Split type strong magnetic fisher

Abstract

The utility model relates to the field of oil field well repair, in particular to a split type strong magnetic fisher. Comprising an upper connector and a mounting seat, a coupling is arranged at the first end of the upper connector, and a screw thread is arranged in the coupling and used for being connected with an upper pipe column; the second end of the upper joint is a male buckle; the first end of the mounting base is provided with a female buckle used for being detachably connected with the male buckle, and the second end of the mounting base is provided with a mounting groove used for mounting the strong magnet. At present, a strong magnetic fishing tool used on site adopts an integrated design, that is, a magnet and an outer cylinder are fixed together, cannot be detached and have no inverse well-flushing channel, and after the strong magnetic fishing tool is stored for a period of time or used for multiple times, the strong magnet is demagnetized, the adsorption effect is greatly reduced, the fishing success rate is greatly reduced, and the fishing efficiency is greatly improved due to the influence of time or the temperature of an oil-water well. If a strong magnet is replaced, the whole strong magnetic fisher needs to be replaced, the production cost is high, and therefore a split type strong magnetic fisher is needed.

Description

Technical Field

[0001] The utility model relates to the field of oilfield well repair, in particular to a split-type strong magnetic salvage device. Background Art

[0002] During the overhaul salvage operation of oil and water wells, strong magnetic salvage devices are often used to salvage small iron objects. The strong magnetic salvage tools currently used on site adopt an integrated design. For example, the existing CN212428683U is a sleeve-milling strong magnetic salvage tube, in which the magnet and the outer tube are fixed together and cannot be disassembled, and there is no backwash well channel. After the strong magnetic salvage device is stored for a period of time or used several times, it is affected by time or the well temperature of the oil and water well, resulting in the demagnetization of the strong magnet, which greatly reduces the adsorption effect and the success rate of salvage. If the strong magnet is replaced, the entire strong magnetic salvage device needs to be replaced, which has high production costs. Therefore, a split strong magnetic salvage device is urgently needed. Utility Model Content

[0003] The utility model aims to provide a split strong magnetic salvage device to solve the problems of high replacement cost and low salvage efficiency of the strong magnetic salvage device.

[0004] A split strong magnetic salvage device comprises an upper joint and a mounting seat, wherein the first end of the upper joint is a coupling, and a thread is arranged inside the coupling for connecting with an upper pipe column; the second end of the upper joint is a male buckle; the first end of the mounting seat is provided with a female buckle for detachably connecting with the male buckle, and the second end of the mounting seat is provided with a mounting groove for installing a strong magnet.

[0005] Optionally, the mounting groove is provided with a fastening device for reinforcing the strong magnet to prevent it from falling off.

[0006] Optionally, the fastening device is a fixing screw, and there are multiple fixing screws installed in the threaded holes on the sides of the installation groove. The fixing screws are used to resist the strong magnet.

[0007] Optionally, a first cavity connecting the first end and the second end is opened inside the mounting seat, the first cavity is connected to a second cavity opened inside the upper joint, and the second cavity is connected to the upper pipe column.

[0008] Optionally, a second fixing screw is further included, a hollow bracket is arranged inside the mounting groove, a mounting hole is arranged on the hollow bracket, a through hole is opened in the middle of the strong magnet, and the second fixing screw passes through the through hole and is threadedly connected to the mounting hole.

[0009] Optionally, a pull hook is provided on the side of the mounting seat.

[0010] Optionally, the hollow bracket is a cross bracket, the center of the cross bracket is a boss for extending to a suitable position at a distance from the strong magnet, and a mounting hole is provided at the center of the boss.

[0011] Optionally, the second end surface of the mounting seat is a smooth surface, so as to facilitate the contact between the strong magnet and fallen objects in the well.

[0012] Optionally, an extrusion device is provided at the bottom of the installation slot for squeezing the strong magnet out of the installation slot to facilitate replacement of the strong magnet.

[0013] Optionally, the first cavity is connected to the mounting groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The present application adopts a detachable split design of the upper joint and the mounting base, which facilitates the installation, removal and replacement of the strong magnet, saving cost and time.

[0016] 2. The present application forms a well-washing channel through the first cavity and the second cavity, which is convenient for washing the fish top before salvaging, thereby improving the success rate of salvaging and reducing the well occupation period.

[0017] 3. This application increases the adaptability of fishing by setting a pull hook to cope with different fish top situations.

[0018] 4. The present application fixes the strong magnet with screws on the top and sides, thereby enhancing the connection strength between the strong magnet and the mounting base, preventing the strong magnet from falling off or shifting, and ensuring the safety of salvage.

