CN115822543A

CN115822543A - Coal seam ultrasonic activation staged fracturing device and method

Info

Publication number: CN115822543A
Application number: CN202310027260.7A
Authority: CN
Inventors: 韦波; 胡永; 姜维; 胡振鹏; 仲劼; 刘蒙蒙; 赵琛
Original assignee: No 156 Coalfield Geological Exploring Group Of Xinjiang Uygur Autonomous Region Coalfield Geology Bureau
Current assignee: No 156 Coalfield Geological Exploring Group Of Xinjiang Uygur Autonomous Region Coalfield Geology Bureau
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-03-21

Abstract

The invention discloses a coal seam ultrasonic activation staged fracturing device and a coal seam ultrasonic activation staged fracturing method, and relates to the field of coal seam ultrasonic activation staged fracturing. According to the coal seam fracturing device, the drill bit used for drilling in the coal seam is arranged at the end part of the drill rod, so that the drill rod conveniently extends into the coal seam, when the drill rod extends into the coal seam, the pipeline is utilized to pressurize the fracturing mechanism, the coal seam is fractured after pressure is transmitted to the coal seam, when the coal seam is fractured, ultrasonic waves generated by the ultrasonic activation mechanism also act in the coal seam, so that the coal seam becomes loose, the drill rod can extend into the coal seam to drill on the basis of the pipeline connected to the end part of the drill rod, so that the drilling depth is increased, the drilling direction of the drill bit can be adjusted by the adjusting mechanism, the position of the drill rod in the coal seam is conveniently controlled, and the construction cost is reduced.

Description

Coal seam ultrasonic activation staged fracturing device and method

Technical Field

The invention relates to the field of ultrasonic activation staged fracturing of coal beds, in particular to an ultrasonic activation staged fracturing device and method for a coal bed.

Background

Coal bed gas is also called coal bed gas, is disaster-causing gas causing coal mine gas disasters, and is clean energy which exists in coal beds and accompanies coal together. Along with the increase of the mining depth year by year, the gas pressure of the coal seam is continuously increased, the ground stress condition is increasingly complex, the gas permeability of the coal seam is continuously reduced, the gas is difficult to desorb in the extraction process, and the normal continuous production and the personnel safety of the coal mine are seriously influenced. In order to improve the gas extraction effect, the gas permeability (permeability increase) of a coal seam needs to be improved, and the underground coal mine staged fracturing technology based on directional long drilling is gradually adopted. The long-drill-hole staged fracturing technology has high requirement on the hardness of a coal seam, and the phenomena of hole collapse, drill embracing and the like can occur in the long drill hole during soft coal construction, so that staged fracturing cannot be realized. For soft coal, generally, top and bottom plate long drilling is adopted for staged fracturing, so that cracks generated by hard rock extend to a coal seam, and a channel is provided for gas movement. However, when the drill hole is constructed in the rock stratum, the layer position of the drill hole can directly influence the extension effect of the fracturing fracture, and the fracture can not extend into the coal bed, so that the fracturing effect is reduced.

Chinese patent: a coal seam ultrasonic activation staged fracturing device (the patent application number is CN 202210282249.0) discloses a coal seam ultrasonic activation staged fracturing device, which comprises: one end of the pipe fitting, which extends into the coal seam drilling hole, of one part of the pipe fitting, is connected with at least two pitching sliding sleeves in series; the pitching sliding sleeve is provided with a first liquid passing channel, a second liquid passing channel, an ultrasonic vibrator and a power supply, and the pitching sliding sleeve is in an original state and a matched state; each ball-throwing sliding sleeve is provided with a fracturing ball, and the fracturing ball enters the matched ball-throwing sliding sleeve to block the first liquid passing channel; the pitching sliding sleeve is provided with a limiting piece which limits the pitching sliding sleeve in an original state, after the first liquid passing channel is blocked, the limiting piece fails, and the pitching sliding sleeve is switched from the original state to a matching state; when the pitching sliding sleeve is in an original state, the first liquid passing channel is used for flowing fracturing liquid and allowing a fracturing ball matched with the downstream pitching sliding sleeve to pass through; when the pitching sliding sleeve is in a matching state, the second liquid passing channel is used for flowing fracturing liquid.

But the working process comprises the steps of drilling a coal seam, charging a battery, sealing holes, fracturing, ultrasonic vibration and accelerating chemical reaction by a thermal effect to generate a sodium carbonate solution, oxygen and water, and a large amount of generated bubbles enter the coal seam drilling holes along with the fracturing fluid under the action of water pressure and are subjected to synergistic fracturing under the action of ultrasonic cavitation. But the whole process takes a long time.

And the battery needs to be charged every time, and the coal bed needs to be drilled and sealed in advance every time. The construction period is long and the cost is high.

Therefore, it is necessary to provide a coal seam ultrasonic activation staged fracturing device and method to solve the above problems.

