CN104865370B - Seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing - Google Patents

Seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing Download PDF

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Publication number
CN104865370B
CN104865370B CN201510195859.7A CN201510195859A CN104865370B CN 104865370 B CN104865370 B CN 104865370B CN 201510195859 A CN201510195859 A CN 201510195859A CN 104865370 B CN104865370 B CN 104865370B
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China
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cylinder
seepage flow
ultrasonic
paper clip
clip holder
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CN201510195859.7A
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Chinese (zh)
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CN104865370A (en
Inventor
秦勇
师庆民
杨兆彪
申建
兰凤娟
陈义林
吴财芳
屈争辉
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中国矿业大学
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Abstract

The invention discloses seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing, relate to rock core clamping technique field. The present invention includes middle clamp assemblies, plug, cylinder body, spiral channel, ultrasonic transducer and heat-insulation layer. Middle clamp assemblies is positioned at cylinder interior, can clamp rock core and provide condition of triaxial stress; Replace middle clamp assemblies with plug to use as adsorption-desorption tank; Spiral channel is had for constant temperature fluid circulation, it is provided that isoperibol in cylinder body; Ultrasonic transducer is bonded in outer wall of cylinder block and provides ultrasound field; Heat-insulation layer provides better constant temperature effect. The embodiment of the present invention can realize the experiment condition of triaxial stress and constant temperature under ultrasonic pressing, the problem of dtmf distortion DTMF that ultrasonic reflections causes can be reduced, ultrasonic heat effect and mechanical vibration effect can being easily separated, single factors analyzes the ultrasound wave impact on seepage flow, desorbing.

Description

Seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing

Technical field

The present invention relates to rock core clamping technique field, specifically seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing.

Background technology

In cbm development field, ultrasonic technology has feature simple to operate, pollution-free, that cost is low, thus has specific advantage at environment and reservoir damage angle. Incompatible and cause that, under the low objective background of well yield, the application of ultrasonic technology obtains new attention and exploration in, tradition development technique and the hypotonic feature of China's coal seam reservoirs. Coal seam reservoirs is had the effect of anatonosis, short desorbing by ultrasound wave.

The application in cbm development of the current ultrasound wave is also in the desk research stage, but existing experiment porch promotes coal-bed methane seepage for research ultrasound wave, the mechanism of action of desorbing there is also very big deficiency. One is that core holding unit is placed in water bath, acts on coal body by belonging to propagation ultrasonic delivery core holding unit, and ultrasound wave is dredged medium from ripple and entered Bomi dieletric reflection phenomenon especially substantially, causes the ultrasound wave serious distortion acting on coal body; One is that ultrasonic transducer is placed in core holding unit one end, then it cannot be guaranteed that isoperibol, ultra sonic machinery vibration effect and heat effect are effectively separated research.

Therefore, prior art exists that ultrasound wave distortion is serious, ultra sonic machinery vibration effect can not efficiently separate two major defects with heat effect. The problem that the apparatus reduces ultrasound wave distortion, it is possible to two kinds of action modes of ultrasound wave are effectively separated, can also carry out Seepage Experiment and adsorption and desorption experiment simultaneously, be greatly saved experimental cost.

Summary of the invention

It is an object of the invention to provide seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing, complete the Seepage Experiment under ultrasonic pressing and adsorption and desorption experiment, efficiently separate ultra sonic machinery vibration effect and two kinds of action modes of heat effect, reduce simultaneously and be applied to the problem that the ultrasound wave of sample exists distortion.

