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Shaft bottom air current uplift parameter detection device for coal bed gas exhaust and recovery shaft

A technology for parameter detection and extraction wells, which is used in wellbore/well components, measurement, earth-moving drilling and mining, etc., can solve the problems of inability to monitor the flow rate of airflow uplift, and achieve improved real-time control, simple structure, and improved calibration. The effect of precision

Inactive Publication Date: 2015-05-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies mainly monitor the liquid level position of the coalbed methane well, the pressure and temperature of the coalbed methane well, but cannot monitor the flow rate of the gas flow upward

Method used

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  • Shaft bottom air current uplift parameter detection device for coal bed gas exhaust and recovery shaft
  • Shaft bottom air current uplift parameter detection device for coal bed gas exhaust and recovery shaft
  • Shaft bottom air current uplift parameter detection device for coal bed gas exhaust and recovery shaft

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Effect test

Embodiment 1

[0025] Embodiment 1: A coalbed methane drainage well bottomhole gas flow upward parameter detection device of the present invention, its overall composition is as follows figure 1 As shown, it includes a detector 11 installed downhole, a data transmission component, and an uphole data processing and display system. The detector 11 is provided with an electrical part and a physical structure part, and the electrical part of the detector is composed of a target strain sensor, a pressure sensor and a data acquisition conversion board. The physical structure of the detector consists of a cylindrical tube and a collar 10, and the physical structure of the detector is as follows image 3 , 4 , 5, and 6, the outer diameters of the cylindrical pipe and coupling 10 in the tester are the same as those of the oil pipe 15, the two ends of the cylindrical pipe have external threads, the two ends of the coupling 10 have internal threads, and the coupling 10 passes through the internal thre...

Embodiment 2

[0032] Embodiment 2: When the coalbed methane drainage and production well bottomhole gas flow upward parameter detection device of the present invention is used, according to the needs of coalbed methane drilling and production wells, the detector 11 must be placed at the bottom of the well for in-situ real-time detection, and the detector 11 cannot affect the normal production in the well, and the outer diameter of the casing of the detector 11 must match the oil extraction pipe, and it is easy to install and disassemble. The operation steps are as follows:

[0033] (1) After the drilling is completed, determine the coal reservoir that needs to be detected in real time. If it is determined that real-time detection needs to be carried out in the upper coal seam 12 and the lower coal seam 13, then according to the depth of the coal reservoir, the oil extraction pipe corresponding to the coal reservoir Install the detector through the thread respectively; Figure 7 shown. Fi...

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Abstract

The invention relates to a shaft bottom air current uplift parameter detection device for a coal bed gas exhaust and recovery shaft. The shaft bottom air current uplift parameter detection device comprises an underground detection instrument, a data transmission component and a data processing and displaying system, wherein the detection instrument is provided with an electrical appliance part and an entity part; the electrical appliance part is provided with a target type strain sensor, a pressure sensor and a data acquisition converter plate; the entity part consists of a cylindrical tube and a coupling; the sensors are arranged on the cylindrical tube; leads of the sensors are led to the upper surface of the cylindrical tube through lead holes, gathered and connected to the data acquisition converter plate; a multi-path conversion switch, a wave filtering part, an amplifying part, an analog to digital conversion part, a singlechip microprocessor, a serial data transmission circuit and a driving module are arranged in the data acquisition converter plate; the data transmission component is provided with a cable conductor and a driving module; and information is transmitted to the shaft through the cable conductor after being driven through the driving module, and is processed, stored and displayed through an industrial computer of a data processing and displaying system. The device is suitable for recovering coal bed gas, and is suitable for recovering and developing petroleum gas, shale gas and natural gas hydrates.

Description

technical field [0001] The invention relates to a gas flow uplift parameter detection device at the bottom of a coalbed methane drainage well, in particular to a device for directly installing a pressure and flow velocity combined instrument on the bottom well oil pipe to test the gas flow uplift parameter. Background technique [0002] Coalbed methane and related underground gas reservoirs are new energy sources. During the production process of coalbed methane, it is necessary to know the water production, gas production, liquid level and other parameters of coalbed methane wells at any time, so as to adjust production parameters in time according to the production stage and needs. Make the production of coalbed methane wells in the best condition. In recent years, many new technologies have been developed for coalbed methane mining, such as the invention of downhole pressure monitoring devices for coalbed methane wells, unsnubbed liquid level monitoring devices, gas produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B47/12
Inventor 王生维乌效鸣路桂英陶扬张峰李瑞李炯
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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