High-energy gas phase change fracturing anti-reflection device

Abstract

The invention provides a high-energy gas phase change fracturing anti-reflection device, relates to the technical field of oil and gas exploitation, and aims to solve the problem of unreliable connection caused by single-line connection in the prior art. The high-energy gas phase change fracturing anti-reflection device comprises a leading-in cone, a gas fracturing section and a plugging device, and the gas fracturing section comprises a high-energy gas phase change fracturing device and a connecting pipe; the gas phase change fracturing device is connected with the connecting pipe through a quick connector, the quick connector comprises a first connector and a second connector, a double-line quick-pass sleeve is arranged in the first connector, a double-line quick-pass cone is arranged in the second connector, and the double-line quick-pass sleeve is connected with the double-line quick-pass cone. The gas phase change fracturing device and the connecting pipe are connected through double wires by inserting the double-wire quick-passing cone and the double-wire quick-passing sleeve, and the plugging device is connected with the gas phase change fracturing device or the connecting pipe through the quick connector. According to the high-energy gas phase change fracturing anti-reflection device, an internal circuit conduction structure is completely independent of the pipe wall, automatic circuit conduction is completed while mechanical connection is completed, and connection is more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation, and in particular to a high-energy gas phase change fracturing and permeability enhancement device. Background Art

[0002] The geological structure conditions in which my country's coal resources are located are complex, and its production is threatened by severe natural conditions such as gas, water disasters, fire, high ground pressure, and high ground temperature. Especially in recent years, with the substantial increase in the depth and scale of mining in my country's mines, gas disasters have become the biggest threat to my country's coal mine safety production.

[0003] Increasing the permeability and extraction of coal seams is considered to be the most effective measure for controlling coal seam gas disasters and utilizing clean energy. In general, there are three main types of measures: First, improve the permeability of coal bodies when they are depressurized and contracted, such as using mining protective layers and using large-scale well and tunnel mining projects to depressurize and remove gas from the coal seams being treated; second, discharge gas, such as pre-drilling, hydraulic fracturing, hydraulic punching, loosening blasting and other measures to pre-depressurize, increase permeability and pre-extract coal seam gas; third, improve the plasticity of coal bodies and seal gas, such as low-pressure moistening of coal bodies, hydraulic loosening measures, and injecting gas-eating bacteria or biological liquids into coal seams to pre-decompose or plasticize coal seam gas. Among them, measure 2 is the most widely used and most common. In terms of technology, loosening blasting has the best effect. Common ones include explosive loosening blasting and high-energy gas loosening blasting. Due to the danger of explosives themselves, the violent vibration that may cause coal and gas outbursts, and the complex operating process, loosening blasting and permeability enhancement technology has not been widely promoted and applied.

[0004] The basic principle of high-energy gas fracturing technology is to use air compressors to store energy, and instantly release high-pressure gas as needed to work on the coal and rock mass, causing the coal and rock mass to break and produce cracks. Air compressors are used underground in coal mines to create high-pressure gas sources, and gas (air or nitrogen) is injected into sealed boreholes to increase the pressure in the boreholes. Under the action of high pressure, the cracks in the coal mass are expanded, thereby achieving the effect of increasing permeability and pumping. In recent years, another popular high-energy gas fracturing equipment is the CO2 blaster, which uses the expansion energy generated by the vaporization of CO2 to break the coal and rock mass. The application of carbon dioxide phase change technology is mainly focused on shallow hole blasting fracturing, and there is less research on deep hole blasting and blasting permeability enhancement.

[0005] Since most of the current coal mines are above 100m, deep hole construction is necessary to effectively increase permeability and pumping. The existing technology has the following problems: the method of using air compressors to make high-pressure gas sources has high requirements for air compressors, high-pressure sealing of the system, and pressure resistance of materials. It also has high requirements for drilling hole sealing and coal seam surrounding rock conditions. At the same time, the energy efficiency ratio is also poor, so it has not been widely promoted and applied and has been basically abandoned. Regarding CO2 blasters, the "single-line connection + pipe wall conduction" method is still used, and an efficient and reliable deep hole quick connection, conduction, and detonation technology path has not been effectively developed. There are many practical problems such as unreliable connection, complex operation, low efficiency of delivery and removal, high failure rate, and excessive associated gas. Summary of the invention

[0006] The purpose of the present invention is to provide a high-energy gas phase change fracturing and permeability enhancement device to solve the problem of unreliable connection caused by single-line connection in the prior art. Compared with the existing single-line connection and pipe wall conduction method, the internal circuit conduction structure of the high-energy gas phase change fracturing and permeability enhancement device of the present invention is completely independent of the pipe wall, and the mechanical connection is completed while the line is automatically conducted without the need for additional operation. The connection is more reliable, the operation is simple, and the failure rate is low.

