Reverse forging and milling device with cutter cooling function

Abstract

The utility model provides a reverse forging and milling device with a cutter cooling function, belongs to the field of oil well drilling, and aims to solve the problems that a cutter of an existing forging and milling device can generate heat during forging and milling, the cutter is easy to deform due to heating, the cutter is easy to damage in the forging and milling process, and the service life of the forging and milling device is influenced. A mandrel with a hollow structure is elastically connected to the interior of the shell, a nozzle communicated with the mandrel is arranged at the top of the mandrel, a cooling hole communicated with an inner cavity of the mandrel is further formed in the side wall of the mandrel in a penetrating mode, and the cooling hole faces a cutter of the forging and milling device; according to the utility model, the mandrel is of the hollow structure, and the cooling holes are formed in the mandrel, so that fluid can act on the cutter, the cutter can be cooled in the forging and milling process, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of oil well drilling, and in particular relates to a reverse forging and milling machine with a tool cooling function. Background Art

[0002] During the development of oil and gas fields, when the casing in the wellbore is severely deformed or damaged, it is necessary to cut and mill off the entire section of casing that is severely deformed or damaged using a forging and milling machine to restore normal oil and gas production in the later stage.

[0003] At present, the forging and milling machine mainly includes a mandrel located in the middle of its housing, a tool groove located on its side wall, and a tool hinged in the tool groove. When the tool needs to be unfolded, the mandrel is squeezed by hydraulic pressure to move the mandrel downward. During the movement of the mandrel, the tool in the tool groove is squeezed to rotate outward and then unfold. After unfolding, reverse forging and milling operations can be performed.

[0004] The prior art has the following deficiencies:

[0005] The tool of the forging and milling machine will generate heat during forging and milling, and the tool is easily deformed by heat, making the tool easily damaged during the forging and milling process, affecting the service life of the forging and milling machine. Utility Model Content

[0006] In view of this, the utility model provides a reverse forging and milling machine with a tool cooling function to solve the problem that the tools of the existing forging and milling machines generate heat during forging and milling, the tools are easily deformed by heat, and the tools are easily damaged during the forging and milling process, thus affecting the service life of the forging and milling machine.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A reverse forging and milling machine with a tool cooling function comprises a shell, a core shaft with a hollow structure is elastically connected to the inside of the shell, a nozzle connected to the core shaft is provided on the top of the core shaft, and a cooling hole connected to the inner cavity of the core shaft is also penetrated through the side wall of the core shaft, and the cooling hole faces the tool of the forging and milling machine.

[0009] In this technical solution, it should be noted that during the operation of the forging and milling machine, the ground pump injects the fluid into the shell from top to bottom. After the fluid enters the shell, a part of the pressure acts on the core shaft, causing the core shaft to move downward. After the core shaft moves downward, it squeezes the tool, causing the tool to gradually expand outward. After the tool is expanded, the forging and milling operation can be performed; and the other part of the fluid flows downward from the inside of the core shaft through the nozzle, and flows out from the cooling hole to act on the tool to cool the tool; in summary, in the utility model, by setting the core shaft as a hollow structure and providing a cooling hole on the core shaft, the fluid can act on the tool, so that the tool can be cooled during the forging and milling process, thereby extending the life of the tool.

[0010] Preferably, there is a gap between the nozzle and the inner wall of the shell, and a piston is fixedly sleeved on the core shaft and is slidably connected to the shell, and the piston is located below the nozzle.

[0011] In this technical solution, it should be noted that the diameter of the piston is larger than the diameter of the core shaft, and the piston is used to bear the pressure of the fluid, that is, a part of the fluid acts on the piston through the gap between the nozzle and the shell, so that the piston is pressed to drive the core shaft to move downward.

[0012] Preferably, the core shaft is elastically connected to the shell through a first spring, the first spring is sleeved on the core shaft, one end of the first spring is connected to the bottom of the piston, and the other end is connected to the inner bottom wall of the core shaft.

