CN112727427B - Controllable shock wave and gas fracturing combined fracturing yield increasing device and method - Google Patents
Controllable shock wave and gas fracturing combined fracturing yield increasing device and method Download PDFInfo
- Publication number
- CN112727427B CN112727427B CN202110042891.7A CN202110042891A CN112727427B CN 112727427 B CN112727427 B CN 112727427B CN 202110042891 A CN202110042891 A CN 202110042891A CN 112727427 B CN112727427 B CN 112727427B
- Authority
- CN
- China
- Prior art keywords
- fracturing
- valve
- hole
- pressure
- chamber
- 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
- 230000035939 shock Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 73
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- 238000005553 drilling Methods 0.000 claims abstract description 37
- 238000012856 packing Methods 0.000 claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 14
- 239000002912 waste gas Substances 0.000 claims abstract description 12
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000011068 loading method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 31
- 238000003860 storage Methods 0.000 claims description 30
- 238000009413 insulation Methods 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000004146 energy storage Methods 0.000 claims description 18
- 238000005065 mining Methods 0.000 claims description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000011707 mineral Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 210000002381 plasma Anatomy 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000638 stimulation Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 13
- 238000005422 blasting Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000002360 explosive Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
Abstract
The device comprises an air injection pipe, an air compressor, a fracturing chamber, a shock wave generator and a packer, wherein a pressure sensor, a flow sensor and a plurality of valves are arranged on the air injection pipe, a fracturing hole is formed in the side wall of the fracturing chamber, the shock wave generator is positioned in the fracturing chamber where the fracturing hole is located, and the packer is positioned in an annular space between the fracturing chamber on the upper side and the lower side of the fracturing hole and the inner hole wall of a drilling hole. The method comprises the following steps: hole distribution; drilling holes; feeding a fracturing chamber equipped with a shock wave generator and a packer into the borehole; inflating the annular packing air bags of the packer, and finishing packing by the inflated annular packing air bags; loading pulse high voltage and high current to the shock wave generator to generate controllable shock waves, and repeatedly acting on the ore body or the reservoir rock body by the controllable shock waves; loading high-pressure gas into the annular packing section, and further fracturing the ore body or the reservoir rock body to expand cracks; waste gas is recovered and depressurized; and (5) exhausting the annular packing air bag to finish deblocking.
Description
Technical Field
The invention belongs to the technical field of open-pit mine and oil gas exploitation, and particularly relates to a controllable shock wave and gas fracturing combined fracturing yield increasing device and method.
Background
Surface mining is a process of removing a covering from a mineral body to obtain a desired mineral, and generally includes the working procedures of stripping, blasting, mining and loading, and the blasting process is a key link affecting the quality, safety and economic benefits of mining the mineral body. The traditional blasting mode utilizes explosive gas generated by explosion of an explosive in a drilling hole to achieve the purpose of cracking the rock, but the traditional blasting mode has a plurality of potential safety hazards, the explosive is easy to cause safety accidents in the storage and transportation processes, the explosive can cause larger air shock waves when in use, noise and environmental pollution can be brought, and the stability of a side slope can be influenced by larger earthquake waves, so that serious secondary disasters are brought. In addition, the high-temperature explosion of raw gas in the explosion process of the open pit coal mine mining is extremely easy to consume coal bodies in the drill holes, so that a great amount of resource waste is caused.
In addition, unconventional oil gas exploitation of coal bed gas, shale oil and the like has become a global focus, and the unconventional oil gas exploitation often needs to carry out fracturing reformation on an oil gas reservoir and form a complex fracture network so as to improve the permeability and further improve the oil gas yield. Currently, unconventional hydrocarbon reservoir reforming modes mainly include a hydrostatic mode and a dynamic mode. However, hydraulic fracturing can expand clay minerals in a reservoir during fracturing, block migration channels, reduce porosity and permeability, and conversely, can reduce oil and gas production. In addition, hydraulic fracturing can waste a large amount of water resources, thereby resulting in high cost, and the fracturing fluid can pollute the stratum environment. With the increase of the exploitation depth, the hydrostatic fracturing technology such as hydraulic fracturing has the defects of poor effect, single fracture network and lower yield. Furthermore, the dynamic mode represented by high-energy gas fracturing and deep hole presplitting blasting has obvious effect on reservoir reconstruction, but the initiation mode of detonator explosive is needed, so that the characteristics of integrity and single action on the reservoir are provided, if the single action effect and the integral action effect are improved, the impact wave force is required to be increased, the strength of a well hole structure is adversely affected, and meanwhile, the risk is high and the pressure is uncontrollable.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the controllable shock wave and gas fracturing combined fracturing yield increasing device and method, which combine the controllable shock wave technology with the gas fracturing technology, are applied to open pit mining and unconventional oil and gas reservoir fracturing, solve the technical problems of high risk, uncontrollable pressure, poor blasting effect and the like existing in the traditional explosive blasting technology and deep hole pre-fracturing blasting, and solve the technical problems of water locking effect, high cost, environmental pollution and the like existing in the hydraulic fracturing reservoir fracturing.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a controllable shock wave and gas fracturing combined fracturing yield increasing device comprises an air injection pipe, an air compressor, a fracturing chamber, a shock wave generator and a packer; the air compressor is positioned outside the drilling hole, and the fracturing chamber is positioned inside the drilling hole; a fracturing hole is formed in the side wall of the fracturing chamber, and the cavity in the fracturing chamber is communicated with the drill hole through the fracturing hole; the shock wave generator is arranged in the fracturing chamber at the position of the fracturing hole; the packer is arranged in an annular space between the fracturing chambers on the upper side and the lower side of the fracturing hole and the inner hole wall of the drilling hole; the air compressor is communicated with one end of the gas injection pipe, the other end of the gas injection pipe is output in two paths, the first path is communicated with the inner cavity of the fracturing chamber, and the second path is communicated with the packer.