[0007] The present invention provides a high-energy gas phase change fracturing and permeability enhancement device, comprising an introduction cone, a gas fracturing section and a plugging device, wherein the introduction cone is connected to the front end of the gas fracturing section, the gas fracturing section comprises a high-energy gas phase change fracturing device and a connecting pipe, the gas phase change fracturing device and the connecting pipe are connected via a quick connector, the quick connector comprises a first connector and a second connector, a double-wire quick-pass sleeve is arranged in the first connector, a double-wire quick-pass cone is arranged in the second connector, the gas phase change fracturing device and the connecting pipe are connected by double wires through the plugging of the double-wire quick-pass cone and the double-wire quick-pass sleeve, and the plugging device is connected to the gas phase change fracturing device or the connecting pipe via the quick connector.

[0008] As a preferred solution of the present invention, the double-wire quick-pass sleeve includes a central conductive tube and an outer conductive ring, the central conductive tube and the outer conductive ring are insulated, the double-wire quick-pass cone includes an outer conductive column and an inner conductive column, the outer conductive column is sleeved on the outside of the inner conductive column and is provided with a gap with the inner conductive column, when the double-wire quick-pass sleeve is connected to the double-wire quick-pass cone, the inner conductive column is inserted into the central conductive tube, and the outer conductive column is inserted into the outer conductive ring.

[0009] As a preferred solution of the present invention, an insulating ring is arranged on the outer side of the outer conductive column, and the insulating ring is arranged around the outer conductive column. When the two-wire quick-pass sleeve is connected to the two-wire quick-pass cone, the insulating ring is clamped between the side wall of the first connector and the outer conductive sleeve ring.

[0010] As a preferred solution of the present invention, an external thread is provided on the outer side of the first connector, an internal thread is provided on the inner side of the second connector, and the first connector and the second connector are connected by matching the external thread and the internal thread.

[0011] As a preferred solution of the present invention, the first connector and the second connector are respectively provided at both ends of the high-energy gas phase change fracturing device, the high-energy gas phase change fracturing device comprises a phase change tube body and a pressure relief tube body, the pressure relief tube body is connected to the front end of the phase change tube body, a plurality of energy relief holes are provided on the tube wall of the phase change tube body, a first double-pass wire, a trigger and a phase change liquid are provided in the phase change tube body, the first double-pass wire and the phase change liquid are provided on the axis of the phase change tube body, and the trigger is connected to the double-wire quick-pass cone and the double-wire quick-pass sleeve at both ends of the high-energy gas phase change fracturing device through the first double-pass wire.

[0012] As a preferred solution of the present invention, the first connector and the second connector are respectively provided at both ends of the connecting tube, the connecting tube includes a connecting tube body, and a second double-pass conductive wire is provided in the connecting tube body along its axial direction, and the two ends of the second double-pass conductive wire are respectively connected to the double-wire quick-pass cone and the double-wire quick-pass sleeve located at both ends of the connecting tube.

[0013] As a preferred solution of the present invention, the occluder includes a sealing tube body and a high-pressure airbag, wherein the high-pressure airbag is sleeved around the sealing tube body, the front end of the sealing tube body is connected to the first connector or the second connector, and the tail end of the sealing tube body is connected to a gas injection interface and a quick-connection interface, the quick-connection interface is connected to the two-wire quick-connect cone or the two-wire quick-connection sleeve through a third two-way conductor, and the gas injection interface is connected to the high-pressure airbag.

[0014] As a preferred solution of the present invention, a plurality of sieve holes are arranged on the front end side wall of the blocking tube body, the high-pressure airbag is sleeved on the end of the blocking tube body away from the sieve holes, and a pumping and exhaust interface is also provided at the rear end of the blocking tube body, and the pumping and exhaust interface is connected to the sieve holes.

