CN113790052B - Porous symmetrical energy-releasing joint cutting carbon dioxide fracturing device along axial direction of drill hole - Google Patents
Porous symmetrical energy-releasing joint cutting carbon dioxide fracturing device along axial direction of drill hole Download PDFInfo
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- CN113790052B CN113790052B CN202111053303.6A CN202111053303A CN113790052B CN 113790052 B CN113790052 B CN 113790052B CN 202111053303 A CN202111053303 A CN 202111053303A CN 113790052 B CN113790052 B CN 113790052B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 69
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 69
- 238000005520 cutting process Methods 0.000 title claims description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 17
- 238000005336 cracking Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000010008 shearing Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000001427 coherent effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005422 blasting Methods 0.000 abstract description 28
- 239000011435 rock Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000003245 coal Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- YRNNKGFMTBWUGL-UHFFFAOYSA-L copper(ii) perchlorate Chemical compound [Cu+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O YRNNKGFMTBWUGL-UHFFFAOYSA-L 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/14—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by compressed air; by gas blast; by gasifying liquids
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The embodiment of the invention provides a porous symmetrical energy-releasing lancing carbon dioxide fracturing device along the axial direction of a drill hole, and relates to the technical field of carbon dioxide blasting. The method comprises the following steps: the filling head is connected with the first end of the main pipe, a filling channel for filling carbon dioxide into the main pipe is arranged on the filling head, and a needle valve for opening and closing the filling channel is arranged in the filling channel; the filling head is axially parallel to the filling channel and is also provided with an installation through hole, the first end of the heating rod is arranged in the installation through hole, the second end of the heating rod is arranged in the main pipe, a cavity is arranged between the heating rod and the inner wall of the main pipe, liquid carbon dioxide is filled in the cavity, and the first end of the heating rod is also provided with a binding post; be equipped with a set of energy drainage hole on the lateral wall of being responsible for at least, every group energy drainage hole includes a plurality of energy drainage holes of being responsible for the axial interval setting, and a plurality of energy drainage hole axial collineation settings. The directional fracture controlled blasting of rock mass is convenient to realize, thereby improving the blasting effect.
Description
Technical Field
The invention relates to the technical field of carbon dioxide blasting, in particular to a carbon dioxide fracturing device with a plurality of symmetrical energy release hole cutting seams formed on the tube wall of the fracturing device.
Background
The carbon dioxide cracking device is a novel blasting device and widely applied to industries such as mines, buildings, engineering and the like, and the working principle of the carbon dioxide cracking device is that liquid carbon dioxide is filled in a liquid storage pipe of the carbon dioxide cracking device, a heating device is started to generate heat, so that the liquid carbon dioxide in the liquid storage pipe (main pipe) is instantly gasified, the volume is expanded by about 600 times, the pressure is rapidly increased, when the pressure in the pipe reaches the ultimate strength of a constant pressure shear slice, a high-pressure carbon dioxide gas-liquid mixture (fluid) breaks through the constant pressure shear slice, and the material is broken along a natural crack or an explosion crack by using the instantly generated strong thrust, so that the purpose of cracking (blasting) is achieved.
Traditional carbon dioxide sends and splits ware sets up a constant pressure shear slice and energy release head at the tip that sends and splits the ware, the high-pressure carbon dioxide gas of high energy breaks constant pressure shear slice and releases from the energy release head, the energy release is overhead generally to set up 3 ~ 4 equiangular circular release holes (energy release hole), and be mutually perpendicular between the normal direction of constant pressure shear slice and the axial in energy release hole, the high-pressure carbon dioxide gas-liquid mixture (fluid) of high energy need pass through a right angle and turn to at the release in-process, cause energy loss, jet pressure decay rate is fast. Meanwhile, the high-energy and high-pressure carbon dioxide gas-liquid mixture is released from the end part, the pressure is concentrated at one end to be released, the pressure in the drill hole is released unevenly, the coal rock body close to the release hole is broken after blasting, the coal rock body far away from the release hole is large in size, and the blasting effect is not ideal to a certain extent.
The energy release holes of the traditional carbon dioxide fracturing device are arranged at the end part in an equiangular mode, so that when the fracturing device is installed, the energy release holes cannot be installed in a directional mode, the energy release direction is disordered, modern engineering blasting develops towards the direction of fine blasting operation, and more requirements are placed on directional fracture control blasting.
