CN210071193U - Carbon dioxide phase change fracturing pressure testing device - Google Patents
Carbon dioxide phase change fracturing pressure testing device Download PDFInfo
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- CN210071193U CN210071193U CN201920760839.3U CN201920760839U CN210071193U CN 210071193 U CN210071193 U CN 210071193U CN 201920760839 U CN201920760839 U CN 201920760839U CN 210071193 U CN210071193 U CN 210071193U
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Abstract
The utility model discloses a carbon dioxide phase transition fracturing pressure test device. The device of the utility model comprises a base; the sleeve is vertically arranged on the base, the top end of the sleeve is open, the inner wall of the sleeve is provided with a plurality of pressure sensors, and the lower end of the sleeve is provided with an air leakage hole; the carbon dioxide phase change cracking device is vertically arranged in the sleeve, a gap is formed between the carbon dioxide phase change cracking device and the inner wall of the sleeve, and a filler is filled in the gap; the energy discharge port of the carbon dioxide phase change cracking device is positioned below the air discharge hole; and the data acquisition and processing system is electrically connected with the pressure sensor. The utility model discloses can effective test carbon dioxide phase transition send and split the pressure of exploding of letting out under the perpendicular operating mode of device, can acquire the carbon dioxide phase transition of different positions and let out the pressure time curve of exploding and let out the pressure on-way distribution curve with the carbon dioxide phase transition at different moments, it is significant to the point type of studying carbon dioxide phase transition and send the technique of splitting to gather the effect.
Description
Technical Field
The utility model relates to a broken rock technical field especially relates to a carbon dioxide phase transition is sent and is split pressure test device.
Background
With the development of society, the requirements of urban excavation engineering on vibration and environment are higher and higher, common explosive blasting cannot be used under some conditions, and the carbon dioxide phase change cracking technology is widely applied as the primary substitute means of the existing explosive blasting. However, the practical level of the carbon dioxide phase transition cracking technology is far higher than the theoretical level, and the load research on the carbon dioxide phase transition cracking technology is still in the primary stage. The existing carbon dioxide phase change cracking technology research usually utilizes theoretical calculation to calculate carbon dioxide phase change cracking energy, and then converts the phase change cracking energy into TNT equivalent serving as phase change cracking load. However, the shock wave effect generated by the explosive load is far greater than the static wedge effect of explosive gas, so that the main effect of the shock wave is mainly the shock wave effect when the explosive breaks rock, the air wedge effect in the carbon dioxide phase change cracking rock breaking process plays a non-negligible role in rock crack expansion, the energy ratio of the synergistic effect of the stress wave and the gas in the carbon dioxide phase change cracking rock breaking process is not clear, and certain defects exist in the theoretical research of directly converting the carbon dioxide phase change cracking load into the explosive load. In contrast, the phase change load characteristic of the carbon dioxide can be more simply and accurately reflected by directly researching the pressure time-course curve of the carbon dioxide phase change cracking.
The existing carbon dioxide phase change pressure time course curve tests have various types. One method is to test the pressure in the carbon dioxide phase change cracking tube, namely, a chamber pressure test, wherein the pressure in the chamber pressure test is the pressure in the carbon dioxide phase change cracking tube, and the pressure is different from the pressure of high-pressure gas injected from an energy discharge port of a carbon dioxide phase change cracking device, so that the pressure of carbon dioxide phase change explosion discharge cannot be accurately reflected. One method is to adopt a sealed steel pipe inner sleeve single energy release hole carbon dioxide phase change cracking device, simulate a drill hole by using the steel pipe, and test the carbon dioxide phase change cracking pressure by the steel pipe lying horizontally, but the test method has partial defects.
As the carbon dioxide phase change fracturing is time-consuming and labor-consuming in field test and wastes manpower and material resources, the method for measuring the carbon dioxide phase change fracturing pressure time-course curve in a laboratory is an economic and rapid method. Because the precision of the carbon dioxide phase change cracking time course curve obtained by the existing test is not high, the carbon dioxide phase change cracking technology is a point-type energy-gathered blasting technology, and pressure time course curves at different positions in the same section have certain difference, a testing device and a testing method which can accurately obtain the carbon dioxide phase change cracking pressure time course curves at different positions in a drill hole under different cracking parameters are urgently needed, so that the carbon dioxide phase change cracking power can be accurately described, and a theoretical basis is provided for the actual field application.