[0015] As a preferred solution of the present invention, the front end of the guide cone is provided with a conical head, and the rear end of the guide cone is provided with an external thread or an internal thread connected to the high-energy gas phase change fracturing device or the connecting pipe.

[0016] As a preferred solution of the present invention, M high-energy gas phase change fission devices are provided, N connecting pipes are provided, and two adjacent high-energy gas phase change fission devices are directly connected or indirectly connected through the connecting pipes.

[0017] Compared with the prior art, the present invention has the following positive effects:

[0018] The high-energy gas phase change fracturing and permeability enhancement device provided by the present invention comprises an introduction cone, a gas fracturing section and a plugging device, wherein the introduction cone is connected to the front end of the gas fracturing section, the gas fracturing section comprises a high-energy gas phase change fracturing device and a connecting pipe, the gas phase change fracturing device and the connecting pipe are connected via a quick connector, the quick connector comprises a first connector and a second connector, a double-wire quick-pass sleeve is arranged in the first connector, a double-wire quick-pass cone is arranged in the second connector, the gas phase change fracturing device and the connecting pipe are connected by double wires through the plugging of the double-wire quick-pass cone and the double-wire quick-pass sleeve, and the plugging device is connected to the gas phase change fracturing device or the connecting pipe via the quick connector. In the present invention, the high-energy gas phase change fracturing device, the connecting tube and the plugging device are connected by a quick connector to achieve double-wire plug-in connection between the double-wire quick-pass cone and the double-wire quick-pass sleeve. Compared with the existing single-wire connection and pipe wall conduction method, the internal circuit conduction structure is completely independent of the pipe wall, and the mechanical connection is completed while the line is automatically conducted without the need for additional operation. The connection is more reliable, the operation is simple, and the failure rate is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic structural diagram of the high-energy gas phase change cracking and permeability enhancement device of the present invention;

[0021] Figure 2 is a schematic structural diagram of the first connector in the present invention;

[0022] Figure 3 It is a schematic structural diagram of the second connector in the present invention.

[0023] In the figure: 1. guide cone; 11. conical head; 2. high-energy gas phase change fracturator; 21. pressure relief tube body; 211. energy relief hole; 22. phase change tube body; 23. first double-pass wire; 24. trigger; 25. phase change liquid; 3. connecting tube; 31. connecting tube body; 32. second double-pass wire; 33. connecting column; 4. plugger; 41. plugging tube body; 411. sieve hole; 42. high-pressure airbag; 43. gas injection interface; 44. quick conduction interface; 45. extraction interface; 5. first connector; 51. double-wire quick-pass sleeve; 511. outer conductive sleeve ring; 512. central conductive cylinder; 6. second connector; 61. double-wire quick-pass cone; 611. outer conductive column; 612. inner conductive column; 613. insulating ring. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more than two; the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "front end", "back end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplification, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0027] Embodiment 1:

[0028] This embodiment provides a high-energy gas phase change cracking and permeability enhancement device, such as Figure 1-Figure 3 As shown, it comprises a guide cone 1, a gas fracturing section and a plugging device 4, wherein the guide cone 1 is connected to the front end of the gas fracturing section. The guide cone 1 is used to reduce the propulsion resistance in the borehole.

[0029] The gas fracturing section includes a high-energy gas phase change fracturator 2 and a connecting pipe 3, and the gas phase change fracturator is connected to the connecting pipe 3 through a quick connector. The quick connector includes a first connector 5 and a second connector 6, a double-wire quick-pass sleeve 51 is arranged in the first connector 5, and a double-wire quick-pass cone 61 is arranged in the second connector 6. The gas phase change fracturator and the connecting pipe are connected by plugging the double-wire quick-pass cone 61 with the double-wire quick-pass sleeve 51 to achieve double-wire connection. The plug 4 is connected to the gas phase change fracturator or the connecting pipe through a quick connector. The plug 4 is used to plug the rear end of the borehole to prevent toxic and harmful gases in the borehole from leaking out.

[0030] In this embodiment, the high-energy gas phase change fission device 2, the connecting tube and the plugging device 4 are connected by a quick connector to achieve double-wire plug-in connection between the double-wire quick-pass cone 61 and the double-wire quick-pass sleeve 51. Compared with the existing single-wire connection and pipe wall conduction method, the internal circuit conduction structure is completely independent of the pipe wall, and the mechanical connection is completed while the line is automatically conducted without additional operation. The connection is more reliable, the operation is simple, and the failure rate is low.