Disclosure of Invention
In view of this, the embodiment of the invention provides a porous symmetric energy-leakage joint-cutting carbon dioxide fracturing device along the axial direction of a drill hole, which is convenient for realizing directional fracture controlled blasting of a rock body, thereby improving the blasting effect.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
a porous symmetrical energy-releasing lancing carbon dioxide fracturing device along the axial direction of a drill hole comprises: the filling head is connected to the first end of the main pipe, a filling channel for filling carbon dioxide into the main pipe is arranged on the filling head, and a needle valve for opening and closing the filling channel is arranged in the filling channel;
the filling head is axially parallel to the filling channel and is also provided with an installation through hole, the first end of the heating rod is arranged in the installation through hole, the second end of the heating rod is arranged in the main pipe, a cavity is arranged between the heating rod and the inner wall of the main pipe, liquid carbon dioxide is filled in the cavity, and the first end of the heating rod is also provided with a binding post;
be equipped with a set of energy release hole on the lateral wall of being responsible for at least, every group energy release hole includes a plurality of energy release holes of being responsible for the axial interval setting of a plurality of edges, and a plurality of energy release hole axial collineations set up.
Optionally, two sets of the energy release holes are arranged on the side wall of the main pipe, and the two sets of the energy release holes are symmetrically arranged about the axial section of the main pipe.
Optionally, a constant pressure shear slice is arranged in the energy release hole.
Optionally, the energy release hole is a stepped hole and at least comprises a first stepped hole and a second stepped hole connected with the first stepped hole, a first end of the first stepped hole is located at or close to the outer wall of the main pipe, a second end of the first stepped hole pipe is connected with a first end of the second stepped hole, and a second end of the second stepped hole is located at the inner wall of the main pipe;
the diameter of the first stepped hole is larger than that of the second stepped hole, and the constant pressure shearing sheet is arranged at the second end of the first stepped hole and fixed on the end face of the first end of the second stepped hole.
Optionally, a sealing gasket is further disposed between the constant pressure shear blade and the first end surface of the second stepped hole.
Optionally, a thread is arranged on an inner wall of the first stepped hole, a hollow compression nut is arranged in the first stepped hole, and the hollow compression nut and the thread are matched and screwed in the first stepped hole and abut against the constant pressure shearing sheet to fix the constant pressure shearing sheet.
Optionally, the thickness of the second stepped hole, the thickness of the sealing gasket, the thickness of the constant-pressure shear slice and the thickness of the hollow compression nut are less than or equal to the thickness of the main pipe.
Optionally, the cross-sectional area of the energy release hole is calculated and determined according to the following formula:
in the formula: a-cross-sectional area of energy-releasing hole, m 2 ；
The mass of carbon dioxide filled in the M-fracturing unit is kg;
rho-density of sprayed carbon dioxide gas-liquid mixture, kg/m 3 ；
T-temperature of the sprayed carbon dioxide gas-liquid mixture, DEG C;
v-the speed of the sprayed carbon dioxide gas-liquid mixture, m/s;
and the diameter of the energy leakage hole is calculated according to the sectional area A.
Optionally, the heating rod comprises a base and a paper tube arranged on the base, the paper tube is arranged in the main tube cavity, a heating agent is filled in the paper tube, and an ignition head is further arranged in the paper tube;
the base of the heating rod is screwed in the mounting through hole of the filling head, a hole channel is reserved on the base, and the wiring terminal is mounted in the hole channel and extends into the paper tube to be connected with the ignition head.
Optionally, the main pipe is a pipe body made of special steel, and the tensile strength of the main pipe is at least 600MPa.
