Drilling fluid magnetic substance removing device

Abstract

According to the drilling fluid magnetic substance removing device, in the device, a first-stage frame is movably arranged on an oil-based mud transition groove, a first-stage roller is rotatably erected on the first-stage frame through a first-stage rotating shaft, the first-stage roller is connected with a first-stage strong magnetic area, a first-stage weak magnetic area and a first-stage non-magnetic area end to end in the circumferential direction, and a second-stage frame is supported on the first-stage frame; the second-stage roller is rotatably erected on the second-stage frame through a second-stage rotating shaft, the second-stage roller is connected with a second-stage strong magnetic area, a second-stage weak magnetic area and a second-stage non-magnetic area end to end in the circumferential direction, and the driving device is arranged at the top of the second-stage frame and is in transmission connection with the second-stage rotating shaft through a second-stage chain wheel transmission assembly; the second-stage rotating shaft is connected with the first-stage rotating shaft through a first-stage chain wheel transmission assembly, the driving device drives the first-stage roller and the second-stage roller to rotate, and when the first-stage weak magnetic area rotates to the highest point, the second-stage strong magnetic area rotates to the lowest point. The device improves the iron removing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of well drilling and repairing, in particular to a device for removing magnetic substances from drilling fluid. Background Art

[0002] In the deep shale gas exploitation stage, the well depth is generally about 6000 meters to 7000 meters, and better performance oil-based mud and rotary guide tools are needed to assist the drilling project; in order to adjust the performance of oil-based mud, natural minerals such as barite, oxidized asphalt, calcium oxide, etc. need to be added, and natural minerals are more or less accompanied by magnetic substances, which not only affect the performance of drilling mud, but also affect the use of downhole drilling tools and guide test tools. It is very necessary to remove iron filings and magnetic substances in time during drilling operations, so the drilling fluid returned to the ground must be treated in time to improve the efficiency and safety of drilling operations; the magnetic substances are cleaned manually using magnet blocks, and the removal efficiency is extremely low. Less than 300 grams can be cleaned out in one hour, and a special person is required to lower it, and it is taken out after 1 hour, and then manually cleaned and lowered again. Sometimes it takes more than ten days of continuous cleaning on the well to meet the conditions for the rotary guide tool to enter the well; in order to improve the quality and efficiency of drilling, save costs, reduce the labor intensity of employees, and quickly and effectively clean the magnetic substances in the drilling fluid, a high-efficiency and good-effect drilling fluid magnetic substance removal device is urgently needed to be developed.

[0003] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0004] The utility model aims to provide a drilling fluid magnetic material removal device, which can remove barite, calcium oxide and other associated iron-containing and magnetic substances in the drilling fluid, as well as iron-containing substances produced by wear of drilling tools, so as to replace manual cleaning of iron filings, optimize the drilling fluid performance, and ensure the normal use of downhole tools such as rotary guide equipment.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model discloses a drilling fluid magnetic material removal device comprising:

[0007] The primary frame is movably arranged on the oil-based mud transition tank.

[0008] The first-level roller is rotatably mounted on the first-level frame via a first-level rotating shaft. The first-level roller has a first-level strong magnetic area, a first-level weak magnetic area and a first-level non-magnetic area connected end to end in the circumferential direction.

[0009] A secondary frame, which is supported on the primary frame,

[0010] The secondary roller is rotatably mounted on the secondary frame via a secondary rotating shaft. The secondary roller has a secondary strong magnetic area, a secondary weak magnetic area and a secondary non-magnetic area connected end to end in the circumferential direction.

[0011] The driving device is arranged on the top of the secondary frame. The driving device is connected to the secondary rotating shaft through the secondary sprocket transmission assembly. The secondary rotating shaft is connected to the primary rotating shaft through the primary sprocket transmission assembly. The driving device drives the primary roller and the secondary roller to rotate. When the primary weak magnetic area rotates to the highest point, the secondary strong magnetic area rotates to the lowest point.

[0012] In the drilling fluid magnetic material removing device, the primary rotating shaft is rotatably supported on the primary frame via a primary shaft seat, and the secondary rotating shaft is rotatably supported on the secondary frame via a secondary shaft seat.

[0013] In the drilling fluid magnetic substance removal device, the four corners of the top of the first-level frame are connected to the four corners of the bottom of the second-level frame through studs respectively.

[0014] In the drilling fluid magnetic material removal device, the primary sprocket transmission assembly includes sprockets arranged outside the primary rotating shaft and the secondary rotating shaft and chains connected between the sprockets.