The fracturing chamber can adopt a single-stage structure or a multistage series structure; when the fracturing chamber adopts a single-stage structure, cylinder openings at the upper end and the lower end of the fracturing chamber are respectively plugged through a top plug and a bottom plug; when the fracturing chambers adopt a multistage serial structure, the upper end cylinder ports of the upper first-stage fracturing chambers are plugged through top plugs, adjacent fracturing chambers are connected in series in a threaded mode, and the lower end cylinder ports of the lower first-stage fracturing chambers are plugged through bottom plugs.
A first pressure sensor, a first valve, a first booster pump, a second pressure sensor, a first flow sensor, a first tee joint, a second valve, a second booster pump, a third pressure sensor, a second flow sensor, a third valve, an air storage tank, a fourth pressure sensor, a third flow sensor, a fourth valve, a four-way valve and a fifth valve are sequentially arranged on an air injection pipe between the air compressor and the fracturing chamber; the air compressor is communicated with the packer through a first tee joint, a sixth valve, a pressure reducing valve, a seventh valve, a second tee joint and a third tee joint are sequentially arranged on an air injection pipe between the first tee joint and the packer, the third tee joint is communicated with the packer in two ways, an eighth valve is arranged on a first pipeline of the third tee joint and the packer, and a ninth valve is arranged on a second pipeline of the third tee joint and the packer; the second tee joint is communicated with the four-way joint, and a tenth valve is arranged on a pipeline between the second tee joint and the four-way joint; the outside of drilling is provided with the waste gas storage tank, waste gas storage tank is linked together with the cross, has set gradually eleventh valve and fifth pressure sensor on the pipeline between cross and waste gas storage tank.
The packer comprises a circumferential bearing base, an air injection central pipe column, a circumferential packing air bag and a high-pressure closed spray head; the annular bearing base is fixedly sleeved outside the fracturing chamber, the gas injection central pipe column is fixedly inserted in the annular bearing base, and the gas injection central pipe column is communicated with the gas injection pipe; the annular packing air bag is sleeved on the circumferential outer side of the annular bearing base, and the annular packing air bag is communicated with the air injection pipe through a high-pressure closed spray head; a thrust spring is coaxially arranged on the inner side of the central orifice of the high-pressure closed spray head, one end of the thrust spring is connected with the high-pressure closed spray head, and the other end of the thrust spring is connected with a spout sealing plate.
The shock wave generator comprises an insulating shell, an energetic material, a metal wire, a high-voltage electrode, a low-voltage electrode, a top insulating support plate and a bottom insulating support plate; the top insulating support plate is fixedly arranged on the side wall of the fracturing chamber above the fracturing hole, the bottom insulating support plate is fixedly arranged on the side wall of the fracturing chamber below the fracturing hole, vent holes are formed in the top insulating support plate and the bottom insulating support plate, and the fracturing chamber is communicated with the fracturing hole through the vent holes; the insulation shell is fixedly arranged between the top insulation support plate and the bottom insulation support plate, the high-voltage electrode is arranged between the insulation shell and the top insulation support plate, the low-voltage electrode is arranged between the insulation shell and the bottom insulation support plate, the metal wire is arranged in the insulation shell, one end of the metal wire penetrates through the top cover of the insulation shell to be connected with the high-voltage electrode, and the other end of the metal wire penetrates through the bottom plate of the insulation shell to be connected with the high-voltage electrode; the energy-containing material is filled in the inner cavity of the insulating shell; the outside of the drilling is respectively provided with a high-voltage direct-current power supply, an energy storage capacitor and a control switch, the upper part of the wall of the fracturing chamber is provided with a high-voltage cable connector, and the high-voltage direct-current power supply, the energy storage capacitor, the control switch, the high-voltage cable connector and the high-voltage electrode are electrically connected through a high-voltage cable in sequence.
A sixth pressure sensor is arranged on the wall of the fracturing chamber between the packers at the upper side and the lower side of the fracturing hole, and a sensor signal adapter is arranged at the upper part of the wall of the fracturing chamber; the outside of drilling is provided with information acquisition ware and computer, first pressure sensor, second pressure sensor, third pressure sensor, fourth pressure sensor, fifth pressure sensor, first flow sensor, second flow sensor and third flow sensor's signal output part all carries out the electricity with information acquisition ware and is connected, the signal output part of sixth pressure sensor carries out the electricity with information acquisition ware through sensor signal adapter and is connected, and information acquisition ware's signal output part carries out the electricity with the computer and is connected.
