CN221032601U - Coal seam liquid carbon dioxide fracturing device - Google Patents
Coal seam liquid carbon dioxide fracturing device Download PDFInfo
- Publication number
- CN221032601U CN221032601U CN202323251430.4U CN202323251430U CN221032601U CN 221032601 U CN221032601 U CN 221032601U CN 202323251430 U CN202323251430 U CN 202323251430U CN 221032601 U CN221032601 U CN 221032601U
- Authority
- CN
- China
- Prior art keywords
- stock solution
- head
- solution pipe
- carbon dioxide
- liquid storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 67
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 30
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 30
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 239000011550 stock solution Substances 0.000 claims abstract description 23
- 230000002265 prevention Effects 0.000 claims description 9
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000005422 blasting Methods 0.000 abstract description 36
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 10
- 239000011435 rock Substances 0.000 description 10
- 230000000670 limiting effect Effects 0.000 description 9
- 230000002829 reductive effect Effects 0.000 description 6
- 230000005465 channeling Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The application discloses a coal bed liquid carbon dioxide fracturing device, and belongs to the technical field of blasting. Including inflating head and stock solution pipe and release head, the outer wall annular distribution of stock solution pipe has a plurality of mechanisms of preventing scurring, prevent scurring the mechanism and include the conical head pole, the one end that conical head pole is close to the release head rotates with the stock solution pipe and is connected, elastic connection between conical head pole and the stock solution pipe, threaded connection has useful lag on the stock solution pipe, prevent scurring the mechanism and can accomodate in the lag, the lag is the same with the stock solution pipe external diameter, has realized avoiding in the blasting process to inflate head and stock solution pipe and release head outwards to strike and deviate from the problem of the burst strength decline of inversion, avoids simultaneously when the blasthole opening down to inflate head and stock solution pipe and release head from downthehole breaking away from, and need not to block up mud shutoff, reduces the extravagant technological effect of manpower and materials.
Description
Technical Field
The application relates to the technical field of blasting, in particular to a coal seam liquid carbon dioxide fracturing device.
Background
In the coal mining process, hydraulic fracturing is usually carried out on a coal seam, but the hydraulic fracturing has a certain problem in terms of application process and application range, one or more artificial cracks perpendicular to the minimum horizontal main stress are easily formed in the water injection process by the hydraulic fracturing technology, the number of cracks is small, a residual pressure area 'stress cage area' is easily formed, the permeability of the coal seam is reduced, and the hydraulic fracturing has the condition of polluting the coal seam, so that people replace the hydraulic fracturing by adopting liquid carbon dioxide fracturing to fracture the liquid carbon dioxide into the coal seam through coal seam fracturing equipment, after the high-pressure carbon dioxide fracturing is used for making the seam, the liquid carbon dioxide absorbs heat and changes phase to expand in the stratum, the liquid carbon dioxide changes the volume to expand by nearly 600 times, when an air charging head, a liquid storage pipe and a release head are inserted into a blasthole of the rock stratum, a huge impact force is generated in the blasthole when energy is instantaneously released, one part of the impact force is used for realizing the purpose of blasting the rock stratum, the other part of impact force is outwards released through the blasthole, the air charging head, the liquid storage pipe and the release head can be caused in the process of releasing the liquid storage pipe and the liquid storage pipe outwards impact, the impact force is caused in the process of releasing part of the blasthole through the blasthole, when the rock stratum is reversely, the impact force is released through the hole is reduced, and the pressure is required to be reduced, when the blast hole is required to be reversely stressed, and the blast hole is required to be opened, and the blast hole is blocked and the hole is opened, and the hole is opened when the hole is opened, and the hole is filled and is opened.
In view of this, we propose a coal seam liquid carbon dioxide fracturing device.
Disclosure of utility model
1. Technical problem to be solved
The application aims to provide a coal seam liquid carbon dioxide fracturing device, which solves the technical problems in the background art, solves the problem of reduced bursting strength caused by outwards impacting an inflating head, a liquid storage pipe and a releasing head to separate from an inverted state in the bursting process, and simultaneously avoids separating the inflating head, the liquid storage pipe and the releasing head from a hole when an opening of a blasthole is downward, and has the technical effects of avoiding blocking mud and reducing waste of manpower and material resources.
