Sleeve deformation milling device

Abstract

The utility model discloses a casing pipe deformation milling device which comprises a casing pipe, a deformation milling device body is arranged in the casing pipe and comprises a first milling cone and a second milling cone, the first milling cone and the second milling cone are coaxially and fixedly connected through a mandrel, the second milling cone is located below the first milling cone, and the first milling cone and the second milling cone are coaxially and fixedly connected through a mandrel. The maximum outer diameter of the second grinding and milling cone is smaller than that of the first grinding and milling cone, a driving rod coaxial with the mandrel is arranged in the sleeve, and the driving rod is fixedly connected with the mandrel through a pushing device. The casing deformation grinding and milling device can effectively grind and mill the deformed part of the casing during use, is beneficial to protecting the grinding and milling cone in the grinding and milling process, prolongs the overall service life, and is suitable for popularization and use.

Description

Technical Field

[0001] The utility model relates to the technical field of brine well casing repair, in particular to a casing deformation grinding and milling device. Background Art

[0002] Salt mine brine wells are approximately 300 meters deep and are typically mined using the water solution method. The salt layer is approximately 80-100 meters thick, with an average interlayer depth of over 10 meters. The bottom of the brine well casing is buried approximately 5 meters above the salt layer floor.

[0003] As the years of mining increase, the salt layer continues to dissolve into the roof, and the casing is prone to bending and deformation. During operation, the casing is also prone to congestion and crystallization, affecting mining construction.

[0004] Therefore, there is an urgent need for a device that can repair the inner wall of the casing by milling to ensure the normal mining and use of the brine well. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a casing deformation grinding and milling device which can effectively perform grinding and milling repair on the deformed parts of the casing, and is beneficial to protecting the grinding and milling cone during the grinding and milling process and improving the overall service life.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a sleeve deformation milling device, comprising a sleeve, a deformation milling device is provided in the sleeve, the deformation milling device comprises a first milling cone and a second milling cone, the first milling cone and the second milling cone are coaxially fixedly connected through a core shaft, the second milling cone is located below the first milling cone, and the maximum outer diameter of the second milling cone is smaller than the maximum outer diameter of the first milling cone, a driving rod coaxially set with the core shaft is provided in the sleeve, and the driving rod is fixedly connected to the core shaft through a pushing device.

[0007] Preferably, the circumference of the first milling cone is provided with a spiral cutting edge, and the circumferential array of the second milling cone is provided with a plurality of alloy blades, and the alloy blades and the spiral cutting edge are used to grind and repair the deformed parts.

[0008] Preferably, the maximum outer diameter of the first milling cone is consistent with the inner diameter of the sleeve.

[0009] Preferably, a guide rod is further provided at the bottom end of the second milling cone, and a plurality of milling cutting edges are provided at the end of the guide rod.

[0010] Preferably, the pushing device includes a sleeve and a damping spring, the top end of the sleeve is coaxially fixedly connected to the bottom of the driving rod, the damping spring is arranged in the sleeve, one end of the damping spring is fixedly connected to the inner top wall of the sleeve, and the other end is fixedly connected to the end of the core shaft, and the core shaft can extend into the sleeve through the damping spring.

[0011] Preferably, a plurality of limiting rods are provided in a circumferential array at the top end of the core shaft, and a waist slot hole corresponding to the limiting rod is provided on the side wall of the sleeve, and the limiting rod extends outward through the sleeve at the waist slot hole.

[0012] Preferably, the outer diameter of the core shaft is consistent with the inner diameter of the sleeve, and the core shaft can float up and down through a damping spring. When the core shaft floats up and down, the limiting rod moves up and down in the waist groove hole.

[0013] The utility model discloses a sleeve deformation grinding and milling device, including a sleeve, a deformation grinding and milling device is provided in the sleeve, the deformation grinding and milling device includes a first grinding and milling cone and a second grinding and milling cone, the first grinding and milling cone and the second grinding and milling cone are coaxially fixedly connected through a core shaft, the second grinding and milling cone is located below the first grinding and milling cone, and the maximum outer diameter of the second grinding and milling cone is smaller than the maximum outer diameter of the first grinding and milling cone, a driving rod coaxially set with the core shaft is provided in the sleeve, and the driving rod is fixedly connected to the core shaft through a pushing device; compared with the prior art, the sleeve deformation grinding and milling device has the beneficial effect of being able to effectively perform grinding and repair on the deformed part of the sleeve when in use, and is beneficial to protecting the grinding and milling cone during the grinding and milling process, thereby improving the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a casing deformation milling device of the utility model. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the overall structure of a casing deformation milling device of the utility model. Figure 2 .