The method for producing the yield by combining the controllable shock wave and the gas fracturing comprises the following steps of:
step one: determining hole distribution positions and hole distribution quantity of drilled holes according to the mining requirements of the strip mine or the fracturing requirements of the oil and gas reservoir;
step two: drilling holes at the determined hole distribution positions by using drilling equipment until the drilling holes reach a preset depth;
step three: sending a fracturing chamber equipped with a shock wave generator and a packer into a borehole;
step four: the method comprises the steps that a first valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve are adjusted to be in an open state, the rest valves are kept in a closed state, an air compressor is started at the same time, compressed air is pressurized through a first booster pump, then flows through a pressure reducing valve and enters an air injection central pipe column, compressed air regulated by the pressure reducing valve flows out of the air injection central pipe column and directly enters an annular sealing air bag, a spout sealing plate is in an open state at the moment, the compressed air can smoothly pass through a high-pressure closed spray nozzle to enable the annular sealing air bag to be inflated gradually until the inflated annular sealing air bag is tightly adhered to the inner wall of a drilling hole, the pressure in the high-pressure closed spray nozzle gradually rises along with continuous injection of the compressed air, when the pressure exceeds the spring force of a thrust spring, the pressure is enabled to enable a spout sealing plate to be closed at the moment, the annular sealing air bag is inflated, annular sealing of the drilling holes on the upper side and the lower side of a fracturing hole is completed, an annular sealing section is formed, then all the valves are closed rapidly, and the air compressor and the first booster pump is closed;
step five: the method comprises the steps of adjusting a first valve, a sixth valve, a seventh valve, a tenth valve and a fifth valve to an open state, keeping other valves in a closed state, starting an air compressor, pressurizing compressed air through a first booster pump, then regulating pressure through a pressure reducing valve, enabling the compressed air regulated by the pressure reducing valve to enter a circumferential packing section of a drill hole sequentially through an inner cavity of a fracturing chamber, a vent hole and a fracturing hole, detecting the pressure in the circumferential packing section in real time by a sixth pressure sensor, closing all the opened valves after the pressure in the circumferential packing section reaches a set value, and closing the air compressor and the first booster pump;
step six: starting a high-voltage direct-current power supply to charge an energy storage capacitor, when the electric quantity stored in the energy storage capacitor reaches a set value, switching on a control switch, loading pulse high-voltage high current generated by the energy storage capacitor onto a high-voltage electrode through a high-voltage cable and a high-voltage cable connector, discharging the high-voltage electrode through a metal wire, instantly depositing a large amount of energy after the pulse high-voltage high current is loaded onto the metal wire, further enabling the metal wire to generate phase change so as to expand rapidly, generating strong shock waves, generating composite plasmas at the same time, and driving an energy-containing material to generate controllable shock waves, wherein the controllable shock waves repeatedly act on a mineral body or a reservoir rock body through a fracturing hole;
step seven: the method comprises the steps of adjusting a first valve, a second valve, a third valve, a fourth valve and a fifth valve to be in an open state, keeping other valves in a closed state, starting an air compressor, carrying out primary pressurization on compressed air through a first booster pump, carrying out secondary pressurization through a second booster pump, directly entering compressed air after the secondary pressurization into an air storage tank for storage, and then entering a circumferential packing section of a drill hole through an inner cavity of a fracturing chamber, an air vent and a fracturing hole by high-pressure gas outputted by the air storage tank in sequence to further fracture a mineral body or a reservoir rock body so as to expand cracks;
step eight: maintaining the opening state of the fifth valve, closing all other opened valves, simultaneously closing the air compressor, the first booster pump and the second booster pump, then opening an eleventh valve, recovering waste gas through the waste gas storage tank, realizing pressure relief, and finally closing the fifth valve and the eleventh valve;
step nine: the eighth valve, the ninth valve, the tenth valve and the eleventh valve are adjusted to be in an opening state, the pressure in the high-pressure closed spray nozzle is instantaneously reduced, the thrust spring is restored to an extension state from a compression state, at the moment, the spout sealing plate is restored to the opening state from the closing state, the annular sealing air bag is gradually retracted and exhausted, the exhausted gas is recovered through the waste gas storage tank, and after the annular sealing air bag is retracted to an initial volume, the deblocking is finished.
The invention has the beneficial effects that:
1. the fracturing and rock breaking effects are good. In the open pit mining and unconventional oil and gas reservoir fracturing, the controllable shock wave technology has the advantages of large action range, repeated action and the like, can communicate with natural cracks to generate more cracks, and meanwhile, the gas fracturing technology has the advantage of strong gas diffusion capability, can further expand the cracks to form a complex fracture network, and can lead the ore body or the reservoir rock body to generate fatigue damage in a mode of combining transient fracturing and steady-state fracturing, thereby reducing the fracture pressure of the ore body or the reservoir rock body; the fracturing chamber can adopt a multi-stage serial structure and is sealed and isolated at the same time, so that multi-stage and multi-reservoir fracturing and rock breaking are realized.
2. The pressure is controllable. The controllable shock wave technology has the advantage of controllable frequency, and the gas fracturing can effectively improve the grade of mineral resources in the exploitation of strip mines by controlling the pressure and the flow, and meanwhile, the damage to the strength of a well hole structure can be avoided in the fracturing of unconventional oil and gas reservoirs.
3. The safety is good. The invention adopts the controllable shock wave technology to replace the traditional explosive blasting technology in the mining of the strip mine, thereby avoiding the secondary hazard caused by the traditional explosive blasting, and simultaneously, the controllable shock wave technology replaces the deep hole pre-cracking blasting technology in the fracturing of unconventional oil and gas reservoirs, and the like, thereby eliminating the hazard caused by high risk and uncontrollable pressure.
4. Environmental protection and low cost. The invention adopts the gas fracturing technology, avoids the problem of water resource waste in the hydraulic fracturing technology and also avoids the problem of stratum pollution caused by fracturing fluid.
In conclusion, the controllable shock wave and gas fracturing combined fracturing yield increasing device and method have the advantages of good fracturing and rock breaking effects, controllable pressure, good safety, environmental protection and low cost, and are suitable for fracturing yield increasing in open pit mining and unconventional oil and gas reservoir fracturing.