Disclosure of Invention

The invention aims to provide a coal seam ultrasonic activation staged fracturing device and a coal seam ultrasonic activation staged fracturing method, which are used for solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a coal seam ultrasonic activation staged fracturing device, includes the drilling rod, the drilling rod is cylindric structure, is provided with drill bit, fracturing mechanism, adjustment mechanism, ultrasonic activation mechanism and pipeline on the drilling rod, the drill bit sets up in the tip of drilling rod, and the drill bit is arranged in creeps into in the coal seam, fracturing mechanism is used for making the coal seam by the fracturing for the coal seam pressurization, and ultrasonic activation mechanism is used for producing the ultrasonic wave, and the ultrasonic wave is assisted the coal seam by the fracturing, and fracturing mechanism and ultrasonic activation mechanism all set up in the middle part of drilling rod, adjustment mechanism is provided with two sets ofly, and two sets of adjustment mechanism set up respectively in the tip of drilling rod, and adjustment mechanism is used for adjusting the direction that the drill bit crept into in the coal seam, the pipeline sets up in the inside of drilling rod, and the terminal surface that the drill bit was kept away from to the one end activity of pipeline is stretched out the drilling rod.

Preferably, the drilling rod is close to the inside baffle that is provided with of one end of drill bit, the baffle is with inside keeping apart into the accessory chamber that is close to the drill bit and the main cavity of keeping away from the drill bit of drilling rod, be provided with the motor in the accessory chamber, the end transmission of motor is connected with motor shaft, the drilling rod terminal surface is stretched out in the motor shaft activity, and motor shaft activity stretches out fixed connection between the position of drilling rod tip and the drill bit, still install GPS location chip in the accessory chamber.

According to the invention, the drill bit for drilling in the coal bed is arranged at the end part of the drill rod, so that the drill rod conveniently extends into the coal bed, when the drill rod extends into the coal bed, the pipeline is utilized to pressurize the fracturing mechanism, the coal bed is fractured after pressure is transmitted to the coal bed, when the coal bed is fractured, ultrasonic waves generated by the ultrasonic activation mechanism also act in the coal bed, so that the coal bed becomes loose, the drill rod can extend into the coal bed to drill on the basis of the pipeline connected to the end part of the drill rod, so that the drilling depth is increased, the drilling direction of the drill bit can be adjusted by the adjusting mechanism, the position of the drill rod in the coal bed is convenient to control, and the mode that the drill rod can only extend into the coal bed to a certain depth to perform ultrasonic activation staged fracturing on the coal bed in the prior art is replaced.

When the motor is started, the motor drives the drill bit to rotate, the drill bit drills in the coal seam, the drill rod extends into the coal seam while the drill bit drills in the coal seam, after the drill rod reaches a proper position in the coal seam, a medium is filled into the pipeline to be pressurized, the seventh electromagnetic valve is opened, the medium enters the pressure cavity through the connecting pipeline, after the medium in the pressure cavity reaches a certain pressure, the elastic anti-explosion metal sheet is broken from the position of the cross hole under the limit pressure, the medium is quickly pressed into the coal seam from the release hole, and the purpose that the coal seam is fractured is achieved.

Preferably, a wire is arranged in the pipeline, and one end of the wire is connected with the motor.

The wire is used for connecting the power supply and supplying power to the motor, and an insulating layer is arranged outside the wire.

Preferably, the fracturing mechanism includes pressure tank, pressure chamber, relief hole and elasticity explosion-proof sheetmetal, the pressure tank is fixed to be set up on the drilling rod inner wall, the pressure chamber is located between pressure tank inner wall and the drilling rod inner wall, the relief hole sets up in drilling rod outer lane department, between relief hole intercommunication drilling rod outside and the pressure chamber, elasticity explosion-proof sheetmetal is fixed to be set up in the relief hole, elasticity explosion-proof sheetmetal middle part is provided with the cross hole, communicate through connecting tube between pipeline and the pressure chamber, be provided with the seventh solenoid valve in the connecting tube.

Preferably, the ultrasonic activation mechanism comprises an ultrasonic generator and a shell, the shell is fixedly arranged on the inner wall of the drill rod, the ultrasonic generator is arranged in the shell, and liquid is filled in the shell.

After the coal seam is fractured, the ultrasonic generator is started, and the ultrasonic generator transmits ultrasonic waves to the fractured coal seam, so that the coal seam is further loosened, and the purpose of ultrasonically activating the coal seam is achieved.

Can be based on the drilling rod constantly advances in the coal seam, need not many times location and punch, improve the efficiency of construction, along with the drilling rod constantly advances in the coal seam, can be once fracturing after every a section suitable distance in the coal seam, the practicality is strong.