[0031] As a preferred implementation mode, Figure 2 and Figure 3 As shown, the two-wire quick-pass sleeve 51 includes a central conductive tube 512 and an outer conductive ring 511, and the central conductive tube 512 and the outer conductive ring 511 are insulated. The central conductive tube 512 and the outer conductive ring 511 are insulated from each other and from the outer tube wall of the first connector 5. The central conductive tube 512 and the outer conductive ring 511 can be made of copper, which has good conductivity.

[0032] The double-wire quick-pass cone 61 includes an outer conductive column 611 and an inner conductive column 612. The outer conductive column 611 is sleeved on the outer side of the inner conductive column 612 and is provided with a gap with the inner conductive column 612. The outer conductive column 611 and the inner conductive column 612 are insulated from each other and from the outer tube wall of the second connector 6. The outer conductive column 611 and the inner conductive column 612 can be made of copper, which has good conductivity.

[0033] When the double-wire quick-pass sleeve 51 is connected to the double-wire quick-pass cone 61, the inner conductive column 612 is inserted into the central conductive cylinder, and the outer conductive column 611 is inserted into the outer conductive ring 511. The central conductive cylinder 512 is retracted into the outer conductive ring 511, and the inner conductive column 612 is extended outward from the outer conductive column 611, and the inner conductive column 612 abuts against the central conductive cylinder 512. The inner conductive column 612 can be an elastic conductive column to ensure that the inner conductive column 612 abuts against the central conductive cylinder 512, so that the inner conductive column 612 and the central conductive cylinder 512 have good contact.

[0034] In this embodiment, the inner conductive column 612 is connected to the central conductive tube 512, and the outer conductive column 611 is connected to the outer conductive ring 511, which can be quickly assembled and connected, thereby realizing a two-wire circuit connection and avoiding mutual interference between the two-wire conductors.

[0035] As a preferred embodiment, an insulating ring 613 is provided on the outer side of the outer conductive column 611, and the insulating ring 613 is arranged around the outer conductive column 611, and the insulating ring 613 is arranged below the outer conductive column 611. The insulating ring 613 can be made of plastic. When the two-wire quick-pass sleeve 51 is connected to the two-wire quick-pass cone 61, the insulating ring 613 is stuck between the side wall of the first connector 5 and the outer conductive sleeve ring 511, so as to prevent the side wall of the first connector 5 and the outer conductive sleeve ring 511 from being conductive.

[0036] As a preferred embodiment, an external thread is provided on the outer side of the first connector 5, and an internal thread is provided on the inner side of the second connector 6, and the first connector 5 and the second connector 6 are connected by the external thread and the internal thread. The outer diameter of the first connector 5 is adapted to the inner diameter of the second connector.

[0037] In this embodiment, a male-female coupling structure is formed between the first connector 5 and the second connector 6, and a mechanical hard connection is achieved through threads, so that the connection is reliable and the operation is convenient.

[0038] As a preferred embodiment, the two ends of the high energy gas phase change fracturing device 2 are respectively provided with a first connector 5 and a second connector 6. The tube body of the high energy gas phase change fracturing device 2 and the outer tube bodies of the first connector 5 and the second connector 6 can be an integrated structure.

[0039] The high energy gas phase change fracturing device 2 is a high energy gas generating device and a source of fracturing and permeability enhancement energy. When multiple high energy gas phase change fracturing devices 2 are provided, the multiple high energy gas phase change fracturing devices 2 are connected end to end in sequence through the first connector 5 and the second connector 6 .

[0040] The high-energy gas phase change fracturing device 2 includes a phase change tube body 22 and a pressure relief tube body 21, and the pressure relief tube body 21 is connected to the front end of the phase change tube body 22. A plurality of energy release holes 211 are arranged on the tube wall of the phase change tube body 22. The energy release holes 211 can be selected in different opening modes and opening numbers according to needs. Both the phase change tube body 22 and the pressure relief tube body 21 are hollow steel tubes with high strength. The phase change tube body 22 and the pressure relief tube body 21 can be an integrated structure.