Drawings
FIG. 1 is a schematic diagram of a controllable shock wave and gas fracturing combined fracturing stimulation device (when a secondary serial structure is adopted in a fracturing chamber);
FIG. 2 is an enlarged view of section I of FIG. 1;
FIG. 3 is an enlarged view of section II of FIG. 1;
in the figure, 1-gas injection pipe, 2-air compressor, 3-fracturing chamber, 4-shock wave generator, 5-packer, 6-drilling, 7-fracturing hole, 8-top plug, 9-bottom plug, 10-first pressure sensor, 11-first booster pump, 12-second pressure sensor, 13-first flow sensor, 14-second booster pump, 15-third pressure sensor, 16-second flow sensor, 17-gas storage tank, 18-fourth pressure sensor, 19-third flow sensor, 20-pressure reducing valve, 21-exhaust gas storage tank, 22-fifth pressure sensor, 23-annular bearing base, 24-gas injection center column, 25-annular packing airbag, 26-high pressure closing nozzle, 27-thrust spring, 28-nozzle sealing plate, 29-insulating shell, 30-energetic materials, 31-metal wires, 32-high-voltage electrodes, 33-low-voltage electrodes, 34-top insulation support plates, 35-bottom insulation support plates, 36-vent holes, 37-high-voltage direct-current power supply, 38-energy storage capacitors, 39-control switches, 40-high-voltage cable connectors, 41-high-voltage cables, 42-sixth pressure sensors, 43-sensor signal conversion connectors, V1-first valves, V2-second valves, V3-third valves, V4-fourth valves, V5-fifth valves, V6-sixth valves, V7-seventh valves, V8-eighth valves, V9-ninth valves, V10-tenth valves, V11-eleventh valves, T1-first tee, T2-second tee, T3-third tee, T4-fourth valves.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
As shown in fig. 1-3, the controllable shock wave and gas fracturing combined fracturing yield increasing device comprises an air injection pipe 1, an air compressor 2, a fracturing chamber 3, a shock wave generator 4 and a packer 5; the air compressor 2 is positioned outside the drilling hole 6, and the fracturing chamber 3 is positioned inside the drilling hole 6; a fracturing hole 7 is formed in the side wall of the fracturing chamber 3, and the inner cavity of the fracturing chamber 3 is communicated with the drilling hole 6 through the fracturing hole 7; the shock wave generator 4 is arranged inside the fracturing chamber 3 at the position of the fracturing hole 7; the packer 5 is arranged in an annular space between the fracturing chamber 3 on the upper side and the lower side of the fracturing hole 7 and the inner hole wall of the drilling hole 6; the air compressor 2 is communicated with one end of the air injection pipe 1, the other end of the air injection pipe 1 is output in two paths, the first path is communicated with the inner cavity of the fracturing chamber 3, and the second path is communicated with the packer 5.
The fracturing chamber 3 can adopt a single-stage structure or a multistage series structure; when the fracturing chamber 3 adopts a single-stage structure, cylinder openings at the upper end and the lower end of the fracturing chamber 3 are respectively plugged through a top plug 8 and a bottom plug 9; when the fracturing chambers 3 adopt a multistage series structure, the upper end cylinder ports of the upper first-stage fracturing chambers 3 are plugged through the top plugs 8, the adjacent fracturing chambers 3 are connected in series in a threaded manner, and the lower end cylinder ports of the lower first-stage fracturing chambers 3 are plugged through the bottom plugs 9.
A first pressure sensor 10, a first valve V1, a first booster pump 11, a second pressure sensor 12, a first flow sensor 13, a first tee T1, a second valve V2, a second booster pump 14, a third pressure sensor 15, a second flow sensor 16, a third valve V3, an air storage tank 17, a fourth pressure sensor 18, a third flow sensor 19, a fourth valve V4, a four-way T4 and a fifth valve V5 are sequentially arranged on the air injection pipe 1 between the air compressor 2 and the fracturing chamber 3; the air compressor 2 is communicated with the packer 5 through a first tee T1, a sixth valve V6, a pressure reducing valve 20, a seventh valve V7, a second tee T2 and a third tee T3 are sequentially arranged on the air injection pipe 1 between the first tee T1 and the packer 5, the third tee T3 is communicated with the packer 5 in two ways, an eighth valve V8 is arranged on a first pipeline of the third tee T3 and the packer 5, and a ninth valve V9 is arranged on a second pipeline of the third tee T3 and the packer 5; the second tee T2 is communicated with the four-way T4, and a tenth valve V10 is arranged on a pipeline between the second tee T2 and the four-way T4; an exhaust gas storage tank 21 is arranged outside the drilling hole 6, the exhaust gas storage tank 21 is communicated with a four-way joint T4, and an eleventh valve V11 and a fifth pressure sensor 22 are sequentially arranged on a pipeline between the four-way joint T4 and the exhaust gas storage tank 21.
The packer 5 comprises a circumferential bearing base 23, a gas injection central pipe column 24, a circumferential packing air bag 25 and a high-pressure closed spray head 26; the annular bearing base 23 is fixedly sleeved outside the fracturing chamber 3, the gas injection central pipe column 24 is fixedly inserted in the annular bearing base 23, and the gas injection central pipe column 24 is communicated with the gas injection pipe 1; the annular packing air bag 25 is sleeved on the circumferential outer side of the annular bearing base 23, and the annular packing air bag 25 is communicated with the gas injection pipe 1 through a high-pressure closed spray head 26; a thrust spring 27 is coaxially arranged inside the central hole of the high-pressure closed nozzle 26, one end of the thrust spring 27 is connected with the high-pressure closed nozzle 26, and the other end of the thrust spring 27 is connected with a nozzle sealing plate 28.