Preferably, adjustment mechanism includes control box, spring, push pedal, pushes away groove, connecting rod and pressure push pedal, the control box is fixed to be set up on the inner wall of drilling rod, the pressure push pedal slides and sets up inside the control box, fixed connection between the one side of pipeline and the connecting rod is kept away from to the pressure push pedal, the one end activity that the pressure push pedal was kept away from to the connecting rod passes the control box surface, push away the groove and set up in drilling rod outer lane department, push pedal activity sets up in pushing away the groove, the push pedal is close to fixed connection between the one side of control box and the connecting rod tip, the one end fixed welding of spring is close to the one side of connecting rod at the pressure push pedal, and the fixed welding of the other end of spring is on the one side inner wall of pipeline is kept away from to the control box, the pressure push pedal is close to constituteing the pressure accumulation chamber between the one side of pipeline and the control box is inside, the control box is close to the one side fixedly connected with first butt joint pipeline, the outer lane department of pipeline is fixed and is provided with the second butt joint pipeline, first butt joint pipeline and second butt joint pipeline, be provided with the sixth solenoid valve in the second butt joint pipeline intercommunication.

The adjustment drill bit during the direction of advance in the coal seam, can open the sixth solenoid valve that corresponds, make the medium in the pipeline get into the pressure accumulation cavity, the medium promotes the pressure push pedal and removes to the direction of keeping away from the pipeline, thereby make the push pedal stretch out and push away the groove, play the purpose of promoting the conflict in the coal seam inner structure, the push pedal of the different positions in adjustment drilling rod outer lane, thereby the holistic direction of advance of control drill bit, and GPS fixes a position the chip and can be used to monitor the position of drilling rod in the coal seam, and convenient to control, high durability and convenient use.

Preferably, one side of the control box is provided with a first air vent, a fourth electromagnetic valve is arranged in the first air vent, the first air vent is communicated between the pressure accumulation chamber and the outside of the control box, one end, far away from the drill bit, of the drill rod is provided with a second air vent, the second air vent is communicated with the inside and the outside of the drill rod, and a fifth electromagnetic valve is arranged in the second air vent.

In order to enable the push plate to reset, a fourth electromagnetic valve is arranged in the first air release hole, when the fourth electromagnetic valve is opened, the medium in the pressure accumulation chamber can be released into the main chamber, after the pressure of the medium in the pressure accumulation chamber is lost, the spring pushes the pressure push plate to reset, and when the pressure push plate resets, the push plate is pulled by the connecting rod to reset; in order to avoid the medium pressure in the pressure accumulation chamber from being too high, a second air release hole is arranged at the end part of the drill rod, and when the fifth electromagnetic valve is opened, redundant medium in the pressure accumulation chamber can be released.

Preferably, the control box is provided with a plurality of groups along the inner wall of the drill rod, and the plurality of groups of control boxes are distributed at equal angles.

Preferably, one end of the pipeline extending out of the drill rod is connected with a high-pressure pump, the high-pressure pump is respectively connected with a water tank, an oil tank and a gas tank, and the positions of the water tank, the oil tank, the gas tank and the high-pressure pump, which are communicated with each other, are respectively provided with a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve.

The high-pressure pump can convey a medium into the pipeline, the drilling direction of the drill bit is adjusted by the medium, the medium is also used for carrying out ultrasonic activation staged fracturing on the coal bed, and the medium is uniformly dispersed in the coal bed structure after fracturing the coal bed, so that the ultrasonic wave generated by the ultrasonic generator is more favorably transmitted, and the coal bed is loosened.

In the invention, one of three media can be selected according to requirements: water, oil and air;

when selecting water, open first solenoid valve can, the high-pressure pump is with the water suction pipeline of storage in the water pitcher in, and the cost is lower when utilizing water.

When selecting fluid, open the second solenoid valve can, the high-pressure pump with the fluid suction of storage in the oil tank to the pipeline, when utilizing fluid, the filling that fluid can be better stops in the coal seam, promotes subsequent ultrasonic activation.

When selecting the air, open the third solenoid valve can, the high-pressure pump is with the air suction of storage in the gas pitcher to the pipeline in, with low costs, and the diffusivity of air is stronger, more easily with coal seam fracturing.

The invention also discloses an ultrasonic activation staged fracturing method, which comprises the ultrasonic activation staged fracturing device for the coal seam, and further comprises the following steps:

s1: when the motor is started, the motor drives the drill bit to rotate, the drill bit drills in the coal seam, the drill rod extends into the coal seam while the drill bit drills in the coal seam, when the drilling direction of the drill bit in the coal seam is adjusted, the corresponding sixth electromagnetic valve can be opened, a medium in the pipeline enters the pressure accumulation chamber, the medium pushes the pressure push plate to move in the direction away from the pipeline, so that the push plate extends out of the push groove and pushes the push plate to abut against the inner structure of the coal seam, the push plates at different positions of the outer ring of the drill rod are adjusted, the integral drilling direction of the drill bit is controlled, the GPS positioning chip can be used for monitoring the position of the drill rod in the coal seam and is convenient to control, the drill rod can continuously drill in the coal seam as the drill rod continuously advances in the coal seam, and the drill rod can be fractured once after a certain distance in the coal seam;

s2: when the medium in the pressure cavity reaches a certain pressure, the elastic explosion-proof metal sheet is broken from the position of the cross hole under the limit pressure, so that the medium is quickly pressed into the coal seam from the release hole, and the aim of fracturing the coal seam is fulfilled;

s3: ultrasonic activation, the medium is even dispersion in the coal seam structure after with coal seam fracturing, is favorable to the ultrasonic wave transmission in the coal seam that supersonic generator during operation produced more to carry out comprehensive loose activation to the coal seam.

