A strong magnetic iron filings collection and salvage tool

Abstract

The present invention is applicable to the operation links of collecting iron filings such as casing windowing and milling, and can provide a strong magnet iron filing collecting and salvaging tool with high adsorption efficiency, simple operation and quick iron filing cleaning, which includes variable legs, a handle, a magnet cylinder, a non-magnetic cylinder, a group of non-magnetic conductors, a group of strong magnets, a connecting sleeve, a sealing ring, etc. A group of non-magnetic conductors are arranged in series at intervals among a group of strong magnets to ensure uniform distribution of the magnetic force of the magnet group, with a large contact area and more efficient adsorption; the variable legs are equilateral triangular plates, and the distances from the center position of the hole to the three sides are not equal. Different placement heights of the magnet cylinder can be obtained by selecting different placement surfaces during use; the legs are inserted at both ends of the magnet cylinder, and the handle is connected to it through threads and is equivalent to a set screw to fasten the magnet cylinder and the legs. Thus, the legs and the magnet cylinder can be quickly disassembled by loosening the handle threads to quickly clean the collected iron filings.

Description

Technical Field

[0001] The invention relates to a tool for collecting and salvaging iron chips mixed with drilling fluid in the field of oil and gas exploration and development drilling engineering, and in particular to a strong magnetic chip collection and salvage tool for efficiently collecting and salvaging and quickly cleaning the obtained iron chips. Background Art

[0002] In the process of establishing wellbores for oil and gas exploration and development, for the purpose of reducing costs and increasing efficiency, the process of using old wellbores or sharing existing wellbores to establish new wellbores is often adopted. The necessary operation link of this process is casing window opening or casing segment milling. In the process of breaking the casing, except for a very small part of the iron filings generated that sink to the bottom of the well, the rest of the iron filings are mixed with the drilling fluid and returned to the wellhead. The iron filings are large and small in size and in various shapes. The larger iron filings can be cleaned out of the drilling fluid after being processed by the vibrating screen, while the smaller iron filings can still remain in the drilling fluid after being processed by the multi-stage solid control system, thereby polluting the drilling fluid. The main hazard of the smaller iron filings mixed in the drilling fluid is to interfere with the downhole magnetic measurement and control instruments. When the drilling fluid containing iron filings flows through the magnetic instrument, it is adsorbed and accumulated at the relevant position of the magnetic instrument, interfering with the instrument's measurement accuracy and signal transmission, thereby causing instrument failure. The larger iron filings are trapped on the vibrating screen due to their irregular shapes, damaging the vibrating screen or reducing the working efficiency of the vibrating screen. With the advancement of drilling technology, the use of drilling tools and instruments has become a basic configuration for drilling operations. Removing iron filings generated by various operations is a basic procedure in the operation process and a basic requirement for drilling fluid treatment.

[0003] At present, the salvage of iron chips in drilling operations is mainly carried out at the transition point between the wellhead diversion trough and the vibrating screen. Strong magnets are placed in the drilling fluid flow to absorb the iron chips in the fluid flow. However, there are problems such as incomplete collection and salvage of iron chips, low efficiency of iron chip cleaning, poor working environment for personnel, and non-standard and irregular salvage operations. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the deficiencies of the prior art, a strong magnetic scrap collection and salvage tool is provided which has high adsorption efficiency, is easy to use and can quickly clean the adsorbed iron scraps.

[0005] To achieve the above purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0006] A strong magnet chip collection and salvage tool includes variable legs, a handle, a magnet cylinder, a non-magnetic cylinder, a group of non-magnetic conductors, a group of strong magnets, and a connecting sleeve. Among them: A group of short cylindrical strong magnets are arranged in series at intervals with cylindrical non-magnetic conductors in the middle, placed in the magnet cylinder, and limited at both ends by retaining rings. The magnetic pole axis of a single strong magnet coincides with the axis of the magnet cylinder. The non-magnetic conductor is placed in the middle of a single strong magnet to block the connection of magnetic force lines between adjacent single strong magnets, so that the magnetic force lines of a single strong magnet are closed at the head and tail, and thus the magnetic force of the entire group of strong magnets is evenly distributed, with a large contact area and more efficient adsorption. The connecting sleeves are respectively inserted at both ends of the magnet cylinder. The handle is connected to the connecting sleeve by a thread and is equivalent to a set screw to fasten the magnet cylinder and the connecting sleeve. The outside of the magnet cylinder is a non-magnetic cylinder made of non-magnetic metal material or plastic.