Compared with a structure that the energy release holes are arranged at the end of the carbon dioxide cracking device, the carbon dioxide cracking device with the multi-hole symmetrical energy release cutting along the axial direction of the drill hole, provided by the embodiment of the invention, has the advantages that the structure of the cracking device is improved, at least one group of energy release holes are arranged on the side wall of the main pipe, each group of energy release holes comprises a plurality of energy release holes which are arranged along the axial direction of the main pipe at intervals, and the plurality of energy release holes are arranged in a collinear manner along the axial direction. Like this, not only reduced and let out the ability head, when the liquid carbon dioxide in the stick heating cavity that generates heat moreover reaches predetermined pressure, high-pressure carbon dioxide gas-liquid mixture efflux outwards releases along the energy hole that lets out that a plurality of collineations set up, forms the purpose of directional cutting coal rock mass along the directional joint-cutting of drilling axial, realizes the directional fracture control blasting of rock mass to reduce the unnecessary damage of country rock, improve the blasting effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a porous symmetrical energy-leaking lancing carbon dioxide fracturing device along the axial direction of a drill hole according to an embodiment of the invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of a portion of the vent hole of FIG. 1 or FIG. 2;
fig. 4 is a schematic three-dimensional structure diagram of a porous symmetrical energy-leaking lancing carbon dioxide fracturing device along the axial direction of a drill hole according to an embodiment of the invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be apparent that numerous technical details are set forth in the following specific examples in order to provide a more thorough description of the present invention, it should be apparent to one skilled in the art that the present invention may be practiced without some of these details. In addition, some methods, means, components and applications thereof which are well known to those skilled in the art are not described in detail in order to highlight the gist of the present invention, but the present invention is not influenced. The embodiments described herein are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the porous symmetrical energy-releasing lancing carbon dioxide fracturing device provided by the embodiment of the invention has a simple structure, is suitable for rock blasting in mine engineering, and is particularly suitable for directional pre-splitting blasting control occasions with the requirement of controlling rock blasting forming.
Referring to fig. 1 and 2, the device comprises: the heating device comprises a main pipe 100, a filling head 200 and a heating rod 300, wherein the filling head 200 is connected to a first end of the main pipe 100, specifically, the main pipe 100 is made of special steel, and the tensile strength of the main pipe is at least 600MPa; the main pipe 100 and the filling head 200 are connected by screw threads, and can be assembled and disassembled repeatedly.
A filling channel for filling carbon dioxide into the main pipe 100 is arranged on the filling head 200, and a needle valve 201 for opening and closing the filling channel is arranged in the filling channel; among them, the Needle valve 201 (Needle valve) is a fine adjustment valve, and its valve plug is Needle-shaped, mainly used for adjusting flow, and the Needle valve plug is generally made of a long Needle made of quenched steel, and the valve seat is made of soft materials such as tin, copper, etc. The sealing between the valve needle and the valve seat is achieved by the close fit of the conical surfaces of the valve needle and the valve seat. The taper of the valve needle has two taper angles of 1.
The filling head 200 and the filling channel are axially arranged in parallel and are provided with mounting through holes, the first end of the heating rod 300 is arranged in the mounting through holes, the second end of the heating rod 300 is arranged in the main pipe 100, a cavity 101 is arranged between the heating rod 300 and the inner wall of the main pipe 100, liquid carbon dioxide is filled in the cavity 101, the heating rod 300 is used for providing heat energy for the gasification of the liquid carbon dioxide, and the first end of the heating rod 300 is also provided with a binding post 301.
The lateral wall of the main pipe 100 is at least provided with a group of energy release holes 110, each group of energy release holes 110 comprises a plurality of energy release holes 110 which are arranged along the axial direction of the main pipe 100 at intervals, and the plurality of energy release holes 110 are arranged in a collinear manner along the axial direction, so that the purpose of directionally releasing energy similar to an axial lancing is achieved, and the directional blasting effect towards the inner wall of the drill hole along the axial direction of the drill hole is realized.
In some embodiments, a plurality of the bleed holes 110 are spaced axially along the main tube 100; the energy release holes 110 may be circular holes, rectangular slotted holes, round-head rectangular slotted holes, or the like.
When the fracturing device is started, a high-energy high-pressure carbon dioxide gas-liquid mixture (fluid) in the main pipe 100 is simultaneously released outwards from each energy release hole 110, a coherent linear cutting jet flow is formed along the axial direction of the body of the fracturing device and uniformly acts on the hole wall, and the aim of controlling the crushing degree and the cracking direction of a blasted medium and effectively protecting surrounding rocks is fulfilled by controlling the distribution of a blasting stress field and the quasi-static action of blasting gas on the medium; and the efflux direct action is in the coal rock mass, and the coal rock mass is less with the gap that sends between the ware outer wall that splits, and the energy that carbon dioxide gas-liquid mixture carried is along the journey loss less, can solve traditional energy release head energy disorder release and lead to the problem of quick decay.