The invention has the technical effects and advantages that:

1. according to the invention, the drill bit for drilling in the coal bed is arranged at the end part of the drill rod, so that the drill rod conveniently extends into the coal bed, when the drill rod extends into the coal bed, the pipeline is utilized to pressurize the fracturing mechanism, the coal bed is fractured after the pressure is transmitted to the coal bed, when the coal bed is fractured, the ultrasonic wave generated by the ultrasonic wave activation mechanism also acts on the coal bed, so that the coal bed becomes loose, the drill rod can extend into the coal bed to drill on the basis of the pipeline connected to the end part of the drill rod, so that the drilling depth is increased, the drilling direction of the drill bit can be adjusted by the adjusting mechanism, the position of the drill rod in the coal bed is convenient to control, the mode that the drill rod can only extend into the coal bed to a certain depth to perform ultrasonic activation staged fracturing on the coal bed in the prior art is replaced, and the construction cost is reduced;

2. after the coal bed is fractured, the ultrasonic generator is started, and the ultrasonic generator transmits ultrasonic waves to the fractured coal bed, so that the coal bed is further loosened, and the purpose of ultrasonically activating the coal bed is achieved;

3. the drilling rod can continuously advance in the coal bed without positioning and punching for multiple times, so that the construction efficiency is improved, the drilling rod can be fractured once every other suitable distance along with continuous advance in the coal bed, and the practicability is high;

4. the high-pressure pump can convey a medium into the pipeline, the drilling direction of the drill bit is adjusted by the medium, the medium is also used for conducting ultrasonic activation staged fracturing on the coal seam, and the medium is uniformly dispersed in the coal seam structure after fracturing the coal seam, so that ultrasonic waves generated by the ultrasonic generator can be transmitted more conveniently, and the coal seam is loosened.

Drawings

FIG. 1 is a schematic structural diagram of an ultrasonic activation staged fracturing device for a coal seam.

Fig. 2 is a schematic structural diagram of the adjusting mechanism of the present invention.

Fig. 3 is a schematic structural diagram of the fracturing mechanism of the present invention.

FIG. 4 is a schematic view of the drill bit of the present invention.

FIG. 5 is an enlarged view of the structure at A in FIG. 2 according to the present invention.

FIG. 6 is an enlarged view of the structure at B in FIG. 3 according to the present invention.

Fig. 7 is a schematic structural view of the elastic explosion-proof metal sheet of the invention.

Fig. 8 is a schematic structural diagram of the ultrasonic activation staged fracturing device for the coal seam.

In the figure: the device comprises a drill rod 1, a drill bit 2, a fracturing mechanism 3, an adjusting mechanism 4, an ultrasonic activation mechanism 5, a pipeline 6, a coal bed 7, a high-pressure pump 8, a water tank 9, an oil tank 10, an air tank 11, a first electromagnetic valve 12, a second electromagnetic valve 13, a third electromagnetic valve 14, a push plate 15, a push groove 16, a spring 17, a connecting rod 18, a pressure push plate 19, a fourth electromagnetic valve 20, a first air release hole 21, a lead wire 22, a second air release hole 23, a fifth electromagnetic valve 24, a pressure cavity 25, a pressure box 26, a release hole 27, a control box 28, a shell 29, an ultrasonic generator 30, a main cavity 31, a motor 32, a GPS positioning chip 33, a secondary cavity 34, a partition plate 35, a motor rotating shaft 36, an accumulation pressure cavity 37, a first connecting pipe 38, a second connecting pipe 39, a sixth electromagnetic valve 40, an elastic anti-explosion metal sheet 41, a cross hole 42, a connecting pipe 43 and a seventh electromagnetic valve 44.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides an ultrasonic activation staged fracturing device for a coal seam, which is shown in figures 1-8 and comprises a drill rod 1, wherein the drill rod 1 is of a cylindrical structure, a drill bit 2, a fracturing mechanism 3, an adjusting mechanism 4, an ultrasonic activation mechanism 5 and a pipeline 6 are arranged on the drill rod 1, the drill bit 2 is arranged at the end part of the drill rod 1, the drill bit 2 is used for drilling in a coal seam 7, the fracturing mechanism 3 is used for pressurizing the coal seam 7 to fracture the coal seam 7, the ultrasonic activation mechanism 5 is used for generating ultrasonic waves to assist the coal seam 7 to be fractured, the fracturing mechanism 3 and the ultrasonic activation mechanism 5 are both arranged in the middle of the drill rod 1, the adjusting mechanisms 4 are respectively arranged at the end parts of the drill rod 1, the adjusting mechanism 4 is used for adjusting the drilling direction of the drill bit 2 in the coal seam 7, the pipeline 6 is arranged in the drill rod 1, and one end of the pipeline 6 movably extends out of the end surface, far away from the drill bit 2, of the drill rod 1.