[0007] The variable leg mentioned in the present invention is an equilateral triangular plate with a rounded tip. There is a non-through connecting hole in the middle. The distance from the center of the hole to the three sides is unequal, and the size of the distance is marked by a round hole arranged at the position of the opposite vertex of the side where it is located. The diameter of the round hole with the largest mark has the largest distance to the opposite side, and vice versa. Different placement surfaces can be selected during the use of the tool to obtain different placement heights of the magnet cylinder.

[0008] The connecting sleeve mentioned in the present invention is a sleeve-shaped rotating body. There is a groove on the inner side for placing a sealing ring, and there are steps on the outside. Three threaded holes are arranged perpendicular to the radial direction of the sleeve axis on the steps. The connecting sleeve is welded to the variable leg, and the direction of the threaded holes is perpendicular to the relative support surface of the variable leg.

[0009] The non-magnetic cylinder mentioned in the present invention is a thin-walled barrel-shaped body. The two ends are leg shields. The whole is made of non-magnetic metal material or plastic. Each of the two leg shields at both ends has a limit bayonet, and the size and shape are suitable for the handle to disassemble the magnet. A sealing ring is built into the connecting sleeve to prevent the inside of the magnet cylinder from being contaminated by the outside.

[0010] The use process of the strong magnet chip collection and salvage tool mentioned in the present invention is as follows: According to the size and shape of the connection and transition position between the diversion groove and the vibrating screen, as well as the mud flow rate, select the appropriate placement height of the strong magnet and the number of tools. Multiple tools are placed in groups in the mud flow to efficiently adsorb iron chips of various sizes mixed in the mud. The adsorbed iron chips accumulate on the outer wall of the non-magnetic cylinder. When cleaning the iron chips, loosen the handle thread, disassemble the legs and the magnet cylinder, and the iron chips adsorbed on the outer wall of the non-magnetic cylinder lose their magnetic force and completely fall off. Reassembling the legs, the magnet cylinder, and the non-magnetic cylinder can continue the salvage operation.

[0011] The present invention has the following beneficial effects:

[0012] 1. The strong magnet group is composed of single independent strong magnets, with a large contact area, constant magnetic force, and more efficient adsorption;

[0013] 2. The height of the tool legs is variable. By flipping the tool, the required placement height of the strong magnet can be quickly obtained, which is convenient for the combined use of tools;

[0014] 3. The tool disassembly process is simple. By loosening the fastening thread with the handle, the strong magnet can be quickly disassembled and assembled. Through demagnetization, the adsorbed and collected iron filings can be efficiently cleaned up. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 is Figure 1 the structure diagram of the variable leg 1 in

[0018] Figure 3 is Figure 1 the structure diagram of the connecting sleeve 7 in

[0019] Figure 4 is Figure 1 the structure diagram of the non-magnetic cylinder 4 in

[0020] In the above figure: variable leg 1, handle 2, magnet cylinder 3, non-magnetic cylinder 4, non-magnetic conductor 5, strong magnet 6, connecting sleeve 7, sealing ring 8, indicating hole 101, connecting hole 102, placing surface 103, threaded fastening hole 701, sealing groove 702, leg guard 401, limit bayonet 402. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0022] Embodiment 1