The present invention realizes with following technical scheme: seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing, and including the cylinder body of both ends open, the two ends of cylinder body are movably installed with end cap; One end of cylinder body is provided with seepage flow fixation kit or desorbing fixation kit I through end cap; One end of cylinder body is provided with seepage flow moving component or desorbing fixation kit II through end cap; The outer surface symmetry of cylinder body is pasted with ultrasonic transducer;

Described seepage flow fixation kit is non-movable piston, and described seepage flow moving component is the movable plunger slided along cylinder body, and the other end end cap of cylinder body is fixed with axial compression pressure chamber, and movable plunger is arranged in cylinder body through axial compression pressure chamber; Non-movable piston and movable plunger and between be provided with rock core, between rock core and movable plunger, be provided with pad; Rock core is wrapped up by packing element, forms ring packing space between packing element and cylinder body, for annular confined pressure chamber; Non-movable piston is provided with gas flow channel and passage I; Movable plunger is provided with passage II and temperature sensor passage; Axial compression pressure chamber is provided with passage III; Cavity is divided into two chambers in left and right by movable plunger inside axial compression pressure chamber, and passage III connects with its lateral compartments;

Described desorbing fixation kit I is plug I, and described desorbing fixation kit II is plug II;Plug I is provided with gas passage, and plug II is provided with temperature sensor passage.

It is further: the end face that described non-movable piston is relative with movable plunger, and the two of pad end faces are all in ring network structure.

Cylinder body arranges a heat-insulation layer, heat-insulation layer leaves ultrasonic transducer line outlet.

Adopt between described end cap and cylinder body and threaded.

The outer surface of cylinder body is provided with spiral channel; That one end cylinder body of movable plunger is provided with an inflow entrance, that one end cylinder body of fixed piston is provided with a flow export.

Cylinder body and ultrasonic transducer bonded part are circular platform.

Movable plunger is provided with active catch wing, and active catch wing is fixed by corresponding end cap; Active catch wing is sealed by O RunddichtringO at the radial direction position contacted with cylinder body.

Described non-movable piston is sealed by O RunddichtringO at the radial direction position contacted with cylinder body.

The invention has the beneficial effects as follows: complete the Seepage Experiment under ultrasonic pressing and adsorption and desorption experiment, efficiently separate ultra sonic machinery vibration effect and two kinds of action modes of heat effect; In ultrasonic pressing process, sound wave can enter cylinder body by 90 ° of angle of incidence, decreases the ultrasound wave caused due to reflection and significantly decays, the problem reducing ultrasound wave distortion.

Accompanying drawing explanation

Fig. 1 is present configuration schematic diagram;

Fig. 2 is plug I structural representation;

Fig. 3 is plug II structural representation;

Fig. 4 is this cylinder body and ultrasonic transducer bonded part structural representation.

In figure: 1, cylinder body, 2, spiral channel, 3, left end cap, 4, non-movable piston, 5, movable plunger, 6, axial compression pressure chamber, 7, right end cap, 8, active catch wing, 9, pad, 10, packing element, 11, rock core, 12, annular confined pressure chamber, 13, gas flow channel, 14, passage I, 15, passage II, 16, passage III, 17, inflow entrance, 18, flow export, 19, annular groove, 20, temperature sensor, 21, ultrasonic transducer, 22, heat-insulation layer, 23, ultrasonic transducer line outlet, 24, plug I, 25, plug II, 26, gas passage, 27, temperature sensor passage.

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the present invention is described in more detail. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, does not limit the present invention.

As it is shown in figure 1, Seepage Experiment Two-purpose paper clip holder population structure schematic diagram under a kind of ultrasonic pressing, in the middle of wherein, clamp assemblies includes non-movable piston 4, movable plunger 5, axial compression pressure chamber 6, active catch wing 8, pad 9, packing element 10, rock core 11. Ensure that gas fully contacts with rock core 11 and circulates. Movable plunger 5 is placed on the right side of cylinder body 1, can provide axial compressive force with axial compression pressure chamber 6 combination, right end cap 7 fix; Active catch wing 8 primarily serves sealing function; Pad 9 mainly makes up the defect that sample length is inadequate; Rock core 11 is clamped by non-movable piston 4, movable plunger 5, packing element 10 wrap up, and and between cylinder body, form annular pressure chamber, it is provided that hoop confined pressure. Non-movable piston 4 right side, movable plunger 5 left side, 9 two end faces of pad are all in ring network structure, it is ensured that gas fully contacts with rock core 11 and circulates.