The inside baffle 35 that is provided with of one end that drilling rod 1 is close to drill bit 2, baffle 35 with inside the isolation of drilling rod 1 become the subchamber 34 that is close to drill bit 2 and keep away from the main cavity 31 of drill bit 2, be provided with motor 32 in the subchamber 34, the end transmission of motor 32 is connected with motor shaft 36, the activity of motor shaft 36 stretches out drilling rod 1 terminal surface, motor shaft 36 activity stretches out fixed connection between the position of drilling rod 1 tip and the drill bit 2, still install GPS location chip 33 in the subchamber 34.

According to the invention, the drill bit 2 for drilling in the coal seam 7 is arranged at the end part of the drill rod 1, so that the drill rod 1 conveniently extends into the coal seam 7, when the drill rod 1 extends into the coal seam 7, the pipeline 6 is utilized to pressurize the fracturing mechanism 3, the coal seam 7 is fractured after the pressure is transmitted to the coal seam 7, when the coal seam 7 is fractured, ultrasonic waves generated by the ultrasonic activation mechanism 5 also act on the coal seam 7, so that the coal seam 7 becomes loose, the drill rod 1 can extend into the coal seam 7 to drill on the basis of the connection of the pipeline 6 at the end part of the drill rod 1, so that the drilling depth is increased, the drilling direction of the drill bit 2 can be adjusted by the adjusting mechanism 4, the position of the drill rod 1 in the coal seam 7 is conveniently controlled, and the mode that the drill rod 1 only can extend into the coal seam 7 to a certain depth to perform ultrasonic activation staged fracturing on the coal seam 7 in the prior art is replaced.

When the motor 32 is started, the motor 32 drives the drill bit 2 to rotate, the drill bit 2 drills in the coal seam 7, the drill rod 1 extends into the coal seam 7 while the drill bit 2 drills in the coal seam 7, after the drill rod 1 reaches a proper position in the coal seam 7, the pipeline 6 is filled with a medium to be pressurized, the seventh electromagnetic valve 44 is opened, the medium enters the pressure cavity 25 through the connecting pipeline 43, and after the medium in the pressure cavity 25 reaches a certain pressure, the elastic anti-explosion metal sheet 41 is broken from the position of the cross hole 42 under the limit pressure, so that the medium is quickly pressed into the coal seam 7 from the release hole 27, and the purpose of fracturing the coal seam 7 is achieved.

A lead wire 22 is arranged in the pipeline 6, and one end of the lead wire 22 is connected with a motor 32.

The wire 22 is used for connecting a power supply and supplying power to the motor 32, and the wire 22 is provided with an insulating layer outside.

The fracturing mechanism 3 comprises a pressure box 26, a pressure chamber 25, a release hole 27 and an elastic anti-explosion metal sheet 41, wherein the pressure box 26 is fixedly arranged on the inner wall of the drill rod 1, the pressure chamber 25 is positioned between the inner wall of the pressure box 26 and the inner wall of the drill rod 1, the release hole 27 is arranged at the outer ring of the drill rod 1, the release hole 27 is communicated between the outside of the drill rod 1 and the pressure chamber 25, the elastic anti-explosion metal sheet 41 is fixedly arranged in the release hole 27, a cross hole 42 is arranged in the middle of the elastic anti-explosion metal sheet 41, the pipeline 6 is communicated with the pressure chamber 25 through a connecting pipeline 43, and a seventh electromagnetic valve 44 is arranged in the connecting pipeline 43.

The ultrasonic activation mechanism 5 comprises an ultrasonic generator 30 and a shell 29, the shell 29 is fixedly arranged on the inner wall of the drill rod 1, the ultrasonic generator 30 is arranged inside the shell 29, and the shell 29 is filled with liquid.

After the coal seam 7 is fractured, the ultrasonic generator 30 is started, and the ultrasonic generator 30 transmits ultrasonic waves to the fractured coal seam 7, so that the coal seam 7 is further loosened, and the purpose of ultrasonically activating the coal seam 7 is achieved.

Can be on the basis of drilling rod 1 constantly advance in coal seam 7, need not many times location and punch, improve the efficiency of construction, along with drilling rod 1 constantly advances in coal seam 7, can be once fracturing every suitable distance in coal seam 7, the practicality is strong.