2. Technical proposal
The technical scheme of the application provides a coal seam liquid carbon dioxide fracturing device which comprises an inflation head, a liquid storage pipe and a release head, wherein a plurality of anti-channeling mechanisms are annularly distributed on the outer wall of the liquid storage pipe, each anti-channeling mechanism comprises a conical head rod, one end of each conical head rod, which is close to the release head, is rotationally connected with the liquid storage pipe, each conical head rod is elastically connected with the liquid storage pipe, a useful protective sleeve is connected onto the liquid storage pipe in a threaded manner, each anti-channeling mechanism can be stored in each protective sleeve, and the outer diameters of the protective sleeves are the same as that of the liquid storage pipe.
Through adopting above-mentioned technical scheme, aerify head and stock solution pipe and release head and constitute the blast pipe, the spiral rotates the lag, the lag breaks away from with scurrying prevention mechanism, this moment is under the elastic resilience effort, the conical head pole uses the lower extreme to outwards overturn at the blasthole, every two adjacent conical head poles form the structure of falling V, when inserting the blast hole of rock stratum seting with the release head, the conical head section of conical head pole is extruded to the inner wall of blasthole, make whole can insert in the blasthole, liquid carbon dioxide in the stock solution pipe absorbs heat phase change inflation in the stratum, the impact force in the blasthole increases rapidly, and produce an effort that outwards promotes the blast pipe, the conical head section of conical head pole at this moment is used in the inner wall of blasthole, and after the conical head section pricks into the blasthole wall, fix the blast pipe in the inside of blasthole, avoid a large amount of impact force to release through the blasthole, and when the opening of blasthole down, under the effect of conical head pole, when conical head section drops on the inner wall of hole blasting, can not need to reduce and prick the pipe, and need not to carry out, avoid taking in the material resources to stop up, the plug in the process, prevent the plug from being carried in the lag, the protection device is avoided.
As an alternative scheme of the technical scheme of the application, the outer wall of the liquid storage tube is provided with an annular groove, the channeling-preventing mechanism further comprises an ear plate and a spring, the ear plate is fixed on the inner wall of the groove, the ear plate is rotationally connected with the conical head rod shaft, and the spring is fixedly arranged between the conical head rod and the groove.
Through adopting above-mentioned technical scheme, the one end that the release head was kept away from to the awl head pole is the awl head section to the lower extreme is connected with the otic placode axle rotation, under the elastic support effect of spring, makes the awl head pole outwards overturn as the axle center with the axostylus axostyle of otic placode, can keep the state that offsets with the inner wall of blasthole when guaranteeing that the awl head pole inserts the blasthole, and prevent scurring mechanism arranges in the recess in, so that prevent scurring mechanism after making accomodate is less than the external diameter of liquid reserve pipe, guarantee that the blast pipe can be smooth inserts the blasthole.
As an alternative scheme of the technical scheme of the application, one side of the conical head rod, which is close to the liquid storage tube, is provided with a strip-shaped groove, and one end of the spring is fixed in the strip-shaped groove.
Through adopting above-mentioned technical scheme, the one end and the recess inner wall of spring are fixed, and the other end is fixed in the bar inslot to the spring is compressed to the bar inslot when the awl head pole is close to the liquid reserve pipe, in order to avoid the spring to interfere the accomodating of awl head pole.
As an alternative scheme of the technical scheme of the application, a limiting block is fixedly arranged on the lug plate, an included angle between the limiting block and the axis of the liquid storage pipe is an acute angle, a U-shaped groove is formed in one side, far away from the liquid storage pipe, of the conical head rod, and the limiting block is arranged in the U-shaped groove.
Through adopting above-mentioned technical scheme, when the awl head pole outwards overturns to when the tank bottom of U type groove offsets with the stopper one side that is close to the liquid reserve pipe, carry out spacingly with the deflection angle to the awl head pole, avoid excessive upset to lead to the awl head pole to bend.
