A carbon dioxide phase change fracturing device with a flight arrester

Abstract

The present invention provides a carbon dioxide phase change fracturing device with a fly stopper, comprising a handle, a fracturing device body, a release head and a fly stopper; one end of the fracturing device body is fixedly connected to the handle, and the other end is fixedly connected to the release head, and the release head is provided with a release hole; the first stopper ring of the fly stopper can be installed on the outer periphery of the handle along the axial movement of the fracturing device body, the second stopper ring is installed on the outer periphery of the fracturing device body, one end of the first connecting rod and one end of the second connecting rod are hinged to form a hinged portion, the first stopper ring is hinged to the other end of the first connecting rod, the second stopper ring is hinged to the other end of the second connecting rod, the abutment gasket is hinged to the hinged portion, the first stopper ring has a displacement relative to the second stopper ring, so that the abutment gasket has an abutment position abutting against the wall of the fracturing hole, and a distance position away from the wall of the fracturing hole. The beneficial effect of the technical solution proposed by the present invention is: the fracturing device is stably fixed in the fracturing hole to prevent the fracturing device from flying out of the fracturing hole.

Description

Technical Field

[0001] The invention relates to the field of rock fracturing device and geotechnical engineering technology, and in particular to a carbon dioxide phase change fracturing device with a flight arrester. Background Art

[0002] With the development of the times, people not only require high efficiency of rock breaking technology, but also the requirements for rock breaking safety are constantly increasing, especially in coal mining and permeability enhancement of high-gas formations. Carbon dioxide phase change fracturing technology uses the high-pressure gas impact force generated by the rapid gasification and expansion of liquid carbon dioxide under the heating of the heating tube to quickly destroy the rock and soil body and achieve the purpose of rock breaking. Carbon dioxide phase change fracturing technology belongs to physical rock breaking technology. In the rock breaking process, except for the heating stage, the entire rock breaking process not only does not have a temperature rise phenomenon like explosive blasting, but has a temperature drop phenomenon. In addition, carbon dioxide is also a flame retardant gas that can displace gas in coal seams. Therefore, the use of this technology in coal mining and high-gas formations can greatly improve the safety of coal mining and rock breaking in high-gas formations.

[0003] At present, when a carbon dioxide phase change fracturator is used to break rock, a hole is drilled first and then the carbon dioxide phase change fracturator is inserted into the fracturing hole. The high-energy carbon dioxide ejected by the carbon dioxide phase change fracturator produces a huge impact reaction force, which can easily cause the fracturator to "fly pipe", which not only reduces the rock breaking efficiency, but also poses a huge safety hazard to the surrounding personnel and machinery. At the same time, the fracturator flying out of the fracturing hole will also be damaged, which is not conducive to reuse, thus affecting the economic benefits. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a carbon dioxide phase change fracturing device with a fly-off stopper, which is intended to stably fix the fracturing device in the fracturing hole and prevent the fracturing device from flying out of the fracturing hole.

[0005] An embodiment of the present invention provides a carbon dioxide phase change fracturing device with a fly stopper, comprising a handle, a fracturing device body, a release head and a fly stopper;

[0006] One end of the fracturing device body is fixedly connected to the handle, and the other end is fixedly connected to the release head. The release head is provided with a release hole and is used to be placed in the fracturing hole so that carbon dioxide gas can be released from the release hole to break the rock.

[0007] The anti-fly device includes a first limiting ring, a second limiting ring and a plurality of abutment structures. The first limiting ring can be movably installed on the outer periphery of the handle along the axial direction of the fracturing device body, and the second limiting ring is installed on the outer periphery of the fracturing device body. The abutment structure includes a first connecting rod, a second connecting rod and an abutment gasket. One end of the first connecting rod and one end of the second connecting rod are hinged to form a hinged portion. The first limiting ring is hinged to the other end of the first connecting rod, and the second limiting ring is hinged to the other end of the second connecting rod. The abutment gasket is hinged to the hinged portion. A plurality of abutment structures are arranged along the circumference of the fracturing device body. The first limiting ring has a displacement relative to the second limiting ring in the axial direction of the fracturing device body to change the curvature of the first connecting rod and the second connecting rod, so that the abutment gasket has an abutment position abutting against the wall of the fracture hole and a distance position away from the wall of the fracture hole.

