Strong magnetic fishing drilling tool device

Abstract

The utility model relates to a strong magnetic fishing drilling tool device which comprises a device body, the device body is connected with at least two integrated multi-blade straight edge centralizers, and each integrated multi-blade straight edge centralizer comprises centralizer blades arranged at intervals in the circumferential direction. The centralizer blades of the two integrated multi-blade straight-edge centralizers which are adjacent in the axial direction are arranged in a staggered manner in the circumferential direction; ndFeB high-temperature magnets used for adsorbing residual scrap iron in the drilling fluid are arranged on the two sides of each centralizer blade in the circumferential direction. The shaft scrap iron cleaning device can effectively clean residual scrap iron in a shaft, does not affect normal well drilling, and is of great significance in reducing damage to underground precise instruments and ensuring normal use of underground expensive tools.

Description

Technical Field

[0001] The utility model relates to the technical field of underground safety control, in particular to a strong magnetic fishing drilling tool device. Background Art

[0002] With the optimization of well depth and operation technology, long-term downhole operations have caused serious wear and tear on casing, drilling tools, etc. In addition, the iron impurities in the drilling fluid material cause a large amount of iron filings to remain in the drilling fluid, which can easily enter the vertical drilling tool filter, MWD instrument turbine and other precision devices, causing serious impact on measurement accuracy and even making it impossible to work normally. This is the main reason for the current instrument distortion.

[0003] Therefore, the inventor, relying on his many years of experience and practice in related industries, proposes a strong magnetic fishing drilling tool device to overcome the defects of the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a strong magnetic fishing drilling tool device, overcome the defects of the prior art, solve the problem of residual iron filings in the drilling fluid, and reduce the risk of failure of downhole instruments and tools. The utility model can effectively clean the residual iron filings in the wellbore without affecting normal drilling, which is of great significance for reducing damage to downhole precision instruments and ensuring the normal use of expensive downhole tools.

[0005] The purpose of the utility model is achieved in this way. A strong magnetic salvage drilling tool device includes a device body, at least two integrated multi-blade straight-edge centralizers are connected to the device body, the integrated multi-blade straight-edge centralizer includes centralizer blades arranged at intervals along the circumferential direction, and the centralizer blades of two axially adjacent integrated multi-blade straight-edge centralizers are arranged in a circumferential staggered manner; NdFeB high-temperature magnets for absorbing residual iron filings in drilling fluid are arranged on both circumferential sides of each of the centralizer blades.

[0006] In a preferred embodiment of the present invention, a polycrystalline diamond composite sheet is inlaid on the top surface of the centralizer blade.

[0007] In a preferred embodiment of the present invention, the temperature resistance level of the NdFeB high temperature magnet is 200°C.

[0008] In a preferred embodiment of the present invention, the minimum outer diameter dimension of the interval between two adjacent blades of each of the integrated multi-blade straight-edge centralizers is set to be the same as the outer diameter dimension of the device body.

[0009] In a preferred embodiment of the present invention, the device body and the integrated multi-blade straight edge stabilizer are made of 42CrMo.

[0010] In a preferred embodiment of the present invention, the centralizer blade is a straight blade.

[0011] In a preferred embodiment of the present invention, the axial length of the integrated multi-blade straight edge stabilizer is 200-400 mm.

[0012] In a preferred embodiment of the present invention, the axial spacing between two adjacent integrated multi-blade straight-edge stabilizers is 100-300 mm.

[0013] In a preferred embodiment of the present invention, the number of blades of each of the integrated multi-blade straight-edge centralizers is 3-5.

[0014] In a preferred embodiment of the present invention, the number of the integrated multi-blade straight edge stabilizers is 3-5.

