Deep hole fracturing opener
By designing a deep -hole fracturing opening device, the coordination of the arc -shaped bottom and spring to achieve a large flow of high -pressure liquids into the coal seam, solving the problem of limited communication in existing equipment during high -pressure water supply, and improved the coal seam fracture. Efficiency and effect.
Patent Information
- Application Number
- CN202421021246.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-12
- Publication Date
- 2025-01-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When existing coal seam fracturing equipment supplies high-pressure water, the conduction of the check valve is limited, resulting in the need to reduce the pressure during the coal seam fracturing stage to protect the check valve, thereby reducing the efficiency of the coal seam fracturing.
Design a deep -hole fracture opening device, including the lower connection section, the upper connection section, and the middle tube. The middle tube is equipped with permeable holes and sliding covers, and a spring is set on the sliding cover. Through the arc -shaped bottom surface and the bottom surface design, when the hydraulic strength is greater than the spring elasticity of the spring, the high -pressure liquid enters the coal seam through the transmittance holes to achieve efficient fracture of the coal seam.
After the barrier is inflated, the water pressure can be continued, and the high -pressure liquid enters the coal seam at a large flow, improves the efficiency and effect of the coal seam fracture, and avoids the reduction of efficiency caused by limited one -way valve diversion.
Smart Images
Figure CN222414799U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mining accessories, in particular to a deep hole fracturing opener. Background Art
[0002] Among the existing mining accessories, the traditional way to extend the tunnel is to use blasting. However, in the field of coal mining or other fuel ore mining, underground ores are rich in a large amount of flammable and explosive gases, which can easily lead to safety accidents in a blasting environment.
[0003] In order to avoid the above problems, the applicant has designed a barrier according to the principle of liquid expansion. The basic principle is to introduce a fracturing pipe into the deep hole, achieve the blockage of a certain stage inside the pipe through the expansion of the fracturing pipe, and then use high-pressure liquid to pressurize the blocking area, thereby squeezing the coal seam, thereby achieving the fracturing of the coal seam. When the above barrier is in use, its basic structure is usually to set two barriers for matching use, and a fracturing device is set between the two barriers. The structure of this fracturing device is that a one-way valve is set inside, and a hole is set on the outer wall. It is conducted under high pressure through the one-way valve, and the high-pressure liquid supply to the blocking area is achieved through the hole on the side wall, thereby achieving the fracturing of the coal seam.
[0004] The structure of the fracturing device in the prior art is complex, and its conducting device is arranged inside. Its disadvantage is that when this equipment is used for coal seam fracturing, after the high-pressure water supply causes the barrier to expand, the one-way valve is conducted. At this time, since the fluid flow rate of the one-way valve is limited, during fracturing, in order to prevent the one-way valve from being damaged, a moderate pressure reduction is required during the coal seam fracturing stage to reduce the high-pressure impact on the one-way valve. This operation reduces the efficiency of coal seam fracturing. Summary of the invention
[0005] The utility model aims to provide a deep hole fracturing opener, which can realize opening after the blocker is blocked by setting a fracturing opening device, and supply liquid to the coal seam in a large flow state, which can effectively improve the operation efficiency.
[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a deep hole fracturing opener, which includes a lower connecting section and an upper connecting section, a middle tube is arranged between the lower connecting section and the upper connecting section, the middle tube is provided with a liquid permeable hole, a sliding sleeve is arranged outside the liquid permeable hole, and a spring is arranged on the sliding sleeve; a blocking groove is arranged on the lower connecting section, the bottom of the blocking groove is provided with an arc-shaped bottom surface, and a matching bottom surface is arranged on the sliding sleeve to match the arc-shaped bottom surface.
[0007] The upper connecting section is connected to the middle pipe as a whole, and the end of the upper connecting section is provided with an internal thread or an external thread; the lower section is provided with a middle pipe hanging section, and an outer sleeve is provided on the periphery of the middle pipe hanging section, and a spring is provided between the outer sleeve and the sliding sleeve.
[0008] A washer is arranged at the lower part of the outer sleeve, and the washer is clearance-matched with the outer diameter of the middle tube. A spring is arranged between the washer and the sliding sleeve.
[0009] On the sliding sleeve, a sealing ring is arranged on the upper part of the liquid permeable hole, and the sealing between the liquid permeable hole and the sliding sleeve is realized by the sealing ring.
[0010] The liquid permeable holes are arranged in the shape of long grooves, and a plurality of the liquid permeable holes are arranged evenly around the periphery of the middle tube.
[0011] The beneficial effects of the utility model are as follows: the utility model includes a lower connecting section and an upper connecting section, a middle tube is arranged between the lower connecting section and the upper connecting section, a liquid permeable hole is arranged on the middle tube, a sliding sleeve is arranged outside the liquid permeable hole, and a spring is arranged on the sliding sleeve; a blocking groove is arranged on the lower connecting section, an arc-shaped bottom surface is arranged at the bottom of the blocking groove, and a matching bottom surface is arranged on the sliding sleeve to match the arc-shaped bottom surface. After the utility model is arranged with the above structure, when the coal seam is fracturing, after the barrier is pressurized and expanded, the high-pressure liquid enters the arc-shaped bottom surface and squeezes the bottom of the sliding sleeve in the arc-shaped bottom surface. When the hydraulic strength is greater than the spring elastic force, it overcomes the elastic force to compress the spring, and then the high-pressure liquid enters the coal seam at the liquid permeable hole. The utility model can continue to increase the water pressure after the barrier is pressurized and expanded, so that the high-pressure liquid enters the coal seam at a larger flow rate to achieve coal seam fracturing. It has good fracturing effect and high efficiency, and is an ideal deep hole fracturing opener. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0013] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the utility model;
[0014] Figure 3 It is a schematic diagram of the middle pipe installation structure;
[0015] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure of the middle A area;
[0016] Figure 5 It is a schematic diagram of the use state of the utility model;
[0017] Figure numerals: 1. lower connecting section, 11. lower external thread, 12. lower internal thread, 13. arc-shaped bottom surface, 2. sliding sleeve, 21. matching bottom surface, 22. sealing ring, 3. spring, 4. gasket, 5. outer ring, 6. upper connecting section, 61. upper internal thread, 62. blocking step, 7. middle tube, 71. liquid permeable hole, 72. bottom connecting end, 73. upper connecting end, 8. barrier. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings.
[0019] Embodiment 1:
[0020] A deep hole fracturing opener comprises a lower connecting section 1 and an upper connecting section 6. The lower connecting section 1 is a stepped shaft, and a lower external thread 11 and a lower internal thread 12 are arranged on its upper portion. A blocking groove is arranged inside the lower connecting section 1, and an arc-shaped bottom surface 13 is arranged at the bottom of the blocking groove.
[0021] The upper connecting section 6 is provided with an upper internal thread 61 and a blocking step 62, and the lower section of the upper connecting section 6 is provided with a middle tube hanging section. The blocking step 62 is arranged at the diameter change position of the middle tube hanging section, and is connected to the middle tube 7 through the upper internal thread 61. An outer sleeve ring 5 is provided on the periphery of the blocking step 62 for plug-in cooperation, and the gasket 4 is fixed by the outer sleeve ring 5. The gasket 4 is arranged at the lower part of the outer sleeve ring 5, and the gasket is matched with the outer diameter clearance of the middle tube 7.
[0022] According to the above structure, a middle tube 7 is arranged between the lower connecting section 1 and the upper connecting section 6, and the middle tube 7 is provided with a liquid permeable hole 71. The liquid permeable hole 71 is arranged in the shape of a long groove, and multiple liquid permeable holes 71 are arranged evenly around the periphery of the middle tube 7 screen.
[0023] The outer portion of the liquid permeable hole 71 is provided with a sliding sleeve 2, and a spring 3 is fixed between the sliding sleeve 2 and the gasket 4; Figure 2 , 4 As shown, a matching bottom surface 21 is provided at the bottom of the sleeve 2 to match the arc bottom surface 13. The reason why the junction between the bottom of the sleeve 2 and the lower connecting section 1 is designed to be arc-shaped is to achieve liquid diversion and gradually transform the radial thrust of the high-pressure liquid into axial thrust while diverting the liquid.
[0024] After the above structure is set, the utility model can be used as follows: Figure 5As shown, when the coal seam is fracturing, it is arranged between the two sections of the barrier 8. When the pressure is increased from the end to the middle, due to the internal hollow design of the deep hole fracturing opener, the high-pressure liquid can expand the two sections of the barrier 8 and achieve sealing. In this case, when the pressure of the barrier 8 is too high and cannot continue to expand, the internal pressure of the deep hole fracturing opener increases, and the high-pressure liquid enters the arc-shaped bottom surface 13, and squeezes the bottom of the sleeve 2 in the arc-shaped bottom surface 13. When the hydraulic strength is greater than the spring force, it overcomes the elastic force to compress the spring 3, and then the high-pressure liquid enters the coal seam at the liquid permeable hole.
[0025] When the above actions are performed, the sliding of the sliding sleeve 2 is preferably performed in a sealed state, such as Figure 4 As shown, the interior of the sleeve 2 is provided with a fixed groove at the upper part of the liquid permeable hole 71, and a sealing ring 22 is provided in the fixed groove. The sealing ring 22 is used to achieve sealing between the liquid permeable hole 71 or the outer wall of the middle tube 7 and the sleeve 2, which restricts the high-pressure liquid to flow out only at the bottom of the sleeve 2 and cannot flow out at the upper part of the sleeve 2. Through this design, the directional extrusion of the spring by the sleeve 2 can be stably achieved, avoiding the thrust generated by the high-pressure liquid from being reduced during disordered pressure relief. The disordered pressure relief mentioned here is to leak the liquid at the upper part of the sleeve 2.
[0026] The utility model can continue to increase the water pressure after the barrier 8 is pressurized and expanded, so that the high-pressure liquid enters the coal seam through the liquid-permeable hole 71 at a large flow rate to achieve coal seam fracturing. Because its spring is arranged on the outside and is not restricted by the size of the internal aperture, the fracturing effect in the deep hole after receiving the liquid is good and the efficiency is high. It is an ideal deep hole fracturing opener.
Claims
1. A deep hole fracturing opener, characterized in that: It includes a lower connecting section and an upper connecting section, a middle tube is arranged between the lower connecting section and the upper connecting section, the middle tube is provided with a liquid permeable hole, a sliding sleeve is arranged outside the liquid permeable hole, and a spring is arranged on the sliding sleeve; a blocking groove is arranged on the lower connecting section, an arc-shaped bottom surface is arranged at the bottom of the blocking groove, and a matching bottom surface is arranged on the sliding sleeve to match the arc-shaped bottom surface.
2. The deep hole fracturing opener according to claim 1, characterized in that: The upper connecting section is connected to the middle pipe as a whole, and the end of the upper connecting section is provided with an internal thread or an external thread; the lower section is provided with a middle pipe hanging section, and an outer sleeve is provided on the periphery of the middle pipe hanging section, and a spring is provided between the outer sleeve and the sliding sleeve.
3. The deep hole fracturing opener according to claim 2, characterized in that: A gasket is arranged at the lower part of the outer sleeve ring, and the gasket is clearance-matched with the outer diameter of the middle pipe.
4. The deep hole fracturing opener according to claim 1, characterized in that: On the sliding sleeve, a sealing ring is arranged on the upper part of the liquid permeable hole, and the sealing between the liquid permeable hole and the sliding sleeve is realized by the sealing ring.
5. The deep hole fracturing opener according to claim 1, characterized in that: The liquid permeable holes are arranged in the shape of long grooves, and a plurality of the liquid permeable holes are arranged evenly around the periphery of the middle tube.