[0041] A first double-pass wire 23, a trigger 24 and a phase change liquid 25 are arranged in the phase change tube body 22. The first double-pass wire 23 and the phase change liquid 25 are arranged on the axis of the phase change tube body 22. The first double-pass wire 23 is a double-wire wire used for circuit conduction transition. The phase change liquid 25 is a high-pressure compressed liquid gas medium, which can be conditioned as needed, and the internal gas-liquid medium can use different media as needed, such as liquid carbon dioxide, nitrogen or oxygen. The trigger 24 is an electrically triggered heating agent that provides instantaneous vaporization heat for the phase change liquid 25. The trigger 24 is connected to the double-wire quick-pass cone 61 and the double-wire quick-pass sleeve 51 at both ends of the high-energy gas phase change fracturing device 2 through the first double-pass wire 23.

[0042] The triggering agent 24 triggers the phase change liquid 25 to undergo phase change, generating a large amount of high-temperature, high-pressure gas that is released into the pressure relief pipe body 21 and radially sprayed into the borehole along the energy release holes 211 on the pressure relief pipe body 21 to perform work on the target formation.

[0043] As a preferred implementation mode, Figure 1As shown, the two ends of the connecting pipe 3 are respectively provided with a first connector 5 and a second connector 6. The connecting pipe body 31 of the connecting pipe 3 can be an integral structure with the outer pipe body of the first connector 5 and the outer pipe body of the second connector 6.

[0044] The connecting tube includes a connecting tube body 31, in which a second double-pass wire 32 is arranged along its axial direction. A connecting column 33 is arranged in the connecting tube body 31, and the outer diameter of the connecting column 33 is adapted to the inner diameter of the connecting tube body 31. A center hole arranged along its axis is arranged in the connecting column 33, and the second double-pass wire 32 is arranged through the center hole. The two ends of the second double-pass wire 32 are respectively connected to the double-wire quick-pass cone 61 and the double-wire quick-pass sleeve 51 located at the two ends of the connecting tube. The connecting tube body 31 is a hollow steel tube, and the built-in second double-pass wire 32 is a double wire, realizing a conductive transition structure.

[0045] As a preferred embodiment, M high-energy gas phase change fissioners 2 are provided, and N connecting pipes 3 are provided, and two adjacent high-energy gas phase change fissioners 2 are directly connected or indirectly connected through the connecting pipe 3. A certain number of high-energy gas phase change fissioners 2 can be connected continuously or connected to the connecting pipe 3, and a certain number of connecting pipes 3 are used to separate multiple high-energy gas phase change fissioners 2 into multiple groups.

[0046] In this embodiment, M is the number of high-energy gas phase change fission devices 2 that need to be connected, and N is the number of connecting pipes 3 that need to be connected. Among them, the front end of the first high-energy gas phase change fission device 2 is connected to the guide cone 1, and the rear end is connected to a certain number M of high-energy gas phase change fission devices 2 of the same specifications as required, and M is determined according to the use requirements. The connecting pipe 3 is used to "dilute" the density of the high-energy gas phase change fission device 2, control the spacing between the high-energy gas phase change fission devices 2, and serve as a safety buffer zone transition connection carrier. The number N used is determined according to actual needs. The last connecting pipe 3 is connected to the rear plugging device 4.

[0047] As a preferred embodiment, the plugging device 4 includes a plugging tube body 41 and a high-pressure airbag 42, and the high-pressure airbag 42 is sleeved around the plugging tube body 41. The front end of the plugging tube body 41 is connected to the first connector 5 or the second connector 6, and the first connector 5 or the second connector 6 is used to connect to the high-energy gas phase change fracturing device 2 or the connecting pipe 3 at the front end.

[0048] The tail end of the plugging tube body 41 is connected with a gas injection interface 43 and a quick conduction interface 44, the quick conduction interface 44 is connected to the double-wire quick-cone 61 or the double-wire quick-cone sleeve 51 through a third double-pass wire, and the third double-pass wire is connected to the adjacent connecting tube 3 to realize circuit conduction. The quick conduction interface 44 is internally connected to the first connector 5 or the second connector 6, and externally connected to the detonator.

[0049] The gas injection interface 43 is connected to the high-pressure airbag 42. A control valve is provided on the gas injection interface 43 to control the switch state of the gas injection interface 43. The high-pressure airbag 42 is wrapped around the plugging tube body 41 and can effectively plug the drill hole after being inflated through the gas injection interface 43.