[0016] Figure 3 It is a structural schematic diagram of the deformation milling device in the utility model.

[0017] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0018] Figure 5 For this utility model Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0019] Figure 6 This is a schematic diagram of the cooperation between the deformation milling device and the casing in the utility model.

[0020] Figure 7 It is a schematic diagram of the milling deformation part of the second milling cone in the present utility model.

[0021] Figure 8 It is a schematic diagram of the deformation part of the first milling cone in the present utility model.

[0022] In the figure: 1. sleeve; 2. first milling cone; 21. spiral cutting edge; 3. second milling cone; 31. alloy blade; 32. guide rod; 33. milling cutting edge; 4. driving rod; 41. sleeve; 42. damping spring; 43. waist groove hole; 5. core shaft; 51. limit rod. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and thus only show components related to the present invention.

[0024] Please refer to Figure 1-5 A casing deformation milling device comprises a casing 1, wherein a deformation milling device is provided in the casing 1, wherein the deformation milling device comprises a first milling cone 2 and a second milling cone 3, wherein the first milling cone 2 and the second milling cone 3 are coaxially fixedly connected via a core shaft 5, wherein the second milling cone 3 is located below the first milling cone 2, and the maximum outer diameter of the second milling cone 3 is smaller than the maximum outer diameter of the first milling cone 2, and a driving rod 4 coaxially arranged with the core shaft 5 is provided in the casing 1, and the driving rod 4 is fixedly connected to the core shaft 5 via a pushing device.

[0025] The pushing device can elastically push the core shaft 5 downward, so that the first milling cone 2 and the second milling cone 3 elastically contact the deformed part, avoiding the first milling cone 2 and the second milling cone 3 directly colliding with the deformed part, which is beneficial to protecting the milling cone.

[0026] Furthermore, the circumference of the first milling cone 2 is provided with a spiral cutting edge 21, and the cutting edge structure is the same as the cutting edge structure of the drill bit circumference, which will not be elaborated here. When the first milling cone 2 rotates at high speed, the spiral cutting edge 21 can be used to grind the deformed part; the circumferential array of the second milling cone 3 is provided with multiple alloy blades 31, and the alloy blades 31 are made of cemented carbide. When the second milling cone 3 rotates at high speed, the deformed part is milled through the alloy blades 31.

[0027] In this embodiment, the alloy blade 31 can also be understood as a scraper, and the deformed part is milled as the alloy blade 31 continuously descends. When in use, both the spiral cutting edge 21 and the alloy blade 31 can grind and repair the deformed part.

[0028] As a preferred solution, the maximum outer diameter of the first milling cone 2 is consistent with the inner diameter of the casing 1, so that the inner diameter of the casing after repair is uniform, ensuring that the deformed part is completely repaired.

[0029] In this embodiment, the drive rod 4 is connected to the motor outside the casing well and can rotate. Since the drive rod 4 is fixedly connected to the core shaft 5 through the pushing device, the core shaft 5 rotates when the drive rod 4 rotates; at this time, the first milling cone 2 and the second milling cone 3 rotate accordingly.

[0030] For specific milling deformation parts, please refer to Figure 6-8 ; Before use, first ensure that the driving rod 4 (the first milling cone 2 and the second milling cone 3) are rotated, and then gradually move the driving rod 4 downward. At this time, the second milling cone 3 first contacts the deformed part. After the second milling cone 3 passes, a through hole will be milled out of the deformed part in the sleeve. The inner diameter of the through hole is consistent with the maximum outer diameter of the second milling cone 3; then the driving rod 4 gradually moves downward until the first milling cone 2 contacts the deformed part. As the whole body gradually descends, the deformation in the sleeve is completely milled to ensure that the sleeve is through.

[0031] In this embodiment, a guide rod 32 is further provided at the bottom end of the second milling cone 3 , and a plurality of milling cutting edges 33 are provided at the end of the guide rod 32 .