[0015] In the drilling fluid magnetic material removal device, the secondary sprocket transmission assembly includes sprockets arranged on the secondary rotating shaft and the output shaft of the driving device and chains connected between the sprockets.

[0016] In the drilling fluid magnetic material removal device, the angle occupied by the first-level strong magnetic zone is 140°, the angle occupied by the first-level weak magnetic zone is 120°, the angle occupied by the first-level non-magnetic zone is 100°, the angle occupied by the second-level strong magnetic zone is 80°, the angle occupied by the second-level weak magnetic zone is 100°, and the angle occupied by the second-level non-magnetic zone is 180°.

[0017] In the drilling fluid magnetic substance removal device, the distance between the top of the first-stage roller and the bottom of the second-stage roller is 10 cm.

[0018] In the drilling fluid magnetic material removal device, a waste intercepting groove is arranged on one side of the secondary drum, the waste intercepting groove is arranged vertically and tangent to the outer wall of the secondary drum, and the top of the waste intercepting groove is connected to the outside through a waste discharge pipe.

[0019] In the drilling fluid magnetic substance removal device, electric lifters are respectively arranged on both sides of the primary frame, and the bottom of the electric lifter is connected to the external frame.

[0020] In the described drilling fluid magnetic substance removal device, the first-stage drum enters 150 mm below the liquid level of the oil-based mud in the oil-based mud transition tank.

[0021] In the above technical solution, a drilling fluid magnetic substance removal device provided by the present utility model has the following beneficial effects: The drilling fluid magnetic substance removal device can achieve the transfer of magnetic substances through a multi-stage drum with strong magnetic regions and weak magnetic regions, realizing the automation of removing magnetic substances from drilling fluid without manual operation, greatly reducing the labor intensity of employees. The structure of this drilling fluid magnetic substance removal device is simple, easy to operate, has a low maintenance cost, a service life of more than 10 years, and can be reused multiple times; at the same time, it meets the requirements of fire prevention and explosion protection, is safe and reliable, and meets the actual on-site needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the drilling fluid magnetic substance removal device of the present utility model.

[0024] Figure 2 It is a schematic side view of the drilling fluid magnetic substance removal device of the present utility model.

[0025] Figure 3 It is a schematic cross-sectional view of the first-stage drum and the second-stage drum of the drilling fluid magnetic substance removal device of the present utility model.

[0026] The reference numerals in the drawings are as follows: first-stage drum 1, first-stage frame 2, first-stage sprocket drive assembly 3, stud 4, second-stage frame 5, second-stage drum 6, second-stage sprocket drive assembly 7, drive device 8, electric lifter 9, first-stage rotating shaft 10, first-stage shaft seat 11, second-stage rotating shaft 12, second-stage shaft seat 13, outer frame 14, first-stage strong magnetic region 101, first-stage weak magnetic region 102, first-stage non-magnetic region 103, second-stage strong magnetic region 601, second-stage weak magnetic region 602, second-stage non-magnetic region 603. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0030] To enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings.

[0031] As Figures 1 - 3 shown, in one embodiment, a device for removing magnetic substances from drilling fluid of the present utility model includes

[0032] a first-level frame 2, which is movably arranged on an oil-based mud transition tank

[0033] a first-level roller 1, which is rotatably mounted on the first-level frame 2 via a first-level rotating shaft 10. The first-level roller 1 is circumferentially connected end to end with a first-level strong magnetic region 101, a first-level weak magnetic region 102, and a first-level non-magnetic region 103.

[0034] a second-level frame 5, which is supported on the first-level frame 2

[0035] a second-level roller 6, which is rotatably mounted on the second-level frame 5 via a second-level rotating shaft 12. The second-level roller 6 is circumferentially connected end to end with a second-level strong magnetic region 601, a second-level weak magnetic region 602, and a second-level non-magnetic region 603.

[0036] The driving device 8 is arranged on the top of the secondary frame 5. The driving device 8 is connected to the secondary rotating shaft 12 through the secondary sprocket transmission assembly 7. The secondary rotating shaft 12 is connected to the primary rotating shaft 10 through the primary sprocket transmission assembly 3. The driving device 8 drives the primary roller 1 and the secondary roller 6 to rotate. When the primary weak magnetic area 102 rotates to the highest point, the secondary strong magnetic area 601 rotates to the lowest point.

[0037] In a preferred embodiment of the drilling fluid magnetic material removal device, the primary rotating shaft 10 is rotatably supported on the primary frame 2 via a primary shaft seat 11, and the secondary rotating shaft 12 is rotatably supported on the secondary frame 5 via a secondary shaft seat 13.