Disclosure of Invention
An object of the utility model is to provide a can effective test carbon dioxide phase change send the carbon dioxide phase change of pressure of exploding of letting out under the perpendicular operating mode of device to lead and split pressure test device to the aforesaid of prior art not enough.
The utility model discloses a carbon dioxide phase transition fracturing pressure testing device, which comprises a base; the sleeve is vertically arranged on the base, the top end of the sleeve is open, a plurality of pressure sensors are arranged on the inner wall of the sleeve, and an air leakage hole is formed in the lower end of the sleeve; the carbon dioxide phase change cracking device is vertically arranged in the sleeve, a gap is formed between the carbon dioxide phase change cracking device and the inner wall of the sleeve, and a filler is filled in the gap; the energy discharge port of the carbon dioxide phase change cracking device is positioned below the air discharge hole; and the data acquisition and processing system is electrically connected with the pressure sensor.
Preferably, the air release hole is provided with a wire mesh for preventing the filler from leaking out therethrough.
Preferably, it is a plurality of pressure sensor 8 follows the axial and the circumference inner wall interval of sleeve 2 set up, follow the 8 equidistance intervals of pressure sensor that 2 axial of sleeve set up on same straight line, follow pressure sensor 8 that circumference inner wall interval set up is at same horizontal plane, and is provided with 4 at least at pressure sensor 8 at same horizontal plane.
Preferably, a plurality of pressure sensors 8 are arranged at intervals along the inner wall of the circumference on the horizontal plane where the energy leakage port 351 is located, and at least two pressure sensors 8 correspond to the energy leakage port 351.
Preferably, the carbon dioxide phase change cracking device comprises a filling head, a liquid storage pipe, a heating pipe, a constant pressure shear slice and an energy discharge head; the liquid storage pipe is vertically arranged in the sleeve, the filling head is arranged at the top end of the liquid storage pipe, the energy discharging head is detachably arranged at the bottom end of the liquid storage pipe, the constant-pressure shear slice can be arranged at the bottom end of the liquid storage pipe, and the heating pipe is arranged in the liquid storage pipe and used for heating liquid carbon dioxide in the liquid storage pipe; the energy discharge port is arranged on the energy discharge head.
Preferably, the carbon dioxide phase change cracking device is vertically arranged in the sleeve in a detachable mode through a fixing mechanism.
Preferably, the fixing mechanism comprises a plurality of bolts, a plurality of fixing threaded holes are formed in the side wall of the sleeve at intervals along the axial direction of the sleeve, the bolts correspond to the fixing threaded holes one to one, and one end of each bolt penetrates through the corresponding fixing threaded hole to abut against the outer pipe wall of the liquid storage pipe.
Preferably, the sleeve is detachably and vertically arranged on the base through a mounting mechanism.
Preferably, the installation mechanism comprises an installation screw rod fixedly arranged at the bottom end of the sleeve, an installation screw hole is formed in the base, and the installation screw rod is screwed in the installation screw hole.
Preferably, installation mechanism still includes two at least bracing pieces, the sleeve outer wall is equipped with two at least support recesses, support the recess with the bracing piece one-to-one, the one end of bracing piece articulates on the base, and the other end extends in the support recess.
The utility model discloses a carbon dioxide phase transition fracturing pressure test device excites the heating tube, makes it send a large amount of heat in the short time, and liquid carbon dioxide heat absorption looks becomes supercritical state, and when the pressure surpassed the rupture pressure of level pressure shear section in the liquid storage pipe inner chamber, carbon dioxide rushes out the phase transition and becomes high-pressure gas; the pressure sensor is impacted by high-pressure gas rushing out in a phase change manner, the pressure sensor transmits the acquired pressure value to the data acquisition and processing system all the time, the explosion venting pressure under the vertical working condition of the carbon dioxide phase change cracking device can be effectively tested, carbon dioxide phase change explosion venting pressure time course curves at different positions and carbon dioxide phase change explosion venting pressure along-course distribution curves at different moments can be obtained, and the pressure sensor has important significance for researching the point type energy gathering effect of the carbon dioxide phase change cracking technology.
Drawings
Fig. 1 is a schematic structural diagram of a carbon dioxide phase transition cracking pressure testing device of the present invention;
fig. 2 is a cross-sectional view of 1-1 of fig. 1.