[0013] In this technical solution, it should be noted that the first spring is provided to assist the core shaft in resetting.

[0014] Preferably, a diverter valve is fixedly connected to the interior of the shell, a diverter hole is penetrated through the diverter valve along its axial direction, and the piston is located below the diverter valve.

[0015] In this technical solution, it should be noted that the fluid acts on the piston through the diverter hole on the diverter valve.

[0016] Preferably, the diverter valve and the piston are connected via a second spring.

[0017] In this technical solution, it should be noted that the second spring is provided to assist the core shaft in resetting.

[0018] Preferably, a sealing ring is provided on the side wall of the piston and fits with the inner wall of the housing.

[0019] In this technical solution, it should be noted that a sealing ring is provided to ensure the sealing between the outer wall of the piston and the inner wall of the housing, an annular groove is provided on the side wall of the piston, and the sealing ring is embedded in the annular groove.

[0020] Preferably, a first mating surface is provided at the bottom of the side wall of the core shaft, and the diameter of the first mating surface gradually decreases from top to bottom; the shell includes a knife groove located on its side wall, a knife is hinged at the knife groove, and a second mating surface mating with the first mating surface is provided on the inner side of the knife, and the second mating surface is inclined and abuts against the first mating surface.

[0021] In this technical solution, it should be noted that the first mating surface is an arc-shaped surface. When the forging and milling machine is not working, its core shaft is fixed in the shell under the action of the first spring and the second spring, and the first mating surface at the bottom of the core shaft is located above the second mating surface of the tool, and the two are separated. When the forging and milling machine is working, after the fluid enters the shell and acts on the piston, it drives the core shaft to descend, the first mating surface moves downward, and gradually squeezes the second mating surface, so that the tool rotates and unfolds outward, and forging and milling work can be performed.

[0022] Preferably, the cooling hole is located above the second mating surface, and the cooling hole is arranged to be inclined downward.

[0023] Preferably, a limiting groove is provided on the side wall of the core shaft, the limiting groove is arranged vertically, and a limiting block is provided on the inner side of the tool, and the limiting block is slidably embedded in the limiting groove.

[0024] In this technical solution, it should be noted that the setting of the limit groove and the limit block can limit the rotation stroke of the tool to prevent the tool from rotating at an excessive angle.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0026] 1. In the utility model, by setting the mandrel as a hollow structure and providing cooling holes on the mandrel, the fluid can act on the tool, so that the tool can be cooled during the forging and milling process, thereby extending the life of the tool;

[0027] 2. In the present invention, the limit groove and the limit block are provided to limit the rotation stroke of the tool, thereby preventing the tool from rotating at an excessive angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the tool of the utility model when it is retracted;

[0030] Figure 2 yes Figure 1 A schematic diagram of a partially cutaway three-dimensional structure;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the tool of the utility model after it is unfolded;

[0032] Figure 4 yes Figure 3 A schematic diagram of a partially cutaway three-dimensional structure.

[0033] Reference numerals

[0034] 10-housing, 11-knife groove, 20-nozzle, 30-core shaft, 31-limiting groove, 32-first matching surface, 33-cooling hole, 40-diverter valve, 41-diverter hole, 42-second spring, 50-piston, 51-sealing ring, 52-first spring, 60-knife, 61-second matching surface, 62-limiting block. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0041] Example 1

[0042] like Figure 1-4 As shown, the embodiment of the utility model discloses a reverse forging and milling machine with the function of cooling a tool 60, including a shell 10, a core shaft 30 with a hollow structure is elastically connected to the inside of the shell 10, a nozzle 20 connected to the core shaft 30 is provided on the top of the core shaft 30, and a cooling hole 33 connected to the inner cavity of the core shaft 30 is also penetrated on the side wall of the core shaft 30, and the cooling hole 33 faces the tool 60 of the forging and milling machine. It should be noted that during the operation of the forging and milling machine, the ground pump injects the fluid into the shell 10 from top to bottom. After the fluid enters the shell 10, a part of the pressure acts on the core shaft 30, causing the core shaft 30 to move downward. After the core shaft 30 moves downward, it squeezes the tool 60, causing the tool 60 to gradually expand outward. After the tool 60 is expanded, the forging and milling operation can be performed; and the other part of the fluid flows downward from the inside of the core shaft 30 through the nozzle 20, and flows out from the cooling hole 33 to act on the tool 60 to cool the tool 60; in summary, in the utility model, by setting the core shaft 30 as a hollow structure and providing a cooling hole (33) on the core shaft 30, the fluid can act on the tool 60, so that the tool 60 can be cooled during the forging and milling process, thereby extending the life of the tool 60.