Compared with the structure that the energy release holes 110 are arranged at the end of the carbon dioxide cracking device, the carbon dioxide cracking device with the multi-hole symmetrical energy release cutting along the axial direction of the drill hole provided by the embodiment of the invention improves the structure of the cracking device, at least one group of energy release holes 110 are arranged on the side wall of the main pipe 100, each group of energy release holes 110 comprises a plurality of energy release holes 110 which are arranged along the axial direction of the main pipe 100 at intervals, and the plurality of energy release holes 110 are arranged in a collinear manner along the axial direction. Therefore, energy leakage heads are reduced, and when the heating rod 300 heats the liquid carbon dioxide in the cavity 101 to a preset pressure, high-pressure carbon dioxide gas-liquid mixed jet flow is released outwards along the energy leakage holes 110 which are arranged collinearly, so that the purpose of directionally cutting coal and rock mass along the axial directional joint of the drill hole is achieved, the directional fracture controlled blasting of the rock mass is realized, the unnecessary damage of surrounding rocks is reduced, and the blasting effect is improved.
With continued reference to FIG. 2, in some embodiments, two sets of the energy discharge holes 110 are disposed on the sidewall of the main pipe 100, and the two sets of the energy discharge holes 110 are symmetrically disposed about the axial section of the main pipe 100. When the blasting is implemented, when the carbon dioxide fracturing device in this embodiment is placed in a drill hole, the energy release holes 110 symmetrical on two sides of the main pipe 100 of the fracturing device should be placed towards the pre-designed cutting direction, and after the fracturing device is started, high-pressure carbon dioxide gas-liquid mixed jet flow is released along the energy release holes 110 symmetrical on two sides, so as to achieve the purpose of directionally cutting the coal rock mass.
With continued reference to fig. 2 and 3, the energy release hole 110 is further provided with a constant pressure shear slice 111; when the liquid carbon dioxide in the main pipe 100 reaches the threshold pressure of the constant pressure shear slice 111, the constant pressure shear slice 111 can be damaged by high pressure shearing, so that the channel of the energy release hole 110 is opened, and the gas-liquid mixed jet of the high pressure carbon dioxide is released, thereby achieving the purpose of directionally cutting the coal rock mass; wherein, the outer contour shape of the constant pressure shear slice is consistent with the inner contour shape of the energy leakage hole 110.
Referring to fig. 3, the energy discharging hole 110 is a stepped hole, and at least includes a first step hole 112 and a second step hole 113 connected to the first step hole 112, a first end of the first step hole 112 is located at or near the outer wall of the main pipe 100, a second end of the first step hole 112 is connected to a first end of the second step hole 113, and a second end of the second step hole 113 is located at the inner wall of the main pipe 100; the diameter of the first stepped hole 112 is greater than the diameter of the second stepped hole 113, and the constant pressure shear blade 111 is disposed at the second end of the first stepped hole 112 and fixed to the first end face of the second stepped hole 113. In this embodiment, the energy release hole 110 is set to be a step-like structure, so that the aperture of the part close to the inner wall of the main pipe 100 is small, and the aperture of the part close to the outer wall of the main pipe 100 is large, thereby facilitating installation of parts such as the constant pressure shearing sheet 111 in the energy release hole 110.
In still other embodiments, a sealing gasket 114 is further disposed between the constant pressure shear blade 111 and the first end surface of the second step hole 113, and is used for ensuring the sealing performance inside the main pipe 100 before the fracturing device is started.
Specifically, a thread is provided on an inner wall of the first stepped hole 112, a hollow compression nut 115 is provided in the first stepped hole 112, the hollow compression nut 115 is screwed into the first stepped hole 112 in cooperation with the thread, and abuts against the constant pressure shear blade 111 to fix the constant pressure shear blade 111.
In the embodiment, the sizes of the constant pressure shearing sheet 111, the hollow compression nut 115 and the sealing gasket are relatively small, and the assembling process is simpler than that of the traditional carbon dioxide fracturing device and is easy to operate.
In addition, it can be understood that the thickness of the second step hole 113 is too large, and the space left for the upper part of the second step hole 113 is occupied, which is not favorable for the installation of the constant pressure shear blade 111 and the hollow compression nut 115; if the thickness of the second step hole 113 is too small, the second step hole 113 is easily damaged during the blasting process, and the main pipe 100 is scrapped, which is not favorable for recycling. Since the thickness of the second step hole 113 is related to the maximum burst pressure of the fracker, the thickness of the second step hole 113 can be determined according to the maximum burst pressure of the fracker.