[0023] A strong magnet iron filing collection and salvage tool, characterized in that it includes a variable leg 1, a handle 2, a magnet cylinder 3, a non-magnetic cylinder 4, a non-magnetic conductor 5, a strong magnet 6 and a connecting sleeve 7; wherein, a group of short cylindrical strong magnets 6 are arranged in series at intervals with cylindrical non-magnetic conductors 5 in the middle, placed in the magnet cylinder 3, limited by retaining rings at both ends, the magnetic pole axis of a single strong magnet 6 coincides with the axis of the magnet cylinder 3, and the non-magnetic conductor 5 is placed in the middle of a single strong magnet 6; both ends of the connecting sleeve 7 are in plug-in fit with both ends of the magnet cylinder 3 respectively; the handle 2 is connected to the connecting sleeve 7 by a thread and fastens the magnet cylinder 3 and the connecting sleeve 7; outside the magnet cylinder 3 is a thin-walled non-magnetic cylinder 4.

[0024] Embodiment 2

[0025] On the basis of the above-mentioned Embodiment 1, the variable support leg 1 is an equilateral triangular plate with a rounded tip. In the middle is a non-through connection hole 102, and the center position of the hole is at unequal distances from the three sides. The distance sizes are marked by the identification round holes 101 arranged at the relative vertex positions of the placement surface 103. The diameters of the identification round holes 101 have three sizes, and the height of the magnet cylinder 3 when the opposite side of the identification is used as the placement surface 103 is marked.

[0026] Furthermore, the connecting sleeve 7 is a sleeve-shaped rotating body. There is a sealing groove 702 on the inner side for placing the sealing ring 8, and there are steps on the outer side. Three threaded fastening holes 701 are evenly distributed in the steps perpendicular to the radial direction of the sleeve shaft. The connecting sleeve 7 is welded to the variable support leg 1, and the directions of the threaded fastening holes 701 are the same as the sharp corner direction of the variable support leg 1.

[0027] Furthermore: The non-magnetic cylinder 4 is a thin-walled barrel-shaped body, made of non-magnetic metal material or plastic. At both ends are leg shields 401 with larger diameters. Each leg shield 401 has a limit bayonet 402, and the size and shape are matched with the handle 2.

[0028] The connecting sleeve 7 is internally provided with a sealing ring 8.

[0029] Typical Embodiment 3

[0030] As Figure 1 shown, a strong magnet chip collection and salvage tool includes a variable support leg 1, a handle 2, a magnet cylinder 3, a non-magnetic cylinder 4, a non-magnetic conductor 5, a strong magnet 6, a connecting sleeve 7 and a sealing ring 8. A group of short cylindrical strong magnets 6 are arranged in series at intervals with cylindrical non-magnetic conductors 5 in the middle, placed in the magnet cylinder 3, and limited by retaining rings at both ends. The magnetic pole axis of a single strong magnet 6 coincides with the axis of the magnet cylinder 3. The non-magnetic conductor 5 is placed in the middle of a single strong magnet 6 to block the connection of the magnetic force lines of adjacent single strong magnets, so that the magnetic force lines of a single strong magnet are closed at the head and tail, and further keep the magnetic force of the whole group of strong magnets evenly distributed, with a large contact area and more efficient adsorption. The connecting sleeve 7 is fixedly connected to the variable support leg 1 by welding, and is respectively inserted at both ends of the magnet cylinder 3. The handle 2 is connected to the connecting sleeve 7 by a thread and is equivalent to a set screw to fasten the magnet cylinder 3 and the connecting sleeve 7. The connecting sleeve 7 is internally provided with a sealing ring 8 to prevent the inside of the magnet cylinder 3 from being contaminated by the outside. Outside the magnet cylinder 3 is a thin-walled non-magnetic cylinder 4.

[0031] As Figure 2 shown, the variable support leg 1 is an equilateral triangular plate with a rounded tip. In the middle is a non-through connection hole 102, and the center position of the hole is at unequal distances from the three sides. The distance sizes are marked by the identification round holes 101 arranged at the relative vertex positions of the placement surface 103. The largest diameter of the round hole marks the largest distance of the opposite side, and vice versa. Different placement surfaces 103 can be selected during the use of the tool to obtain different placement heights of the magnet cylinder.