[0043] like Figure 2 As shown, in this embodiment, there is a gap between the nozzle 20 and the inner wall of the housing 10, and a piston 50 is fixedly sleeved on the core shaft 30 and is slidably connected to the housing 10, and the piston 50 is located below the nozzle 20. It should be noted that the diameter of the piston 50 is greater than the diameter of the core shaft 30, and the piston 50 is used to bear the pressure of the fluid, that is, a part of the fluid acts on the piston 50 through the gap between the nozzle 20 and the housing 10, so that the piston 50 is pressed to drive the core shaft 30 to move downward.

[0044] like Figure 4 As shown, in this embodiment, the mandrel 30 is elastically connected to the housing 10 via a first spring 52, the first spring 52 is sleeved on the mandrel 30, one end of the first spring 52 is connected to the bottom of the piston 50, and the other end is connected to the inner bottom wall of the mandrel 30. It should be noted that the first spring 52 is provided to assist the mandrel 30 in resetting.

[0045] like Figure 4 As shown, in this embodiment, a diverter valve 40 is fixedly connected to the inside of the housing 10, and a diverter hole 41 is provided on the diverter valve 40 along its axial direction, and the piston 50 is located below the diverter valve 40. It should be noted that the fluid acts on the piston 50 through the diverter hole 41 on the diverter valve 40.

[0046] like Figure 4 As shown, in this embodiment, the diverter valve 40 is connected to the piston 50 via a second spring 42. It should be noted that the second spring 42 is used to assist the core shaft 30 in resetting.

[0047] like Figure 4 As shown, in this embodiment, a sealing ring 51 is provided on the side wall of the piston 50 and is in contact with the inner wall of the housing 10. It should be noted that the sealing ring 51 is provided to ensure the sealing between the outer wall of the piston 50 and the inner wall of the housing 10. An annular groove is provided on the side wall of the piston 50, and the sealing ring 51 is embedded in the annular groove.

[0048] Example 2

[0049] like Figure 1-4 As shown, this embodiment is substantially the same as the above embodiment, except that the bottom of the side wall of the mandrel 30 is provided with a first mating surface 32, and the diameter of the first mating surface 32 gradually decreases from top to bottom; the housing 10 includes a knife groove 11 located on the side wall thereof, and a tool 60 is hinged at the knife groove 11, and a second mating surface 61 mating with the first mating surface 32 is provided on the inner side of the tool 60, and the second mating surface 61 is inclined and abuts against the first mating surface 32. It should be noted that the first mating surface 32 is an arc surface, and when the forging and milling machine is not working, the mandrel 30 is fixed in the housing 10 under the action of the first spring 52 and the second spring 42, and the first mating surface 32 at the bottom of the mandrel 30 is located above the second mating surface 61 of the tool 60, and the two are separated, and when the forging and milling machine is working, after the fluid enters the housing 10 and acts on the piston 50, the mandrel 30 is driven to descend, the first mating surface 32 moves downward, and gradually squeezes the second mating surface 61, so that the tool 60 rotates outward and unfolds, and the forging and milling work can be performed.

[0050] like Figure 4 As shown, in this embodiment, the cooling hole 33 is located above the second matching surface 61, and the cooling hole 33 is arranged to be inclined downward.