As an alternative to the technical solution of the present application, the protecting sleeve includes a threaded section and a sleeve section, the threaded section is in threaded connection with the liquid storage tube, the sleeve section is disposed on the tapered rod side, and the sleeve section is larger than the inner diameter of the threaded section.
Through adopting above-mentioned technical scheme, screw thread section and recess lower extreme threaded connection, when the sleeve pipe section is arranged in the lower extreme of preventing scurring the mechanism, under the spring elasticity resilience effect this moment, the awl head pole outwards overturns to put into the blast hole after, in order to realize the blast pipe and prevent scurring the purpose, make the sleeve pipe section upward movement when rotating the screw thread section, and make the awl head pole inwards overturn, the spring is compressed, in order to make prevent scurring the mechanism and accomodate to the lag, in order to avoid the awl head pole to stab the blasting personnel.
3. Advantageous effects
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. According to the application, the protective sleeve is separated from the anti-channeling mechanism, the cone head rods are turned outwards by taking the lower end as the axis, every two adjacent cone head rods form an inverted V structure, when the release heads are inserted into the blastholes formed in the rock stratum, the cone head sections of the cone head rods act on the inner walls of the blastholes, and after the cone head sections are pricked into the inner walls of the blastholes, the blasting tubes are fixed in the blastholes, so that a large amount of impact force is prevented from being released through the blastholes, the blasting strength of the rock stratum is improved, and when the openings of the blastholes face downwards, under the action of the cone head rods, when the cone head sections of the cone head rods are pricked on the inner walls of the holes, the blasting tubes can be prevented from falling, blocking of mud is not needed, and the waste of manpower and material resources is reduced;
2. after the use of the application is finished, the protective sleeve is rotated, so that the anti-channeling mechanism is contained in the protective sleeve, and the pricking of blasting personnel by the cone head rod in the carrying process is avoided.
Drawings
FIG. 1 is a schematic view showing a state of a conical head rod of a coal bed liquid carbon dioxide fracturing device according to a preferred embodiment of the present application being stored in a protective sleeve;
FIG. 2 is a schematic view showing the structure of a bit rod in an expanded state of a coal bed liquid carbon dioxide fracturing device according to a preferred embodiment of the present application;
FIG. 3 is a schematic view showing a state of the coal bed liquid carbon dioxide fracturing device according to the preferred embodiment of the present application;
FIG. 4 is an enlarged schematic view of the apparatus for fracturing liquid carbon dioxide in coal seam according to the preferred embodiment of the present application;
FIG. 5 is a schematic view of a partial structure of a liquid storage pipe of a coal seam liquid carbon dioxide fracturing device according to a preferred embodiment of the present application;
FIG. 6 is a schematic view of a conical head rod of a fracturing device for liquid carbon dioxide in a coal seam according to a preferred embodiment of the present application;
FIG. 7 is a schematic view of a broken-away structure of a conical head rod of a coal bed liquid carbon dioxide fracturing apparatus according to a preferred embodiment of the present application;
FIG. 8 is a schematic diagram of a jacket structure of a fracturing device for liquid carbon dioxide in a coal seam according to a preferred embodiment of the present application;
FIG. 9 is a schematic diagram showing a cut-away structure of a protective jacket of a coal seam liquid carbon dioxide fracturing apparatus according to a preferred embodiment of the present application;
The reference numerals in the figures illustrate: 1. an inflation head; 2. a liquid storage tube; 201. a groove; 3. a release head; 4. an anti-channeling mechanism; 401. a tapered rod; 4011. a bar-shaped groove; 4012. a U-shaped groove; 402. a spring; 403. ear plates; 4031. a limiting block; 5. a protective sleeve; 501. a threaded section; 502. a casing section; 6. a rock formation; 601. and (5) blasting holes.
Detailed Description
The application is described in further detail below with reference to the drawings.