In some embodiments, the thickness of the second step hole 113 + the thickness of the sealing gasket 114 + the thickness of the constant pressure shear plate 111 + the thickness of the hollow compression nut 115 is less than or equal to the thickness of the main tube 100. This ensures that the frac is fed into the borehole without scraping the borehole wall.
It can be understood that the energy-releasing hole 110 on the main pipe 100 is equivalent to a nozzle of high-pressure jet flow, the size of the diameter of the nozzle determines the acting area of the jet flow and the acting time of the jet flow, and further influences the intensity and the attenuation speed of the jet flow, in the shape structure of some energy-releasing holes 110, the energy-releasing holes can be approximately regarded as cylindrical nozzles, the sizes of the inlet and outlet diameters are basically the same, and the size difference of the inlet and outlet apertures is basically negligible. In some embodiments, the aperture of the vent 110 is determined by:
the sectional area of the energy discharge hole 110 is determined by calculation according to the following formula:
in the formula: a-cross-sectional area of energy-releasing hole, m 2 ；
The mass of carbon dioxide filled in the M-fracturing unit is kg;
rho-density of sprayed carbon dioxide gas-liquid mixture, kg/m 3 ；
T-temperature of the sprayed carbon dioxide gas-liquid mixture, DEG C;
v-the speed of the sprayed carbon dioxide gas-liquid mixture, m/s;
after the sectional area a is calculated, the diameter of the energy release hole 110 is calculated according to the sectional area a according to the area formula of the circle.
When the energy release hole 110 is a stepped hole in the previous embodiment, the diameter of the energy release hole 110 is replaced by the diameter of the first step hole 112 of the energy release hole 110, and the sectional area of the first step hole 112 can still be determined according to the above formula, and the diameter can be obtained.
In the embodiment, a specific solution for determining the diameter of the energy release hole 110 is provided, the sectional area of the energy release hole 110 is obtained according to the above calculation formula, and then the diameter of the energy release hole 110 is obtained, so that key technical parameters are provided for the design of the energy release hole 110, the maximum efficiency is achieved when the method is applied, and equipment support and technical support are provided for directional fracture control blasting.
With continued reference to fig. 2, in some embodiments, the heating rod 300 includes a base 302 and a paper tube 303 disposed on the base 302, the paper tube 303 is disposed in the cavity of the main tube 100, a heating agent 304 is filled in the paper tube 303, and an ignition head 305 is further disposed in the paper tube 303; the ignition head 305 is an electric ignition head, which facilitates detonation control.
The base 302 of the heating rod 300 is screwed in the mounting through hole of the filling head 200, a hole is reserved on the base 302, and the binding post 301 is mounted in the hole and extends into the paper tube 303 to be connected with the ignition head 305. The exothermic agent 304 is a mixture which can emit heat when a chemical reaction occurs under a certain temperature condition, and the components of the exothermic agent 304 can be the finished product of the exothermic agent 304 which is sold on the market; preferably, the heat generating agent 304 in the present embodiment is mainly composed of copper perchlorate, magnesium perchlorate, or the like.
After the electric ignition device is ignited, the heating agent 304 burns at a high speed, and heat is provided for the gasification of the liquid carbon dioxide, so that the pressure in the pipe can be increased sharply, and the required gas pressure for destroying the constant pressure shearing sheet 111 in the energy release hole 110 can be obtained quickly.