Non-movable piston 4, active catch wing 8 seal by O RunddichtringO at the radial direction position contacted with cylinder body 1, and non-movable piston 4 is fixed by left end cap 3, and left end cap 3 and cylinder body 1 are threaded connection; Active catch wing 8 is fixed by right end cap 7, right end cap 7 with cylinder body 1 again by threadeding, it is ensured that the safety of experiment. Left end cap 3 and right end cap 7 are all detachable, are all stripped out by centre clamp assemblies.

Movable plunger 5 and axial compression pressure chamber 6 are combined as axial compression compression system, and axial compression pressure chamber 6 is fixed in right end cap by keeping off wing. Movable plunger 5 is each passed through axial compression pressure chamber 6, right end cap 7 and active catch wing 8, cavity is divided into two chambers in left and right by the gear wing on movable plunger 5, pressurized fluid enters right chamber by passage III 16 and promotes movable plunger 5 to be moved to the left, thus rock core 11 is produced axial compression.

Between packing element 10 and cylinder body 1 formed ring packing space, for annular confined pressure chamber 12, by the passage I 14 non-movable piston 4 within to annular confined pressure chamber injection pressurized fluid, thus extruding packing element pressure transmission is produced confined pressure to rock core. Movable plunger 5, axial compression pressure chamber 6, packing element 10, confined pressure pressure chamber 12 collectively form the fluid passage of experimental gas flow channel and confined pressure booster cavity. Active catch wing 8 has Seepage Experiment gas flow pass and annular groove 19, and annular groove is provided with O RunddichtringO. Axial compression pressure chamber 6 has the passage III that pressurized fluid flows into, fitted shaft pressure pressure chamber and movable plunger, it may be achieved the experiment condition of triaxial stress field.

Concrete operations are: clamping rock core, first pass through passage I 14 and input pressurized fluid to annular confined pressure pressure chamber 12, given confined pressure force value, it is ensured that core sample does not damage; Then pass through passage III 16 in axial compression pressure chamber 6, inject pressurized fluid, change pressure limit step by step.

Non-movable piston 4 is provided with gas flow channel 13, and movable plunger 5 is provided with gas flow pass II 15, and gas flow channel 13 is connected with gas collecting bottle, it is provided that stable gas pressure; Passage II 15 is connected with gas flowmeter, detects percolation flow velocity. Being additionally provided with temperature sensor 20 in movable plunger 5 and dispose passage, temperature sensor 20 is connected with data acquisition module. Wherein, temperature sensor 20 probe is put near rock core 11 right side, ultrasound wave can be loaded under non-constant temperature, temperature changing regularity near monitoring rock core, then closing on the basis of ultrasonic pressing, described temperature changing regularity is regulated, the impact on seepage flow of the analog ultrasonic wave single heat effect by constant-temperature circulating device.

Rock core clamp assemblies is mainly rock core 11 Seepage Experiment and provides condition of triaxial stress, is taken out by all parts, replaces with plug I 24 and plug II 25, can use as coal adsorption-desorption tank, saved cost, plug I 24 structure as in figure 2 it is shown, plug II 25 structure as shown in Figure 3. Plug I 24 is fixed by left end cap 3 equally, and plug II 25 is fixed by right end cap 7. Plug I 24 is provided with gas passage 26, is connected with compensating cylinder; Plug II 25 is provided with temperature sensor and arranges passage 27, connects temperature sensor. Temperature sensor can monitor temperature changing regularity in ultrasonic pressing process under non-constant temperature, and then closing, the basis of ultrasound field utilizes the impact on methane desorbing gas of the isoperibol analog ultrasonic wave temperature effects, thus ultrasonic heat effect is separated.