1-a base; 11-mounting screw holes; 2-a sleeve; 21-air release holes; 211-wire netting; 22-fixing threaded holes; 23-supporting the groove; 3-a carbon dioxide phase transition cracking device; 31-a filling head; 32-a liquid storage tube; 33-a heating tube; 34-constant pressure shearing; 35-energy discharge head; 351-a vent; 4-a filler; 5-a data acquisition processing system; 6-a fixing mechanism; 61-bolt; 7-an installation mechanism; 71-installing a screw rod; 72-a support bar; 8-pressure sensor.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 2, the carbon dioxide phase transition cracking pressure testing device of the present invention comprises a base 1; the sleeve 2 is vertically arranged on the base 1, the top end of the sleeve 2 is open, a plurality of pressure sensors 8 are arranged on the inner wall of the sleeve 2, and the lower end of the sleeve 2 is provided with an air leakage hole 21; the carbon dioxide phase change cracking device 3 is vertically arranged in the sleeve 2, a gap is formed between the carbon dioxide phase change cracking device 3 and the inner side wall of the sleeve 2, and a filler 4 is filled in the gap; the energy discharge port 351 of the carbon dioxide phase change cracking device 3 is positioned below the air discharge hole 21; and the data acquisition and processing system 5 is electrically connected with the pressure sensor 8.
The utility model discloses a carbon dioxide phase transition fracturing pressure test device, arouse heating tube 33, make it send a large amount of heats in the short time, liquid carbon dioxide heat absorption phase becomes supercritical state, when the pressure surpassed the rupture pressure of level pressure shear slice 34 in liquid storage pipe 32 inner chamber, carbon dioxide rushes out the phase transition and becomes high-pressure gas; the high-pressure gas rushed out by phase change impacts the pressure sensor 8, and the pressure sensor 8 transmits the acquired pressure value to the data acquisition and processing system 5 at any moment. The explosion venting pressure of the carbon dioxide phase change cracking device 3 under the vertical working condition can be effectively tested, carbon dioxide phase change explosion venting pressure time-course curves at different positions and carbon dioxide phase change explosion venting pressure along-course distribution curves at different moments can be obtained, and the method has important significance for researching the point type energy gathering effect of the carbon dioxide phase change cracking technology.
A certain gap is kept between the carbon dioxide phase change cracking device 3 and the sleeve 2, so as to simulate the uncoupled state between the carbon dioxide phase change cracking device 3 and the drill hole.
The air release holes 21 may be provided with wire 211 to prevent the filler 4 from leaking therethrough. The filler 4 is not blown out from the air escape hole 21 while ensuring smooth air flow. Wherein the filler 4 can be clay stemming or the like. The air release hole 21 is used for simulating the pressure reduction process when the gas is wedged into the rock body when the carbon dioxide is subjected to phase change cracking, and can effectively represent the pressure dissipation process of the high-pressure gas generated by the carbon dioxide in the rock breaking process.
A plurality of pressure sensor 8 set up along sleeve 2's axial and circumference inner wall interval, and 8 equidistance intervals of pressure sensor that set up along sleeve 2 axial set up on same straight line, and the pressure sensor 8 that sets up along circumference inner wall interval is at same horizontal plane, and is provided with 4 at least at the pressure sensor 8 of same horizontal plane. A plurality of pressure sensors 8 are arranged on the horizontal plane, and the data collected by the pressure sensors 8 at different positions of the horizontal plane can effectively compare the pressure difference of different positions of the same section in the point-type energy-gathering blasting process.
Wherein the pressure sensor 8 may be a PVDF pressure sensor or a high range piezoresistive sensor.
The horizontal plane of the energy leakage port 351 is also provided with a plurality of pressure sensors 8 which are arranged at intervals along the inner wall of the circumference of the sleeve, and at least two pressure sensors 8 correspond to the energy leakage port 351. The high-pressure carbon dioxide phase change cracking gas can directly impact the two pressure sensors 8, and pressure data can be accurately obtained;
the carbon dioxide phase change cracking device 3 comprises a filling head 31, a liquid storage pipe 32, a heating pipe 33, a constant pressure shearing sheet 34 and an energy discharge head 35; the liquid storage pipe 32 is vertically arranged in the sleeve 2, the filling head 31 is arranged at the top end of the liquid storage pipe 32, the energy releasing head 35 is detachably arranged at the bottom end of the liquid storage pipe 32, the constant-pressure shearing sheet 34 can be arranged at the bottom end of the liquid storage pipe 32, and the heating pipe 33 is arranged in the liquid storage pipe 32 and used for heating liquid carbon dioxide in the liquid storage pipe 32; the dump port 351 is provided on the dump head 35. The two energy leakage ports 351 can be arranged on two sides of the energy leakage head 35, and the two pressure sensors 8 correspond to the energy leakage ports 351 on two sides respectively.