[0032] When the deformed part is close to the center of the sleeve, the second milling cone 3 cannot directly mill and clear it. Therefore, when the driving rod moves downward, the guide rod 32 and the milling blade 33 first contact the deformed part, and first gradually expand the deformed part, so that the second milling cone 3 can enter smoothly, thereby improving the deformation repair efficiency.

[0033] In the solution of the present utility model, the pushing device includes a sleeve 41 and a damping spring 42. The top end of the sleeve 41 is coaxially fixedly connected to the bottom of the driving rod 4. The damping spring 42 is arranged in the sleeve 41. One end of the damping spring 42 is fixedly connected to the inner top wall of the sleeve 41, and the other end is fixedly connected to the end of the core shaft 5. The core shaft 5 can extend into the sleeve 41 through the damping spring 42.

[0034] Among them, the top circumferential array of the core shaft 5 is provided with multiple limit rods 51, and the side wall of the sleeve 41 is provided with a waist groove hole 43 corresponding to the limit rod 51, and the limit rod 51 extends outward through the sleeve 1 at the waist groove hole 43; in addition, the outer diameter of the core shaft 5 is consistent with the inner diameter of the sleeve 1, which further plays a limiting role, so that the core shaft 5 can float up and down through the damping spring 42 without shaking or deviating. The core shaft 5 can float up and down through the damping spring 42, and when the core shaft 5 floats up and down, the limit rod 51 moves up and down in the waist groove hole 43.

[0035] When the driving rod 4 moves downward so that the first or second milling cone first contacts the deformed portion, the first milling cone 2 or the second milling cone 3 is subjected to an upward reaction force, at which time the damping spring 42 retracts, and the core shaft 5 retracts the first milling cone 2 and the second milling cone 3 upward. At the same time, the limiting rod 51 moves upward within the waist slot 43, preventing the first milling cone 2 and the second milling cone 3 from directly hitting the deformed portion and thus preventing damage to the first milling cone 2 and the second milling cone 3. As the driving rod 4 continues to fall, the first milling cone 2 and the second milling cone 3 will gradually move downward, thereby gradually repairing the deformed portion and ensuring the penetration of the casing.

[0036] Based on the above embodiments, the deformation portion in this solution can be a concave deformation inside the sleeve, or a crystallization inside the tube, etc.

[0037] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A casing deformation milling device, comprising a casing, characterized in that: A deformation milling device is provided in the sleeve, and the deformation milling device includes a first milling cone and a second milling cone, the first milling cone and the second milling cone are coaxially fixedly connected via a core shaft, the second milling cone is located below the first milling cone, and the maximum outer diameter of the second milling cone is smaller than the maximum outer diameter of the first milling cone, and a driving rod coaxially set with the core shaft is provided in the sleeve, and the driving rod is fixedly connected to the core shaft through a pushing device; the pushing device includes a sleeve and a damping spring, the top end of the sleeve is coaxially fixedly connected to the bottom of the driving rod, the damping spring is provided in the sleeve, one end of the damping spring is fixedly connected to the inner top wall of the sleeve, and the other end is fixedly connected to the end of the core shaft, and the core shaft can extend into the sleeve through the damping spring.

2. The casing deformation milling device according to claim 1, characterized in that: The circumference of the first milling cone is provided with a spiral cutting edge, and the circumference array of the second milling cone is provided with a plurality of alloy blades, and the alloy blades and the spiral cutting edge are used to grind and repair the deformed parts.

3. The casing deformation milling device according to claim 2, characterized in that: The maximum outer diameter of the first milling cone is consistent with the inner diameter of the sleeve.

4. The casing deformation milling device according to claim 3, characterized in that: The bottom end of the second milling cone is further provided with a guide rod, and the end of the guide rod is provided with a plurality of milling cutting edges.

5. The casing deformation milling device according to claim 1, characterized in that: A plurality of limiting rods are arranged in a circumferential array on the top of the core shaft, and a waist slot hole corresponding to the limiting rod is arranged on the side wall of the sleeve. The limiting rod passes through the sleeve at the waist slot hole and extends outward.

6. The casing deformation milling device according to claim 5, characterized in that: The outer diameter of the core shaft is consistent with the inner diameter of the sleeve. The core shaft can float up and down through a damping spring. When the core shaft floats up and down, the limiting rod moves up and down in the waist groove hole.

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