Disposable hydraulic cave forming device special for lower screen pipe

Abstract

The utility model relates to the technical field of hydraulic cave forming, and discloses a special disposable hydraulic cave forming device for a lower screen pipe, which comprises a shell, a first connecting end and a second connecting end, the first connecting end and the second connecting end are respectively and fixedly connected to two ends of the shell, and a valve body outer core is arranged on the inner wall of the shell in a sliding manner; an opening is formed in the inner wall of the valve body outer core, a water jet nozzle is fixedly connected to the position, located on the inner wall of the opening, of the shell, a spring is fixedly connected to the inner wall of the valve body outer core, and a valve body inner core is fixedly connected to the end of the spring. The first throwing ball is thrown into the shell, the first throwing ball is pushed by high-pressure water flow to enter the interior of the valve body outer core through the shell and slides through the valve body inner core to be arranged at the end of the valve body outer core in a pressed mode, and at the moment, the high-pressure water flow cannot penetrate through the valve body outer core, changes the flowing direction and is sprayed out through the water jet nozzle; and hydraulic cave forming at the designated position is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic hole making, especially relates to a disposable hydraulic hole making device special for lower screen pipe. BACKGROUND

[0002] At present, in the operation of lowering the screen pipe after the hydraulic hole making in the well, it is necessary to withdraw all the drill rods from the borehole first. This process takes a long time, especially in the case of deep well or long borehole, the disassembly and reinstallation of the drill rod will consume a lot of time and manpower. With the increasing intensity of the mining operation in the well, the demand for improving the operation efficiency is increasingly urgent. This traditional method of withdrawing the drill rod first and then lowering the screen pipe has become the bottleneck restricting the improvement of the efficiency of the whole mining process. Meanwhile, the repeated disassembly and installation operation of the drill rod increases the complexity of the operation in the well. Each disassembly and installation needs accurate operation to prevent the drill rod from being damaged or improperly connected, which requires higher skills of the operator. The complex operation process is also prone to human errors, increasing the risk of accidents in the well, such as drill rod falling and equipment damage. SUMMARY

[0003] The utility model aims at solving the prior art's problem and provides a disposable hydraulic hole making device special for lower screen pipe.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A disposable hydraulic hole making device special for lower screen pipe, comprising a shell, a first connecting end and a second connecting end, the first connecting end and the second connecting end are fixedly connected at both ends of the shell respectively, a valve body outer core is slidably arranged on the inner wall of the shell, an opening is formed in the inner wall of the valve body outer core, a water jet nozzle is fixedly connected to the inner wall of the shell at the opening, a spring is fixedly connected to the inner wall of the valve body outer core, a valve body inner core is fixedly connected to the end of the spring, the valve body inner core is slidably arranged on the inner wall of the valve body outer core, a plurality of openings are formed around the side wall of the valve body outer core, a limiting ball is arranged on the inner wall of the valve body outer core at each opening, an annular clamping groove is formed in the inner wall of the shell, the limiting balls are clamped on the inner wall of the annular clamping groove respectively, a first throwing ball is clamped on the inner wall of the valve body outer core, and a second throwing ball is arranged on the outer side of the valve body outer core.

[0006] Preferably, the end of the valve body inner core away from the spring is arranged as an arc surface matched with the second throwing ball, and the first throwing ball is slidably arranged on the inner wall of the valve body inner core.

[0007] Preferably, an annular groove is formed in the inner wall of the valve body outer core, a stop ring is fixedly connected to the inner wall of the valve body outer core at the annular groove, and the inner wall of the stop ring extends to the inside of the valve body outer core.

[0008] Preferably, an annular receiving groove is formed in the side wall of the valve body inner core, one side inner wall of the annular receiving groove is provided as an inclined surface, a rubber ring is fixedly sleeved on the side wall of the valve body inner core, and the side wall of the rubber ring is attached to the inner wall of the valve body outer core.

[0009] Preferably, a first sealing ring and a second sealing ring are respectively sleeved on the side wall of the valve body outer core, and the side walls of the first sealing ring and the second sealing ring are respectively attached to the inner wall of the shell.

[0010] Preferably, the first connecting end and the side wall of the valve body outer core are respectively provided with threaded grooves.

[0011] Compared with the prior art, the utility model provides a disposable hydraulic hole forming device special for a lower screen pipe, which has the following beneficial effects:

[0012] 1、the disposable hydraulic hole forming device special for a lower screen pipe, through first ball is put to the inside of shell, first ball is put through the high pressure water flow is pushed and is entered to the inside of valve body outer core through shell and is slipped through valve body inner core and is pressed tightly in the end part of valve body outer core, at this time, the high pressure water flow cannot penetrate the valve body outer core and will change the flow direction and be sprayed through the water jet nozzle, and the hydraulic hole forming at the specified position is completed.