The shock wave generator 4 comprises an insulating shell 29, an energetic material 30, a metal wire 31, a high-voltage electrode 32, a low-voltage electrode 33, a top insulating support plate 34 and a bottom insulating support plate 35; the top insulating support plate 34 is fixedly arranged on the side wall of the inner cavity of the fracturing chamber 3 above the fracturing hole 7, the bottom insulating support plate 35 is fixedly arranged on the side wall of the inner cavity of the fracturing chamber 3 below the fracturing hole 7, vent holes 36 are formed in the top insulating support plate 34 and the bottom insulating support plate 35, and the inner cavity of the fracturing chamber 3 is communicated with the fracturing hole 7 through the vent holes 36; the insulating housing 29 is fixedly arranged between the top insulating support plate 34 and the bottom insulating support plate 35, the high-voltage electrode 32 is positioned between the insulating housing 29 and the top insulating support plate 34, the low-voltage electrode 33 is positioned between the insulating housing 29 and the bottom insulating support plate 35, the metal wire 31 is positioned inside the insulating housing 29, one end of the metal wire 31 penetrates through the top cover of the insulating housing 29 to be connected with the high-voltage electrode 32, and the other end of the metal wire 31 penetrates through the bottom plate of the insulating housing 29 to be connected with the low-voltage electrode 33; the energetic material 30 is filled in the inner cavity of the insulating housing 29; the outside of the drill hole 6 is respectively provided with a high-voltage direct-current power supply 37, an energy storage capacitor 38 and a control switch 39, a high-voltage cable connector 40 is arranged on the upper portion of the barrel wall of the fracturing chamber 3, and the high-voltage direct-current power supply 37, the energy storage capacitor 38, the control switch 39, the high-voltage cable connector 40 and the high-voltage electrode 32 are electrically connected through a high-voltage cable 41 in sequence.
A sixth pressure sensor 42 is arranged on the wall of the fracturing chamber 3 between the packers 5 on the upper side and the lower side of the fracturing hole 7, and a sensor signal adapter 43 is arranged on the upper part of the wall of the fracturing chamber 3; the outside of the drilling 6 is provided with an information collector and a computer, signal output ends of the first pressure sensor 10, the second pressure sensor 12, the third pressure sensor 15, the fourth pressure sensor 18, the fifth pressure sensor 22, the first flow sensor 13, the second flow sensor 16 and the third flow sensor 19 are all electrically connected with the information collector, and a signal output end of the sixth pressure sensor 42 is electrically connected with the information collector through a sensor signal adapter 43, and a signal output end of the information collector is electrically connected with the computer.
The method for producing the yield by combining the controllable shock wave and the gas fracturing comprises the following steps of:
step one: determining hole distribution positions and hole distribution quantity of the drill holes 6 according to the open pit mining requirements or the oil and gas reservoir fracturing requirements;
step two: drilling holes 6 by using drilling equipment at the determined hole distribution positions until the drilling holes 6 reach a preset depth;
step three: feeding a fracturing chamber 3 equipped with a shock wave generator 4 and a packer 5 into a borehole 6;
step four: the first valve V1, the sixth valve V6, the seventh valve V7, the eighth valve V8 and the ninth valve V9 are adjusted to be in an open state, the rest valves are kept in a closed state, the air compressor 2 is started at the same time, compressed air firstly passes through the first booster pump 11 to be pressurized and then flows through the pressure reducing valve 20 to enter the gas injection center pipe column 24, compressed air regulated by the pressure reducing valve 20 flows out of the gas injection center pipe column 24 and directly enters the annular packing air bags 25, the nozzle sealing plate 28 is in an open state at the moment, the compressed air can smoothly pass through the high-pressure closing spray heads 26 to gradually inflate and expand the annular packing air bags 25 until the inflated annular packing air bags 25 are closely adhered to the inner hole wall of the drilling holes 6, the pressure inside the high-pressure closing spray heads 26 gradually rises along with the continuous injection of the compressed air, when the pressure exceeds the spring force of the thrust spring 27, the pressure at the moment, the nozzle sealing plate 28 is closed, the high-pressure closing spray heads 26 are closed, the annular space of the drilling holes 6 on the upper side and the lower side of the annular packing air bags 25 is completely sealed, and annular packing space is formed, and all the annular packing air bags 11 are simultaneously closed, and all the valves are closed at the same time, and all the booster pumps 2 are closed;
step five: the first valve V1, the sixth valve V6, the seventh valve V7, the tenth valve V10 and the fifth valve V5 are adjusted to be in an open state, the other valves are maintained in a closed state, the air compressor 2 is started at the same time, compressed air is firstly pressurized by the first booster pump 11 and then flows through the pressure reducing valve 20 to be regulated, the compressed air regulated by the pressure reducing valve 20 sequentially enters the annular packing section of the drilling hole 6 through the inner cavity of the fracturing chamber 3, the vent hole 36 and the fracturing hole 7, the pressure in the annular packing section is detected in real time by the sixth pressure sensor 42, after the pressure in the annular packing section reaches a set value, all the opened valves are closed, and the air compressor 2 and the first booster pump 11 are closed at the same time;
step six: the high-voltage direct-current power supply 37 is started to charge the energy storage capacitor 38, after the electric quantity stored in the energy storage capacitor 38 reaches a set value, the control switch 39 is turned on, the pulse high-voltage high-current generated by the energy storage capacitor 38 is loaded on the high-voltage electrode 32 through the high-voltage cable 41 and the high-voltage cable connector 40, then the high-voltage electrode 33 is discharged through the metal wire 31, a large amount of energy is deposited instantaneously after the metal wire 31 is loaded with the pulse high-voltage high-current, the metal wire 31 is further caused to generate phase change to expand rapidly, composite plasma is generated while strong shock waves are generated, the composite plasma drives the energetic material 30 to generate controllable shock waves, and the controllable shock waves repeatedly act on a mineral body or a reservoir rock body through the fracturing holes 7; specifically, the energy storage capacitor 38 can be charged repeatedly, the repetition frequency is determined directly by the control switch 39, and the control switch 39 can be started by a trigger, so that the energy storage capacitor has the rapid switching capability and the stable continuous working capability;
step seven: the first valve V1, the second valve V2, the third valve V3, the fourth valve V4 and the fifth valve V5 are adjusted to be in an open state, the other valves are kept in a closed state, meanwhile, the air compressor 2 is started, compressed air is subjected to primary pressurization through the first booster pump 11, then is subjected to secondary pressurization through the second booster pump 14, the compressed air after the secondary pressurization directly enters the air storage tank 17 for storage, then high-pressure gas output by the air storage tank 17 enters a circumferential packing section of the drill hole 6 through the inner cavity of the fracturing chamber 3, the vent hole 36 and the fracturing hole 7 in sequence, and further a mineral body or a reservoir rock body is fractured to expand cracks; specifically, the purpose of the secondary pressurization of the compressed air is to gradually increase the pressure, so that the gas injection flow is better ensured, and a better fracturing effect is achieved;
step eight: maintaining the opening state of the fifth valve V5, closing all other opened valves, simultaneously closing the air compressor 2, the first booster pump 11 and the second booster pump 14, then opening the eleventh valve V11, recovering the waste gas through the waste gas storage tank 21 and realizing pressure relief, and finally closing the fifth valve V5 and the eleventh valve V11;
step nine: the eighth valve V8, the ninth valve V9, the tenth valve V10 and the eleventh valve V11 are adjusted to be in an opened state, the pressure in the high-pressure closed spray nozzle 26 is instantaneously reduced, the thrust spring 27 is restored to an extended state from a compressed state, at this time, the spout sealing plate 28 is restored to an opened state from a closed state, the annular sealing air bag 25 is gradually retracted and exhausted, the exhausted gas is recovered through the exhaust gas storage tank 21, and after the annular sealing air bag 25 is retracted to an initial volume, the deblocking is completed.
