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Underground explosion limit fast measuring device and method

A measuring device and blasting technology, which is applied in earthwork drilling, boreholes/well components, buildings, etc., can solve problems such as underground blasting, well wall collapse, casualties, etc., achieve high accuracy, promote low cost, The effect of portable equipment

Inactive Publication Date: 2019-01-11
SOUTHWEST PETROLEUM UNIV
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  • Claims
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Problems solved by technology

However, due to the characteristics of downhole high temperature and high pressure and various factors in the drilling process, any oil and gas layers encountered during gas drilling may cause downhole explosions, resulting in damage to drilling tools, collapse of well walls, and even scrapping of oil wells, casualties, etc. nasty accident

Method used

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  • Underground explosion limit fast measuring device and method
  • Underground explosion limit fast measuring device and method
  • Underground explosion limit fast measuring device and method

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as figure 1 , figure 2 Shown, the present invention is a kind of downhole combustion and explosion limit fast measuring device, and its experimental mechanism is, in the air cavity (2) of test cylinder, fills a certain amount of air or the nitrogen of certain oxygen content, then according to the concentration requirement Inject a certain amount of certain hydrocarbon gas, use the igniter (10) with sufficient ignition energy to ignite continuously, and take the occurrence of obvious detonation pressure as the main criterion for ignition, and assist the sudden decrease of oxygen concentration and total hydrocarbon concentration, temperature The sudden increase of is an auxiliary criterion to judge whether an explosion occurs. Simultaneously, the gas component analyzer (24) is used to analyze the deflagration tail gas to determine the type of detonation an...

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Abstract

The invention relates to an underground explosion limit fast measuring device and method. The underground explosion limit fast measuring device is composed of a high-temperature and high-pressure explosion test cylinder and a system assembly. The high-temperature and high-pressure explosion test cylinder is composed of a gas chamber and a base. The gas chamber is a cylindrical closed space, can simulate the pressure and temperature conditions of the stratum or underground, has certain gas tightness, and can be fixed to anti-overturning guide rails by sliding a floating plate. The base can fixthe test cylinder to an experimental table with an oscillating device, and the gases in the gas chamber can be fully mixed by oscillating the test cylinder. Around the high-temperature and high-pressure explosion test cylinder, an automatic control gas supply part of air, nitrogen with variable oxygen content and hydrocarbon gases, an ignition and temperature control part, a test tail gas treatment and analysis part, relevant sensors and a servo control mechanism are added to form the system assembly of the test device. The device and the method can be used to accurately measure the explosionlimit of gases in the current stratum under field conditions through an explosion limit combined test process, so as to avoid the occurrence of underground explosion accidents.

Description

technical field [0001] The invention relates to a device and method for quickly measuring the limit of underground combustion and explosion, belonging to the technical field of underground combustion and explosion. Background technique [0002] Gas drilling has the advantages of protecting oil and gas reservoirs, high ROP, good leakage prevention and control effects, no water sensitivity caused by external drilling fluid, low cost, and short well construction period, etc., and has good application in oil and gas reservoir development value. However, due to the characteristics of downhole high temperature and high pressure and various factors in the drilling process, any oil and gas layers encountered during gas drilling may cause downhole explosions, resulting in damage to drilling tools, collapse of well walls, and even scrapping of oil wells, casualties, etc. vicious accident. The explosion limit will change with the constant change of formation pressure, temperature and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B49/08
CPCE21B49/00E21B49/08E21B49/0875
Inventor 李一博李永杰吴磊孟英峰陈一健
Owner SOUTHWEST PETROLEUM UNIV
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