Side opening type strong magnetic fisher

Abstract

The invention relates to a side opening type strong magnetic fisher, relates to the technical field of petroleum drilling equipment, and is used for solving the problem that a fisher is low in success rate of fishing cylindrical falling objects. The device comprises: an upper joint, one end of which is connected with an upper tubular column; one end of the outer cylinder is connected with the other end of the upper connector, and a side opening notch is formed in one side of the outer cylinder; the magnetic attraction assembly is arranged in the outer barrel, a groove is formed in the magnetic attraction assembly, and the groove protrudes towards the end, away from the side opening notch, of the outer barrel; wherein the groove is used for placing an underground fallen object, the magnetic attraction assembly can generate magnetic force, and the underground fallen object is fixed in the groove in a magnetic attraction mode through the magnetic force. The groove is formed in the magnetic attraction assembly, so that the downhole falling object can be stably placed in the groove under the action of the gravity of the downhole falling object, and the shaking amount of the downhole falling object can be reduced through the groove. And the magnetic attraction assembly has strong magnetism, so that the underground fallen objects can be magnetically attracted and fixed in the groove. Therefore, falling objects in the well are fixed in the outer cylinder and are prevented from falling out of the outer cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling equipment, in particular to a side-opening strong magnetic salvage device. Background Art

[0002] At present, salvage devices are used to salvage objects in wells. Usually, the objects in wells are small iron objects. The salvage devices in the related art can salvage normally. When the objects in the well are cylindrical objects in a highly deviated well or a horizontal well, the salvage devices in the related art are limited by their own structure, and the objects in the well are easy to fall out of the salvage devices. This results in a low success rate of salvage by the salvage devices.

[0003] That is to say, the salvage device in the related art has the problem of low success rate in salvaging cylindrical objects. Summary of the invention

[0004] The invention provides a side-opening strong magnetic salvage device, which is used to solve the problem that the success rate of the salvage device in salvaging cylindrical fallen objects is low.

[0005] The present invention provides a side-opening strong magnetic salvage device, comprising: an upper joint, one end of which is connected to an upper pipe column; and an outer tube, one end of which is connected to the other end of the upper joint, and one side of the outer tube is provided with a side-opening notch; and a magnetic attraction component, which is arranged in the outer tube, and the magnetic attraction component is provided with a groove, and the groove protrudes toward one end of the outer tube away from the side-opening notch; wherein the groove is used to place fallen objects in the well, and the magnetic attraction component can generate magnetic force, and the fallen objects in the well are fixed in the groove in a magnetic attraction manner through the magnetic force.

[0006] In one embodiment, the magnetic attraction component includes: a support structure, which is fixed in an outer cylinder; and a box body, which is arranged on the support structure; and a magnet assembly, which is arranged in the box body, and the magnet assembly generates magnetic force; wherein, the support structure and the magnet assembly define a groove, and when objects dropped in the well are placed in the groove, the magnet assembly contacts the objects dropped in the well to magnetically fix them.

[0007] In one embodiment, the supporting structure includes: a first baffle, which is obliquely arranged in the outer cylinder, and one end of the first baffle is fixed to the inner wall of one side of the outer cylinder; and a second baffle, which is obliquely arranged in the outer cylinder, and one end of the second baffle is fixed to the inner wall of the other side of the outer cylinder; and wherein one end of the box body is connected to the other end of the first baffle, and the other end of the box body is connected to the other end of the second baffle, and the upper end surface of the first baffle, the upper end surface of the second baffle and the upper end surface of the magnet assembly define a groove.

[0008] In one embodiment, the groove is a V-shaped groove.

[0009] In one embodiment, the connection point between the upper end surface of the magnet assembly and the upper end surface of the first baffle is the groove bottom point d of the groove, and the groove bottom point d is located on the left side of the vertical mid-plane A of the outer cylinder.

[0010] In one embodiment, the magnet assembly includes: a plurality of magnets arranged in the box body at intervals along the length direction of the box body; and a magnetic plate arranged between two adjacent magnets.

[0011] In one embodiment, an opening is provided at one end of the box body, and the opening is used to install a plurality of magnets and magnetic plates into the box body along the length direction of the box body.

[0012] In one embodiment, it also includes a water eye baffle, which is arranged in the outer cylinder and located at the lower end of the magnetic attraction component. The water eye baffle divides the outer cylinder into a first cavity and a second cavity that is not connected to the first cavity. The magnetic attraction component is arranged in the first cavity, and the second cavity is connected to the water eye hole of the upper joint.

[0013] In one embodiment, a fork guide shoe is provided at one end of the outer tube away from the upper joint.