[0050] When the borehole needs to be sealed, the gas injection interface 43 is opened to inflate the high-pressure airbag 42, and the high-pressure airbag 42 is sealed in the borehole. On the one hand, it can fix the high-energy gas phase change fracturing device 2 and the connecting pipe 3 in the borehole, and on the other hand, it can prevent harmful gases in the borehole from gushing out.

[0051] As a preferred embodiment, a plurality of sieve holes 411 are arranged on the front side wall of the plugging tube 41, the high-pressure airbag 42 is sleeved on the end of the plugging tube 41 away from the sieve holes 411, and a pumping interface 45 is also provided at the tail end of the plugging tube 41, and the pumping interface 45 is connected to the sieve holes 411. A control valve is provided on the pumping interface 45 for controlling the switch state of the pumping interface 45.

[0052] The extraction interface 45 in this embodiment is externally connected to an extraction pipeline. After the operation is completed, the control valve on the extraction interface 45 can be opened, and the harmful gas in the borehole can enter the extraction interface 45 through the sieve hole 411 as soon as possible, and then pass into the connected extraction pipeline for rapid discharge, so as to prevent the gas from rushing into the tunnel and causing the index to exceed the limit or endangering the safety of workers.

[0053] As a preferred embodiment, a conical head 11 is provided at the front end of the guide cone 1, and an external thread or an internal thread connected to the high-energy gas phase change fracturing device 2 or a connecting pipe is provided at the rear end of the guide cone 1.

[0054] The guide cone 1 is made of an integrated stainless steel material, and the conical head 11 can effectively reduce the propulsion resistance in the hole.

[0055] Preferably, the outer diameters of the guide cone 1, the high-energy gas phase change fracturing device 2, the connecting tube 3 and the plugging device 4 are equal.

[0056] In this embodiment, an external thread can be provided at the tail end of the guide cone 1 for connecting to the first connector of the first high-energy gas phase change fracturing device 2. Multiple high-energy gas phase change fracturing devices 2 can be alternately connected to multiple connecting tubes 3 through the first connector and the second connector. The second connector of the last connecting tube 3 is connected to the first connector at the front end of the plugging device 4, thereby realizing the mechanical connection between the guide cone 1, the high-energy gas phase change fracturing device 2, the connecting tube 3 and the plugging device 4.

[0057] In this embodiment, multiple high-energy gas phase change fracturing devices 2 are ignited in sequence by controlling the detonator, and the circuit conduction of multiple high-energy gas phase change fracturing devices 2 is achieved through the connection of the third double-pass wire, the second double-pass wire, the first double-pass wire 23, and the double-wire quick-pass cone 61 with the double-wire quick-pass sleeve 51. The trigger 24 in the gas phase change fracturing device triggers the phase change liquid 25 to undergo phase change, generating a large amount of high-temperature and high-pressure gas that is released into the pressure relief pipe body 21, and radially sprayed into the borehole along the energy release hole 211 on the pressure relief pipe body 21, doing work on the target formation, and achieving continuous high-energy gas fracturing and permeability enhancement.

[0058] The high-energy gas phase change fracturing and permeability enhancement device of this embodiment completes the automatic conduction of the circuit at the same time as the mechanical connection of two high-energy gas phase change fracturing devices is completed, and no additional operation is required. The operation is simple, stable, reliable and efficient. Starting from the practical application, the deep hole delivery, connection, conduction reliability, convenience and safety are comprehensively considered, and a complete set of technologies and processes are formed, which specifically and systematically solves the problems of unreliable connection and complex operation of current technologies and processes.

[0059] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make several modifications and improvements without departing from the creative concept of the present invention, which should be included in the protection scope of the present invention.

Claims

1. A high-energy gas phase change cracking and permeability enhancement device, characterized in that: The invention comprises an introduction cone (1), a gas fracturing section and a plugging device (4), wherein the introduction cone (1) is connected to the front end of the gas fracturing section, the gas fracturing section comprises a high-energy gas phase change fracturing device (2) and a connecting pipe, the gas phase change fracturing device and the connecting pipe are connected via a quick connector, the quick connector comprises a first connector (5) and a second connector (6), a double-wire quick-pass sleeve (51) is arranged in the first connector (5), a double-wire quick-pass cone (61) is arranged in the second connector (6), the gas phase change fracturing device and the connecting pipe are connected by double wires through the plugging of the double-wire quick-pass cone (61) and the double-wire quick-pass sleeve (51), and the plugging device (4) is connected to the gas phase change fracturing device or the connecting pipe via the quick connector.