[0008] Furthermore, a plurality of the abutment structures are evenly distributed in the circumferential direction of the fracturing device body.

[0009] Furthermore, the handle is provided with a pin hole, the pin hole cooperates with the pin, and the pin is used to abut against the first limiting ring to limit the displacement of the first limiting ring in the axial direction of the fracturing device body.

[0010] Furthermore, the handle is provided with a plurality of spaced-apart pin holes extending through the handle in the axial direction of the fracturing device body.

[0011] Furthermore, the second limiting ring can be installed on the fracturing device body so as to be axially movable along the fracturing device body.

[0012] Furthermore, the inner side wall of the second limiting ring is provided with an internal thread, the outer side wall of the fracturing device body is provided with an external thread, and the second limiting ring is threadedly connected to the fracturing device body.

[0013] Further, the release holes include a first release hole, a second release hole and a third release hole, the first release hole and the second release hole are arranged along the diameter direction of the release head, the line connecting the center points of the first release hole and the second release hole and the third release hole is perpendicular to the diameter direction of the release head, and a shear piece is fixed in the third release hole.

[0014] Furthermore, a friction portion is provided on the side of the abutment gasket facing the hole wall.

[0015] The technical solution provided by the embodiment of the present invention has the following beneficial effects: by placing the release head in the fracturing hole, adjusting the relative positions of the first limiting ring and the second limiting ring along the axial direction of the fracturing device body, and moving the first limiting ring in the direction close to the second limiting ring to reduce the distance between the first limiting ring and the second limiting ring, the hinged part of the first connecting rod and the second connecting rod protrudes outward, and the abutment gasket moves from the distant position to the abutment position. When the fracturing device sprays high-energy carbon dioxide, a huge recoil force will be generated. Multiple abutment gaskets abut against the wall of the fracturing hole, thereby providing strong support for resisting the reaction force generated by the spraying of high-pressure carbon dioxide, and the fracturing device can be stably fixed in the fracturing hole to prevent the fracturing device from flying out of the fracturing hole. The anti-flying device is not only simple in structure, low in cost, and easy to replace after damage, but also has high reliability, can play an effective anti-flying role, ensure the safety of personnel and machinery at the construction site, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a carbon dioxide phase change fracturing device with a flight arrester provided by the present invention;

[0017] Figure 2 yes Figure 1 A schematic structural diagram of a carbon dioxide phase change fracturing device with a flight arrester from another perspective;

[0018] Figure 3 yes Figure 1 A top view of the middle rupture device body and the flight arrester.

[0019] In the figure: handle 1, pin hole 11, pin 12, fracture device body 2, release head 3, release hole 31, first release hole 31a, second release hole 31b, third release hole 31c, anti-fly device 4, first limiting ring 41, second limiting ring 42, first connecting rod 43, second connecting rod 44, abutting gasket 45, hinged part 46. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0021] See also Figures 1 to 3 An embodiment of the present invention provides a carbon dioxide phase change fracturing device with a fly stopper, comprising a handle 1, a fracturing device body 2, a release head 3 and a fly stopper 4.

[0022] See also Figure 1 and Figure 2 One end of the fracturing device body 2 is fixedly connected to the handle 1, and the other end is fixedly connected to the release head 3. The release head 3 is provided with a release hole 31 for being placed in the fracturing hole so that carbon dioxide gas can be released from the release hole 31 to break the rock.

[0023] The anti-fly device 4 includes a first limiting ring 41, a second limiting ring 42 and a plurality of abutment structures. The first limiting ring 41 can be installed on the outer periphery of the handle 1 along the axial movement of the fracturing device body 2. The second limiting ring 42 is installed on the outer periphery of the fracturing device body 2. The abutment structure includes a first connecting rod 43, a second connecting rod 44 and an abutment gasket 45. One end of the first connecting rod 43 and one end of the second connecting rod 44 are hinged to form a hinged portion 46. The first limiting ring 41 is hinged to the other end of the first connecting rod 43. The second limiting ring 42 is hinged to the other end of the second connecting rod 44, the abutting gasket 45 is hinged to the hinge portion 46, and a plurality of the abutting structures are arranged along the circumference of the fracturing device body 2. The first limiting ring 41 has a displacement relative to the second limiting ring 42 along the axial direction of the fracturing device body 2 to change the curvature of the first connecting rod 43 and the second connecting rod 44, so that the abutting gasket 45 has an abutting position abutting against the wall of the fracture hole, and a distance position away from the wall of the fracture hole.

