High-accuracy measuring device for multiple stages of flow for water pressure test in boreholes and method

A pressurized water test and measuring device technology, which is applied in the direction of volume flow measuring device, measuring device, liquid/fluid solid measurement, etc., can solve the problems of low accuracy of the flow measurement system and the inability to measure the flow of multiple orders of magnitude at the same time, and achieve The effect of improving data accuracy, improving precision, and improving work efficiency

Active Publication Date: 2017-07-07
BEIJING RES INST OF URANIUM GEOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a multi-stage flow high-precision measurement device and method for the borehole pressurized water test, which can solve the problems of low precision of the existing flow measurement system and the inability to simultaneously measure the flow of multiple orders of magnitude

Method used

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  • High-accuracy measuring device for multiple stages of flow for water pressure test in boreholes and method

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Effect test

Embodiment 1

[0033] Step 1. Before the start of the test, ensure that the valve submersible pump return pipe valve 1, the front control valve of the flowmeter one 5, the rear control valve one 7 of the flowmeter, the flowmeter main control valve one 14, the flowmeter main control valve two 15, and the third stage The electromagnetic flowmeter protection valve 16 is in an open state;

[0034] Valve pressure water pressure control valve 2, flow meter front control valve 2 8, flow meter rear control valve 2 10, flow meter front control valve 3 11, flow meter rear control valve 3 13, water flow output control valve 30 in the closed state;

[0035] Record the mass number of the electronic balance 33 at this moment;

[0036] Step 2, connect the submersible pump 37, fill the drill pipe 18 with water for pressurized water test; open the valve pressurized water pressure control valve 2, control valve 1 before the flow meter, control valve 1 after the flow meter 7, gas input control Valve two 25, g...

Embodiment 2

[0048] Pressurized water test under other pressure conditions, the steps are as follows: close the gas pressure control valve 28, water flow output control valve 30; adjust the pressure reducing valve 2 27 to the set pressure; open the gas pressure control valve 28, and inflate the high pressure resistant sealed container 32 ; When the internal gas pressure gauge 29 shows that the air pressure in the high-pressure resistant sealed container 32 reaches the set pressure, open the water flow output control valve 30; at this time, repeat steps 8 to 10.

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Abstract

The invention belongs to the technical field of pressurized-water flow measuring, in particular to a high-accuracy measuring device for multiple stages of flow for water pressure test in boreholes and method. The high-accuracy measuring device comprises a valve of a water return pipe of a submersible pump, a pressurized-water pressure control valve, a high-pressure glue pipe, a pre-control valve of a flowmeter, the flowmeter, a post-control valve of the flowmeter, a pressurized-water test drill rod, a high-pressure-resistant sealing container, an electric balance and the submersible pump. The high-accuracy measuring method is a water pressure test on the basis of the high-accuracy measuring device. The high-accuracy measuring device for multiple stages of flow for water pressure test in boreholes and method help solve the existing problems so that a flow measuring system has high accuracy and a plurality of flows in orders of magnitudes can be measured at the same time.

Description

technical field [0001] The invention belongs to the technical field of pressurized water flow measurement, and in particular relates to a multi-stage flow high-precision measurement device and method for a borehole pressurized water test. Background technique [0002] Geological disposal of radioactive waste, CO 2 Low-permeability rock mass is often selected as the field of pre-underground engineering research for geological storage and strategic petroleum reserves. The study of the permeability characteristics of fractured rock mass is one of the key scientific issues for repository site selection and performance evaluation. The permeability coefficient is an important parameter describing the permeability of fractured rock mass, which is usually obtained by means of a water pressure test, and the steady flow rate during the water pressure process is one of the important parameters for calculating the permeability coefficient. Therefore, how to accurately and high-precisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F7/00
CPCG01F7/00
Inventor 苏锐季瑞利张明李杰彪周志超
Owner BEIJING RES INST OF URANIUM GEOLOGY
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