The embodiments are not intended to limit the scope of the invention, but rather are intended to cover all equivalent implementations or modifications that can be made without departing from the scope of the invention.
Claims (3)
1. A controllable shock wave and gas fracturing combined fracturing yield increasing device is characterized in that: comprises an air injection pipe, an air compressor, a fracturing chamber, a shock wave generator and a packer; the air compressor is positioned outside the drilling hole, and the fracturing chamber is positioned inside the drilling hole; a fracturing hole is formed in the side wall of the fracturing chamber, and the cavity in the fracturing chamber is communicated with the drill hole through the fracturing hole; the shock wave generator is arranged in the fracturing chamber at the position of the fracturing hole; the packer is arranged in an annular space between the fracturing chambers on the upper side and the lower side of the fracturing hole and the inner hole wall of the drilling hole; the air compressor is communicated with one end of the air injection pipe, the other end of the air injection pipe is output in two paths, the first path is communicated with the inner cavity of the fracturing chamber, and the second path is communicated with the packer;
the fracturing chamber can adopt a single-stage structure or a multistage series structure; when the fracturing chamber adopts a single-stage structure, cylinder openings at the upper end and the lower end of the fracturing chamber are respectively plugged through a top plug and a bottom plug; when the fracturing chambers adopt a multi-stage serial structure, the upper end cylinder ports of the upper first-stage fracturing chambers are plugged through top plugs, adjacent fracturing chambers are connected in series in a threaded manner, and the lower end cylinder ports of the lower first-stage fracturing chambers are plugged through bottom plugs;
a first pressure sensor, a first valve, a first booster pump, a second pressure sensor, a first flow sensor, a first tee joint, a second valve, a second booster pump, a third pressure sensor, a second flow sensor, a third valve, an air storage tank, a fourth pressure sensor, a third flow sensor, a fourth valve, a four-way valve and a fifth valve are sequentially arranged on an air injection pipe between the air compressor and the fracturing chamber; the air compressor is communicated with the packer through a first tee joint, a sixth valve, a pressure reducing valve, a seventh valve, a second tee joint and a third tee joint are sequentially arranged on an air injection pipe between the first tee joint and the packer, the third tee joint is communicated with the packer in two ways, an eighth valve is arranged on a first pipeline of the third tee joint and the packer, and a ninth valve is arranged on a second pipeline of the third tee joint and the packer; the second tee joint is communicated with the four-way joint, and a tenth valve is arranged on a pipeline between the second tee joint and the four-way joint; an exhaust gas storage tank is arranged outside the drill hole, the exhaust gas storage tank is communicated with the four-way joint, and an eleventh valve and a fifth pressure sensor are sequentially arranged on a pipeline between the four-way joint and the exhaust gas storage tank;
the packer comprises a circumferential bearing base, an air injection central pipe column, a circumferential packing air bag and a high-pressure closed spray head; the annular bearing base is fixedly sleeved outside the fracturing chamber, the gas injection central pipe column is fixedly inserted in the annular bearing base, and the gas injection central pipe column is communicated with the gas injection pipe; the annular packing air bag is sleeved on the circumferential outer side of the annular bearing base, and the annular packing air bag is communicated with the air injection pipe through a high-pressure closed spray head; a thrust spring is coaxially arranged at the inner side of the central orifice of the high-pressure closed spray head, one end of the thrust spring is connected with the high-pressure closed spray head, and the other end of the thrust spring is connected with a nozzle sealing plate;
the shock wave generator comprises an insulating shell, an energetic material, a metal wire, a high-voltage electrode, a low-voltage electrode, a top insulating support plate and a bottom insulating support plate; the top insulating support plate is fixedly arranged on the side wall of the fracturing chamber above the fracturing hole, the bottom insulating support plate is fixedly arranged on the side wall of the fracturing chamber below the fracturing hole, vent holes are formed in the top insulating support plate and the bottom insulating support plate, and the fracturing chamber is communicated with the fracturing hole through the vent holes; the insulation shell is fixedly arranged between the top insulation support plate and the bottom insulation support plate, the high-voltage electrode is arranged between the insulation shell and the top insulation support plate, the low-voltage electrode is arranged between the insulation shell and the bottom insulation support plate, the metal wire is arranged in the insulation shell, one end of the metal wire penetrates through the top cover of the insulation shell to be connected with the high-voltage electrode, and the other end of the metal wire penetrates through the bottom plate of the insulation shell to be connected with the high-voltage electrode; the energy-containing material is filled in the inner cavity of the insulating shell; the outside of the drilling is respectively provided with a high-voltage direct-current power supply, an energy storage capacitor and a control switch, the upper part of the wall of the fracturing chamber is provided with a high-voltage cable connector, and the high-voltage direct-current power supply, the energy storage capacitor, the control switch, the high-voltage cable connector and the high-voltage electrode are electrically connected through a high-voltage cable in sequence.