[0014] In one embodiment, a guide plate is further included. The guide plate is disposed in the outer tube and located at an end of the outer tube away from the upper joint. The guide plate is used to guide the fallen objects in the well into the groove.

[0015] Compared with the prior art, the advantage of the present invention is that a groove is provided in the magnetic suction component, so that the fallen objects in the well can be stably placed in the groove under the action of their own gravity, and at the same time, the groove has a limiting function, which can reduce the shaking of the fallen objects in the well. Moreover, the magnetic suction component has strong magnetism, so that the fallen objects in the well can be magnetically fixed in the groove. Thereby, it is convenient to salvage it from the well together with the side-opening strong magnetic salvage device. Compared with the salvage device in the related art, this magnetic suction component with a groove structure can limit the shaking of the fallen objects in the well through the groove, and at the same time generate magnetic force to magnetically fix the fallen objects in the well. Thereby, it is ensured that the fallen objects in the well can be fixed in the outer cylinder, and it is prevented from escaping from the outer cylinder due to external force. Thereby, the success rate of the salvage device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the structural composition of a side-opening strong magnetic salvage device in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Cross-sectional view of the mid-side open-type strong magnetic salvage device at AA.

[0019] Reference numerals:

[0020] 10. Upper joint; 11. Water eye hole; 20. Outer tube; 21. Side notch; 211. Left side end; 212. Right side end; 30. Magnetic attraction assembly; 31. Support structure; 311. First baffle plate; 312. Second baffle plate; 32. Box body; 33. Magnet assembly; 331. Magnet; 332. Magnetic plate; 34. Groove; 40. Water eye baffle plate; 50. Pull-out fork guide shoe; 60. Guide plate; 100. Fallen objects in the well. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] It should be noted that the side-opening strong magnetic salvage device in the present application is mainly used for highly deviated wells and horizontal wells. It is used to salvage the downhole objects 100 in the well. The downhole objects 100 in the present application are an irregular cylindrical structure. Its outer diameter is 44mm, its length is 820mm, its weight is relatively light, and its magnetism is poor. Specifically, the upper part of the downhole object 100 is 370mm long, it is made of copper material, and is non-magnetic. Its lower part is 150mm long, it is made of copper material, and is non-magnetic. The middle material is tungsten steel, which has weak magnetism.

[0023] like Figure 1 and 2 As shown, the present invention provides a side-opening strong magnetic salvage device, which includes an upper joint 10, an outer tube 20 and a magnetic suction assembly 30. Among them, one end of the upper joint 10 is connected to the upper pipe column; one end of the outer tube 20 is connected to the other end of the upper joint 10, and one side of the outer tube 20 is provided with a side-opening notch 21; the magnetic suction assembly 30 is arranged in the outer tube 20, and the magnetic suction assembly 30 is provided with a groove 34, which protrudes toward one end of the outer tube 20 away from the side-opening notch 21; the groove 34 is used to place the downhole object 100, and the magnetic suction assembly 30 can generate magnetic force, and the downhole object 100 is fixed in the groove 34 in a magnetic suction manner through the magnetic force.

[0024] In the above configuration, a groove 34 is provided in the magnetic suction component 30, so that the fallen object 100 in the well can be stably placed in the groove 34 under the action of its own gravity, and the groove 34 has a limiting function, which can reduce the shaking of the fallen object 100 in the well. Moreover, the magnetic suction component 30 has strong magnetism, so that the fallen object 100 in the well can be magnetically fixed in the groove 34. Thereby, it is convenient to salvage it from the well together with the side-opening strong magnetic salvage device. Compared with the salvage device in the related art, the magnetic suction component 30 with a groove structure can limit the shaking of the fallen object 100 in the well through the groove 34, and generate magnetic force to magnetically fix the fallen object 100 in the well. Thereby, it is ensured that the fallen object 100 in the well can be fixed in the outer tube 20, and it is prevented from being dislodged from the outer tube 20 by external force. Thereby, the success rate of the salvage device is improved.

[0025] Specifically, Figure 1 and2 As shown, in one embodiment, the magnetic attraction assembly 30 includes a support structure 31, a box body 32 and a magnet assembly 33. The support structure 31 is fixed in the outer cylinder 20, the box body 32 is arranged in the support structure 31, and the magnet assembly 33 is arranged in the box body 32, and the magnet assembly 33 generates magnetic force. The support structure 31 and the magnet assembly 33 define a groove 34, and when the downhole object 100 is placed in the groove 34, the magnet assembly 33 contacts the downhole object 100 to magnetically fix it.

[0026] It should be noted that the magnet assembly 33 is partially in contact with the downhole object 100 , so that the downhole object 100 is magnetically fixed by the magnet assembly 33 . Meanwhile, the magnet assembly 33 serves as a component of the groove 34 .

[0027] Specifically, Figure 1 and 2 As shown, in one embodiment, the support structure 31 includes a first baffle 311 and a second baffle 312. The first baffle 311 is tiltedly arranged in the outer cylinder 20, and one end of the first baffle 311 is fixed to the inner wall of one side of the outer cylinder 20; the second baffle 312 is tiltedly arranged in the outer cylinder 20, and one end of the second baffle 312 is fixed to the inner wall of the other side of the outer cylinder 20; one end of the box body 32 is connected to the other end of the first baffle 311, and the other end of the box body 32 is connected to the other end of the second baffle 312, and the upper end surface of the first baffle 311, the upper end surface of the second baffle 312 and the upper end surface of the magnet assembly 33 define a groove 34.

[0028] Specifically, Figure 1 and 2 As shown, in one embodiment, the first baffle 311 and the second baffle 312 are straight plates.

[0029] Specifically, Figure 1 and 2 As shown, in one embodiment, the groove 34 is a V-shaped groove. The box body 32 is disposed between the first baffle 311 and the second baffle 312 .

[0030] Of course, in alternative embodiments not shown in the drawings of the present application, the first baffle plate 311 and the second baffle plate 312 may be arc-shaped plates, and the groove 34 may be configured as an arc-shaped groove.

[0031] It should be noted that the horizontal mid-plane B in the present application is a cross section that divides the outer cylinder 20 into two halves in the horizontal direction. The horizontal mid-plane A in the present application is a cross section that divides the outer cylinder 20 into two halves in the vertical direction.

[0032] Specifically, Figure 1 and 2As shown, in one embodiment, the connection point between the upper end surface of the magnet assembly 33 and the upper end surface of the first baffle 311 is the groove bottom point d of the groove 34, and the groove bottom point d is located on the left side of the vertical center plane A of the outer cylinder 20. In the above configuration, the groove bottom point d is located on the left side of the vertical center plane A of the outer cylinder 20, so that most of the downhole objects 100 are located in the magnetic field generated by the magnet assembly 33. This ensures that the magnet assembly 33 generates sufficient magnetic force to magnetically fix the downhole objects 100. This improves the success rate of the salvage device.

[0033] Specifically, Figure 1 and 2 As shown, in one embodiment, the magnet assembly 33 includes a plurality of magnets 331 and a plurality of magnetic plates 332. The plurality of magnets 331 are arranged in the box body 32 at intervals along the length direction of the box body 32; and a single magnetic plate 332 is arranged between two adjacent magnets 331.

[0034] In the above configuration, this arrangement increases the attraction force of the magnet of the magnet assembly 33, thereby ensuring that the magnet assembly 33 generates sufficient magnetic force to magnetically fix the downhole object 100, thereby improving the success rate of the salvage device.

[0035] It should be noted that the magnetic plate 332 cannot be too thick, otherwise the magnetic field formed by the magnets 331 and 331 is too weak to attract the downhole objects 100. The magnetic plate 332 cannot be too thin, otherwise the magnets 331 and 331 will interfere with each other and cannot form an overall magnetic field.

[0036] All magnets 331 and magnetic plates 332 in the present application are assembled in the magnetic grooves of the box body 32 to form a magnet assembly 33 with an overall magnetic field.

[0037] Specifically, in one embodiment, the thickness of the magnetic plate 332 is 8 mm.

[0038] Specifically, Figure 1 and 2 As shown, in one embodiment, an opening is provided at one end of the box body 32 , and the opening is used to install multiple magnets 331 and magnetic plates 332 into the box body 32 along the length direction of the box body 32 .

[0039] Specifically, Figure 1 and 2 As shown, in one embodiment, the side-opening strong magnetic salvage device also includes a water eye baffle 40, which is arranged in the outer cylinder 20 and located at the lower end of the magnetic suction component 30. The water eye baffle 40 divides the outer cylinder 20 into a first cavity and a second cavity that is not connected to the first cavity. The magnetic suction component 30 is arranged in the first cavity, and the second cavity is connected to the water eye hole 11 of the upper joint 10.

[0040] In the above arrangement, mud is pumped into the second cavity through the water eye 11 of the upper joint 10 for flushing, and the downhole objects 100 are suspended by circulating mud at a large displacement, so that the downhole objects 100 can enter the groove 34 of the side-opening strong magnetic salvage device conveniently when the upper pipe string is lowered. Since the magnetic suction component 30 of the side-opening strong magnetic salvage device stays in the well for a long time, the mud below also plays a role in cooling the magnetic suction component 30. This ensures that the side-opening strong magnetic salvage device can work stably and efficiently.

[0041] It should be noted that the water eye 11 is connected to the central channel of the upper connector 10, and the diameter of the water eye 11 is set to 51 mm. Its diameter cannot be too large, otherwise it will affect the operation of the above instruments. The upper connector 10 is not connected to the first cavity. The purpose of not being connected is to prevent the magnet 331 from sucking up the downhole object 100, and then washing away the downhole object 100 during mud flushing.

[0042] Specifically, Figure 1 and 2 As shown, in one embodiment, the upper end of the water eye baffle 40 is welded and fixed to the box body 32 to support the box body 32 and the magnet assembly 33.

[0043] Specifically, Figure 1 and 2 As shown, in one embodiment, a fork guide shoe 50 is provided at one end of the outer tube 20 away from the upper joint 10. When the downhole object 100 is not centered or close to the well wall, the downhole object 100 can be pulled into the side-opening strong magnetic salvage device by rotating the side-opening strong magnetic salvage device and using the fork guide shoe 50, thereby improving the salvage success rate of the salvage device.

[0044] Specifically, Figure 1 and 2 As shown, in one embodiment, the side-opening strong magnetic salvage device further includes a guide plate 60, which is disposed in the outer tube 20 and located at an end of the outer tube 20 away from the upper joint 10, and the guide plate 60 is used to guide the fallen objects 100 in the well into the groove 34.

[0045] In the above arrangement, the guide plate 60 has a guiding function, and is used to guide the downhole objects 100 into the first cavity of the outer cylinder 20 , thereby ensuring that the downhole objects 100 can be placed in the groove 34 later.

[0046] Specifically, Figure 1 and 2 As shown, in one embodiment, the guide plate 60 is a plate body with a certain slope. The slope can be used to guide the downhole objects 100 into the first cavity of the outer cylinder 20.

[0047] Specifically, in one embodiment, the slope of the guide plate 60 is 22 degrees.

[0048] Specifically, Figure 1 and 2 As shown, in one embodiment, the left side end 211 of the side opening notch 21 is higher than the right side end 212 of the side opening notch 21 .

[0049] It should be noted that when the upper pipe string pushes the downhole object 100 a certain distance, usually about 2 meters, the side-opening strong magnetic salvage device is rotated so that the magnet 331 faces upward. Since the outer cylinder 20 is higher on the left and lower on the right, the downhole object 100 enters the salvage device under the action of its own gravity when the side-opening strong magnetic salvage device rotates. The downhole object 100 enters the V-shaped groove of the salvage device. The magnetism of the magnet 331 attracts the downhole object 100.

[0050] Specifically, in one embodiment, the inner diameter of the outer cylinder 20 is 174 mm, and the outer diameter of the outer cylinder is 200 mm.

[0051] Specifically, in one embodiment, the height n1 of the left side end 211 of the side opening 21 is 125 mm.

[0052] Specifically, in one embodiment, the height n2 of the right side end 212 of the side opening 21 is 100 mm.

[0053] Specifically, Figure 1 and 2 As shown, in one embodiment, the first baffle 311 and the horizontal mid-plane B of the outer cylinder 20 have an included angle β, and the value of the included angle β is: the included angle β is equal to 33°.

[0054] Specifically, Figure 1 and 2 As shown, in one embodiment, the second baffle 312 and the horizontal midplane B of the outer cylinder 20 have an included angle γ, and the value of the included angle γ is: the included angle γ is equal to 31°.

[0055] Specifically, Figure 1 and 2 As shown, in one embodiment, the magnet assembly 33 and the horizontal midplane B of the outer cylinder 20 have an included angle M, and the value of the included angle M is: the included angle β is equal to 22°.

[0056] Of course, the angle γ and the angle β can be set to be the same according to actual conditions.

[0057] It should be noted that, although the angles of the angle γ and the angle β in the present application are different, they are relatively close. In view of this, the groove 34 can be defined as a V-shaped groove.

[0058] It should be noted that the first baffle 311 and the second baffle 312 are both made of stainless steel plates, and the function of the stainless steel plates is to prevent magnetic interference. If they are replaced with magnetic steel plates, the magnetism of the magnet 331 will be weakened. The weak magnetism of the magnet plus the influence of temperature will not be able to attract the fallen objects and will fall off, resulting in salvage failure.

[0059] It should be noted that if Figure 1 and 2 As shown, in one embodiment, a large bevel angle of 45 degrees is set at the rear end of the side opening notch 21. This ensures that the magnet 331 will not encounter resistance when pushing the side opening strong magnetic fishing device downward.

[0060] According to the description of the above specific embodiments, a groove is provided in the magnetic suction component, so that the fallen objects in the well can be stably placed in the groove under the action of their own gravity, and at the same time, the groove has a limiting function, which can reduce the shaking of the fallen objects in the well. Moreover, the magnetic suction component has strong magnetism, so that the fallen objects in the well can be magnetically fixed in the groove. Thereby, it is convenient to salvage it from the well together with the side-opening strong magnetic salvage device. Compared with the salvage device in the related art, this magnetic suction component with a groove structure can limit the shaking of the fallen objects in the well through the groove, and at the same time generate magnetic force to magnetically fix the fallen objects in the well. Thereby, it is ensured that the fallen objects in the well can be fixed in the outer tube, and it is prevented from escaping from the outer tube due to external force. Thereby, the success rate of the salvage device is improved.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A side-opening strong magnetic salvage device, characterized in that: include: An upper joint (10), one end of which is connected to the upper pipe column; as well as An outer cylinder (20), one end of which is connected to the other end of the upper joint (10), and a side opening notch (21) is provided on one side of the outer cylinder (20); as well as A magnetic attraction component (30) is arranged in the outer cylinder (20), and the magnetic attraction component (30) is provided with a groove (34), and the groove (34) protrudes toward an end of the outer cylinder (20) away from the side opening notch (21); The groove (34) is used to place the fallen object (100) in the well, and the magnetic attraction component (30) can generate magnetic force to fix the fallen object (100) in the well in the groove (34) in a magnetic attraction manner through the magnetic force.

2. The side-opening strong magnetic salvage device according to claim 1, characterized in that: The magnetic attraction component (30) comprises: a supporting structure (31) fixed inside the outer cylinder (20); and A box body (32) is arranged on the supporting structure (31); and A magnet assembly (33) is arranged in the box body (32), and the magnet assembly (33) generates the magnetic force; The support structure (31) and the magnet assembly (33) define the groove (34), and when the downhole object (100) is placed in the groove (34), the magnet assembly (33) contacts the downhole object (100) to magnetically fix it.

3. The side-opening strong magnetic salvage device according to claim 2, characterized in that: The support structure (31) comprises: A first baffle (311) is obliquely disposed in the outer cylinder (20), one end of the first baffle (311) being fixed to an inner wall of one side of the outer cylinder (20); and A second baffle (312) is obliquely disposed in the outer cylinder (20), and one end of the second baffle (312) is fixed to the inner wall of the other side of the outer cylinder (20); and One end of the box body (32) is connected to the other end of the first baffle (311), and the other end of the box body (32) is connected to the other end of the second baffle (312); the upper end surface of the first baffle (311), the upper end surface of the second baffle (312) and the upper end surface of the magnet assembly (33) define the groove (34).

4. The side-opening strong magnetic salvage device according to claim 3, characterized in that: The groove (34) is a V-shaped groove.

5. The side-opening strong magnetic salvage device according to claim 3, characterized in that: The connection point between the upper end surface of the magnet assembly (33) and the upper end surface of the first baffle (311) is the groove bottom point d of the groove (34), and the groove bottom point d is located on the left side of the vertical center plane A of the outer cylinder (20).

6. The side-opening strong magnetic salvage device according to claim 2, characterized in that: The magnet assembly (33) comprises: A plurality of magnets (331) are arranged in the box body (32) at intervals along the length direction of the box body (32); and The magnetic plate (332) is arranged between two adjacent magnets (331).

7. The side-opening strong magnetic salvage device according to claim 6, characterized in that: An opening is provided at one end of the box body (32), and the opening is used to install a plurality of magnets (331) and the magnetic plates (332) into the box body (32) along the length direction of the box body (32).

8. The side-opening strong magnetic salvage device according to claim 1, characterized in that: It also includes a water eye baffle (40), which is arranged in the outer cylinder (20) and located at the lower end of the magnetic attraction component (30), and the water eye baffle (40) divides the outer cylinder (20) into a first cavity and a second cavity that is not connected to the first cavity, the magnetic attraction component (30) is arranged in the first cavity, and the second cavity is connected to the water eye hole (11) of the upper joint (10).

9. The side-opening strong magnetic salvage device according to claim 1, characterized in that: A fork guide shoe (50) is provided at one end of the outer cylinder (20) away from the upper joint (10).

10. The side-opening strong magnetic salvage device according to claim 1, characterized in that: It also includes a guide plate (60), which is arranged in the outer tube (20) and located at an end of the outer tube (20) away from the upper joint (10), and the guide plate (60) is used to guide the downhole objects (100) into the groove (34).

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