[0038] In a preferred embodiment of the drilling fluid magnetic material removal device, the top four corners of the primary frame 2 are connected to the bottom four corners of the secondary frame 5 through studs 4 respectively.

[0039] In a preferred embodiment of the drilling fluid magnetic material removal device, the primary sprocket transmission assembly 3 includes sprockets arranged outside the primary rotating shaft 10 and the secondary rotating shaft 12 and chains connected between the sprockets.

[0040] In a preferred embodiment of the drilling fluid magnetic material removal device, the secondary sprocket transmission assembly 7 includes sprockets arranged on the secondary rotating shaft 12 and the output shaft of the driving device 8, and chains connected between the sprockets.

[0041] In a preferred embodiment of the drilling fluid magnetic material removal device, the angle occupied by the first-level strong magnetic zone 101 is 140°, the angle occupied by the first-level weak magnetic zone 102 is 120°, the angle occupied by the first-level non-magnetic zone 103 is 100°, the angle occupied by the second-level strong magnetic zone 601 is 80°, the angle occupied by the second-level weak magnetic zone 602 is 100°, and the angle occupied by the second-level non-magnetic zone 603 is 180°.

[0042] In a preferred embodiment of the drilling fluid magnetic material removal device, the distance between the top of the first-stage roller 1 and the bottom of the second-stage roller 6 is 10 cm.

[0043] In a preferred embodiment of the drilling fluid magnetic material removal device, a waste intercepting groove is provided on one side of the secondary drum 6, the waste intercepting groove is vertically arranged and tangent to the outer wall of the secondary drum 6, and the top of the waste intercepting groove is connected to the outside through a waste discharge pipe.

[0044] In a preferred embodiment of the drilling fluid magnetic material removal device, electric lifters 9 are respectively provided on both sides of the primary frame 2 , and the bottom of the electric lifters 9 is connected to the external frame 14 .

[0045] In a preferred embodiment of the described device for removing magnetic substances from drilling fluid, the first-stage drum 1 is immersed 150 mm below the liquid level of the oil-based mud in the oil-based mud transition tank.

[0046] In one embodiment, a device for removing magnetic substances from drilling fluid includes a first-stage frame 2 and a second-stage frame 5 disposed on the upper part of the first-stage frame 2. Four corners of the top of the first-stage frame 2 are respectively connected to four corners of the bottom of the second-stage frame 5 through stud bolts 4. A first-stage drum 1 is rotatably disposed at the bottom of the first-stage frame 2, and a second-stage drum 6 is rotatably disposed at the bottom of the second-stage frame 5. The first-stage drum 1 is connected to both sides of the first-stage frame 2 through a first-stage rotating shaft 10 and a first-stage shaft seat 11, and the second-stage drum 6 is connected to both sides of the second-stage frame 5 through a second-stage rotating shaft 12 and a second-stage shaft seat 13. A driving device 8 is disposed at the top of the second-stage frame 5. The driving device 8 is in transmission connection with the second-stage rotating shaft 12 through a second-stage sprocket transmission assembly 7, and the second-stage rotating shaft 12 is connected to the first-stage rotating shaft 10 through a first-stage sprocket transmission assembly 3. The first-stage sprocket transmission assembly includes sprockets disposed outside the first-stage rotating shaft and the second-stage rotating shaft and a chain connected between the sprockets. The second-stage sprocket transmission assembly includes sprockets disposed on the second-stage rotating shaft and the output shaft of the driving device and a chain connected between the sprockets. A first-stage strong magnetic region 101, a first-stage weak magnetic region 102, and a first-stage non-magnetic region 103 are circumferentially connected end to end on the first-stage drum 1. A second-stage strong magnetic region 601, a second-stage weak magnetic region 602, and a second-stage non-magnetic region 603 are circumferentially disposed on the second-stage drum 6. When the first-stage drum 1 and the second-stage drum 6 rotate, when the first-stage weak magnetic region 102 rotates to the highest point, the second-stage strong magnetic region 601 rotates to the lowest point. The angle occupied by the first-stage strong magnetic region 101 is 140°, the angle occupied by the first-stage weak magnetic region 102 is 120°, and the angle occupied by the first-stage non-magnetic region 103 is 100°. The angle occupied by the second-stage strong magnetic region 601 is 80°, the angle occupied by the second-stage weak magnetic region 602 is 100°, and the angle occupied by the second-stage non-magnetic region 603 is 180°. The distance between the top of the first-stage drum 1 and the bottom of the second-stage drum 6 is 10 cm. A waste intercepting groove 13 is disposed on one side of the second-stage drum 6. The waste intercepting groove 13 is vertically disposed and tangent to the outer wall of the second-stage drum 6. The top of the waste intercepting groove 13 is connected to the outside through a waste discharge pipe. Electric elevators 9 are also respectively disposed on both sides of the first-stage frame 2. The bottoms of the electric elevators 9 are connected to an external frame 14.