2. The controllable shock wave and gas fracturing combined fracturing stimulation device according to claim 1, wherein: a sixth pressure sensor is arranged on the wall of the fracturing chamber between the packers at the upper side and the lower side of the fracturing hole, and a sensor signal adapter is arranged at the upper part of the wall of the fracturing chamber; the outside of drilling is provided with information acquisition ware and computer, first pressure sensor, second pressure sensor, third pressure sensor, fourth pressure sensor, fifth pressure sensor, first flow sensor, second flow sensor and third flow sensor's signal output part all carries out the electricity with information acquisition ware and is connected, the signal output part of sixth pressure sensor carries out the electricity with information acquisition ware through sensor signal adapter and is connected, and information acquisition ware's signal output part carries out the electricity with the computer and is connected.
3. A method for producing yield by combining controllable shock wave and gas fracturing, which adopts the device for producing yield by combining controllable shock wave and gas fracturing according to claim 1, and is characterized by comprising the following steps:
step one: determining hole distribution positions and hole distribution quantity of drilled holes according to the mining requirements of the strip mine or the fracturing requirements of the oil and gas reservoir;
step two: drilling holes at the determined hole distribution positions by using drilling equipment until the drilling holes reach a preset depth;
step three: sending a fracturing chamber equipped with a shock wave generator and a packer into a borehole;
step four: the method comprises the steps that a first valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve are adjusted to be in an open state, the rest valves are kept in a closed state, an air compressor is started at the same time, compressed air is pressurized through a first booster pump, then flows through a pressure reducing valve and enters an air injection central pipe column, compressed air regulated by the pressure reducing valve flows out of the air injection central pipe column and directly enters an annular sealing air bag, a spout sealing plate is in an open state at the moment, the compressed air can smoothly pass through a high-pressure closed spray nozzle to enable the annular sealing air bag to be inflated gradually until the inflated annular sealing air bag is tightly adhered to the inner wall of a drilling hole, the pressure in the high-pressure closed spray nozzle gradually rises along with continuous injection of the compressed air, when the pressure exceeds the spring force of a thrust spring, the pressure is enabled to enable a spout sealing plate to be closed at the moment, the annular sealing air bag is inflated, annular sealing of the drilling holes on the upper side and the lower side of a fracturing hole is completed, an annular sealing section is formed, then all the valves are closed rapidly, and the air compressor and the first booster pump is closed;
step five: the method comprises the steps of adjusting a first valve, a sixth valve, a seventh valve, a tenth valve and a fifth valve to an open state, keeping other valves in a closed state, starting an air compressor, pressurizing compressed air through a first booster pump, then regulating pressure through a pressure reducing valve, enabling the compressed air regulated by the pressure reducing valve to enter a circumferential packing section of a drill hole sequentially through an inner cavity of a fracturing chamber, a vent hole and a fracturing hole, detecting the pressure in the circumferential packing section in real time by a sixth pressure sensor, closing all the opened valves after the pressure in the circumferential packing section reaches a set value, and closing the air compressor and the first booster pump;
step six: starting a high-voltage direct-current power supply to charge an energy storage capacitor, when the electric quantity stored in the energy storage capacitor reaches a set value, switching on a control switch, loading pulse high-voltage high current generated by the energy storage capacitor onto a high-voltage electrode through a high-voltage cable and a high-voltage cable connector, discharging the high-voltage electrode through a metal wire, instantly depositing a large amount of energy after the pulse high-voltage high current is loaded onto the metal wire, further enabling the metal wire to generate phase change so as to expand rapidly, generating strong shock waves, generating composite plasmas at the same time, and driving an energy-containing material to generate controllable shock waves, wherein the controllable shock waves repeatedly act on a mineral body or a reservoir rock body through a fracturing hole;
step seven: the method comprises the steps of adjusting a first valve, a second valve, a third valve, a fourth valve and a fifth valve to be in an open state, keeping other valves in a closed state, starting an air compressor, carrying out primary pressurization on compressed air through a first booster pump, carrying out secondary pressurization through a second booster pump, directly entering a gas storage tank for storage after the secondary pressurization of the compressed air, outputting high-pressure gas through the gas storage tank, and enabling the high-pressure gas to enter a circumferential packing section of a drill hole through an inner cavity of a fracturing chamber, a vent hole and a fracturing hole in sequence, so as to further fracture a mineral body or a reservoir rock body to expand cracks;
step eight: maintaining the opening state of the fifth valve, closing all other opened valves, simultaneously closing the air compressor, the first booster pump and the second booster pump, then opening an eleventh valve, recovering waste gas through the waste gas storage tank, realizing pressure relief, and finally closing the fifth valve and the eleventh valve;
