and in particular relates to an observation method for multi-stage graded depressurization water injection based on fracture observation. Background technique [0002] The measurement of the depth of the mining fracture zone in the mine floor is an important parameter to indicate the occurrence state of coal and rock. It is a key basic parameter in the study of mine water prevention and control. Therefore, in order to study the formation of water-conducting channels in mining surrounding rocks, it is necessary to grasp the law of rock movement and determine the height of mining damage zones. The on-site detection adopts a series of detection equipment represented by "double-end plugging leak detection device". There are multiple operation and control systems connected to the external terminals, and there are at least 2 or more pipelines in the corresponding interior. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B47/00E21B33/122
CPCE21B33/122E21B47/00E21B49/00
Inventor 宋文成梁正召薛瑞雄李迎春唐春安滑笑笑赵慧子
Owner DALIAN UNIV OF TECH
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