Improved through pipe milling tool

Abstract

The utility model relates to the technical field of milling devices, and provides an improved through pipe milling tool which comprises a milling cone body, the top of the milling cone body is fixedly connected with a milling cone upper portion, the bottom of the milling cone body is fixedly connected with a milling cone lower portion, and the surfaces of the milling cone body, the milling cone upper portion and the milling cone lower portion are fixedly connected with alloy belts. According to the improved grinding and milling tool, under the action of the centralizer body, it can be guaranteed that the grinding and milling angle is basically centered in a casing pipe and does not deflect, the deflection influence cannot be generated, the grinding and milling angle can be guaranteed, the grinding and milling efficiency is high, after the grinding and milling drilling tool is centered, the stress on the periphery is relatively uniform, and the grinding and milling efficiency is high. The milling speed is effectively increased, the accident handling speed is increased, the construction cost is saved, the drilling tool carcass is not abraded greatly, on-site automatic machining and repair welding can be achieved through the outer grinding face alloy, the construction efficiency is greatly improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a milling device technical field, concretely relates to an improved pipe milling tool. BACKGROUND

[0002] In the in-situ leaching uranium test and production, the casing pipe must be lowered into the well whether it is a pumping well, an injection well or a monitoring well. The casing pipe mainly plays a role of creating an annular space for borehole sealing, making it possible to seal the borehole and stop water, and also creating a low-resistance loss channel for pumping and injection. When the casing pipe deforms under external force, a milling tool needs to be used to repair it.

[0003] However, many milling tools are prone to deflection during use, causing the tool head to be stressed and the beveled part to be unstressed. Moreover, the traditional milling tool plane and concave milling tool are prone to causing the deformed casing pipe to accumulate in the middle during drilling, resulting in the problem of lower blockage.

[0004] In view of this, the utility model provides an improved pipe milling tool. SUMMARY

[0005] The utility model provides an improved pipe milling tool, which solves the problem of deflection of many milling tools during use, causing the tool head to be stressed and the beveled part to be unstressed, and the problem of the traditional milling tool plane and concave milling tool being prone to causing the deformed casing pipe to accumulate in the middle during drilling, resulting in lower blockage.

[0006] The technical scheme of the utility model is as follows: an improved pipe milling tool, comprising a milling cone body, a milling cone upper part fixedly connected to the top of the milling cone body, a milling cone lower part fixedly connected to the bottom of the milling cone body, alloy strips fixedly connected to the surfaces of the milling cone body, the milling cone upper part and the milling cone lower part, a drill bit arranged at the bottom of the milling cone lower part, a centralizer body fixedly connected to one end of the surfaces of the milling cone upper part and the milling cone lower part, side strips fixedly connected to the surfaces of the two centralizer bodies, reinforcing rings fixedly connected to the top and the bottom of the two centralizer bodies, first connection holes arranged on the surfaces of the two centralizer bodies, and second connection holes arranged on one end of the surfaces of the milling cone upper part and the milling cone lower part.

[0007] Preferably, the surfaces of the milling cone upper part and the milling cone lower part are beveled.

[0008] Preferably, the angle of inclination of the milling cone lower part is 15°, and the angle of inclination of the milling cone upper part is 30°.

[0009] Preferably, the milling surface material is YD type hard alloy composite material.

[0010] Preferably, the alloy strips are equidistantly arranged with respect to the center of the milling cone body, and the alloy strips are arranged in a strip shape.

[0011] Preferably, the contact position of the alloy strips with the milling cone body is arranged at an inclination of 40°.

[0012] Preferably, the first and second connection holes are matched in position and size, and the two sets of centralizer bodies are closely fitted with the surfaces of the upper and lower milling cone portions.

[0013] Preferably, the side strips are equidistantly arranged with respect to the center of the centralizer body, and the side strips and the reinforcing rings are made of high-speed steel.

[0014] The working principle and beneficial effects of the utility model are as follows:

[0015] In the utility model, the improved milling tool can ensure that the milling angle is basically centered in the casing, is not skewed, and is not affected by skewing, can ensure the milling angle, has high milling efficiency, and after the milling drilling tool is centered, the stress around the milling drilling tool is relatively uniform, the milling speed is effectively improved, the processing accident speed is improved, the construction cost is saved, the drilling tool body is not greatly worn, the outer milling surface alloy can be self-processed and welded on site, the construction efficiency is greatly improved, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0017] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0018] Fig. 2 It is a plane structure schematic view of the utility model;

[0019] Fig. 3 It is a first connection hole position schematic view of the utility model;

[0020] Fig. 4 It is a centralizer body structure schematic view of the utility model.

[0021] In the drawing: 1, milling cone body; 2, upper milling cone portion; 3, lower milling cone portion; 4, alloy strip; 5, drill bit; 6, centralizer body; 7, side strip; 8, reinforcing ring; 9, first connection hole; 10, second connection hole. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the utility model. Embodiment

[0023] The preferable embodiment of the improved through pipe milling tool provided by the utility model is as shown in the figure: Figs. 1 to 4 The improved through pipe milling tool comprises a milling cone body 1, the top of the milling cone body 1 is fixedly connected with a milling cone upper part 2, the bottom of the milling cone body 1 is fixedly connected with a milling cone lower part 3, the surfaces of the milling cone body 1, the milling cone upper part 2 and the milling cone lower part 3 are all fixedly connected with alloy strips 4, the bottom of the milling cone lower part 3 is provided with a drill bit 5, the surfaces of the milling cone upper part 2 and the milling cone lower part 3 at one end of the alloy strips 4 are all fixedly connected with centralizer bodies 6, the surfaces of the two groups of centralizer bodies 6 are all fixedly connected with side strips 7, the top and the bottom of the two groups of centralizer bodies 6 are all fixedly connected with reinforcing rings 8, the surfaces of the two groups of centralizer bodies 6 are all provided with first connection holes 9, and the surfaces of the milling cone upper part 2 and the milling cone lower part 3 at one end of the alloy strips 4 are all provided with second connection holes 10.