The surface of cylinder body 1 is provided with spiral channel 2, circulation canal is provided for constant temperature fluid, spiral channel 2 is provided with inflow entrance 17 and flow export 18 respectively at two ends, left and right, can be connected with constant temperature circulating system respectively, by closing calorstat and circulating pump constantly to the internal raw material providing constant temperature circulating of spiral channel and power, constant temperature fluid constantly flows into and out, it is ensured that cylinder body 1 is internal keeps isoperibol, in order to simulate described heat effect condition seepage flow, adsorption-desorption rule. Isoperibol not only simulates prime stratum temperature, it is also possible to offset the heat effect in ultrasonic pressing process in time, thus only inquiring into the ultrasound wave impact on gas flow, coal bed gas desorbing from mechanical vibration angle, it is achieved mechanical vibration separate with heat effect. For being further ensured that isoperibol, arrange heat-insulation layer 21 at outermost layer, to reduce heat loss, play better constant temperature effect. Heat-insulation layer 21 leaves ultrasonic transducer line outlet 23, is connected with outside supersonic generator for it.

In addition, in ultrasonic pressing process, constantly the heat that ultrasound wave produces is taken away in time by constant temperature circulating system, cylinder body 1 internal temperature constant can be kept, thus offsetting the impact of ultrasonic heat effect, ensure that observed seepage flow, adsorption-desorption rule are the impact of ultra sonic machinery effect of vibration, thus realizing ultra sonic machinery vibration effect to separate the purpose of observation with heat effect.

As shown in Figure 1 and Figure 4, cylinder body 1 outer wall bonding is close to by ultrasonic transducer 21, is circular platform at cylinder body and ultrasonic transducer bonded part, for ultrasonic transducer 21 tight bond. In ultrasonic pressing process, sound wave can enter cylinder body 1 by 90 ° of angle of incidence, decreases the ultrasound wave caused due to reflection and significantly decays, the problem reducing ultrasound wave distortion.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made on the basis of the present invention, should be included within protection scope of the present invention.

Claims (8)

1. seepage flow, desorption experiment Two-purpose paper clip holder under a ultrasonic pressing, it is characterised in that: including the cylinder body (1) of both ends open, the two ends of cylinder body (1) are movably installed with end cap; One end of cylinder body (1) is provided with seepage flow fixation kit or desorbing fixation kit I through end cap; The other end of cylinder body (1) is provided with seepage flow moving component or desorbing fixation kit II through end cap; The outer surface symmetry of cylinder body (1) is pasted with ultrasonic transducer (21);
Described seepage flow fixation kit is non-movable piston (4), described seepage flow moving component is the movable plunger (5) slided along cylinder body, the other end end cap of cylinder body is fixed with axial compression pressure chamber (6), and movable plunger (5) is arranged in cylinder body through axial compression pressure chamber (6);It is provided with rock core (11) between non-movable piston (4) and movable plunger (5), between rock core (11) and movable plunger (5), is provided with pad (9); Rock core (11) is wrapped up by packing element (10), forms ring packing space between packing element (10) and cylinder body (1), for annular confined pressure chamber (12); Non-movable piston (4) is provided with gas flow channel (13) and passage I (14); Movable plunger (5) is provided with passage II (15) and temperature sensor passage; Axial compression pressure chamber (6) is provided with passage III (16); Cavity is divided into two chambers in left and right by movable plunger (5) in axial compression pressure chamber (6) inside, and passage III (16) connects with its lateral compartments;
Described desorbing fixation kit I is plug I (24), and described desorbing fixation kit II is plug II (25);Plug I is provided with gas passage (26), and plug II is provided with temperature sensor passage (27).
2. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterized in that: the end face that described non-movable piston (4) is relative with movable plunger (5), and two end faces of pad (9) are all in ring network structure.
3. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterized in that: cylinder body (1) arranges a heat-insulation layer (22), heat-insulation layer (22) leaves ultrasonic transducer line outlet (23).
4. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterised in that: adopt between described end cap and cylinder body and threaded.
5. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterised in that: the outer surface of cylinder body (1) is provided with spiral channel (2); That one end cylinder body of movable plunger (5) is provided with an inflow entrance (17), that one end cylinder body of fixed piston is provided with a flow export (18).
6. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterised in that: cylinder body and ultrasonic transducer bonded part are circular platform.
7. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterized in that: movable plunger (5) is provided with active catch wing (8), and active catch wing (8) is fixed by corresponding end cap; Active catch wing (8) is sealed by O RunddichtringO at the radial direction position contacted with cylinder body (1).
8. seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing according to claim 1, it is characterised in that: described non-movable piston (4) is sealed by O RunddichtringO at the radial direction position contacted with cylinder body (1).
CN201510195859.7A 2015-04-22 2015-04-22 Seepage flow, desorption experiment Two-purpose paper clip holder under a kind of ultrasonic pressing CN104865370B (en)