The adjusting mechanism 4 comprises a control box 28, a spring 17, a push plate 15, a push groove 16, a connecting rod 18 and a pressure push plate 19, the control box 28 is fixedly arranged on the inner wall of the drill rod 1, the pressure push plate 19 is slidably arranged in the control box 28, one surface of the pressure push plate 19, which is far away from the pipeline 6, is fixedly connected with the connecting rod 18, one end of the connecting rod 18, which is far away from the pressure push plate 19, movably penetrates through the outer surface of the control box 28, the push groove 16 is arranged at the outer ring of the drill rod 1, the push groove 16 is communicated with the inside and the outside of the drill rod 1, the push plate 15 is movably arranged in the push groove 16, one surface of the push plate 15, which is close to the control box 28, is fixedly connected with the end part of the connecting rod 18, one end of the spring 17 is fixedly welded on one surface of the pressure push plate 19 close to the connecting rod 18, the other end of the spring 17 is fixedly welded on the inner wall of one side of the control box 28 far away from the pipeline 6, a pressure accumulation chamber 37 is formed between one surface of the pressure push plate 19 close to the pipeline 6 and the inside of the control box 28, one surface of the control box 28 close to the pipeline 6 is fixedly connected with a first pair of connecting pipelines 38, a second butt joint pipeline 39 is fixedly arranged at the outer ring of the pipeline 6, the first pair of connecting pipelines 38 is in butt joint with the second pair of connecting pipelines 39, a sixth electromagnetic valve 40 is arranged in the second pair of connecting pipelines 39, the pressure accumulation chamber 37 is communicated with the first pair of connecting pipelines 38, and the second pair of connecting pipelines 39 is communicated with the inside of the pipeline 6.

When the drilling direction of adjustment drill bit 2 in coal seam 7, can open corresponding sixth solenoid valve 40, make the medium in the pipeline 6 get into pressure accumulation cavity 37, medium promotion pressure push pedal 19 removes to the direction of keeping away from pipeline 6, thereby make push pedal 15 stretch out push away groove 16, play the purpose of pushing away the conflict in coal seam 7 inner structure, the push pedal 15 of the different positions in adjustment drilling rod 1 outer lane, thereby the holistic direction of creeping into of control drill bit 2, and GPS fixes a position chip 33 and can be used to monitor the position of drilling rod 1 in coal seam 7, and convenient to use is convenient for control.

One side of the control box 28 is provided with a first air vent 21, a fourth electromagnetic valve 20 is arranged in the first air vent 21, the first air vent 21 is communicated between the pressure accumulation chamber 37 and the outside of the control box 28, one end of the drill rod 1, which is far away from the drill bit 2, is provided with a second air vent 23, the second air vent 23 is communicated with the inside and the outside of the drill rod 1, and a fifth electromagnetic valve 24 is arranged in the second air vent 23.

In order to enable the push plate 15 to reset, a fourth electromagnetic valve 20 is arranged in the first air release hole 21, when the fourth electromagnetic valve 20 is opened, the medium in the pressure accumulation chamber 37 can be released into the main chamber 31, after the pressure of the medium in the pressure accumulation chamber 37 is lost, the spring 17 pushes the pressure push plate 19 to reset, and when the pressure push plate 19 resets, the push plate 15 is pulled through the connecting rod 18 to reset; in order to avoid an excessive medium pressure in the pressure accumulation chamber 37, a second air release hole 23 is provided at the end of the drill rod 1, and when the fifth solenoid valve 24 is opened, the excess medium in the pressure accumulation chamber 37 can be released.

The control boxes 28 are arranged in a plurality of groups along the inner wall of the drill rod 1, and the control boxes 28 are distributed at equal angles.

One end of the pipeline 6 extending out of the drill rod 1 is connected with a high-pressure pump 8, the high-pressure pump 8 is respectively connected with a water tank 9, an oil tank 10 and a gas tank 11, and a first electromagnetic valve 12, a second electromagnetic valve 13 and a third electromagnetic valve 14 are respectively arranged at the positions where the water tank 9, the oil tank 10 and the gas tank 11 are communicated with the high-pressure pump 8.

The high-pressure pump 8 can convey a medium into the pipeline 6, in the invention, the drilling direction of the drill bit 2 is adjusted by using the medium, the coal seam 7 is subjected to ultrasonic activation and staged fracturing by using the medium, and the medium uniformly disperses the fractured coal seam 7 in the structure of the coal seam 7, which is more beneficial to the transmission of ultrasonic waves generated by the ultrasonic generator 30, thereby loosening the coal seam 7.

when water is selected, the first electromagnetic valve 12 is opened, the high-pressure pump 8 pumps the water stored in the water tank 9 into the pipeline 6, and the cost is low when the water is used.

When selecting fluid, open second solenoid valve 13 can, during high-pressure pump 8 pumps the fluid suction of storage in the oil tank 10 to pipeline 6, when utilizing fluid, fluid can be better fill and stay in coal seam 7, promote subsequent ultrasonic activation.

When air is selected, the third electromagnetic valve 14 is opened, the high-pressure pump 8 pumps the air stored in the air tank 11 into the pipeline 6, the cost is low, the air diffusivity is stronger, and the coal seam 7 is more easily fractured.