The utility model provides a coal seam liquid carbon dioxide fracturing device, including charging head 1 and stock solution pipe 2 and release head 3, the outer wall annular distribution of stock solution pipe 2 has a plurality of scurrying prevention mechanism 4, scurrying prevention mechanism 4 includes awl head rod 401, awl head rod 401 is close to the one end of release head 3 and stock solution pipe 2 rotation is connected, elastic connection between awl head rod 401 and the stock solution pipe 2, threaded connection has useful lag 5 on the stock solution pipe 2, scurrying prevention mechanism 4 can be accomodate to lag 5 in, lag 5 is the same with stock solution pipe 2 external diameter.
Referring to fig. 1-9, the blasting tube is formed by the inflation head 1, the liquid storage tube 2 and the release head 3, the protection sleeve 5 is spirally rotated, the protection sleeve 5 is separated from the anti-channeling mechanism 4, at this time, under elastic resilience acting force, the cone head rod 401 is outwards turned by taking the lower end as the axis, every two adjacent cone head rods 401 form an inverted V structure, when the release head 3 is inserted into the blasting hole 601 formed by the rock stratum 6, the inner wall of the blasting hole 601 extrudes the cone head section of the cone head rod 401, so that the whole body can be inserted into the blasting hole 601, when liquid carbon dioxide in the liquid storage tube 2 absorbs heat and is subjected to phase change expansion in the stratum, the impact force in the blasting hole 601 is rapidly increased, and an acting force for outwards pushing the blasting tube is generated, at this time, the cone head section of the cone head rod 401 acts on the inner wall of the blasting hole 601, and after the cone head section is pricked into the inner wall of the blasting hole 601, a large amount of impact force is prevented from being released through the blasting hole 601, the blasting strength of the rock stratum 6 is improved, and when the opening of the blasting hole 601 is downward, the cone head rod 401 is prevented from being pricked, the impact force is prevented from being reduced, the loss of the protection sleeve 5 is avoided, and the personnel is prevented from being damaged by the protection sleeve 5 when the protection sleeve is required to be rotated, and the protection sleeve is not required to be pricked, and the protection sleeve 5 is required to be rotated, and is prevented.
The outer wall of the liquid storage pipe 2 is provided with an annular groove 201, the channeling prevention mechanism 4 further comprises an ear plate 403 and a spring 402 which are fixed on the inner wall of the groove 201, the ear plate 403 is connected with the conical head rod 401 in a rotating way, and the spring 402 is fixedly arranged between the conical head rod 401 and the groove 201.
Referring to fig. 4-6, one end of the conical head rod 401, which is far away from the release head 3, is a conical head section, and the lower end of the conical head rod 401 is in axial rotation connection with the lug plate 403, so that the conical head rod 401 can outwards overturn by taking a shaft rod of the lug plate 403 as an axle center under the elastic supporting effect of the spring 402, when the conical head rod 401 is inserted into the blast hole 601, the conical head rod 401 can be kept in a propped state with the inner wall of the blast hole 601, and the channeling preventing mechanism 4 is arranged in the groove 201, so that the channeling preventing mechanism 4 after being accommodated is smaller than the outer diameter of the liquid storage tube 2, and the blast tube can be smoothly inserted into the blast hole 601.
One side of the conical head rod 401, which is close to the liquid storage tube 2, is provided with a strip-shaped groove 4011, and one end of the spring 402 is fixed in the strip-shaped groove 4011.
Referring to fig. 6, one end of the spring 402 is fixed to the inner wall of the recess 201, and the other end is fixed in the bar-shaped groove 4011 so that the spring 402 is compressed into the bar-shaped groove 4011 when the cone rod 401 approaches the liquid storage tube 2, to avoid the spring 402 interfering with the accommodation of the cone rod 401.
The ear plate 403 is fixedly provided with a limiting block 4031, an included angle between the limiting block 4031 and the axis of the liquid storage tube 2 is an acute angle, one side of the conical head rod 401, which is far away from the liquid storage tube 2, is provided with a U-shaped groove 4012, and the limiting block 4031 is arranged in the U-shaped groove 4012.