The carbon dioxide phase change cracking device 3 can be vertically arranged in the sleeve 2 in a detachable mode through the fixing mechanism 6.
The fixing mechanism 6 has various structures, which are not limited herein, in this embodiment, the fixing mechanism 6 may include a plurality of bolts 61, the sidewall of the sleeve 2 is provided with a plurality of fixing threaded holes 22 at intervals along the axial direction thereof, the bolts 61 correspond to the fixing threaded holes 22 one by one, and one end of the bolt 61 penetrates through the fixing threaded hole 22 and abuts against the outer wall of the liquid storage tube 32. For further fixing stability, a groove may be provided on the outer wall of the liquid storage tube, without penetrating the outer wall of the liquid storage tube, and one end of the bolt 61 is inserted into the groove through the fixing threaded hole 22. The arrangement position of the plurality of bolts 61 may be various, and is not limited herein, for example: the position for the bolt 61 can be on four straight lines along its axis, each on either end of two perpendicular diametral planes.
The sleeve 2 can be detachably arranged vertically on the base 1 by means of a mounting mechanism 7.
The structure of the mounting mechanism 7 is various, and is not limited herein, in this embodiment, the mounting mechanism 7 may include a mounting screw 71 fixedly disposed at the bottom end of the sleeve 2, the base 1 is provided with a mounting screw hole 11, and the mounting screw 71 is screwed into the mounting screw hole 11.
The mounting mechanism 7 may further include at least two support rods 72, the outer wall of the sleeve 2 is provided with at least two support grooves 23, the support grooves 23 correspond to the support rods 72 one to one, one end of each support rod 72 is hinged to the base 1, and the other end of each support rod extends into the support groove 23. Guarantee that carbon dioxide phase transition fracturing device 3 and uncovered thick wall steel sleeve 2 can be perpendicular to base 1 when experimental test, effectively simulate the carbon dioxide phase transition fracturing device 3 and set up the condition in the drilling perpendicularly, carbon dioxide phase transition fracturing device 3 keeps perpendicular stable state when guaranteeing the experiment.
The above is not relevant and is applicable to the prior art.
Although certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention, which is to be construed as broadly as the present invention will suggest themselves to those skilled in the art to which the invention pertains and which is susceptible to various modifications or additions and similar arrangements to the specific embodiments described herein without departing from the scope of the invention as defined in the appended claims. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a carbon dioxide phase transition fracturing pressure test device which characterized in that: comprises that
A base (1);
the sleeve (2) is vertically arranged on the base (1), the top end of the sleeve (2) is open, a plurality of pressure sensors (8) are arranged on the inner wall of the sleeve (2), and the side wall of the lower end of the sleeve (2) is provided with an air release hole (21);
the carbon dioxide phase change cracking device (3) is vertically arranged in the sleeve (2), a gap is formed between the carbon dioxide phase change cracking device (3) and the inner side wall of the sleeve (2), and a filler (4) is filled in the gap; the energy discharge port (351) of the carbon dioxide phase change cracking device (3) is positioned below the air discharge hole (21);
the data acquisition and processing system (5), the data acquisition and processing system (5) is electrically connected with the pressure sensor (8).
2. The carbon dioxide phase transition fracturing pressure testing device of claim 1, wherein: the air leakage hole (21) is provided with a wire mesh (211) for preventing the filler (4) from leaking out of the air leakage hole.
3. The carbon dioxide phase transition fracturing pressure testing device of claim 1, wherein: a plurality of pressure sensor (8) are followed the axial and the circumference inner wall interval of sleeve (2) set up, follow pressure sensor (8) equidistance interval that sleeve (2) axial set up sets up on same straight line, follows pressure sensor (8) that circumference inner wall interval set up are at same horizontal plane, and are provided with 4 at least in pressure sensor (8) of same horizontal plane.
4. The carbon dioxide phase transition fracturing pressure testing device of claim 3, wherein: the horizontal plane where the energy leakage port (351) is located is also provided with a plurality of pressure sensors (8) which are arranged along the inner wall of the circumference at intervals, and at least two pressure sensors (8) correspond to the energy leakage port (351).