[0015] As described above, the strong magnetic fishing drilling tool device of the utility model has the following beneficial effects:

[0016] In the utility model, NdFeB high-temperature magnets are arranged on both sides of the blades of the centralizer in the circumferential direction to ensure that residual iron filings are fully absorbed when the fluid flows through; the blades of the centralizers of the two axially adjacent integrated multi-blade straight-edge centralizers are arranged in a circumferential staggered manner, with a larger flow area, and the circulating fluid can fully contact the blades of the centralizer, so that the strong magnetic function is better exerted and the salvage efficiency is higher. The utility model is used in the well to effectively clean the residual iron filings in the wellbore without affecting the normal drilling, which is of great significance for reducing the damage to the precision instruments downhole and ensuring the normal use of expensive tools downhole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0018] Figure 1 It is a schematic diagram of the strong magnetic salvage drilling tool device of the utility model.

[0019] In the figure:

[0020] 1. Device body;

[0021] 2. Integrated multi-blade straight edge centralizer;

[0022] 21. Straightener blade;

[0023] 22. NdFeB high temperature magnet;

[0024] 23. Polycrystalline diamond composite sheet. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0026] The specific implementation of the utility model described herein is only used to explain the purpose of the utility model, and cannot be understood as a limitation of the utility model in any way. Under the guidance of the utility model, technicians can conceive of any possible deformation based on the utility model, which should be regarded as belonging to the scope of the utility model. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figure 1 As shown, the utility model provides a strong magnetic fishing drilling tool device, including a device body 1, to which at least two integrated multi-blade straight edge stabilizers 2 are connected, and the integrated multi-blade straight edge stabilizers 2 include stabilizer blades 21 arranged at intervals along the circumferential direction, and the number of integrated multi-blade straight edge stabilizers 2 and the number of blades of each group of stabilizers can be flexibly adjusted according to the downhole needs; the stabilizer blades 21 of two axially adjacent integrated multi-blade straight edge stabilizers 2 are arranged in a circumferential staggered manner; and the circumferential sides of each stabilizer blade 21 are provided with NdFeB high-temperature magnets 22 for absorbing residual iron filings in the drilling fluid. In this embodiment, the NdFeB high-temperature magnets 22 are embedded in the side of the stabilizer blade, which is more stable, not easy to fall off, and has better safety.

[0029] NdFeB magnets, also known as permanent magnets, are a high-performance permanent magnet material, mainly composed of neodymium, iron, boron and other elements. NdFeB magnets are considered to be the strongest permanent magnets on the market, and their magnetic force far exceeds that of ordinary magnets. This type of magnet has high magnetic properties, a maximum operating temperature of 200°C, hard texture, stable performance, good machining performance, and high overall cost performance.

[0030] The integrated multi-blade straight edge centralizer group of this utility model adopts NdFeB high temperature magnets with higher temperature resistance and stronger magnetic force to meet the needs of high temperature resistance and iron scrap adsorption. The NdFeB high temperature magnets have a temperature resistance of up to 200°C, a larger magnetic energy product, excellent mechanical properties, and a wider range of underground application scenarios.

[0031] In the utility model, NdFeB high-temperature magnets are arranged on both sides of the blades of the centralizer in the circumferential direction to ensure that residual iron filings are fully absorbed when the fluid flows through; the blades of the centralizers of the two axially adjacent integrated multi-blade straight-edge centralizers are arranged in a circumferential staggered manner, with a larger flow area, and the circulating fluid can fully contact the blades of the centralizer, so that the strong magnetic function is better exerted and the salvage efficiency is higher. The utility model is used in the well to effectively clean the residual iron filings in the wellbore without affecting the normal drilling, which is of great significance for reducing the damage to the precision instruments downhole and ensuring the normal use of expensive tools downhole.

[0032] Further, if Figure 1 As shown, the top surface of the centralizer blade 21 is inlaid with a polycrystalline diamond composite sheet 23, which has strong wear resistance.

[0033] Furthermore, the temperature resistance level of the NdFeB high temperature magnet 22 is 200°C.

[0034] Furthermore, the minimum outer diameter dimension of the interval between two adjacent centralizer blades 21 on each integrated multi-blade straight-edge centralizer 2 is set to be the same as the outer diameter dimension of the device body 1 .

[0035] like Figure 1 As shown, the stabilizer blade 21 has arc transition at the stabilizing surface and the interval; the overall flexibility is better, the wellbore passing ability is stronger, and it can be used under any well conditions.

[0036] Furthermore, the device body 1 and the integrated multi-blade straight-edge stabilizer 2 are both made of high-strength steel and are integrally formed, with higher strength and hardness, stronger corrosion resistance and erosion resistance, wider range of applications, and reusability; in a specific embodiment of the utility model, the device body 1 and the integrated multi-blade straight-edge stabilizer 2 are both made of 42CrMo, which has excellent material properties, and the overall mechanical properties of the strong magnetic salvage drilling tool device of the utility model are stronger.

[0037] The outer diameters of the device body 1 and the integrated multi-blade straight-edge centralizer 2 can be adjusted as needed, and the number of centralizer blades, the number of centralizer groups, and the distance between two groups of centralizers can all be adjusted as needed, so the application range is wider.

[0038] Furthermore, the centralizer blade 21 is a straight blade.

[0039] Furthermore, the axial length of the integrated multi-blade straight edge centralizer 2 is 200-400 mm.

[0040] Furthermore, the axial spacing between two adjacent integrated multi-blade straight edge centralizers 2 is 100-300 mm.

[0041] Furthermore, the blades 21 of each integrated multi-blade straight-edge centralizer 2 are evenly distributed along the circumferential direction, and the number of the blades 21 of each integrated multi-blade straight-edge centralizer 2 is adjusted as needed, preferably 3-5.

[0042] Furthermore, the number of the integrated multi-blade straight edge centralizers 2 is adjusted as needed, preferably 3-5.

[0043] In the utility model, both ends of the integrated multi-blade straight edge centralizer 2 are connected by threads (the thread type is adjusted according to needs) to the device body 1. The outer diameter of the device body 1 and the threads at the upper and lower ends can be flexibly adjusted according to needs to adapt to different downhole requirements.

[0044] As described above, the strong magnetic fishing drilling tool device of the utility model has the following beneficial effects:

[0045] In the utility model, NdFeB high-temperature magnets are arranged on both sides of the blades of the centralizer in the circumferential direction to ensure that residual iron filings are fully absorbed when the fluid flows through; the blades of the centralizers of the two axially adjacent integrated multi-blade straight-edge centralizers are arranged in a circumferential staggered manner, with a larger flow area, and the circulating fluid can fully contact the blades of the centralizer, so that the strong magnetic function is better exerted and the salvage efficiency is higher. The utility model is used in the well to effectively clean the residual iron filings in the wellbore without affecting the normal drilling, which is of great significance for reducing the damage to the precision instruments downhole and ensuring the normal use of expensive tools downhole.

[0046] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A strong magnetic salvage drilling tool device, characterized in that: The device comprises a device body, to which at least two integrated multi-blade straight-edge centralizers are connected, the integrated multi-blade straight-edge centralizers comprise centralizer blades spaced circumferentially, the centralizer blades of two axially adjacent integrated multi-blade straight-edge centralizers are staggered circumferentially; and neodymium iron boron high-temperature magnets for absorbing residual iron filings in drilling fluid are arranged on both circumferential sides of each centralizer blade.

2. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The top surface of the centralizer blade is inlaid with a polycrystalline diamond composite sheet.

3. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The temperature resistance level of the NdFeB high temperature magnet is 200°C.

4. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The minimum outer diameter dimension of the interval between two adjacent blades of each integrated multi-blade straight-edge centralizer is set to be the same as the outer diameter dimension of the device body.

5. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The device body and the integrated multi-blade straight edge straightener are made of 42CrMo.

6. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The centralizer blade is a straight blade.

7. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The axial length of the integrated multi-blade straight edge centralizer is 200-400 mm.

8. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The axial spacing between two adjacent integrated multi-blade straight-edge stabilizers is 100-300 mm.

9. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The number of blades of each integrated multi-blade straight-edge centralizer is 3-5.

10. The strong magnetic fishing drilling tool device according to claim 1, characterized in that: The number of the integrated multi-blade straight edge straighteners is 3-5.

Images