[0024] In the technical solution proposed by the present invention, by placing the release head 3 in the fracturing hole, adjusting the relative positions of the first limiting ring 41 and the second limiting ring 42 along the axial direction of the fracturing device body 2, and moving the first limiting ring 41 in the direction close to the second limiting ring 42 to reduce the distance between the first limiting ring 41 and the second limiting ring 42, the hinged portion 46 of the first connecting rod 43 and the second connecting rod 44 protrudes outward, and the abutment gasket 45 moves from the away position to the abutment position. When the fracturing device sprays high-energy carbon dioxide, a huge recoil force is generated, and multiple abutment gaskets 45 abut against the wall of the fracturing hole, thereby providing strong support for resisting the reaction force generated by the spraying of high-pressure carbon dioxide, and the fracturing device can be stably fixed in the fracturing hole to prevent the fracturing device from flying out of the fracturing hole.

[0025] Specifically, the side of the abutting gasket 45 facing the crack hole wall is provided with a friction part, which is specifically dense grooves, which can increase the friction between the abutting gasket 45 and the crack hole wall and further enhance the stability of the fracturing device installed in the crack hole.

[0026] The plurality of abutment structures are evenly distributed around the fracturing device body 2. In this embodiment, three abutment structures are provided. The three-point fixing of the carbon dioxide phase change fracturing device can ensure uniform force and improve the stability of the fracturing device fixed in the fracturing hole.

[0027] Furthermore, the handle 1 is provided with a pin hole 11, and the pin hole 11 cooperates with the pin 12. The pin 12 is used to abut against the first limiting ring 41 to limit the axial displacement of the first limiting ring 41 on the fracturing device body 2. The first limiting ring 41 is moved inward to make the abutting gasket 45 abut against the wall of the fracturing hole. The pin 12 is inserted into the pin hole 11 to make the first limiting ring 41 abut against the pin 12. Since the first limiting ring 41 and the second limiting ring 42 are connected by the first connecting rod 43 and the second connecting rod 44, the first limiting ring 41 is fixed between the pin 12 and the first connecting rod 43. The pin 12 is removed and the first limiting ring 41 is moved outward, thereby driving the first connecting rod 43 and the second connecting rod 44 to rotate, and then driving the abutting gasket 45 to move from the abutting position to the away position, and the fracturing device can be taken out of the fracturing hole. The handle 1 is axially penetrated with a plurality of spaced-apart pin holes 11. By providing a plurality of pin holes 11, the fixed position of the first limiting ring 41 can be adjusted, thereby adjusting the opening of the first connecting rod 43 and the second connecting rod 44, and further adjusting the distance between the abutting gasket 45 and the fracturing device body 2, which can be suitable for fracturing holes of different diameters.

[0028] Furthermore, the second limiting ring 42 can be installed on the fracturing body 2 axially movable along the fracturing body 2, and the position of the second limiting ring 42 on the fracturing body 2 can be adjusted. In this embodiment, the inner side wall of the second limiting ring 42 is provided with an internal thread, and the outer side wall of the fracturing body 2 is provided with an external thread. The second limiting ring 42 is threadedly connected with the fracturing body 2. The position of the second limiting ring 42 can be adjusted by rotating the second limiting ring 42, so that the opening of the first connecting rod 43 and the second connecting rod 44 can be accurately adjusted, and then the distance between the abutting gasket 45 and the fracturing body 2 can be accurately adjusted. At the same time, the installation and disassembly of the second limiting ring 42 is simple, and it is easy to repair and install. The anti-flying device 4 is not only simple in structure, low in cost, and easy to replace after damage, but also has high reliability, can play an effective anti-flying role, ensure the safety of personnel and machinery at the construction site, and improve economic benefits.

[0029] For further information, see Figure 2 The release hole 31 includes a first release hole 31a, a second release hole 31b and a third release hole 31c. The first release hole 31a and the second release hole 31b are arranged along the diameter direction of the release head 3. The line connecting the center points of the first release hole 31a and the second release hole 31b and the third release hole 31c is perpendicular to the diameter direction of the release head 3. A shear piece (not shown in the figure) is fixed in the third release hole 31c. In this embodiment, the shear piece is welded in the third release hole 31c.