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US9879989B2 (en) * 2015-12-09 2018-01-30 General Electric Company Methods and systems for inspecting a wind turbine blade
CN105510143B (en) * 2016-01-16 2018-01-30 黑龙江科技大学 For the experimental provision of coal body in-situ mechanical characteristic and the Gas Hydrate saturation degree monitoring device based on the device and method
CN108535447A (en) * 2017-03-01 2018-09-14 中国石油天然气股份有限公司 Core parameters measuring device
CN107559001A (en) * 2017-09-13 2018-01-09 中国石油化工股份有限公司 A kind of artificial ground formation damage evaluating system
CN108387499B (en) * 2018-02-08 2020-05-22 成都理工大学 Rock underground in-situ multi-parameter anisotropy measuring device
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CN110530773B (en) * 2019-09-02 2020-06-09 重庆大学 Gas seepage and jet flow test device
CN110530772A (en) * 2019-09-02 2019-12-03 重庆大学 Coal sample large compressive strain and carbon dioxide displacement coal bed methane one experimental rig
CN110529107A (en) * 2019-09-02 2019-12-03 重庆大学 Coal seam strain, seepage flow, displacement and jet stream integrated experiment device and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380930A (en) * 1981-05-01 1983-04-26 Mobil Oil Corporation System for transmitting ultrasonic energy through core samples
CN201352212Y (en) * 2009-02-11 2009-11-25 中国石油天然气股份有限公司 Rock core wave speed anisotropy test board
CN102031955A (en) * 2010-09-27 2011-04-27 中国石油大学(华东) Ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and experimental method
CN102053253A (en) * 2009-10-30 2011-05-11 中国石油化工股份有限公司 Rock sample detection and data acquisition system and method and application thereof
CN103257081A (en) * 2013-04-28 2013-08-21 北京大学 Method and device for recovering oil and gas reservoir rock mechanics underground in-situ model

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380930A (en) * 1981-05-01 1983-04-26 Mobil Oil Corporation System for transmitting ultrasonic energy through core samples
CN201352212Y (en) * 2009-02-11 2009-11-25 中国石油天然气股份有限公司 Rock core wave speed anisotropy test board
CN102053253A (en) * 2009-10-30 2011-05-11 中国石油化工股份有限公司 Rock sample detection and data acquisition system and method and application thereof
CN102031955A (en) * 2010-09-27 2011-04-27 中国石油大学(华东) Ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and experimental method
CN103257081A (en) * 2013-04-28 2013-08-21 北京大学 Method and device for recovering oil and gas reservoir rock mechanics underground in-situ model

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
赵丽娟 等.超声波作用对改善煤储层渗透性的实验分析.《天然气地球科学》.2014,第25卷(第5期), *
超声波对油层作用效应的实验研究;王瑞飞 等;《石油实验地质》;20060430(第02期);第191-195页 *
高聚能重复强脉冲波煤储层增渗新技术试验与探索;秦勇 等;《煤炭科学技术》;20140630;第42卷(第6期);第1-7页、第70页 *

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