[0047] In one embodiment, the device is placed on the oil-based mud overflow tank. Adjust the electric lifter on the frame to lower the first-stage roller of the magnetic drum about 150 mm below the surface of the oil-based mud, with the criterion of ensuring that the mud at the front end of the overflow tank does not overflow. At this time, start the driving device such as a motor, and the motor drives the magnetic drum to rotate clockwise. At this time, the lower part of the magnetic drum is in the mud, and the first-stage roller adsorbs the magnetic substances in the drilling fluid on its magnetic surface. When the magnetic substances in the first-stage roller rotate clockwise to the top and come into contact with the strong magnetic area of the second-stage roller, the magnetic substances are transferred from the first-stage roller to the second-stage roller. The mud returns to the mud pit along the first-stage roller. The magnetic substances in the second-stage roller rotate 270 degrees, and as the magnetic drum rotates to the discharge area, they are mechanically discharged by the waste chute interceptor and flow into the cuttings box for wellhead waste through the bottom pipe of the waste chute. This process realizes the efficient removal of harmful magnetic substances from the oil-based mud containing magnetic substances, and the process is continuous and automatic.

[0048] Finally, it should be noted that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0049] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for removing magnetic substances from drilling fluid, characterized in that, These include, The primary frame is movably arranged on the oil-based mud transition tank. The first-level roller is rotatably mounted on the first-level frame via a first-level rotating shaft. The first-level roller has a first-level strong magnetic area, a first-level weak magnetic area and a first-level non-magnetic area connected end to end in the circumferential direction. A secondary frame, which is supported on the primary frame, The secondary roller is rotatably mounted on the secondary frame via a secondary rotating shaft. The secondary roller has a secondary strong magnetic area, a secondary weak magnetic area and a secondary non-magnetic area connected end to end in the circumferential direction. The driving device is arranged on the top of the secondary frame. The driving device is connected to the secondary rotating shaft through the secondary sprocket transmission assembly. The secondary rotating shaft is connected to the primary rotating shaft through the primary sprocket transmission assembly. The driving device drives the primary roller and the secondary roller to rotate. When the primary weak magnetic area rotates to the highest point, the secondary strong magnetic area rotates to the lowest point.

2. The magnetic substance removal device for drilling fluid according to claim 1, characterized in that, The primary rotating shaft is rotatably supported on the primary frame via a primary shaft seat, and the secondary rotating shaft is rotatably supported on the secondary frame via a secondary shaft seat.

3. The magnetic substance removing device for drilling fluid according to claim 1, wherein The four corners at the top of the primary frame are connected to the four corners at the bottom of the secondary frame through studs respectively.

4. A drilling fluid magnetic substance removal device according to claim 1, characterized in that, The primary sprocket transmission assembly comprises sprockets arranged outside the primary rotating shaft and the secondary rotating shaft and chains connected between the sprockets.

5. The magnetic substance removing device for drilling fluid according to claim 1, characterized in that, The secondary sprocket transmission assembly comprises sprockets arranged on the secondary rotating shaft and the output shaft of the driving device and chains connected between the sprockets.

6. The magnetic substance removal device for drilling fluid according to claim 1, wherein The angle occupied by the first-level strong magnetic zone is 140°, the angle occupied by the first-level weak magnetic zone is 120°, the angle occupied by the first-level non-magnetic zone is 100°, the angle occupied by the second-level strong magnetic zone is 80°, the angle occupied by the second-level weak magnetic zone is 100°, and the angle occupied by the second-level non-magnetic zone is 180°.

7. A drilling fluid magnetic substance removal device according to claim 1, characterized in that, The distance between the top of the first roller and the bottom of the second roller is 10cm.

8. A drilling fluid magnetic substance removal device according to claim 1, characterized in that, A waste intercepting groove is arranged on one side of the secondary roller. The waste intercepting groove is arranged vertically and tangent to the outer wall of the secondary roller. The top of the waste intercepting groove is connected to the outside through a waste discharge pipe.

9. A device for removing magnetic substances from drilling fluid according to claim 1, characterized in that, Electric lifters are also provided on both sides of the primary frame, and the bottom of the electric lifter is connected to the external frame.

10. The magnetic substance removal device for drilling fluid according to claim 1, characterized in that, The first-stage roller enters the oil-based mud transition tank 150 mm below the oil-based mud liquid level.

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