[0013] 2、the disposable hydraulic hole forming device special for a lower screen pipe, through the second ball is put, the second ball is put through the high pressure water flow and is pressed tightly in the end part of valve body inner core, so that the spring is compressed, and the valve body inner core is slid, at this time, the limiting ball will roll to the inside of the limiting receiving groove, so that the valve body outer core lacks limiting treatment, can be pushed by the high pressure water flow and flow out of the shell, can be removed automatically, reduce the time consumption and labor cost of disassembly, can improve the working efficiency of the mining process.

[0014] 3、the disposable hydraulic hole forming device special for a lower screen pipe, through the valve body outer core is put to the inside of shell, the spring can push the valve body inner core and move to the end part of the valve body inner core, and the limiting ball is clamped and arranged on the inner wall of the annular clamping groove through the annular receiving groove outside the valve body inner core, so that the valve body inner core can be automatically installed and arranged in the inside of the shell.

[0015] 4、the disposable hydraulic hole forming device special for a lower screen pipe, through the rubber ring, the tightness of the valve body inner core in the inside of the valve body outer core can be improved, and a certain resistance can be improved, so that when the valve body outer core needs to be clamped and arranged in the shell, the valve body inner core is affected by the high pressure water flow and deviates, affecting the stability of the valve body outer core installation, and the first sealing ring and the second sealing ring can improve the sealing property, so that the high pressure water flow can stably flow out through the water jet nozzle, and the hydraulic hole forming effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1The utility model provides a structure schematic view of a disposable hydraulic hole forming device special for a lower screen pipe.

[0017] Figure 2 The utility model provides a structure sectional view of a disposable hydraulic hole forming device special for a lower screen pipe.

[0018] Figure 3 The utility model provides a structure explosion schematic view of a disposable hydraulic hole forming device special for a lower screen pipe.

[0019] Figure 4 For Figure 2 The structure enlarged schematic view of the partial A part.

[0020] In the drawing: 1 shell, 2 first connecting end, 3 second connecting end, 4 valve body outer core, 5 water cutter nozzle, 6 spring, 7 valve body inner core, 8 limit ball, 9 first ball, 10 second ball, 11 baffle ring, 12 rubber ring, 13 first sealing ring, 14 second sealing ring. Specific implementation

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0022] Referring to Figures 1-4 A disposable hydraulic hole forming device special for a lower screen pipe, including shell 1, first connecting end 2 and second connecting end 3, first connecting end 2 and second connecting end 3 are fixedly connected at both ends of shell 1 respectively, the inner wall of shell 1 is slidably provided with valve body outer core 4, the sidewall of first connecting end 2 and valve body outer core 4 is respectively provided with a threaded groove, the inner wall of valve body outer core 4 is provided with an opening, the inner wall of shell 1 is fixedly connected with water cutter nozzle 5 at the opening, the inner wall of valve body outer core 4 is fixedly connected with spring 6, the end of spring 6 is fixedly connected with valve body inner core 7, valve body inner core 7 is slidably arranged on the inner wall of valve body outer core 4, the sidewall of valve body outer core 4 is surrounded and provided with a plurality of openings, the inner wall of valve body outer core 4 at the plurality of openings is respectively provided with limit ball 8, the inner wall of shell 1 is provided with annular clamping groove, a plurality of limit balls 8 are clamped and arranged on the inner wall of annular clamping groove, the inner wall of valve body outer core 4 is clamped with first ball 9, the outer side of valve body outer core 4 is provided with second ball 10.

[0023] The end of valve body inner core 7 away from spring 6 is provided as the arc surface matched with second ball 10, first ball 9 is slidably arranged on the inner wall of valve body inner core 7, the inner wall of valve body outer core 4 is provided with annular recess, valve body outer core 4 is fixedly connected with baffle ring 11 at the inner wall of annular recess, the inner wall of baffle ring 11 extends to the inside of valve body outer core 4, the sidewall of valve body inner core 7 is provided with annular receiving groove, the inner wall of one side of annular receiving groove is provided as inclined surface.

[0024] In use, the shell 1, the first connecting end 2 and the second connecting end 3 can transport high-pressure water to ensure normal drilling processing, and the valve body outer core 4 is placed in the shell 1, the spring 6 can push the valve body inner core 7 to move to the end of the valve body inner core 4, and the limiting ball 8 is clamped and arranged on the inner wall of the annular clamping groove through the annular receiving groove outside the valve body inner core 7, so that the valve body inner core 4 is automatically installed in the shell 1, and the spring 6 is arranged inside the valve body inner core 7. The high-pressure water flow passing through the valve body inner core 7 will flow through the spring 6, which will not cause compression and extrusion to the spring 6, and can prevent the high-pressure water flow from extruding the spring 6 and deforming to affect use.