Referring to fig. 4, 5 and 7, when the tapered rod 401 is turned outwards, and when the bottom of the U-shaped groove 4012 abuts against one side of the limiting block 4031, which is close to the liquid storage tube 2, the limiting block limits the deflection angle of the tapered rod 401, so that the tapered rod 401 is prevented from being bent due to excessive turning.
The protecting sleeve 5 comprises a threaded section 501 and a sleeve section 502, wherein the threaded section 501 is in threaded connection with the liquid storage tube 2, the sleeve section 502 is arranged on the side of the conical head rod 401, and the sleeve section 502 is larger than the inner diameter of the threaded section 501.
Referring to fig. 1 and 2 and fig. 9, the threaded section 501 is in threaded connection with the lower end of the groove 201, when the sleeve section 502 is placed at the lower end of the anti-channeling mechanism 4, under the elastic rebound action of the spring 402, the cone rod 401 is turned outwards and placed in the blast hole 601 to achieve the purpose of anti-channeling of a blasting tube, when the threaded section 501 is rotated to enable the sleeve section 502 to move upwards and enable the cone rod 401 to be turned inwards, the spring 402 is compressed, so that the anti-channeling mechanism 4 is stored in the protective sleeve 5, and the cone rod 401 is prevented from stabbing blasting personnel.
Working principle: rotating screw thread section 501 makes sleeve pipe section 502 slide downwards to place the lower extreme of cone head pole 401, this moment under the elastic resilience effect of spring 402, cone head pole 401 outwards overturns with the axostylus axostyle of otic placode 403, and make stopper 4031 and the counterbalance of U type groove 4012 inner wall, this moment insert the release head 3 of blasting tube in the blasting hole 601, downthehole wall extrusion cone head pole 401, make the cone head section of cone head pole 401 remain the state that offsets with the downthehole wall all the time, detonate the blasting tube, release head 3 releases the endothermic phase transition inflation effort in the stratum of liquid carbon dioxide, the impact force in the blasting hole 601 rapidly increases, and produce an effort that promotes the blasting tube outwards, the cone head section of cone head pole 401 is used in the inner wall of blasting hole 601, fix the blasting tube in the inside of blasting hole 601, avoid a large amount of impact forces to release through the blasting hole 601, in order to improve the blasting strength to rock stratum 6, and when the opening of blasting hole 601 down, under the effect of cone head pole 401 this moment, when cone head section of cone head 401 drops on the inner wall of hole blasting, can not need to reduce the material resources to prick pipe, and avoid the pipe to roll down, and avoid the cone head section 401 to stop down, avoid the manpower to roll up to the inner diameter of pipe, prevent the cone section to be used by force down, prevent the pipe section 401 from being wasted, prevent the piston rod from moving, the compression hole 401 has, and prevent the piston rod from having to be rotated by 4, and leading to be difficult to be moved by the screw thread section 401, and has to be inclined to be broken, and the hole, and the compression mechanism is rotated, and the hole has been changed, and can be broken, and can be moved, and can be passed.
Claims (5)
1. The utility model provides a coal seam liquid carbon dioxide fracturing device, includes and aerifys first (1) and stock solution pipe (2) and release head (3), its characterized in that: the outer wall annular distribution of stock solution pipe (2) has a plurality of scurrying prevention mechanism (4), scurrying prevention mechanism (4) are including conical head pole (401), conical head pole (401) are close to the one end of release head (3) and are connected with stock solution pipe (2) rotation, elastic connection between conical head pole (401) and stock solution pipe (2), threaded connection has useful lag (5) on stock solution pipe (2), scurrying prevention mechanism (4) can accomodate in lag (5), lag (5) are the same with stock solution pipe (2) external diameter.
2. The coal seam liquid carbon dioxide fracturing device of claim 1, wherein: annular groove (201) has been seted up to the outer wall of stock solution pipe (2), scurring prevention mechanism (4) still include otic placode (403) and spring (402) of fixing at the inner wall of groove (201), otic placode (403) are connected with awl head rod (401) axle rotation, fixed mounting has spring (402) between awl head rod (401) and the groove (201).