[0019] 5. The present application provides an extrusion device through the mounting seat, which is used to extrude the strong magnet out of the mounting seat, thereby facilitating the replacement of the strong magnet and simplifying the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a structural schematic diagram of a split strong magnetic salvage device embodiment.

[0021] Figure 2 The utility model is a schematic diagram of a hook-pulling structure of a split-type strong magnetic salvage device embodiment.

[0022] Among them, 1-upper joint, 2-mounting seat, 3-strong magnet, 4-fixing screw, 5-second fixing screw, 6-pulling hook. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0024] The following detailed descriptions are all exemplary descriptions, and are intended to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meanings as those generally understood by those skilled in the art to which the present application belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0025] like Figure 1 As shown, a split strong magnetic salvage device includes an upper joint 1 and a mounting seat 2. The first end of the upper joint 1 is a coupling, and a thread is arranged inside the coupling for connecting with the upper pipe column; the second end of the upper joint 1 is a male buckle; the first end of the mounting seat 2 is provided with a female buckle for detachable connection with the male buckle, and the second end of the mounting seat 2 is provided with a mounting groove for installing a strong magnet 3.

[0026] Specifically, the upper joint 1 can be a barrel-shaped one, and the coupling can be tightened to lock the upper joint 1 to the upper pipe column. The upper joint 1 and the mounting seat 2 of the split-type strong magnetic salvage device are threadedly connected, which is convenient for disassembly and replacement. The coupling of the upper joint 1 is used to connect with the salvage pipe column to transmit the force and torque of the pipe column. The male buckle of the upper joint 1 is used to connect with the female buckle of the mounting seat 2 to form a detachable joint. The mounting groove of the mounting seat 2 is used to install the strong magnet 3, which is a cylinder and can be inserted into the mounting groove and fixed by a fastening device such as a fixing screw 4. The strong magnet 3 is used to absorb small iron objects that fall down the well, such as drill clamps, palms, gears, etc. The split-type strong magnetic salvage device has a simple structure, which is convenient for the installation, disassembly and replacement of the strong magnet 3, saving cost and time.

[0027] As a preferred example, the mounting groove is provided with a fastening device for reinforcing the strong magnet 3 to prevent it from falling off.

[0028] The side and bottom of the installation slot are provided with a plurality of threaded holes for installing fastening devices such as fixing screws 4. The fastening devices are used to reinforce the strong magnet 3 to prevent the strong magnet 3 from falling off or shifting due to impact, vibration or tension during the salvage process. The number and position of the fastening devices can be adjusted according to the size and shape of the strong magnet 3 to ensure the stability and safety of the strong magnet 3.

[0029] As a specific example, the fastening device is a fixing screw 4 , and there are multiple fixing screws 4 installed in the threaded holes on the side of the installation groove. The fixing screws 4 are used to resist the strong magnet 3 .

[0030] The fixing screw 4 is a metal screw with a thread at one end and a flat head or a concave head at the other end. The threaded portion of the fixing screw 4 is screwed into the threaded hole of the mounting slot, and the flat head or the concave head portion abuts against the side of the strong magnet 3 to form a stopper to prevent the strong magnet 3 from moving. The number and position of the fixing screws 4 can be adjusted according to the size and shape of the strong magnet 3 to ensure the stability and safety of the strong magnet 3.

[0031] As a preferred example, a first cavity connecting the first end and the second end is opened inside the mounting seat 2, the first cavity is connected to a second cavity opened inside the upper joint 1, and the second cavity is connected to the upper pipe column.

[0032] The interior of the mounting seat 2 is a hollow structure, forming a first cavity connecting the first end of the mounting seat 2 and the second end of the mounting seat 2. The upper part of the first cavity is connected to the second cavity inside the upper joint 1, and the upper part of the second cavity is connected to the upper pipe column. The first cavity and the second cavity form a well washing channel, which is used to wash the fish top before salvaging, remove the mud and debris at the bottom of the well, and improve the success rate of salvaging. The diameter and length of the well washing channel can be adjusted according to the downhole conditions to ensure the washing effect and flow rate.

[0033] As a preferred example, it also includes a second fixing screw 5, a hollow bracket is arranged inside the mounting groove, a mounting hole is arranged on the hollow bracket, a through hole is opened in the middle of the strong magnet 3, and the second fixing screw 5 passes through the through hole and is threadedly connected to the mounting hole.