The invention also discloses an ultrasonic activation staged fracturing method, which comprises the ultrasonic activation staged fracturing device for the coal seam and the following steps:

s1: continuous drilling, when the motor 32 is started, the motor 32 drives the drill bit 2 to rotate, the drill bit 2 drills in the coal seam 7, the drill rod 1 extends into the coal seam 7 while the drill bit 2 drills in the coal seam 7, when the drilling direction of the drill bit 2 in the coal seam 7 is adjusted, the corresponding sixth electromagnetic valve 40 can be opened, a medium in the pipeline 6 enters the pressure accumulation chamber 37, the medium pushes the pressure push plate 19 to move in a direction away from the pipeline 6, so that the push plate 15 extends out of the push groove 16 to achieve the purpose of pushing and colliding in the internal structure of the coal seam 7, the push plates 15 at different positions on the outer circle of the drill rod 1 are adjusted, so that the overall drilling direction of the drill bit 2 is controlled, the GPS positioning chip 33 can be used for monitoring the position of the drill rod 1 in the coal seam 7 and is convenient to control, because the pipeline 6 is connected with the drill rod 1, so that the drill rod 1 can continuously drill in the coal seam 7, and can be fractured once after a certain distance along with the drill rod 1 continuously advancing in the coal seam 7;

s2: in the fracturing, after the drill rod 1 reaches a proper position in the coal seam 7, the medium is filled into the pipeline 6 to be pressurized, the seventh electromagnetic valve 44 is opened, the medium enters the pressure cavity 25 through the connecting pipeline 43, and after the medium in the pressure cavity 25 reaches a certain pressure, the elastic anti-explosion metal sheet 41 is broken from the position of the cross hole 42 under the limit pressure, so that the medium is quickly pressed into the coal seam 7 from the release hole 27, and the aim of fracturing the coal seam 7 is fulfilled;

s3: ultrasonic activation, the medium is even dispersion in 7 layer structures in coal seam 7 after fracturing coal seam 7, is favorable to the ultrasonic wave that ultrasonic generator 30 during operation produced more to transmit in coal seam 7 to carry out comprehensive loose activation to coal seam 7.

Claims

1. The utility model provides a coal seam ultrasonic activation staged fracturing device, includes drilling rod (1), its characterized in that: the coal seam fracturing device is characterized in that the drill rod (1) is of a cylindrical structure, a drill bit (2), a fracturing mechanism (3), an adjusting mechanism (4), an ultrasonic activating mechanism (5) and a pipeline (6) are arranged on the drill rod (1), the drill bit (2) is arranged at the end portion of the drill rod (1) and used for drilling in a coal seam (7), the fracturing mechanism (3) is used for pressurizing the coal seam (7) to enable the coal seam (7) to be fractured, the ultrasonic activating mechanism (5) is used for generating ultrasonic waves, the ultrasonic-assisted coal seam (7) is fractured, the fracturing mechanism (3) and the ultrasonic activating mechanism (5) are both arranged in the middle of the drill rod (1), the adjusting mechanism (4) is provided with two groups, the two groups of adjusting mechanisms (4) are respectively arranged at the end portion of the drill rod (1), the adjusting mechanism (4) is used for adjusting the drilling direction of the drill bit (2) in the coal seam (7), the pipeline (6) is arranged inside the drill rod (1), and one end face, far away from the drill bit (2), extends out of the pipeline (6).

2. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 1, wherein: the drilling rod (1) is close to inside baffle (35) that is provided with of one end of drill bit (2), baffle (35) keep apart into vice cavity (34) that is close to drill bit (2) and main cavity (31) of keeping away from drill bit (2) with drilling rod (1) inside, be provided with motor (32) in vice cavity (34), the end transmission of motor (32) is connected with motor shaft (36), motor shaft (36) activity is stretched out drilling rod (1) terminal surface, and motor shaft (36) activity is stretched out fixed connection between position and the drill bit (2) of drilling rod (1) tip, still install GPS location chip (33) in vice cavity (34).

3. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 1, wherein: a conducting wire (22) is arranged in the pipeline (6), and one end of the conducting wire (22) is connected with a motor (32).

4. The ultrasonic activation staged fracturing device for coal seams as claimed in claim 1, wherein: the fracturing mechanism (3) comprises a pressure box (26), a pressure cavity (25), a release hole (27) and an elastic anti-explosion metal sheet (41), the pressure box (26) is fixedly arranged on the inner wall of the drill rod (1), the pressure cavity (25) is positioned between the inner wall of the pressure box (26) and the inner wall of the drill rod (1), the release hole (27) is arranged at the outer ring of the drill rod (1), the release hole (27) is communicated between the outside of the drill rod (1) and the pressure cavity (25), the elastic anti-explosion metal sheet (41) is fixedly arranged in the release hole (27), a cross hole (42) is formed in the middle of the elastic anti-explosion metal sheet (41), the pipeline (6) is communicated with the pressure cavity (25) through a connecting pipeline (43), and a seventh electromagnetic valve (44) is arranged in the connecting pipeline (43).

5. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 1, wherein: the ultrasonic activation mechanism (5) comprises an ultrasonic generator (30) and a shell (29), the shell (29) is fixedly arranged on the inner wall of the drill rod (1), the ultrasonic generator (30) is arranged inside the shell (29), and liquid is filled inside the shell (29).

6. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 1, wherein: adjustment mechanism (4) are including control box (28), spring (17), push pedal (15), push away groove (16), connecting rod (18) and pressure push pedal (19), control box (28) are fixed to be set up on the inner wall of drilling rod (1), pressure push pedal (19) slide and set up inside control box (28), fixed connection between the one side of pipeline (6) and connecting rod (18) is kept away from in pressure push pedal (19), the one end activity of pressure push pedal (19) is kept away from in connecting rod (18) passes control box (28) surface, push away groove (16) and set up in drilling rod (1) outer lane department, push away inside and outside groove (16) intercommunication drilling rod (1), push pedal (15) activity sets up in pushing away groove (16), fixed connection between the one side that push pedal (15) are close to control box (28) and connecting rod (18) tip, the one end fixed welding of spring (17) is close to the one side of connecting rod (18) in pressure push pedal (19), and the other end fixed welding of spring (17) is kept away from one side of pipeline (6) and is close to pipe (6) inner wall of taking over and is connected with pipeline (37) and hold the pressure push pedal (6) and is taken over the pipe (37) and is connected with the one side of pipeline (6) and hold the control box (6) and hold the pipe (37) and hold the pipeline (6) and take over the one side of taking over the inside and take over the pipeline (6) and take over, and take over the pipeline (6) and take over the one side of taking over, and be connected with the one side of pipeline (6) and take over the pipeline (37) and take over the one side of taking over the pipeline (6) is connected with the one side of taking over the pipeline (6) and hold the pipeline (6) and take over the one side of taking over the pipeline (6) and take over the one side of taking over ) The pressure accumulation type pipeline connecting device is characterized in that a second butt joint pipeline (39) is fixedly arranged at the outer ring of the pipeline (6), the first butt joint pipeline (38) is in butt joint with a second butt joint pipeline (39), a sixth electromagnetic valve (40) is arranged in the second butt joint pipeline (39), the pressure accumulation chamber (37) is communicated with the first butt joint pipeline (38), and the second butt joint pipeline (39) is communicated with the interior of the pipeline (6).

7. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 6, wherein: one side of control box (28) is provided with first gas release hole (21), be provided with fourth solenoid valve (20) in first gas release hole (21), first gas release hole (21) intercommunication is between pressure accumulation cavity (37) and control box (28) outside, the one end that drill bit (2) were kept away from in drilling rod (1) is provided with second gas release hole (23), second gas release hole (23) intercommunication drilling rod (1) inside and outside, be provided with fifth solenoid valve (24) in second gas release hole (23).

8. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 6, wherein: the control box (28) is provided with a plurality of groups along the inner wall of the drill rod (1), and the control boxes (28) are distributed at equal angles.

9. The ultrasonic-activated staged fracturing device for coal seams as claimed in claim 1, wherein: the drill pipe is characterized in that one end, extending out of the drill pipe (1), of the pipeline (6) is connected with a high-pressure pump (8), a water tank (9), an oil tank (10) and an air tank (11) are connected to the high-pressure pump (8) respectively, and a first electromagnetic valve (12), a second electromagnetic valve (13) and a third electromagnetic valve (14) are arranged at the positions where the water tank (9), the oil tank (10), the air tank (11) and the high-pressure pump (8) are communicated respectively.

10. An ultrasonic activation staged fracturing method is characterized in that: the coal seam ultrasonic activation staged fracturing device of any one of claims 1 to 9, further comprising the following method:

s1: continuous drilling, when the motor (32) is started, the motor (32) drives the drill bit (2) to rotate, the drill bit (2) drills in the coal seam (7), the drill rod (1) extends into the coal seam (7) while the drill bit (2) drills in the coal seam (7), when the drilling direction of the drill bit (2) in the coal seam (7) is adjusted, the corresponding sixth electromagnetic valve (40) can be opened, a medium in the pipeline (6) enters the pressure accumulation chamber (37), the medium pushes the pressure push plate (19) to move in the direction far away from the pipeline (6), so that the push plate (15) extends out of the push groove (16) and plays a role in pushing and abutting against the inner structure of the coal seam (7), push plates (15) at different positions on the outer ring of the drill rod (1) are adjusted, so as to control the overall drilling direction of the drill bit (2), and the GPS positioning chip (33) can be used for monitoring the position of the drill rod (1) in the coal seam (7), so as to facilitate control, as the drill rod (1) is continuously connected with the drill rod (6), so that the drill rod (1) can continuously drill in the coal seam (7) at an appropriate distance, and the drill rod (7) after the drill seam (7) is pressed once;

s2: fracturing, after the drill rod (1) reaches a proper position in the coal seam (7), filling a medium into the pipeline (6) for pressurization, opening a seventh electromagnetic valve (44), enabling the medium to enter the pressure cavity (25) through a connecting pipeline (43), and after the medium in the pressure cavity (25) reaches a certain pressure, breaking the elastic anti-explosion metal sheet (41) from the position of the cross hole (42) under the limit pressure, so that the medium is quickly pressed into the coal seam (7) from the release hole (27), and the purpose of fracturing the coal seam (7) is achieved;

s3: ultrasonic activation, the medium is even dispersion in coal seam (7) layer structure after fracturing coal seam (7), is favorable to the ultrasonic wave that ultrasonic generator (30) during operation produced more to transmit in coal seam (7) to carry out comprehensive loose activation to coal seam (7).