3. The coal seam liquid carbon dioxide fracturing device of claim 2, wherein: one side of the conical head rod (401) close to the liquid storage tube (2) is provided with a strip-shaped groove (4011), and one end of the spring (402) is fixed in the strip-shaped groove (4011).
4. The coal seam liquid carbon dioxide fracturing device of claim 2, wherein: the utility model discloses a liquid storage tube, including lug plate (403) and liquid storage tube (2), lug plate (403) are last fixed mounting has stopper (4031), contained angle is the acute angle between the axis of stopper (4031) and liquid storage tube (2), U type groove (4012) have been seted up to one side that liquid storage tube (2) was kept away from to conical head pole (401), in U type groove (4012) are arranged in to stopper (4031).
5. The coal seam liquid carbon dioxide fracturing device of claim 1, wherein: the protecting sleeve (5) comprises a threaded section (501) and a sleeve section (502), wherein the threaded section (501) is in threaded connection with the liquid storage tube (2), the sleeve section (502) is arranged on the side of the conical head rod (401), and the sleeve section (502) is larger than the inner diameter of the threaded section (501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323251430.4U CN221032601U (en) | 2023-11-29 | 2023-11-29 | Coal seam liquid carbon dioxide fracturing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323251430.4U CN221032601U (en) | 2023-11-29 | 2023-11-29 | Coal seam liquid carbon dioxide fracturing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221032601U true CN221032601U (en) | 2024-05-28 |
Family
ID=91178268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323251430.4U Active CN221032601U (en) | 2023-11-29 | 2023-11-29 | Coal seam liquid carbon dioxide fracturing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221032601U (en) |
-
2023
- 2023-11-29 CN CN202323251430.4U patent/CN221032601U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102071921B (en) | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process | |
| CN201588626U (en) | Double-system longitudinal shock absorber | |
| CN107829768B (en) | Large-deformation supporting device and process capable of blasting automatic expansion anchoring structure | |
| CN107063009A (en) | A kind of micro- blasting technology that shakes of subway two-wire longspan tunnel | |
| CN104654949A (en) | Method of smooth powder charge for preventing blast hole from collapsing | |
| CN106643363A (en) | Shot hole plugging device for coal mine underground excavation | |
| CN113653520A (en) | Opposite-pulling yielding grouting anchor cable and supporting method thereof | |
| CN221032601U (en) | Coal seam liquid carbon dioxide fracturing device | |
| CN215632999U (en) | Rock burst resistant multi-section energy consumption supporting device | |
| CN101994493B (en) | Compound perforation dynamic depressurization device for oil gas well | |
| CN204283289U (en) | Oil well casing pipe shaping head | |
| CN204609784U (en) | A kind of soft seam setting of casing locking-type combined drill | |
| CN204082188U (en) | A kind of extruding, friction-type energy-absorption anchor rod | |
| CN114517702B (en) | Circulating type energy-absorbing yielding large-deformation anchoring device and using method thereof | |
| CN207393124U (en) | A kind of gas lift reverse circulation diamond bit | |
| CN201953367U (en) | Underground drilling and pressurizing integrated staged fracturing device | |
| CN211874428U (en) | Downhole buffer seating device suitable for horizontal well plunger gas lift | |
| CN111707156B (en) | Coal mine underground mining blasthole plugging mechanism | |
| CN105089502B (en) | Variable-diameter type back-reaming device and process method | |
| CN114016921A (en) | Mine reverse well reaming bit | |
| SU751956A1 (en) | Drilling tool vibration damping apparatus | |
| CN109612341A (en) | A kind of carbon dioxide fracturing device only winged device and fracturing device | |
| CN112556526A (en) | Blast hole plugging device and method | |
| CN116733013A (en) | Basalt fiber anchor rod and chemical modifier for treating expansive soil slope structure and construction method | |
| CN218454752U (en) | Prevention and cure equipment of prevention fault to mine water damage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |