Hydraulic sand blasting and perforating integrated device for coal rock stratum

Abstract

The invention discloses a hydraulic sand blasting and perforating integrated device for a coal rock stratum, and relates to the field of coal rock stratum mining equipment.The hydraulic sand blasting and perforating integrated device comprises a positioning cylinder, a fixing mechanism is arranged in the positioning cylinder, the fixing mechanism comprises a first threaded rod rotationally connected to the inner wall of the positioning cylinder, and the outer surface of the first threaded rod is in threaded connection with a threaded block; and the outer surface of the threaded block is fixedly connected with a group of fixed seats. According to the hydraulic sand blasting and perforating integrated device for the coal rock stratum, through cooperative arrangement of a positioning cylinder, a first forward and reverse rotation motor and a first guide rod, the device can be effectively positioned and fixed after being placed on a coal seam; therefore, the situation that the sand blasting perforation position deviates due to instability of the sand blasting perforation device is effectively avoided, the precision of the sand blasting perforation of the coal seam is further guaranteed, and meanwhile the problem that great potential safety hazards are brought to the life of workers due to collapse of the coal seam in a severe case is solved.

Description

Technical Field

[0001] The invention relates to the technical field of coal and rock stratum mining equipment, in particular to a hydraulic sandblasting and perforating integrated device for coal and rock strata. Background Art

[0002] The integrated hydraulic sandblasting and perforating device for coal-rock strata is a device used for coal-bed methane or coal-bed water injection mining. It combines the two technologies of hydraulic sandblasting and perforating to achieve the sandblasting and perforating operations of coal-rock strata in one set of equipment. It mainly includes two parts: a hydraulic sandblasting system and a perforating system. The hydraulic sandblasting system uses high-pressure water jets to flush the coal-rock strata to achieve the effect of crushing and dissolving, thereby improving the permeability of coal-bed methane or coal-bed water injection. The perforating system uses a shot gun or other forms of perforating tools to form channels in the flushed coal-rock strata to facilitate the extraction or injection of coal-bed methane or water.

[0003] In the process of coal seam mining, especially when performing sandblasting and perforating operations, workers are usually required to perform simulation calculations in advance to determine the specific locations of the coal seam where sandblasting and perforating are required. However, in the existing technology, there is usually no positioning function for the device. This may cause the position of the sandblasting and perforating to shift due to its instability when the device is used for sandblasting and perforating operations, thereby affecting the accuracy of sandblasting and perforating the coal seam. In severe cases, it may even cause the coal seam to collapse, thus posing a great safety hazard to the lives of the workers. To this end, we provide an integrated hydraulic sandblasting and perforating device for coal and rock formations to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide an integrated hydraulic sandblasting and perforating device for coal and rock formations, thereby solving the problem that the existing integrated hydraulic sandblasting and perforating device has no positioning function after being placed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an integrated hydraulic sandblasting perforating device for coal and rock formations, comprising a positioning cylinder, wherein a fixing mechanism is arranged inside the positioning cylinder, wherein the fixing mechanism comprises a threaded rod 1 rotatably connected to the inner wall of the positioning cylinder, wherein the outer surface of the threaded rod 1 is threadedly connected to a threaded block, and the outer surface of the threaded block is fixedly connected to a group of fixing seats; The inner wall of each fixed seat is rotatably connected to a group of driving rods, the inner wall of each group of driving rods is fixedly connected to a connecting column 1, the outer surface of each connecting column 1 is rotatably connected to a limiting claw, the inner wall of each limiting claw is fixedly connected to a connecting column 2, and each connecting column 2 is rotatably connected to the inner wall of the positioning cylinder.

[0006] Furthermore, a forward and reverse motor 1 is installed on the inner wall of the positioning cylinder, and the output end of the forward and reverse motor 1 is fixedly connected to a threaded rod 1.

[0007] By adopting the above technical solution, the forward and reverse motor 1 belongs to the existing technology, and the threaded rod 1 can be driven to rotate forward or reverse by starting the forward and reverse motor 1.

[0008] Furthermore, a symmetrical guide rod 1 is fixedly connected to the inner wall of the positioning cylinder, and the two guide rods 1 both penetrate the threaded rod 1 and are slidably connected to the threaded rod 1.

[0009] By adopting the above technical solution, the threaded rod 1 can slide on the outer surface of the guide rod 1 with small friction resistance, and the guide rod 1 can serve as a limit guide for the threaded rod.

[0010] Furthermore, the outer surface of the positioning cylinder is fixedly connected to a battery outer protective shell, and the battery outer protective shell is electrically connected to a forward and reverse motor through a wire.

[0011] By adopting the above technical solution, a rechargeable battery is installed inside the battery outer protective shell. By using a wire to electrically connect the forward and reverse motor 1 with the battery inside the battery outer protective shell, power supply can be provided for the forward and reverse motor 1.

[0012] Furthermore, an adjustment cylinder 1 is fixedly connected to the outer surface of the battery outer protective shell, a forward and reverse motor 2 is installed on the inner wall of the adjustment cylinder 1, and the battery outer protective shell is electrically connected to the forward and reverse motor 2 through a wire.

[0013] By adopting the above technical solution, by using a wire to electrically connect the forward and reverse motor 2 with the battery inside the battery outer protective shell, it is possible to provide power supply for the forward and reverse motor 2.

[0014] Furthermore, the output end of the second forward and reverse motor is fixedly connected with a second threaded rod, the outer surface of the second threaded rod is threadedly connected with a second adjustment cylinder, and the second adjustment cylinder is slidably connected to the inner wall of the first adjustment cylinder.

[0015] By adopting the above technical solution, the forward and reverse motor 2 belongs to the existing technology, and the threaded rod 2 can be driven to rotate forward or reverse by starting the forward and reverse motor 2.

[0016] Furthermore, four guide rods 2 are fixedly connected to the inner wall of the adjusting cylinder 1, and the four guide rods 2 all extend into the interior of the adjusting cylinder 2 and are slidably connected to the adjusting cylinder 2.

[0017] By adopting the above technical solution, the guide rod 2 can play a limiting and guiding role on the adjustment tube 2, so that as the threaded rod 2 rotates, the adjustment tube 2 can be driven to move forward or backward, thereby achieving fine adjustment of the sandblasting perforation position.

[0018] Furthermore, an electronic positioner is fixedly connected to the outer surface of the adjusting cylinder 2, and a guide head is installed on the outer surface of the electronic positioner.

[0019] By adopting the above technical solution, the guide head belongs to the existing technology, and the guide head can play a guiding role for the device.

[0020] Furthermore, a packer is installed on the outer surface of the positioning tube, a hydraulic ejector is fixedly connected to the outer surface of the packer, a centralizer is installed on the outer surface of the hydraulic ejector, and a continuous oil pipe joint is fixedly connected to the outer surface of the centralizer.

[0021] By adopting the above technical solution, the packer belongs to the existing technology and is mainly a downhole tool used to isolate the annular space between the oil pipe and the oil and gas well casing or the open hole wall.

[0022] Furthermore, a mounting plate is fixedly connected to the outer surface of the continuous oil pipe joint, and a group of mounting holes are opened on the outer surface of the mounting plate.

[0023] By adopting the above technical solution and providing mounting holes, people can use screws for installation, which is a relatively convenient device.

[0024] Compared with the prior art, the integrated hydraulic sandblasting and perforating device for coal and rock formations has the following beneficial effects: 1. The present invention can effectively position and fix the device after it is placed in the coal seam through the coordinated arrangement of the positioning cylinder, the fixing mechanism, the forward and reverse motor 1 and the guide rod 1, thereby effectively avoiding the situation where the sandblasting and perforating position is offset due to its instability, further ensuring the accuracy of the sandblasting and perforating of the coal seam, and avoiding the problem of great safety hazards to the lives of workers due to coal seam collapse in serious cases.

[0025] 2. The present invention, through the coordinated arrangement among the adjusting cylinder 1, the forward and reverse motor 2, the threaded rod 2, the adjusting cylinder 2 and the guide rod 2, can enable the staff to fine-tune the position of the device after it is placed in the coal seam. By starting the forward and reverse motor 2, the threaded rod 2 can be driven to rotate, and under the coordinated and restricted action of the guide rod 2, the adjusting cylinder 2 can be driven to slide inside or outside the adjusting cylinder 1. With the movement of the adjusting cylinder 2, the position of the electronic locator and the guide head can be driven to move, thereby realizing the fine-tuning of the position of the device after placement.

[0026] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic front view of the three-dimensional structure of the present invention; Figure 2 It is a schematic side view of the three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the partial structure of the present invention; Figure 4 It is a schematic diagram of the installation structure of the electronic positioner and the guide head of the present invention; Figure 5 This is a schematic diagram of the internal structure of the regulating cylinder 1 of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the fixing mechanism of the present invention; Figure 7 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 8 For the present invention Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0028] In the figure: 1. Positioning cylinder; 2. Fixing mechanism; 201. Threaded rod 1; 202. Threaded block; 203. Fixing seat; 204. Driving rod; 205. Connecting column 1; 206. Limiting claw; 207. Connecting column 2; 3. One forward and reverse motor; 4. One guide rod; 5. Battery outer protective shell; 6. One adjustment cylinder; 7. Two forward and reverse motors; 8. Threaded rod 2; 9. Adjustment cylinder 2; 10. Guide rod 2; 11. Electronic positioner; 12. Guide head; 13. Packer; 14. Hydraulic ejector; 15. Centralizer; 16. Continuous tubing joint; 17. Mounting plate; 18. Mounting hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-8The present invention provides a technical solution: an integrated hydraulic sandblasting perforating device for coal and rock formations, comprising a positioning cylinder 1, a fixing mechanism 2 is arranged inside the positioning cylinder 1, the fixing mechanism 2 comprises a threaded rod 201 rotatably connected to the inner wall of the positioning cylinder 1, a threaded block 202 is threadedly connected to the outer surface of the threaded rod 201, and a group of fixing seats 203 are fixedly connected to the outer surface of the threaded block 202; The inner wall of each fixed seat 203 is rotatably connected to a group of driving rods 204, the inner wall of each group of driving rods 204 is fixedly connected to a connecting column 1 205, the outer surface of each connecting column 1 205 is rotatably connected to a limiting claw 206, the inner wall of each limiting claw 206 is fixedly connected to a connecting column 2 207, and each connecting column 207 is rotatably connected to the inner wall of the positioning cylinder 1.

[0031] A forward and reverse motor 3 is installed on the inner wall of the positioning cylinder 1. The output end of the forward and reverse motor 3 is fixedly connected to the threaded rod 201. The forward and reverse motor 3 belongs to the existing technology. By starting the forward and reverse motor 3, the threaded rod 201 can be driven to rotate forward or reverse.

[0032] The inner wall of the positioning cylinder 1 is fixedly connected with symmetrical guide rods 4. Both guide rods 4 penetrate the threaded rod 201 and are slidably connected to the threaded rod 201. The threaded rod 201 can slide on the outer surface of the guide rod 4 with little friction resistance. The guide rod 4 can play a role of limiting and guiding the threaded rod 201.

[0033] The outer surface of the positioning cylinder 1 is fixedly connected to a battery outer protective shell 5, which is electrically connected to a forward and reverse motor 3 through a wire. A rechargeable battery is installed inside the battery outer protective shell 5. By using a wire to electrically connect the forward and reverse motor 3 with the battery inside the battery outer protective shell 5, power supply can be provided to the forward and reverse motor 3.

[0034] The outer surface of the battery outer protective shell 5 is fixedly connected with an adjustment cylinder 6, and the inner wall of the adjustment cylinder 6 is installed with a forward and reverse motor 2 7. The battery outer protective shell 5 is electrically connected to the forward and reverse motor 2 7 through a wire. By using a wire to electrically connect the forward and reverse motor 2 7 with the battery inside the battery outer protective shell 5, power supply can be provided to the forward and reverse motor 2 7.

[0035] The output end of the forward and reverse motor 27 is fixedly connected to a threaded rod 28, the outer surface of the threaded rod 28 is threadedly connected to an adjusting cylinder 29, and the adjusting cylinder 29 is slidably connected to the inner wall of the adjusting cylinder 1 6. The forward and reverse motor 27 belongs to the prior art, and the threaded rod 28 can be driven to rotate forward or reverse by starting the forward and reverse motor 27.

[0036] Four guide rods 2 10 are fixedly connected to the inner wall of the adjusting cylinder 1 6. The four guide rods 2 10 all extend into the interior of the adjusting cylinder 2 9 and are slidably connected to the adjusting cylinder 2 9. The guide rods 2 10 can play a limiting and guiding role for the adjusting cylinder 2 9, so that the adjusting cylinder 2 9 can be driven to move forward or backward with the rotation of the threaded rod 2 8, thereby achieving fine-tuning of the sandblasting perforation position.

[0037] The outer surface of the adjusting cylinder 2 9 is fixedly connected with an electronic positioner 11, and the outer surface of the electronic positioner 11 is installed with a guide head 12, which belongs to the prior art and can guide the device.

[0038] A packer 13 is installed on the outer surface of the positioning tube 1, and a hydraulic ejector 14 is fixedly connected to the outer surface of the packer 13. A centralizer 15 is installed on the outer surface of the hydraulic ejector 14, and a continuous oil pipe joint 16 is fixedly connected to the outer surface of the centralizer 15. The packer 13 belongs to the prior art and is mainly a downhole tool used to isolate the annular space between the oil pipe and the casing of the oil and gas well or the wall of the open hole.

[0039] The outer surface of the continuous oil pipe joint 16 is fixedly connected with a mounting plate 17, and the outer surface of the mounting plate 17 is provided with a group of mounting holes 18. By providing the mounting holes 18, people can use screws to install the device more conveniently.

[0040] Working principle: by starting the guide head 12, after the device is placed inside the coal seam, the device can be guided to the specified position under the starting action of the guide head 12, and then by starting the forward and reverse motor 27, the threaded rod 28 can be driven to rotate, and under the cooperation and restriction of the guide rod 210, the adjusting cylinder 29 can be driven to slide inside or outside the adjusting cylinder 6, and with the movement of the adjusting cylinder 29, the position of the electronic positioner 11 and the guide head 12 can be driven to move, thereby realizing the fine adjustment of the position of the device after placement. After the adjustment is completed, when the device needs to be fixed, people only need to start the forward and reverse motor 3. With the starting of the forward and reverse motor 3, the threaded rod 201 can be driven to rotate, and with the rotation of the threaded rod 201, and Under the limiting action of the guide rod 4, the threaded block 202 can be driven to move, and the movement of the threaded block 202 can drive the movement of the fixed seat 203, and the movement of the fixed seat 203 can drive the driving rod 204 to rotate. Through the rotation of the driving rod 204, under the supporting action of the connecting column 207 and the connecting action of the connecting column 1 205, the limiting claw 206 can be driven to expand until the limiting claw 206 is inserted into the coal seam, thereby realizing the positioning and fixation of the device after it is placed, thereby effectively avoiding the deviation of the sandblasting perforation position due to its instability, further ensuring the accuracy of the sandblasting perforation of the coal seam, and avoiding the problem of great safety hazards to the lives of workers due to coal seam collapse in serious cases.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An integrated hydraulic sandblasting and perforating device for coal and rock formations, comprising a positioning cylinder (1), characterized in that: A fixing mechanism (2) is provided inside the positioning cylinder (1), the fixing mechanism (2) comprising a threaded rod (201) rotatably connected to the inner wall of the positioning cylinder (1), a threaded block (202) being threadedly connected to the outer surface of the threaded rod (201), and a group of fixing seats (203) being fixedly connected to the outer surface of the threaded block (202); The inner wall of each fixed seat (203) is rotatably connected to a group of driving rods (204), the inner wall of each group of driving rods (204) is fixedly connected to a connecting column 1 (205), the outer surface of each connecting column 1 (205) is rotatably connected to a limiting claw (206), the inner wall of each limiting claw (206) is fixedly connected to a connecting column 2 (207), and each connecting column 2 (207) is rotatably connected to the inner wall of the positioning cylinder (1).

2. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 1 is characterized in that: A forward and reverse motor 1 (3) is installed on the inner wall of the positioning cylinder (1), and the output end of the forward and reverse motor 1 (3) is fixedly connected to a threaded rod 1 (201).

3. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 1 is characterized in that: The inner wall of the positioning cylinder (1) is fixedly connected to a symmetrical guide rod one (4), and the two guide rods one (4) both penetrate the threaded rod one (201) and are slidably connected to the threaded rod one (201).

4. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 1 is characterized in that: The outer surface of the positioning cylinder (1) is fixedly connected to a battery outer protective shell (5), and the battery outer protective shell (5) is electrically connected to a forward and reverse motor (3) via a wire.

5. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 4 is characterized in that: An adjustment cylinder 1 (6) is fixedly connected to the outer surface of the battery outer protective shell (5), a forward and reverse motor 2 (7) is installed on the inner wall of the adjustment cylinder 1 (6), and the battery outer protective shell (5) is electrically connected to the forward and reverse motor 2 (7) via a wire.

6. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 5, characterized in that: The output end of the forward and reverse motor 2 (7) is fixedly connected with a threaded rod 2 (8), the outer surface of the threaded rod 2 (8) is threadedly connected with an adjustment cylinder 2 (9), and the adjustment cylinder 2 (9) is slidably connected to the inner wall of the adjustment cylinder 1 (6).

7. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 6, characterized in that: Four guide rods 2 (10) are fixedly connected to the inner wall of the adjusting cylinder 1 (6), and the four guide rods 2 (10) all extend into the interior of the adjusting cylinder 2 (9) and are slidably connected to the adjusting cylinder 2 (9).

8. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 7, characterized in that: The outer surface of the second adjustment cylinder (9) is fixedly connected to an electronic positioner (11), and the outer surface of the electronic positioner (11) is installed with a guide head (12).

9. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 1, characterized in that: A packer (13) is installed on the outer surface of the positioning cylinder (1), a hydraulic ejector (14) is fixedly connected to the outer surface of the packer (13), a centralizer (15) is installed on the outer surface of the hydraulic ejector (14), and a continuous oil pipe joint (16) is fixedly connected to the outer surface of the centralizer (15).

10. The integrated hydraulic sandblasting and perforating device for coal and rock formations according to claim 9, characterized in that: The outer surface of the continuous oil pipe joint (16) is fixedly connected to a mounting plate (17), and the outer surface of the mounting plate (17) is provided with a group of mounting holes (18).

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