[0051] like Figure 4 As shown, in this embodiment, a limiting groove 31 is provided on the side wall of the mandrel 30, and the limiting groove 31 is vertically arranged. A limiting block 62 is provided on the inner side of the tool 60, and the limiting block 62 is slidably embedded in the limiting groove 31. It should be noted that the limiting groove 31 and the limiting block 62 can limit the rotation stroke of the tool 60 to prevent the tool 60 from rotating at an excessive angle.

[0052] The principle of the utility model is:

[0053] like Figure 2As shown, in the initial state, the mandrel 30 is fixed in the housing 10 under the action of the first spring 52 and the second spring 42, and the first mating surface 32 at the bottom of the mandrel 30 is located above the second mating surface 61 of the tool 60, and the two are separated. When the forging milling machine is working, after the fluid enters the housing 10 and acts on the piston 50, the mandrel 30 is driven to descend, the first mating surface 32 moves downward, and gradually squeezes the second mating surface 61, so that the tool 60 rotates outward and unfolds. The final state is as shown in FIG. Figure 4 As shown, forging and milling work can be carried out at this time;

[0054] Secondly, a portion of the fluid enters the mandrel 30 through the nozzle 20 , and finally flows out through the cooling hole 33 to act on the tool 60 , so as to cool the tool 60 .

[0055] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0056] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reverse forging and milling machine with tool cooling function, characterized in that: The invention comprises a shell (10), wherein a core shaft (30) having a hollow structure is elastically connected to the inside of the shell (10), a nozzle (20) connected thereto is provided on the core shaft (30), and a cooling hole (33) connected to the inner cavity of the core shaft (30) is also provided through the side wall of the core shaft (30), wherein the cooling hole (33) faces a tool (60) of a forging and milling machine.

2. A reverse forging and milling machine with tool cooling function according to claim 1, characterized in that: There is a gap between the nozzle (20) and the inner wall of the shell (10); a piston (50) which is slidably connected to the shell (10) is fixedly sleeved on the core shaft (30); and the piston (50) is located below the nozzle (20).

3. A reverse forging and milling machine with tool cooling function according to claim 2, characterized in that: The core shaft (30) is elastically connected to the housing (10) via a first spring (52). The first spring (52) is sleeved on the core shaft (30). One end of the first spring (52) is connected to the bottom of the piston (50), and the other end is connected to the inner bottom wall of the core shaft (30).

4. The reverse forging and milling machine with tool cooling function according to claim 2, characterized in that: A diverter valve (40) is fixedly connected to the interior of the housing (10), a diverter hole (41) is provided through the diverter valve (40) along its axial direction, and the piston (50) is located below the diverter valve (40).

5. A reverse forging and milling machine with tool cooling function according to claim 4, characterized in that: The diverter valve (40) and the piston (50) are connected via a second spring (42).

6. The reverse forging and milling machine with tool cooling function according to claim 2, characterized in that: A sealing ring (51) is provided on the side wall of the piston (50) and is in contact with the inner wall of the housing (10).

7. The reverse forging and milling machine with tool cooling function according to claim 1, characterized in that: A first matching surface (32) is provided at the bottom of the side wall of the core shaft (30), and the diameter of the first matching surface (32) gradually decreases from top to bottom; The housing (10) comprises a knife groove (11) located on a side wall thereof, a knife (60) being hingedly connected to the knife groove (11), a second mating surface (61) mating with the first mating surface (32) being provided on the inner side of the knife (60), and the second mating surface (61) being arranged at an angle and abutting against the first mating surface (32).

8. The reverse forging and milling machine with tool cooling function according to claim 7, characterized in that: The cooling hole (33) is located above the second matching surface (61), and the cooling hole (33) is arranged to be inclined downward.

9. The reverse forging and milling machine with tool cooling function according to claim 1, characterized in that: A limiting groove (31) is provided on the side wall of the core shaft (30), and the limiting groove (31) is arranged vertically. A limiting block (62) is provided on the inner side of the tool (60), and the limiting block (62) is slidably embedded in the limiting groove (31).

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