2. A high-energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: The double-wire quick-pass sleeve (51) comprises a central conductive tube (512) and an outer conductive ring (511), wherein the central conductive tube (512) and the outer conductive ring (511) are insulated from each other; the double-wire quick-pass cone (61) comprises an outer conductive column (611) and an inner conductive column (612), wherein the outer conductive column (611) is sleeved on the outer side of the inner conductive column (612) and is spaced apart from the inner conductive column (612); when the double-wire quick-pass sleeve (51) is connected to the double-wire quick-pass cone (61), the inner conductive column (612) is inserted into the central conductive tube, and the outer conductive column (611) is inserted into the outer conductive ring (511).

3. A high-energy gas phase change fracturing and permeability enhancement device according to claim 2, characterized in that: An insulating ring (613) is arranged on the outside of the outer conductive column (611), and the insulating ring (613) is arranged around the outer conductive column (611). When the two-wire quick-pass sleeve (51) is connected to the two-wire quick-pass cone (61), the insulating ring (613) is clamped between the side wall of the first connector (5) and the outer conductive sleeve ring (511).

4. A high-energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: An external thread is provided on the outer side of the first connecting head (5), and an internal thread is provided on the inner side of the second connecting head (6); the first connecting head (5) and the second connecting head (6) are connected by matching the external thread and the internal thread.

5. A high-energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: The first connector (5) and the second connector (6) are respectively provided at both ends of the high-energy gas phase change fracturing device (2). The high-energy gas phase change fracturing device (2) comprises a phase change tube body (22) and a pressure relief tube body (21). The pressure relief tube body (21) is connected to the front end of the phase change tube body (22). A plurality of energy relief holes (211) are provided on the tube wall of the phase change tube body (22). A first double-pass wire (23), a trigger (24) and a phase change liquid (25) are provided in the phase change tube body (22). The first double-pass wire (23) and the phase change liquid (25) are provided on the axis of the phase change tube body (22). The trigger (24) is connected to the double-wire quick-pass cone (61) and the double-wire quick-pass sleeve (51) at both ends of the high-energy gas phase change fracturing device (2) through the first double-pass wire (23).

6. A high-energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: The first connector (5) and the second connector (6) are respectively arranged at both ends of the connecting tube. The connecting tube comprises a connecting tube body (31). A second double-pass wire (32) is arranged in the connecting tube body (31) along its axial direction. The two ends of the second double-pass wire (32) are respectively connected to the double-wire quick-pass cone (61) and the double-wire quick-pass sleeve (51) located at the two ends of the connecting tube.

7. A high-energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: The occluder (4) comprises an occluding tube body (41) and a high-pressure airbag (42), wherein the high-pressure airbag (42) is sleeved around the occluding tube body (41), the front end of the occluding tube body (41) is connected to the first connector (5) or the second connector (6), and the rear end of the occluding tube body (41) is connected to a gas injection interface (43) and a quick-connection interface (44), wherein the quick-connection interface (44) is connected to the double-wire quick-connection cone (61) or the double-wire quick-connection sleeve (51) via a third double-connection conductor, and the gas injection interface (43) is connected to the high-pressure airbag (42).

8. A high-energy gas phase change fracturing and permeability enhancement device according to claim 7, characterized in that: A plurality of sieve holes (411) are arranged on the front end side wall of the blocking tube body (41), the high-pressure air bag (42) is sleeved on the end of the blocking tube body (41) away from the sieve holes (411), and a pumping interface (45) is also provided at the rear end of the blocking tube body (41), and the pumping interface (45) is communicated with the sieve holes (411).

9. A high-energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: The front end of the guide cone (1) is provided with a conical head (11), and the rear end of the guide cone (1) is provided with an external thread or an internal thread connected to the high-energy gas phase change fracturing device (2) or the connecting pipe.

10. A high energy gas phase change fracturing and permeability enhancement device according to claim 1, characterized in that: The high-energy gas phase change fissioners (2) are provided in M ​​numbers, the connecting pipes are provided in N numbers, and two adjacent high-energy gas phase change fissioners (2) are directly connected or indirectly connected via the connecting pipes.

Images