step nine: the eighth valve, the ninth valve, the tenth valve and the eleventh valve are adjusted to be in an opening state, the pressure in the high-pressure closed spray nozzle is instantaneously reduced, the thrust spring is restored to an extension state from a compression state, at the moment, the spout sealing plate is restored to the opening state from the closing state, the annular sealing air bag is gradually retracted and exhausted, the exhausted gas is recovered through the waste gas storage tank, and after the annular sealing air bag is retracted to an initial volume, the deblocking is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042891.7A CN112727427B (en) | 2021-01-13 | 2021-01-13 | Controllable shock wave and gas fracturing combined fracturing yield increasing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042891.7A CN112727427B (en) | 2021-01-13 | 2021-01-13 | Controllable shock wave and gas fracturing combined fracturing yield increasing device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112727427A CN112727427A (en) | 2021-04-30 |
| CN112727427B true CN112727427B (en) | 2024-03-01 |
Family
ID=75592961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110042891.7A Active CN112727427B (en) | 2021-01-13 | 2021-01-13 | Controllable shock wave and gas fracturing combined fracturing yield increasing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112727427B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961646B (en) * | 2022-04-27 | 2024-01-23 | 常州大学 | Surface discharge type plasma shock wave dredging device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5005649A (en) * | 1990-02-28 | 1991-04-09 | Union Oil Company Of California | Multiple fracture production device and method |
| CN102691494A (en) * | 2012-06-08 | 2012-09-26 | 四川大学 | Pneumatic embrittlement method and equipment for shale gas exploitation |
| CN105674818A (en) * | 2016-02-03 | 2016-06-15 | 西安贯通能源科技有限公司 | Method driving energetic electrode to release energy and produce shock waves by high-voltage discharge |
| CN110195580A (en) * | 2019-05-27 | 2019-09-03 | 煤科集团沈阳研究院有限公司 | A kind of gas-liquid two-phase synergy coal seam anti-reflection method |
| CN110344806A (en) * | 2018-04-02 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of slim-hole explosion seam auxiliary hydraulic fracturing method |
| CN110847889A (en) * | 2019-11-20 | 2020-02-28 | 河南工程学院 | Hydraulic fracturing test system and test method |
| CN214532926U (en) * | 2021-01-13 | 2021-10-29 | 东北大学 | Controllable shock wave and gas fracturing combined fracturing yield increasing device |
-
2021
- 2021-01-13 CN CN202110042891.7A patent/CN112727427B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5005649A (en) * | 1990-02-28 | 1991-04-09 | Union Oil Company Of California | Multiple fracture production device and method |
| CN102691494A (en) * | 2012-06-08 | 2012-09-26 | 四川大学 | Pneumatic embrittlement method and equipment for shale gas exploitation |
| CN105674818A (en) * | 2016-02-03 | 2016-06-15 | 西安贯通能源科技有限公司 | Method driving energetic electrode to release energy and produce shock waves by high-voltage discharge |
| CN110344806A (en) * | 2018-04-02 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of slim-hole explosion seam auxiliary hydraulic fracturing method |
| CN110195580A (en) * | 2019-05-27 | 2019-09-03 | 煤科集团沈阳研究院有限公司 | A kind of gas-liquid two-phase synergy coal seam anti-reflection method |
| CN110847889A (en) * | 2019-11-20 | 2020-02-28 | 河南工程学院 | Hydraulic fracturing test system and test method |
| CN214532926U (en) * | 2021-01-13 | 2021-10-29 | 东北大学 | Controllable shock wave and gas fracturing combined fracturing yield increasing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112727427A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109162755B (en) | Rock cross-cut coal uncovering method combining electric pulse and grouting reinforcement | |
| WO2016165396A1 (en) | Downhole coal seam pulse detonation wave directional fracturing permeability-increasing method | |
| CN111396049B (en) | Safe and environment-friendly rock blasting device and method | |
| CN108397182A (en) | Electric pulse cooperates with the device and method in the anti-reflection coal seam of frozen-thawed | |
| CN112145144B (en) | Based on multistage liquid CO2Phase-change composite fracturing transformation system and method | |
| CN103148748B (en) | Bearing pressure adjustable plastic expansion pipe deep hole blasting control method | |
| CN112727427B (en) | Controllable shock wave and gas fracturing combined fracturing yield increasing device and method | |
| CN109138956A (en) | A kind of electric pulse hydraulic fracture integrated apparatus | |
| CN112665472B (en) | Carbon dioxide rock breaking device and method for open-pit mine | |
| CN111608631A (en) | Supercritical CO excitation based on electric pulse2Device for fracturing coal seam and application method | |
| CN214532926U (en) | Controllable shock wave and gas fracturing combined fracturing yield increasing device | |
| CN202393307U (en) | Radial air-separated charging device for hole blasting | |
| CN109209328A (en) | A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus | |
| CN112762781B (en) | Rock breaking device and method under combined action of transient static gas fracturing for open-pit mine | |
| CN110439520B (en) | Intrinsic safety type dry ice powder static pneumatic fracturing simulation device and application method thereof | |
| CN112943210A (en) | Electric pulse and ultrasonic wave cooperated coalbed methane enhanced mining method | |
| CN214537620U (en) | Carbon dioxide rock breaking device for open pit mine | |
| CN208168859U (en) | The device in the electric pulse collaboration anti-reflection coal seam of frozen-thawed | |
| CN113409670B (en) | Pipeline shield construction device for simulating deep sea environment | |
| CN110670902A (en) | Electric pulse impact rod and electric pulse shock wave cracking structure | |
| CN113790080B (en) | Low-permeability and difficult-desorption coal seam blasting and gas injection combined enhanced gas extraction device and method | |
| CN109870083A (en) | A kind of method of coal and rock orientation long range anatonosis | |
| CN115522905A (en) | Methane explosion fracturing device for shale gas reservoir and control method thereof | |
| CN111456732B (en) | Coal seam top coal pre-splitting method | |
| CN115234237A (en) | Device for fracturing hard rock mass by underground electric pulse based on liquid-electricity effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |