Strong magnetic fisher for falling objects at bottom of well

Abstract

The utility model discloses a strong magnetic fisher for underground dropped objects, which comprises a supporting piece and a rolling assembly, and the rolling assembly is rotatably arranged in the supporting piece. The rolling assembly is provided with the magnetic attraction assembly in a locking mode through the positioning assembly. The rolling assembly comprises a mounting frame and a roller seat, the roller seat is rotationally connected with the supporting piece, the mounting frame is fixedly connected with the roller seat, the magnetic attraction assembly is arranged in the mounting frame, and the positioning assembly penetrates through the roller seat to be connected with the magnetic attraction assembly in a clamped mode. According to the utility model, the traditional mode of installing the magnetic attraction assembly by adopting a bolt piece is abandoned, so that the strong magnetic attraction assembly is convenient to replace, and the operation convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of well bottom salvaging, in particular to a strong magnetic salvaging device for objects dropped at the well bottom. Background Art

[0002] In the field of oilfield production, salvaging fallen objects in oil wells is a basic operation in the process of oil drilling and production. Different types of salvage tools can be selected according to the nature and specifications of the fallen objects.

[0003] At present, strong magnetic salvage devices are commonly used for salvaging. When salvaging some small metal objects or long objects, the contact area between the objects and the strong magnetic plate is small, and they are very likely to fall off when hit. In addition, the strong magnetic plate is generally installed on the salvage bracket by bolt connection. During the process of replacing the strong magnetic plate, multiple sets of bolts need to be frequently adjusted, and thread slippage is also likely to occur, affecting the installation stability of the strong magnetic plate. This will undoubtedly greatly increase the workload for replacing a batch of strong magnetic plates.

[0004] Publication No. CN115370314B discloses a strong magnetic fishing tool and a method for testing its magnetic properties. The outer wall of the core shaft of the strong magnetic fishing tool features multiple spaced ridges. The gaps between adjacent ridges create an impurity-receiving cavity, which stores impurities and increases the flow area of ​​the annulus. Slots are cut into the ridges to accommodate the magnetic strip structure, and the magnet is secured to the core shaft using end caps and a locking assembly.

[0005] The replacement of the magnet in the prior art requires the removal of the blocking cap and the locking assembly before the magnet can be removed, which reduces the replacement efficiency.

[0006] Publication No. CN218716653U discloses a downhole salvage limiter for directional wells. When metal fragments enter the overshot tube, the drill pipe drives the connecting rod upward. At this time, the spring pushes the sliding block to reset, so that the movable plate closes the overshot tube. After the overshot tube is closed, the metal fragments or other debris in the overshot tube can be effectively prevented from falling back into the well, thus avoiding secondary salvage.

[0007] The adsorption area of ​​the prior art is small, and the amount of metal that can be adsorbed in one trip is small.

[0008] Announcement No.: CN220415307U, discloses a magnetic salvage device, comprising a frame mechanism; a magnet mechanism; the magnet mechanism is mounted on the frame mechanism and is used to salvage objects dropped in an oil well by strong magnetic attraction; the frame mechanism lowers a steel wire rope, which passes through a wire-straightening wheel and places the magnet mechanism into the oil well, where it gradually descends to the bottom of the oil well to salvage metal objects dropped in the oil well.

[0009] This prior art is a traditional salvage device with a small magnetic contact surface.

[0010] In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from those of the present utility model. Regarding the more technical features, technical problems to be solved and the beneficial effects of the present utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0011] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a strong magnetic salvage device for dropped objects at the bottom of a well.

[0012] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0013] A strong magnetic salvage device for dropped objects at the bottom of a well, comprising a support member and a rolling assembly, wherein the rolling assembly is rotatably arranged inside the support member; the rolling assembly is locked with a magnetic attraction assembly through a positioning assembly; the rolling assembly comprises a mounting frame and a roller seat, wherein the roller seat is rotatably connected to the support member, the mounting frame is fixedly connected to the roller seat, the magnetic attraction assembly is arranged in the mounting frame, and the positioning assembly passes through the roller seat and is clamped with the magnetic attraction assembly.

[0014] Furthermore, the rolling assembly includes a mounting frame and two roller seats;

[0015] Specifically, two roller seats are arranged face to face, and the roller seats are disc-shaped;

[0016] Specifically, a mounting frame is fixedly connected between the two roller seats, and at least two mounting frames are provided and evenly distributed along the circumference of the roller seats, and the mounting frames are arranged along the radial direction of the roller seats;

[0017] Specifically, one or two roller seats are positioning roller seats, and a positioning component is provided on the end surface of the positioning roller seat connected to the rotary joint, and the positioning component passes through the positioning roller seat to lock the magnetic attraction component.

[0018] Furthermore, both sides of the mounting frame are provided with T-shaped embedding grooves, and the embedding grooves are open at one end of the mounting frame away from the center of the roller seat;

[0019] Specifically, the magnetic attraction component includes a strong magnetic plate, which is in the shape of a thin T-shaped plate. The strong magnetic plate is arranged in an embedded slot. A holding hole is provided at the end of the strong magnetic plate away from the fixed axis. A card slot is provided on the end face of the strong magnetic plate close to the positioning component, and the card slot is plugged into the positioning component for positioning.

[0020] Further, the positioning assembly includes a slide plate;

[0021] Specifically, the positioning roller seat is provided with a slide, the end of the slide close to the mounting frame is a semi-closed end, and the end of the slide away from the mounting frame is an open end;

[0022] Specifically, the slide is arranged in the slideway, and two clamping rods are fixed to the end surface of the slide facing the mounting frame. The two clamping rods correspond to the clamping slots on the two strong magnetic plates in the mounting frame. The shape of the clamping rod ends is adapted to the shape of the clamping slots. When the slide contacts the semi-closed end, the ends of the clamping rods are clamped in the clamping slots.

[0023] Specifically, the end surface of the slide plate facing the open end is connected with a spring pull rod assembly, and the spring pull rod assembly can control the position of the slide plate.

[0024] Furthermore, the portion of the clamping rod embedded in the clamping slot is designed to be non-circular.

[0025] Furthermore, the spring pull rod assembly includes a spring, a pull rod, and a pull plate;

[0026] Specifically, the pull rod is rotatably connected to the skateboard via a bearing, one end of the pull rod away from the bearing is fixedly connected to the pull plate, and the other end of the pull plate away from the pull rod is fixed with a handle;

[0027] Specifically, a sink is provided at the open end of the slideway, and the pull plate can sit in the sink;

[0028] Specifically, the slideway is threadedly connected to a retaining ring between the slide plate and the pull plate, a spring is arranged outside the pull rod, the spring is located between the slide plate and the retaining ring, and the spring is in a compressed state.

[0029] Furthermore, the support member is a U-shaped frame, which includes a horizontal portion and two downward fork arms, and the two fork arms are respectively connected to a roller seat through a rotary joint.

[0030] Furthermore, connecting shafts are respectively provided at both ends of the top of the horizontal portion.

[0031] Furthermore, a cleaning assembly is provided through the horizontal portion of the support member;

[0032] Specifically, the cleaning assembly includes a flushing pipe, which is clamped on the support member. At least two nozzles are provided at the bottom of the flushing pipe, and the nozzles face the rolling assembly. The top of the flushing pipe is connected to two water pipes.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The utility model pulls the pull plate to make the pull rod drive the slide to move, so that the slide drives the two clamping rods to disengage from the slots on the strong magnetic plate. When the pull plate is pulled out, the pull plate is rotated to make the pull plate drive the pull rod to rotate, so that one side of the pull plate contacts the side of the roller seat, which plays a role in limiting the pull plate and the pull rod and keeping the clamping rod out of the slots. The strong magnetic plate is pulled through the gripping hole so that the strong magnetic plate can be disengaged from the embedding slot and can be removed. When installing the strong magnetic plate, it is inserted into the embedding slot of the T-shaped design. After the strong magnetic plate is completely embedded in the mounting frame, the pull plate is rotated to make it correspond to the opening on one side of the roller seat. With the elastic force of the spring, the pull plate drives the clamping rod to be clamped into the slot on the strong magnetic plate through the pull rod and the slide, thereby achieving the purpose of locking the strong magnetic plate and abandoning the traditional method of using bolts to install the strong magnetic plate. This facilitates the replacement of the strong magnetic plate and improves the convenience of operation.

[0035] 2. The utility model installs four mounting frames between two roller seats, and installs strong magnetic plates on both sides of the mounting frames. As the two roller seats roll at the bottom of the well, the strong magnetic plates between the two adjacent mounting frames can adsorb metal objects. The accommodating groove formed by the gap between the two adjacent mounting frames can fully adsorb and store metal objects. The accommodating groove and the blocking of the two roller seats can prevent metal objects from falling due to collision, thereby further improving the strong magnetic salvage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of a strong magnetic salvage device for dropped objects at the bottom of a well according to the utility model;

[0037] Figure 2 This is a schematic diagram of the structure of the connection between the support member and the cleaning component in the utility model;

[0038] Figure 3 This is a schematic diagram of the structure of the strong magnetic plate and the mounting frame separated in the utility model;

[0039] Figure 4 yes Figure 3 A in the middle is an enlarged schematic diagram;

[0040] Figure 5 It is a structural schematic diagram of the connection between the roller seat and the positioning assembly in the utility model.

[0041] In the figure: 1. Support member; 2. Roller seat; 3. Fixed shaft; 4. Mounting frame; 5. Embedded slot; 6. Strong magnetic plate; 7. Grip hole;

[0042] 8. Positioning assembly; 801. Slide plate; 802. Clamping rod; 803. Bearing; 804. Spring; 805. Pull rod; 806. Pull plate;

[0043] 9. Slide; 10. Card slot;

[0044] 11. Cleaning assembly; 111. Flushing pipe; 112. Nozzle; 113. Water pipe;

[0045] 12. Rotary joint; 13. Connecting shaft. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Example 1:

[0048] See also Figures 1 to 5 The utility model provides a strong magnetic salvage device for dropped objects at the bottom of a well, comprising a support member 1, a cleaning component 11 being provided on the outer wall of the support member 1, a connecting component being provided on the outer wall of the support member 1, a rolling component being rotatably provided inside the support member 1, and a magnetic suction component being locked by a positioning component.

[0049] The support member 1 is a U-shaped frame, and the support frame 1 includes a horizontal portion and two downward fork arms.

[0050] The rolling assembly includes a roller seat 2, a fixed shaft 3, and a mounting frame 4. The two fork arms are connected to a roller seat 2 through a rotary joint 12 respectively. The two roller seats 2 are arranged face to face. A fixed shaft 3 is fixedly connected between the two roller seats 2. The roller seat 2 is disc-shaped. The mounting frame 4 is fixedly connected between the two roller seats 2. At least two mounting frames 4 are provided and are evenly distributed along the circumference of the roller seat 2. The mounting frame 4 is arranged radially along the roller seat 2. A magnetic attraction component is provided in the mounting frame 4, wherein one or two roller seats 2 are positioning roller seats. A positioning component is provided on the end face where the positioning roller seat is connected to the rotary joint 12, and the positioning component locks the magnetic attraction component; through the mutual cooperation between the rotary joint 12 and the roller seat 2, the roller seat 2 can rotate in the support 1 through the rotary joint 12. When the support 1 moves, the roller seat 2 can roll at the bottom of the well. The magnetic attraction component between the two adjacent mounting frames 4 can adsorb metal objects, expand the adsorption range, and reduce the resistance when the support 1 moves.

[0051] Specifically, in this embodiment, there are four mounting frames 4, and both sides of the mounting frames 4 are provided with T-shaped embedding grooves 5. The embedding grooves 5 are open at one end of the mounting frame 4 away from the center of the roller seat 2, and the magnetic attraction component is placed in the embedding grooves 5.

[0052] The magnetic attraction component includes a strong magnetic plate 6, which is in the shape of a thin T-shaped plate. The strong magnetic plate 6 is arranged in an embedding groove 5. A holding hole 7 is provided at the end of the strong magnetic plate 6 away from the fixed axis. A card slot 10 is provided on the end face of the strong magnetic plate 6 close to the positioning component. The card slot 10 is plugged into the positioning component for positioning. The thick plate part of the strong magnetic plate 6 has the largest contact area with the outside world and is used to absorb debris at the bottom of the well. Due to the provision of the embedding groove 5, the T-shaped embedding groove 5 can limit the strong magnetic plate 6, prevent the strong magnetic plate 6 from being taken out of the mounting frame 4 by metal objects, and improve the adsorption stability of the strong magnetic plate 6.

[0053] The positioning assembly 8 includes a slide 801, and the positioning roller seat is provided with a slide 9. The end of the slide 9 close to the mounting frame 4 is a semi-closed end, and the end of the slide 9 away from the mounting frame 4 is an open end. The slide 801 is arranged in the slide 9, and two clamping rods 802 are fixed on the end face of the slide 801 facing the mounting frame 4. The two clamping rods 802 correspond to the clamping grooves on the two strong magnetic plates 6 in the mounting frame 4. When the slide 801 contacts the semi-closed end, the end of the clamping rod 802 passes through the roller seat 2 and the mounting frame 4 and is clamped in the clamping groove 10. The part of the clamping rod 802 embedded in the clamping groove 10 is a non-circular design, and the shape of the end of the clamping rod 802 is adapted to the shape of the clamping groove 10. The end face of the slide 801 facing the open end is connected to a spring pull rod assembly, which can control the position of the slide 801.

[0054] The spring pull rod assembly includes a spring 804, a pull rod 805, and a pull plate 806. The pull rod 805 is rotatably connected to the slide 801 through a bearing 803. The slide 801 is clamped with the bearing 803. The end of the pull rod 805 is sleeved in the bearing 803. The end of the pull rod 805 away from the bearing 803 is fixedly connected to the pull plate 806. The end of the pull plate 806 away from the pull rod 805 is fixed with a handle. The open end of the slide 9 is provided with a sink groove, and the pull plate 806 can sit in the sink groove. The slide 9 is threadedly connected to a retaining ring between the slide 801 and the pull plate 806. The pull rod 805 is provided with a spring 804 on the outer surface, and the spring 804 is located between the slide 801 and the retaining ring. , the spring 804 is in a compressed state; because of the bearing 803, the pull rod 805 can rotate in the bearing 803, which is convenient for adjusting the angle of the pull plate 806, so that the pull plate 806 can contact the side of the roller seat 2 after it is disengaged from the sink groove and rotates, thereby limiting the pull plate 806 and the pull rod 805, and keeping the clamping rod 802 out of the clamping slot 10; when the pull plate 806 is sitting in the sink groove, the strong magnetic plate 6 can squeeze the clamping rod 802 when sliding in the embedded groove 5, so that the clamping rod 802 can slide on one side of the strong magnetic plate 6, and under the action of the spring 804, the clamping rod 802 and the clamping slot 10 are automatically connected after alignment, and there is no need to manually adjust the position of the clamping rod 802 to assist the positioning of the strong magnetic plate 6.

[0055] The connecting component is a connecting shaft 13, and connecting shafts 13 are respectively provided at both ends of the top of the horizontal part of the support member 1. A cleaning component 11 is provided through the horizontal part of the support member 1, and the cleaning component 11 includes a flushing pipe 111. The flushing pipe 111 is clamped on the support member 1, and at least two nozzles 112 are provided at the bottom of the flushing pipe 111. The top of the flushing pipe 111 is connected to two water pipes 113. Through the mutual cooperation between the flushing pipe 111 and the nozzle 112, as the support member 1 moves, the two roller seats 2 can drive the strong magnetic plates 6 on the four mounting frames 4 to rotate, and connect the water pipe 113 to the water source. The water is sprayed out from the nozzle 112 through the flushing pipe 111, so that the sprayed water can flush the salvaged metal objects, reduce the salvage weight, and thus improve the salvage efficiency.

[0056] Example 2:

[0057] Based on Example 1, this embodiment provides a method for using a strong magnetic salvage device for dropped objects at the bottom of a well, comprising the following steps:

[0058] S1. Connect the lifting equipment on the well through two connecting shafts 13, connect the two water pipes 113 to the flushing liquid pipeline, and lower them into the well;

[0059] S2. The support member 1 drives the two roller seats 2 to roll at the bottom of the well. As the two roller seats 2 roll at the bottom of the well, the strong magnetic plate 6 between the two adjacent mounting frames 4 can adsorb the metal objects. The receiving groove formed by the gap between the two adjacent mounting frames 4 can fully adsorb and store the metal objects. The flushing liquid is sprayed from the nozzle 112 to clean the adsorbed and stored metal objects, reducing the weight. When the adsorption reaches the rated weight, it is lifted out.

[0060] S3. When replacing the strong magnetic plate 6, pull the pull plate 806 to make the pull rod 805 drive the slide plate 801 to move, and the slide plate 801 drives the two clamping rods 802 to disengage from the clamping slot 10 on the strong magnetic plate 6. After the pull plate 806 is pulled out, rotate the pull plate 806 to drive the pull rod 805 to rotate. At this time, one side of the pull plate 806 contacts the side of the roller seat 2, and the strong magnetic plate 6 is pulled through the gripping hole 7 so that the strong magnetic plate 6 can be disengaged from the embedded slot 5 and can be removed;

[0061] When installing the strong magnetic plate 6, insert it into the embedding slot 5. After the strong magnetic plate 6 is completely embedded in the mounting frame 4, rotate the pull plate 806 so that it corresponds to the opening on one side of the roller seat 2. Cooperate with the elastic force of the spring 804 to make the pull plate 806 drive the clamping rod 802 through the pull rod 805 and the slide plate 801 to be clamped into the clamping slot 10 on the strong magnetic plate 6.

[0062] All components not discussed in detail in this application and the connection methods of the components in this application are well-known technologies in the technical field and can be directly applied without further explanation.

[0063] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0064] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0065] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A strong magnetic salvage device for dropped objects at the bottom of a well, comprising a support member, characterized in that: It also includes a rolling assembly, wherein the rolling assembly is rotatably arranged in the support member; The rolling component is locked with the magnetic component through the positioning component; The rolling assembly includes a mounting frame and a roller seat. The roller seat is rotatably connected to the support member, the mounting frame is fixedly connected to the roller seat, the magnetic attraction assembly is arranged in the mounting frame, and the positioning assembly passes through the roller seat and is clamped with the magnetic attraction assembly.

2. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 1, characterized in that: The rolling assembly includes a mounting frame and two roller seats; Two roller seats are arranged face to face, and the roller seats are disc-shaped; A mounting frame is fixedly connected between the two roller seats, and at least two mounting frames are provided and evenly distributed along the circumference of the roller seats, and the mounting frames are arranged along the radial direction of the roller seats; One or two roller seats are positioning roller seats. The end surface of the positioning roller seat connected to the rotary joint is provided with a positioning component, and the positioning component passes through the positioning roller seat to lock the magnetic attraction component.

3. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 2, characterized in that: Both sides of the mounting frame are provided with T-shaped embedding grooves, and the embedding grooves are open at one end of the mounting frame away from the center of the roller seat; The magnetic attraction component includes a strong magnetic plate, which is in the shape of a thin T-shaped plate. The strong magnetic plate is arranged in an embedded slot. A holding hole is provided at the end of the strong magnetic plate away from the fixed axis. A card slot is provided on the end face of the strong magnetic plate close to the positioning component, and the card slot is plugged into the positioning component for positioning.

4. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 3, characterized in that: The positioning assembly includes a slide plate; The positioning roller seat is provided with a slideway, the end of the slideway close to the mounting frame is a semi-closed end, and the end of the slideway away from the mounting frame is an open end; The slide is arranged in the slideway, and two clamping rods are fixed to the end surface of the slide facing the mounting frame. The two clamping rods correspond to the clamping slots on the two strong magnetic plates in the mounting frame. The shape of the clamping rod ends is adapted to the shape of the clamping slots. When the slide contacts the semi-closed end, the ends of the clamping rods are clamped in the clamping slots. The end surface of the slide plate facing the open end is connected with a spring pull rod assembly, and the spring pull rod assembly can control the position of the slide plate.

5. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 4, characterized in that: The portion of the clamping rod that is embedded in the clamping slot is designed to be non-circular.

6. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 4, characterized in that: The spring pull rod assembly includes a spring, a pull rod, and a pull plate; The pull rod is rotatably connected to the skateboard via a bearing, one end of the pull rod away from the bearing is fixedly connected to the pull plate, and the other end of the pull plate away from the pull rod is fixed with a handle; A sink is provided at the open end of the slideway, and the pull plate can sit in the sink; The slideway is threadedly connected to a retaining ring between the slide plate and the pull plate. A spring is arranged outside the pull rod. The spring is located between the slide plate and the retaining ring and is in a compressed state.

7. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 2, characterized in that: The support member is a U-shaped frame, and the support member includes a horizontal portion and two downward fork arms, and the two fork arms are respectively connected to a roller seat through a rotary joint.

8. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 7, characterized in that: Two ends of the top of the horizontal portion are respectively provided with connecting shafts.

9. A strong magnetic salvage device for dropped objects at the bottom of a well according to claim 7, characterized in that: A cleaning assembly is provided through the horizontal portion of the support member; The cleaning assembly includes a flushing pipe, which is clamped on the support member. At least two nozzles are provided at the bottom of the flushing pipe, and the nozzles face the rolling assembly. The top of the flushing pipe is connected to two water pipes.

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