[0030] The fracturator is placed in the fracturing hole. When breaking the rock, the high-pressure carbon dioxide gas first breaks through the shear plate in the fracturator body 2, rushes out from the first release hole 31a and the second release hole 31b opposite to each other, and impacts the wall of the fracturing hole, thereby generating a tensile stress on the fracturing hole to break the rock, so that a crack is generated on the wall of the fracturing hole on the line perpendicular to the center of the first release hole 31a and the second release hole 31b. Since the shear plate in the third release hole 31c delays the release of high-pressure carbon dioxide from the third release hole 31c, the high-pressure carbon dioxide gas breaks through the shear plate in the third release hole 31c, and a crack has been generated on the wall of the fracturing hole opposite to the third release hole 31c. Therefore, the rushing high-pressure carbon dioxide gas will act on the crack, giving full play to the gas wedge effect of the high-pressure gas and promoting the expansion of the crack.

[0031] The release head 3 of the existing carbon dioxide phase change fracturing device basically adopts two symmetrically arranged release holes 31. This hole arrangement method fully utilizes the impact force of the high-pressure gas, but the utilization rate of the gas wedge effect of the high-pressure gas is low. The arrangement method of the release holes 31 in the present technical solution can fully utilize the gas wedge effect of the gas to promote the expansion of cracks, thereby improving the energy utilization rate and the rock breaking efficiency.

[0032] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0033] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A carbon dioxide phase change fracturing device with a flight arrester, characterized in that: It includes a handle, a fracturing device body, a release head and a fly arrester; One end of the fracturing device body is fixedly connected to the handle, and the other end is fixedly connected to the release head. The release head is provided with a release hole and is used to be placed in the fracturing hole so that carbon dioxide gas can be released from the release hole to break the rock. The release holes include a first release hole, a second release hole and a third release hole, the first release hole and the second release hole are arranged along the diameter direction of the release head, the center point of the first release hole and the second release hole and the line connecting the third release hole are perpendicular to the diameter direction of the release head, and a shear piece is fixedly provided in the third release hole; The anti-fly device includes a first limiting ring, a second limiting ring and a plurality of abutment structures. The first limiting ring can be installed on the outer periphery of the handle axially movably along the body of the fracturing device, and the second limiting ring is installed on the outer periphery of the body of the fracturing device. The abutment structure includes a first connecting rod, a second connecting rod and an abutment gasket. One end of the first connecting rod and one end of the second connecting rod are hinged to form a hinged portion. The first limiting ring is hinged to the other end of the first connecting rod, and the second limiting ring is hinged to the other end of the second connecting rod. The abutment gasket is hinged to the hinged portion. A plurality of the abutment structures are arranged along the circumference of the body of the fracturing device. The first limiting ring has a displacement relative to the second limiting ring along the axial direction of the body of the fracturing device to change the curvature of the first connecting rod and the second connecting rod, so that the abutment gasket has an abutment position abutting against the wall of the fracturing hole and a distance position away from the wall of the fracturing hole. The plurality of abutment structures are evenly distributed on the circumference of the body of the fracturing device.

2. The carbon dioxide phase change fracturing device with a flight arrester as claimed in claim 1, characterized in that: The handle is provided with a pin hole, the pin hole cooperates with the pin, and the pin is used to abut against the first limiting ring to limit the displacement of the first limiting ring in the axial direction of the fracturing device body.

3. The carbon dioxide phase change fracturing device with a flight arrester as claimed in claim 2, characterized in that: The handle is provided with a plurality of spaced-apart pin holes along the axial direction of the fracturing device body.

4. The carbon dioxide phase change fracturing device with a flight arrester as claimed in claim 3, characterized in that: The second limiting ring is installed on the fracturing device body and can be axially moved along the fracturing device body.

5. The carbon dioxide phase change fracturing device with a flight arrester as claimed in claim 4, characterized in that: The inner side wall of the second limiting ring is provided with an internal thread, the outer side wall of the fracturing device body is provided with an external thread, and the second limiting ring is threadably connected to the fracturing device body.

6. The carbon dioxide phase change fracturing device with a flight arrester as claimed in claim 1, characterized in that: The side surface of the abutting gasket facing the hole wall is provided with a friction portion.

Images