According to the carbon dioxide cracking device with the multi-hole symmetrical energy-discharging cutting seam along the axial direction of the drill hole, the plurality of energy-discharging holes 110 are axially formed in the wall of the cracking device, so that high-energy and high-pressure gas can directionally release a high-energy and high-pressure carbon dioxide gas-liquid mixture along the plurality of energy-discharging holes 110 formed in the axial direction, a coherent linear cutting jet flow is formed, and the purpose of directional fracture control blasting is achieved; furthermore, the energy discharge head of the traditional carbon dioxide cracking device is reduced, so that the structure is simple and the cost is low; furthermore, the main body part of the carbon dioxide cracking device provided by the embodiment of the invention can be basically reused, so that the blasting cost is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a follow porous symmetry of drilling axial and let out ability joint-cutting carbon dioxide and send and split ware which characterized in that includes: the carbon dioxide filling device comprises a main pipe, a filling head and a heating rod, wherein the filling head is connected to the first end of the main pipe, a filling channel for filling carbon dioxide into the main pipe is arranged on the filling head, and a needle valve for opening and closing the filling channel is arranged in the filling channel; the valve plug of the needle valve is needle-shaped and used for adjusting the flow, and the needle-shaped valve plug is made of a quenched steel long needle;
the filling head is axially parallel to the filling channel and is also provided with an installation through hole, the first end of the heating rod is arranged in the installation through hole, the second end of the heating rod is arranged in the main pipe, a cavity is arranged between the heating rod and the inner wall of the main pipe, liquid carbon dioxide is filled in the cavity, and the first end of the heating rod is also provided with a binding post;
two groups of energy discharging holes are arranged on the side wall of the main pipe, each group of energy discharging holes comprises a plurality of energy discharging holes which are arranged at intervals along the axial direction of the main pipe, and the plurality of energy discharging holes are arranged in a collinear way along the axial direction to form coherent linear cutting jet flow;
the energy release hole is a stepped hole, a constant pressure shear slice is arranged in the energy release hole, the energy release hole at least comprises a first stepped hole and a second stepped hole connected with the first stepped hole, the first end of the first stepped hole is positioned at or close to the outer wall of the main pipe, the second end of the first stepped hole pipe is connected with the first end of the second stepped hole, and the second end of the second stepped hole is positioned at the inner wall of the main pipe;
the diameter of the first stepped hole is larger than that of the second stepped hole, and the constant pressure shearing sheet is arranged at the second end of the first stepped hole and fixed on the end surface of the first end of the second stepped hole;
a sealing gasket is arranged between the constant pressure shear slice and the first end face of the second stepped hole;
the inner wall of the first stepped hole is provided with threads, a hollow compression nut is arranged in the first stepped hole, the hollow compression nut and the threads are matched and screwed in the first stepped hole and abut against the constant pressure shearing sheet to fix the constant pressure shearing sheet;
the thickness of the second step hole, the thickness of the sealing gasket, the thickness of the constant-pressure shear slice and the thickness of the hollow compression nut are less than or equal to the thickness of the main pipe.
2. The carbon dioxide fracker of claim 1, wherein the two sets of energy discharge holes are symmetrically disposed about the axial cross-section of the main pipe.
3. The carbon dioxide fracker of claim 1, wherein the cross-sectional area of the energy release holes is calculated according to the following formula:
in the formula: a-cross-sectional area of energy-releasing hole, m 2 ；
The mass of carbon dioxide filled in the M-fracturing unit is kg;
rho-density of sprayed carbon dioxide gas-liquid mixture, kg/m 3 ；
T-temperature of the sprayed carbon dioxide gas-liquid mixture, DEG C;
v-the speed of the sprayed carbon dioxide gas-liquid mixture, m/s;
and the diameter of the energy leakage hole is calculated according to the sectional area A.
4. The carbon dioxide cracking device of claim 1, wherein the heating rod comprises a base and a paper tube arranged on the base, the paper tube is arranged in the main tube cavity, a heating agent is filled in the paper tube, and an ignition head is further arranged in the paper tube;
the base of the heating rod is screwed in the mounting through hole of the filling head, a hole channel is reserved on the base, and the wiring terminal is mounted in the hole channel and extends into the paper tube to be connected with the ignition head.
5. The carbon dioxide fracker of claim 1, wherein said main pipe is a pipe body made of a special steel material and having a tensile strength of at least 600MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053303.6A CN113790052B (en) | 2021-09-08 | 2021-09-08 | Porous symmetrical energy-releasing joint cutting carbon dioxide fracturing device along axial direction of drill hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053303.6A CN113790052B (en) | 2021-09-08 | 2021-09-08 | Porous symmetrical energy-releasing joint cutting carbon dioxide fracturing device along axial direction of drill hole |
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| Publication Number | Publication Date |
|---|---|
| CN113790052A CN113790052A (en) | 2021-12-14 |
| CN113790052B true CN113790052B (en) | 2022-10-28 |
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| CN202111053303.6A Active CN113790052B (en) | 2021-09-08 | 2021-09-08 | Porous symmetrical energy-releasing joint cutting carbon dioxide fracturing device along axial direction of drill hole |
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