[0025] When normal drilling is performed to a specified depth, the first ball 9 is placed in the shell 1, the first ball 9 is pushed by the high-pressure water flow, enters the inside of the valve body outer core 4 through the shell, and slides through the valve body inner core 7 and is tightly arranged at the end of the valve body outer core 4. At this time, the high-pressure water flow cannot penetrate the valve body outer core 4 and will change the flow direction and be sprayed out through the water jet nozzle 5, and the hydraulic hole forming at the specified position is completed.

[0026] When subsequent hydraulic hole forming is completed, the second ball 10 is placed, the second ball 10 is tightly arranged at the end of the valve body inner core 7 by the pushing of the high-pressure water flow, the spring 6 is compressed, the valve body inner core 7 can slide, and at this time the limiting ball 8 will roll into the inside of the limiting receiving groove, the valve body outer core 4 can lack limiting processing, and thus can be pushed by the high-pressure water flow and flow out of the shell 1, and can be automatically removed, thereby reducing the time consumption and labor cost of disassembly, and improving the working efficiency of the mining process.

[0027] In order to ensure the effect of hydraulic hole forming, as shown in Figures 1-4 The side wall of the valve body inner core 7 is fixedly sleeved with a rubber ring 12, the side wall of the rubber ring 12 is abutted and arranged on the inner wall of the valve body outer core 4, the side wall of the valve body outer core 4 is sleeved with a first sealing ring 13 and a second sealing ring 14, respectively, and the side walls of the first sealing ring 13 and the second sealing ring 14 are abutted and arranged on the inner wall of the shell 1.

[0028] The rubber ring 12 can improve the tightness of the valve body inner core 7 inside the valve body outer core 4, and can also improve the resistance, so that when the valve body outer core 4 needs to be clamped and arranged in the shell, the valve body inner core 7 is prevented from being deviated by the high-pressure water flow, and the stability of the installation of the valve body outer core 4 is affected.

[0029] The first sealing ring 13 and the second sealing ring 14 can improve the sealing property, so that the high-pressure water flow can stably flow out through the water jet nozzle 5, and the effect of hydraulic hole forming is ensured.

[0030] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A disposable hydrodynamic cavitation device for a lower sieve pipe, comprising a housing (1), a first connecting end (2) and a second connecting end (3), characterized in that: The first connecting end (2) and the second connecting end (3) are fixedly connected at both ends of the shell (1), the inner wall of the shell (1) is slidably provided with a valve body outer core (4), the inner wall of the valve body outer core (4) is provided with an opening, the inner wall of the shell (1) at the opening is fixedly connected with a water jet nozzle (5), the inner wall of the valve body outer core (4) is fixedly connected with a spring (6), the end of the spring (6) is fixedly connected with a valve body inner core (7), the valve body inner core (7) is slidably arranged on the inner wall of the valve body outer core (4), the side wall of the valve body outer core (4) is surrounded by a plurality of openings, the inner wall of the valve body outer core (4) at the plurality of openings is respectively provided with a limiting ball (8), the inner wall of the shell (1) is provided with an annular clamping groove, the plurality of limiting balls (8) are respectively clamped on the inner wall of the annular clamping groove, the inner wall of the valve body outer core (4) is clamped with a first ball (9), the outer side of the valve body outer core (4) is provided with a second ball (10).

2. A disposable hydrodynamic cavitation device for a sieve tube according to claim 1, characterized in that: The end of the valve body inner core (7) away from the spring (6) is provided with an arc surface matched with the second ball (10), and the first ball (9) is slidably arranged on the inner wall of the valve body inner core (7).

3. A disposable hydrodynamic cavitation device for a sieve tube according to claim 1, characterized in that: The inner wall of the valve body outer core (4) is provided with an annular groove, the valve body outer core (4) is fixedly connected with a retaining ring (11) on the inner wall of the annular groove, and the inner wall of the retaining ring (11) extends to the inside of the valve body outer core (4).

4. A down-the-hole disposable hydro- jetting device for use in a screen pipe according to claim 1, characterized in that: An annular receiving groove is formed in the side wall of the valve body inner core (7), one side wall of the annular receiving groove is provided with an inclined surface, a rubber ring (12) is fixedly sleeved on the side wall of the valve body inner core (7), and the side wall of the rubber ring (12) is attached to the inner wall of the valve body outer core (4).

5. A disposable hydrodynamic cavitation device for a sieve tube according to claim 1, characterized in that: The side wall of the valve body outer core (4) is respectively sleeved with a first sealing ring (13) and a second sealing ring (14), and the side walls of the first sealing ring (13) and the second sealing ring (14) are respectively attached to the inner wall of the shell (1).

6. A down-the-hole disposable hydro- jetting device for use in a screen pipe according to claim 1, characterized in that: The side walls of the first connecting end (2) and the valve body outer core (4) are respectively provided with threaded grooves.

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