[0032] As Figure 3As shown, the connecting sleeve 7 is a sleeve-shaped rotating body. There is a sealing groove 702 on the inner side for placing the sealing ring 8. There are steps on the outer side, and three threaded fastening holes 701 are evenly distributed in the radial direction perpendicular to the sleeve axis. The connecting sleeve is welded to the variable support leg, and the direction of the threaded fastening holes 701 is the same as the sharp angle direction of the variable support leg 1.

[0033] As Figure 4 shown, the non-magnetic cylinder 4 is a thin-walled barrel-shaped body. The two ends are leg shields 401. The whole is made of non-magnetic metal material or plastic. Each of the two end leg shields 401 has a limit bayonet 402, and the size and shape are suitable for the handle to disassemble the magnet.

[0034] The usage process of a strong iron filings collection and salvage tool mentioned in the present invention is as follows: According to the size and shape of the connection transition position between the diversion groove and the vibrating screen, as well as the mud flow rate, select the appropriate tool placement height and the number of tools. Multiple tools are placed in groups in the mud flow to efficiently adsorb iron filings of various sizes mixed in the mud. The adsorbed iron filings accumulate on the outer wall of the non-magnetic cylinder 4. When cleaning the iron filings, loosen the thread of the handle 2, disassemble the variable support leg 1 and the magnet cylinder 3. The iron filings adsorbed on the outer wall of the non-magnetic cylinder 4 lose magnetic force and completely fall off. Reassemble the variable support leg 1, the magnet cylinder 3 and the non-magnetic cylinder 4, and tighten the thread of the handle 2 to continue the salvage operation.

Claims

1. A strong magnet chip collection and salvage tool, Characterized in that: It includes variable legs (1), a handle (2), a magnet cylinder (3), a non-magnetic cylinder (4), a non-magnetic conductor (5), a strong magnet (6) and a connecting sleeve (7); among them, a group of short cylindrical strong magnets (6) are arranged in series at intervals with cylindrical non-magnetic conductors (5) in the middle, placed in the magnet cylinder (3), and limited by retaining rings at both ends. The magnetic pole axis of a single strong magnet (6) coincides with the axis of the magnet cylinder (3), and the non-magnetic conductor (5) is placed in the middle of a single strong magnet (6); both ends of the connecting sleeve (7) are inserted and matched with both ends of the magnet cylinder (3); the handle (2) is connected to the connecting sleeve (7) by threads and fastens the magnet cylinder (3) and the connecting sleeve (7); outside the magnet cylinder (3) is a non-magnetic cylinder (4); the non-magnetic cylinder (4) is made of non-magnetic metal material or plastic; The variable leg (1) is an equilateral triangular plate with a rounded tip. There is an unperforated connecting hole (102) in the middle. The distance from the center of the hole to the three sides is unequal, and the distance size is marked by the marked round hole (101) arranged at the opposite vertex position of the placement surface (103). The diameter of the marked round hole (101) has 3 sizes, and the height of the magnet cylinder (3) when the marked opposite side is used as the placement surface (103); the non-magnetic cylinder (4) is a thin-walled barrel-shaped body, and both ends are leg shields (401) with larger diameters. Each leg shield (401) has a limit bayonet (402), and the size and shape are matched with the handle (2).

2. The strong magnet chip collection and salvage tool according to claim 1, Characterized in that: The connecting sleeve (7) is a sleeve-shaped rotating body, with a sealing groove (702) inside for placing a sealing ring (8), and there are steps on the outside. There are 3 threaded fastening holes (701) evenly distributed in the steps perpendicular to the radial direction of the sleeve axis. The connecting sleeve (7) is welded to the variable leg (1), and the direction of the threaded fastening holes (701) is the same as the sharp angle direction of the variable leg (1).

3. The strong magnet chip collection and salvage tool according to claim 2, Characterized in that: A sealing ring (8) is built into the connecting sleeve (7).

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