Side opening type strong magnetic fisher

Abstract

The invention belongs to the technical field of solar energy, and particularly relates to a side opening type strong magnetic fisher which comprises a base body, a connector is fixedly connected to the upper portion of the base body, a baffle is fixedly welded to the lower portion of a cylinder of the base body, a bottom plate is fixedly welded to the interior of a semicircular cylinder of the base body, and an insulating partition plate is arranged on the bottom plate. A strong magnetic positioning block and a strong magnet are arranged on the insulating partition plate, and the strong magnetic positioning block, the strong magnet, the insulating partition plate and the bottom plate are fixed together through screws. Due to the fact that the shifting plate is arranged on the outer side of the semicircular cylinder of the novel side-opening type strong magnetic fisher, a large gap is formed between the well wall and the semicircular cylinder, drilling fluid can return upwards easily, the semicircular cylinder can be protected against excessive abrasion, and the service life of the side-opening type strong magnetic fisher is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of solar energy, and in particular relates to a side-opening strong magnetic salvage device. Background Art

[0002] During drilling operations, accidents of some metal debris, broken or fractured gears and tooth palms falling into the well often occur. The side-opening strong magnetic salvage device is a downhole tool used to salvage these fallen objects.

[0003] During salvage, the side-opening strong magnetic salvage device is lowered along the well wall to the position of the fallen objects at the bottom of the well, and the impact force of the drilling fluid is used to impact the fallen objects, so that the fallen objects are adsorbed on the magnet of the strong magnetic salvage device and then brought out of the wellbore. When the fallen objects fall into the wellbore and are not stuck, or the fallen objects are near the middle of the wellbore and stuck at the bottom of the well, the side-opening strong magnetic salvage device is used to salvage them all at once or in several times. When the fallen objects are located around the wellbore and stuck at the bottom of the well, it is almost impossible to salvage the fallen objects by relying solely on the hydraulic impact and magnetic force of the existing side-opening strong magnetic salvage device. In this case, the only way is to lower the grinding shoe and grind it little by little, which is time-consuming and labor-intensive. Summary of the invention

[0004] The purpose of the present invention is to provide a side-opening strong magnetic salvage device to solve the problems existing in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a side-opening strong magnetic salvage device, comprising a base, a connecting joint is fixed on the upper part of the base, a baffle is fixedly welded on the cylindrical lower part of the base, a bottom plate is fixedly welded inside the semi-cylinder of the base, an insulating partition is arranged on the top of the bottom plate, a strong magnetic positioning block and a strong magnet are arranged on the top of the insulating partition, and the strong magnetic positioning block, the strong magnet, the insulating partition and the bottom plate are fixed together with screws.

[0006] Preferably, the thickness of the insulating partition is between 1 mm and 3 mm.

[0007] Preferably, the strong magnetic positioning block and the strong magnet are evenly arranged on the bottom plate in a group of two and fixed with screws.

[0008] Preferably, at least two paddles are arranged on the semi-cylindrical outer shell of the base body.

[0009] Preferably, high-carbon cobalt-chromium-tungsten wear-resistant alloy is welded on 1 / 3-1 / 2 of the shift plate.

[0010] Preferably, the surface of the bottom plate corresponding to the inner surface of the semi-cylinder is an inclined surface.

[0011] Preferably, the angle θ between the inclined surface and the axis is between 1° and 2°.

[0012] The beneficial effect of the present invention is that since a paddle is arranged on the outer side of the semi-cylinder of the new side-opening strong magnetic salvage device, a larger gap is created between the well wall and the semi-cylinder, which is beneficial to the return of drilling fluid and can protect the semi-cylinder from excessive wear, thereby extending the service life of the side-opening strong magnetic salvage device.

[0013] When using the existing side-opening strong magnetic salvage device to salvage fallen objects, the impact force of the drilling fluid and the magnetic force of the magnet are relied upon; the new side-opening strong magnetic salvage device not only uses the impact force of the drilling fluid and the magnetic force of the magnet, but also uses a mechanical method similar to prying or scraping to salvage fallen objects, which can improve the salvage efficiency and salvage success rate, reduce drilling risks, and save drilling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a new side-opening strong magnetic salvage device; Figure 2 is a top view of the present invention; Figure 3 yes Figure 1 Top view and AA section view; Figure 4 yes Figure 1 BB cross-sectional view. DETAILED DESCRIPTION

[0015] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figure 1 As shown, a side-opening strong magnetic salvage device comprises a base 2, a connecting joint 1 is fixed on the upper part of the base 2, and a thread 11 is arranged inside the connecting joint 1 for connecting with the upper drill string; a baffle 3 is fixedly welded to the lower part of the cylinder 201 of the base 2, and its main purpose is to seal and guide the drilling fluid; a bottom plate 6 is fixedly welded inside the semi-cylinder 202 of the base 2, an insulating partition 9 is arranged on the top of the bottom plate 6, and a strong magnetic positioning block 4 and a strong magnet 5 are arranged on the top of the insulating partition 9, and the strong magnetic positioning block 4 and the strong magnet 52 are uniformly arranged on the insulating partition 9 as a group, and the threaded holes on the strong magnetic positioning block 9, the strong magnet 5), the insulating partition 9 and the bottom plate 6 correspond to each other; and the strong magnetic positioning block 4, the strong magnet 5, the insulating partition 9 and the bottom plate 6 are fixed together with screws 8.

[0017] As a preferred solution, the insulating partition 9 can be made of stainless steel, copper, aluminum or other thin plates, and the thickness of the insulating partition 9 is between 1 mm and 3 mm.

[0018] As a preferred solution, at least two plates 7 are provided on the outer shell of the semi-cylinder 202 of the substrate 2. To improve the wear resistance of the plates 7, a high-carbon cobalt-chromium-tungsten wear-resistant alloy is welded on the surface of the plates 7 at 1 / 3-1 / 2 near the bottom of the well.

[0019] As a preferred solution, in order to make full use of the hydraulic impact of the drilling fluid, the surface corresponding to the inner surface of the bottom plate 6 and the semi-cylinder 202 is set to an inclined surface 601, and the angle θ10 between the inclined surface 601 and the axis is between 1° and 2°. At the same time, the closer to the bottom of the side-opening strong magnetic salvage device, the smaller the angle θ10.

[0020] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A side-opening strong magnetic salvage device, characterized in that: The invention comprises a base body 2, a connecting joint (1) is fixed on the upper part of the base body (2), a baffle plate (3) is fixedly welded on the lower part of the cylinder (201) of the base body (2), a bottom plate (6) is fixedly welded inside the semi-cylinder (202) of the base body (2), an insulating partition (9) is arranged on the top of the bottom plate (6), a strong magnetic positioning block (4) and a strong magnet (5) are arranged on the top of the insulating partition (9), and the strong magnetic positioning block (4), the strong magnet (5), the insulating partition (9) and the bottom plate (6) are fixed together by screws (8).

2. The side-opening strong magnetic salvage device according to claim 1, characterized in that: The thickness of the insulating partition (9) is between 1 mm and 3 mm.

3. The side-opening strong magnetic salvage device according to claim 1, characterized in that: The strong magnetic positioning blocks (4) and the strong magnets (5) are arranged in groups of two and are evenly arranged on the bottom plate (6) and fixed with screws (8).

4. The side-opening strong magnetic salvage device according to claim 1, characterized in that: At least two shifting plates (7) are arranged on the outer shell of the semi-cylindrical (202) of the base (2).

5. The side-opening strong magnetic salvage device according to claim 1, characterized in that: A high-carbon cobalt-chromium-tungsten wear-resistant alloy is welded on 1 / 3-1 / 2 of the shifting plate (7).

6. The side-opening strong magnetic salvage device according to claim 1, characterized in that: The surface of the bottom plate (6) corresponding to the inner surface of the semi-cylinder (202) is an inclined surface (601).

7. The side-opening strong magnetic salvage device according to claim 5, characterized in that: The angle θ(10) between the inclined surface (601) and the axis is between 1° and 2°.

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