[0024] In the embodiment, the surfaces of the milling cone upper part 2 and the milling cone lower part 3 are all inclined surfaces, which can effectively prevent the problem of encountering resistance when drilling.

[0025] In the embodiment, the angle of inclination of the milling cone lower part 3 is 15°, and the angle of inclination of the milling cone upper part 2 is 30°, so that the contact area of the cutting surface is increased, and the drilling tool is convenient to insert or take out.

[0026] In the embodiment, the material of the milling surface is YD type hard alloy composite material, and the electrode is commonly used for welding workpieces that are severely worn or have cutting function in petroleum and mining operations, so that the overall device has higher pressure resistance when in use.

[0027] In the embodiment, the alloy strips 4 are equidistantly arranged about the center of the milling cone body 1, and the alloy strips 4 are in the shape of a long strip, so that the milling progress can be accelerated by arranging multiple groups of alloy strips 4.

[0028] In the embodiment, the contact part of the alloy strip 4 and the milling cone body 1 is arranged at an angle of 40°, and the alloy strip 4 is arranged at an angle, so that the milling efficiency of the device is improved.

[0029] In the embodiment, the first connection hole 9 and the second connection hole 10 are adapted in position and size, the two groups of centralizer bodies 6 are closely combined with the surfaces of the milling cone upper part 2 and the milling cone lower part 3, and the first connection hole 9 and the second connection hole 10 are arranged, so that the centralizer body 6 is fixed, and the milling angle can be ensured not to deviate.

[0030] In the embodiment, the side bars 7 are equidistantly arranged about the center of the centralizer body 6, and the side bars 7 and the reinforcing ring 8 are made of high-speed steel, which can reinforce the centralizer body 6 and avoid deformation caused by extrusion force.

[0031] The working principle and use process of the utility model are as follows: the two centralizer bodies 6 are sleeved in the middle, then the fixing screw is inserted into the first connecting hole 9 and finally embedded into the second connecting hole 10, so that the centralizer body 6 is fixed, the milling angle can be ensured not to deviate, at the same time, in order to speed up the milling progress, the alloy strip 4 is arranged as a 40° inclined surface, the milling efficiency is improved, in order to prevent resistance when drilling, the lower part 3 of the milling cone is inclined by 15°, the contact area of the cutting surface is increased, the upper part 2 of the milling cone is inclined by 30°, the drilling tool is convenient to take out, the whole device is made of YD type hard alloy composite material electrode surfacing, and is more solid and durable in use.

[0032] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An improved through-tubular milling tool comprising a milling cone body (1), characterized in that, The top of the milling cone body (1) is fixedly connected with a milling cone upper part (2), the bottom of the milling cone body (1) is fixedly connected with a milling cone lower part (3), the surfaces of the milling cone body (1), the milling cone upper part (2) and the milling cone lower part (3) are all fixedly connected with alloy strips (4), the bottom of the milling cone lower part (3) is provided with a drill bit (5), the surfaces of the milling cone upper part (2) and the milling cone lower part (3) at one end of the alloy strips (4) are all fixedly connected with centralizer bodies (6), the surfaces of the two groups of centralizer bodies (6) are all fixedly connected with side strips (7), the top and the bottom of the two groups of centralizer bodies (6) are all fixedly connected with reinforcing rings (8), the surfaces of the two groups of centralizer bodies (6) are all provided with first connecting holes (9), and the surfaces of the milling cone upper part (2) and the milling cone lower part (3) at one end of the alloy strips (4) are all provided with second connecting holes (10).

2. The improved through-tubular milling tool according to claim 1, characterized in that The surfaces of the milling cone upper part (2) and the milling cone lower part (3) are all inclined surfaces.

3. The improved through-tubular milling tool according to claim 1, wherein, The angle of inclination of the milling cone lower part (3) is 15°, and the angle of inclination of the milling cone upper part (2) is 30°.

4. The improved through-tubular milling tool of claim 1, wherein, The alloy strips (4) are equidistantly arranged about the center of the milling cone body (1), and the alloy strips (4) are in the shape of long strips.

5. The improved through-tubular milling tool according to claim 1, wherein, The contact part of the alloy strip (4) and the milling cone body (1) is arranged at an inclination of 40°.

6. The improved through-tubular milling tool of claim 1, wherein, The first connecting holes (9) and the second connecting holes (10) are adapted in position and size, and the two groups of centralizer bodies (6) are closely attached to the surfaces of the milling cone upper part (2) and the milling cone lower part (3).

7. The improved through-tubular milling tool of claim 1, wherein, The side strips (7) are equidistantly arranged about the center of the centralizer body (6), and the side strips (7) and the reinforcing rings (8) are all made of high-speed steel.

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