5. The carbon dioxide phase transition fracturing pressure testing device of claim 1, wherein: the carbon dioxide phase change cracking device (3) comprises a filling head (31), a liquid storage pipe (32), a heating pipe (33), a constant pressure shearing sheet (34) and an energy release head (35); the liquid storage pipe (32) is vertically arranged in the sleeve (2), the filling head (31) is arranged at the top end of the liquid storage pipe (32), the energy release head (35) is detachably arranged at the bottom end of the liquid storage pipe (32), the constant-pressure shear slice (34) can be arranged at the bottom end of the liquid storage pipe (32), and the heating pipe (33) is arranged in the liquid storage pipe (32) and used for heating liquid carbon dioxide in the liquid storage pipe (32); the energy leakage port (351) is arranged on the energy leakage head (35).
6. The carbon dioxide phase transition fracturing pressure testing device of claim 5, wherein: the carbon dioxide phase change cracking device (3) is vertically arranged in the sleeve (2) through a fixing mechanism (6) in a detachable mode.
7. The carbon dioxide phase transition fracturing pressure testing device of claim 6, wherein: fixing mechanism (6) include a plurality of bolts (61), the lateral wall of sleeve (2) is equipped with a plurality of fixed screw hole (22) along its axial interval, bolt (61) with fixed screw hole (22) one-to-one, the one end of bolt (61) is passed fixed screw hole (22) with the outer wall of stock solution pipe (32) offsets.
8. The carbon dioxide phase transition cracking pressure testing apparatus of any one of claims 1-7, wherein: the sleeve (2) is detachably and vertically arranged on the base (1) through an installation mechanism (7).
9. The carbon dioxide phase transition fracturing pressure testing device of claim 8, wherein: installation mechanism (7) is including fixed setting up installation screw rod (71) in sleeve (2) bottom, be equipped with installation screw (11) on base (1), installation screw rod (71) spiral is in installation screw (11).
10. The carbon dioxide phase transition fracturing pressure testing device of claim 9, wherein: installation mechanism (7) still includes two at least bracing pieces (72), sleeve (2) outer wall is equipped with two at least support recess (23), support recess (23) with bracing piece (72) one-to-one, the one end of bracing piece (72) articulates on base (1), the other end extends in supporting recess (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920760839.3U CN210071193U (en) | 2019-05-24 | 2019-05-24 | Carbon dioxide phase change fracturing pressure testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920760839.3U CN210071193U (en) | 2019-05-24 | 2019-05-24 | Carbon dioxide phase change fracturing pressure testing device |
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| CN210071193U true CN210071193U (en) | 2020-02-14 |
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| CN201920760839.3U Expired - Fee Related CN210071193U (en) | 2019-05-24 | 2019-05-24 | Carbon dioxide phase change fracturing pressure testing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261019A (en) * | 2019-05-24 | 2019-09-20 | 中国地质大学（武汉） | A kind of carbon dioxide phase transformation fracturing pressure test device |
| CN111537432A (en) * | 2020-04-29 | 2020-08-14 | 重庆大学 | Liquid CO2Phase change cracking power testing device and testing method |
| CN112268488A (en) * | 2020-10-16 | 2021-01-26 | 江苏中控能源科技有限公司 | Dry ice fracturing device temperature and pressure control system and control method |
| CN117191632A (en) * | 2023-11-02 | 2023-12-08 | 中国石油天然气集团有限公司 | Carbon dioxide phase change experiment system and experiment method |
-
2019
- 2019-05-24 CN CN201920760839.3U patent/CN210071193U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261019A (en) * | 2019-05-24 | 2019-09-20 | 中国地质大学（武汉） | A kind of carbon dioxide phase transformation fracturing pressure test device |
| CN110261019B (en) * | 2019-05-24 | 2024-04-02 | 中国地质大学（武汉） | Carbon dioxide phase transition fracturing pressure testing device |
| CN111537432A (en) * | 2020-04-29 | 2020-08-14 | 重庆大学 | Liquid CO2Phase change cracking power testing device and testing method |
| CN111537432B (en) * | 2020-04-29 | 2021-06-04 | 重庆大学 | Liquid CO2Phase change cracking power testing device and testing method |
| CN112268488A (en) * | 2020-10-16 | 2021-01-26 | 江苏中控能源科技有限公司 | Dry ice fracturing device temperature and pressure control system and control method |
| CN117191632A (en) * | 2023-11-02 | 2023-12-08 | 中国石油天然气集团有限公司 | Carbon dioxide phase change experiment system and experiment method |
| CN117191632B (en) * | 2023-11-02 | 2024-03-08 | 中国石油天然气集团有限公司 | Carbon dioxide phase change experiment system and experiment method |
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Granted publication date: 20200214 Termination date: 20200524 |
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