[0034] The hollow bracket is a metal bracket in a cross shape or other shapes, which is used to support the strong magnet 3. The hollow bracket is provided with a mounting hole, which is a threaded hole for connecting the second fixing screw 5. The second fixing screw 5 is a metal screw with a thread at one end and a flat head or a concave head at the other end. A through hole is opened in the middle of the strong magnet 3, and the through hole is a round hole or a hole of other shapes, which is used to pass the second fixing screw 5. The threaded portion of the second fixing screw 5 passes through the through hole of the strong magnet 3 and is threadedly connected to the mounting hole of the hollow bracket. The flat head or concave head portion abuts against the top of the strong magnet 3 to form a stopper to prevent the vertical movement of the strong magnet 3. The number and position of the second fixing screw 5 can be adjusted according to the size and shape of the strong magnet 3 to ensure the stability and safety of the strong magnet 3. The second fixing screw 5 can also be a double male screw, one end of which is threadedly connected to the mounting seat 2, and the other end is threadedly connected to the strong magnet 3.

[0035] like Figure 2 As shown, as a preferred example, a pull hook 6 is provided on the side of the mounting seat 2 .

[0036] The pull hook 6 is a metal hook with a curved shape, which is used to pull out small objects stuck between the oil pipe and the casing. The number and position of the pull hook 6 can be adjusted according to the downhole conditions to ensure the effectiveness and adaptability of the pull hook 6. One end of the pull hook 6 is connected to the mounting seat 2, and the other end extends out of the side of the mounting seat 2 to form a protruding hook. When the stuck small objects are salvaged, the pipe string is rotated by the ground machinery to cause the pull hook 6 to generate friction and compression with the small objects, thereby pulling the small objects out of the gap between the oil pipe and the casing, making it easy to salvage these stuck small objects.

[0037] When the pulling hook 6 is needed, the pulling hook mounting seat can replace the mounting seat 2 without the pulling hook 6.

[0038] As a preferred example, the hollow bracket is a cross bracket, and the center of the cross bracket is a boss for extending to a proper position away from the strong magnet 3, and a mounting hole is provided at the center of the boss.

[0039] The cross bracket is a metal bracket in the shape of a cross, which is used to support the strong magnet 3. The gap of the cross bracket can be washed by water flow, and the water flow flows out from the side of the strong magnet 3. The center of the cross bracket is a boss, which is a metal boss in the shape of a cylinder, used to extend to a suitable position away from the strong magnet 3 to improve the stability of the strong magnet 3. A mounting hole is provided at the center of the boss, which is a threaded hole for connecting the second fixing screw 5. The threaded part of the second fixing screw 5 passes through the through hole of the strong magnet 3 and is threadedly connected with the mounting hole of the boss. The flat head or concave head part abuts against the top of the strong magnet 3 to form a stopper to prevent the vertical movement of the strong magnet 3. The number and position of the second fixing screws 5 can be adjusted according to the size and shape of the strong magnet 3 to ensure the stability and safety of the strong magnet 3.

[0040] As a preferred example, the second end surface of the mounting seat 2 is a smooth surface, which is used to facilitate the contact between the strong magnet 3 and the fallen objects in the well.

[0041] The mounting seat 2 with a smooth surface is a smooth mounting seat, and the mounting seat 2 with a pull-out hook 6 is a pull-out hook mounting seat. The smooth surface is a metal plane, which is used to facilitate the contact between the strong magnet 3 and the objects in the well. The diameter and thickness of the smooth surface can be adjusted according to the size and shape of the strong magnet 3 to ensure the integrity and adsorption effect of the strong magnet 3. The function of the smooth surface is to maximize the contact area between the strong magnet 3 and the objects in the well, improve the adsorption force of the strong magnet 3, and also protect the strong magnet 3 from being scratched by the objects in the well.

[0042] As a preferred example, an extrusion device is provided at the bottom of the installation slot for squeezing the strong magnet 3 out of the installation slot to facilitate replacement of the strong magnet 3 .

[0043] The extrusion device can be a metal rod in a cylindrical shape, which is used to extrude the strong magnet 3 from the installation groove. One end of the extrusion device is connected to the bottom of the installation groove, and the other end extends out of the mounting seat 2 to form a protruding rod. When the strong magnet 3 needs to be replaced, the extrusion device is pushed by ground machinery to extrude the strong magnet 3 from the installation groove, which is convenient for replacing the strong magnet 3 and simplifies the operation process. The diameter and length of the extrusion device can be adjusted according to the size and shape of the strong magnet 3 to ensure the extrusion effect and strength.

[0044] As a preferred example, the first cavity is connected to the mounting groove. The first cavity of the split strong magnetic salvage device is connected to the mounting groove to form a well washing channel, which is used to wash the fish top before salvaging, remove the mud and debris at the bottom of the well, and improve the success rate of salvaging. The lower part of the first cavity is connected to the upper part of the mounting groove to form an opening for the flushing liquid to flow from the first cavity into the mounting groove, and then flow out from the side of the strong magnet 3 of the mounting groove to wash the fish top. The size and position of the opening can be adjusted according to the downhole conditions to ensure the flushing effect and flow rate.

[0045] When the first cavity is not connected to the mounting groove, it is connected to the second end of the mounting seat 2 from the side of the mounting groove, and the fish top is flushed from the side of the mounting groove.

[0046] A split type strong magnetic salvage device, which achieves the purpose of reducing costs and increasing efficiency and improving the success rate of salvage by replacing a new strong magnet 3 and optimizing the structure, comprises the following steps:

[0047] Step 1: First determine whether the small objects in the well are stuck in the annulus of the casing. If small objects are stuck in the annulus of the casing, use the hook-pulling mounting seat to connect it to the upper joint 1. If the situation in the well is unclear, it is preferred to connect the smooth mounting seat to the upper joint 1.

[0048] Step 2: Check the magnetism of the strong magnet 3. If the magnetic force cannot meet the salvage requirements, replace it with a new strong magnet 3. Assemble the split strong magnetic salvage device on the ground, connect the upper connector 1 to the salvage pipe string, and lower it into the well.

[0049] Step 3: When the tool is lowered to the salvage position, turn on the pump for reverse circulation to flush the fish top. If a strong magnetic salvage device with a puller hook 6 is lowered, rotate the pipe string while flushing to pull out small objects stuck in the annulus. After stopping the pump, lower the pipe string and lower the hanging weight by about 5KN. Repeat the salvage three times.

[0050] Step 4: Pull out the salvage pipe and check the salvaged objects.

[0051] Step 5: After the salvage is completed, remove the strong magnet 3 and store it in a wooden box.

[0052] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A split strong magnetic salvage device, characterized in that: include, An upper joint (1), wherein the first end of the upper joint (1) is a coupling, wherein a thread is provided inside the coupling for connection with an upper pipe column; the second end of the upper joint (1) is a male thread; A mounting seat (2), wherein a female buckle is provided at a first end of the mounting seat (2) for detachably connecting with the male buckle, and a mounting groove is provided at a second end of the mounting seat (2) for mounting a strong magnet (3).

2. A split type strong magnetic salvage device according to claim 1, characterized in that: The mounting groove is provided with a fastening device for reinforcing the strong magnet (3) to prevent it from falling off.

3. A split type strong magnetic salvage device according to claim 2, characterized in that: The fastening device is a fixing screw (4), and there are a plurality of fixing screws (4) installed in threaded holes on the side of the installation groove. The fixing screws (4) are used to resist the strong magnet (3).

4. A split type strong magnetic salvage device according to claim 1, characterized in that: A first cavity is formed inside the mounting seat (2) and is connected to the first end and the second end; the first cavity is connected to a second cavity formed inside the upper joint (1); and the second cavity is connected to the upper pipe column.

5. A split type strong magnetic salvage device according to claim 1, characterized in that: It also comprises a second fixing screw (5), a hollow bracket is arranged inside the mounting groove, a mounting hole is arranged on the hollow bracket, a through hole is opened in the middle of the strong magnet (3), and the second fixing screw (5) passes through the through hole and is threadedly connected to the mounting hole.

6. A split strong magnetic salvage device according to claim 1, characterized in that: A pulling hook (6) is provided on the side of the mounting seat (2).

7. A split type strong magnetic salvage device according to claim 5, characterized in that: The hollow bracket is a cross bracket, and the center of the cross bracket is a boss, which is used to extend to a suitable position away from the strong magnet (3), and a mounting hole is provided at the center of the boss.

8. A split type strong magnetic salvage device according to claim 1, characterized in that: The second end surface of the mounting seat (2) is a smooth surface, which is used to facilitate the contact between the strong magnet (3) and the fallen objects in the well.

9. A split type strong magnetic salvage device according to claim 1, characterized in that: An extrusion device is provided at the bottom of the installation groove, which is used to extrude the strong magnet (3) out of the installation groove, thereby facilitating replacement of the strong magnet (3).

10. A split type strong magnetic salvage device according to claim 4, characterized in that: The first cavity is communicated with the mounting groove.

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