Sand filtering device for oil exploitation

Abstract

The utility model relates to the technical field of oil exploitation, and discloses a sand filtering device for oil exploitation, which comprises a screen drum and a protective box arranged on the outer side of the screen drum, the driving mechanism is arranged on one side of the protection box, a cleaning mechanism is arranged in the protection box, and an oil conveying mechanism is arranged on one side of the protection box; by arranging the cleaning mechanism, when petroleum is subjected to rotary filtration through the screen drum, gravel impurities stuck in the filter holes of the screen drum can be cleaned through a scrubbing brush, various gravel impurities in the petroleum are prevented from being stuck in the filter holes, the filter holes are prevented from being blocked, and the filter holes are prevented from being blocked by the scrubbing brush. According to the petroleum sand filtering device, the sand cleaning holes are formed in the bottom of the screen drum, after petroleum sand filtering is completed, the sealing cover can be detached, sand impurities left in the screen drum are cleaned, and petroleum to be subjected to sand filtering can be conveniently and evenly sprayed into the screen drum through the arrangement of the petroleum conveying mechanism, so that the petroleum is prevented from being gathered together.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, specifically to a sand filtering device for oil extraction. Background Technology

[0002] Oilfield sand filtration refers to the process of filtering sand and gravel from oil during extraction to improve its quality. The main function of sand filtration is to filter out sand and gravel impurities as oil and gas flow from the reservoir to the bottom of the well and then rise to the wellhead. In recent years, with the development of oilfield extraction technology, various new types of oilfield sand filtration devices have emerged. Among them, rotary filtration using a screen cylinder is an effective sand filtration method. Combining the principles of vortex flow and filtration, rotary filtration can effectively separate sand and gravel particles from the oil.

[0003] Because the screen cylinder has many filter holes for filtering sand, various sands and gravels in the oil may get stuck in the filter holes during the rotation of the screen cylinder, causing blockage. If the blockage is serious, it will affect the oil sand filtering process and reduce the working efficiency of oil sand filtering. After the oil is processed, sand and gravel impurities will remain in the screen cylinder and need to be cleaned. However, the existing screen cylinders are all closed, making it difficult to remove the sand and gravel impurities in the screen cylinder. This causes too much impurity to accumulate in the screen cylinder, affecting the oil sand filtering efficiency. At the same time, because the screen cylinder is long, if the oil cannot be effectively dispersed when it enters the screen cylinder for sand and gravel filtration, the oil will gather together when the screen cylinder rotates, affecting the sand filtering. Utility Model Content

[0004] The purpose of this invention is to provide a sand filtering device for oil extraction, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sand filtering device for oil extraction, comprising a screen cylinder, and further comprising:

[0006] The protective box is located outside the screen cylinder. Support legs are fixed at the four corners of the bottom of the protective box. Two symmetrical slots are opened on the top of the protective box.

[0007] A drive mechanism is provided on one side of the protective box to drive the screen cylinder to rotate. The interior of the protective box is provided with a cleaning mechanism for cleaning the screen cylinder. An oil delivery mechanism is provided on one side of the protective box.

[0008] A lid is installed on the top of the protective box to seal the box body. Each of the four corners of the top of the protective box has a locking hole. The inner wall of the locking hole is fitted with a locking pin, and the locking pin is fixed to the bottom of the lid.

[0009] An oil drain hole is provided at the bottom of the protective box, and an oil delivery trough is provided below the oil drain hole;

[0010] A sand-cleaning hole is provided at the bottom of the screen cylinder, and a cover is installed on the outside of the sand-cleaning hole by bolts.

[0011] Preferably, the driving mechanism includes a first upright plate fixed to one side of the protective box, a motor fixed to one side of the first upright plate, and a rotating shaft installed at the output end of the motor via a coupling, the rotating shaft being fixed to one side of the screen cylinder.

[0012] Preferably, the inner wall of the protective box is provided with two symmetrical limiting grooves, and the inner walls of the two limiting grooves are rotatably connected to limiting rings, which are fixed to the outside of the screen cylinder.

[0013] Preferably, the cleaning mechanism includes a crossbar disposed above the screen cylinder, and a hard brush is installed at the bottom of the crossbar, the hard brush being in contact with the screen cylinder.

[0014] Preferably, both ends of the crossbar are fixed with locking posts, the locking posts are disposed inside the empty slot, the inner wall of the locking post is provided with two moving slots, the inner wall of the two moving slots is fixed with a spring, one end of the spring is fixed with a limit pin, and the limit pin is engaged with the inner wall of the empty slot.

[0015] Preferably, the oil delivery mechanism includes a second upright plate fixed to one side of the protective box, a support frame fixed to one side of the second upright plate, an oil pump installed inside the support frame, an oil inlet pipe and an oil delivery pipe connected inside the oil pump, and a plurality of oil injection pipes connected to the bottom of the oil delivery pipe.

[0016] Preferably, the outer side of the oil pipeline is rotatably connected to two symmetrical rotating seats, both of which are fixed to the inner wall of the protective box.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention, by incorporating a cleaning mechanism, allows for the simultaneous cyclone filtration of oil within the screen cylinder, while a stiff brush cleans the sand and gravel impurities trapped inside the filter holes. This prevents various sand and gravel impurities from becoming stuck in the filter holes and causing blockages, thereby improving the efficiency of oil sand and gravel filtration. By opening a sand-cleaning hole at the bottom of the screen cylinder, the cover can be removed after oil sand filtration, allowing for the cleaning of any remaining sand and gravel impurities within the screen cylinder. The oil delivery mechanism facilitates the even spraying of the oil to be filtered into the screen cylinder, preventing oil from accumulating and improving the oil cyclone filtration effect. Attached Figure Description

[0019] Figure 1A schematic diagram of a preferred embodiment of the sand filtering device for oil extraction provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the protective box provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the sieve cylinder provided by this utility model;

[0022] Figure 4 A schematic diagram of the drive mechanism provided by this utility model;

[0023] Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Screen cylinder; 2. Protective box; 3. Support leg; 4. Empty trough; 5. Drive mechanism; 51. First vertical plate; 52. Motor; 53. Rotating shaft; 54. Limiting groove; 55. Limiting ring; 6. Cleaning mechanism; 61. Crossbar; 62. Hard brush; 63. Locking post; 64. Moving groove; 65. Spring; 66. Limiting pin; 7. Oil delivery mechanism; 71. Second vertical plate; 72. Support frame; 73. Oil pump; 74. Oil inlet pipe; 75. Oil delivery pipe; 76. Oil spray pipe; 77. Rotating seat; 8. Box cover; 9. Locking hole; 10. Locking pin; 11. Oil drain hole; 12. Oil delivery trough; 13. Sand cleaning hole; 14. Sealing cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 As shown, a sand filtering device for oil extraction includes a screen cylinder 1 and a protective box 2 disposed outside the screen cylinder 1. Support legs 3 are fixed at the four corners of the bottom of the protective box 2, and two symmetrical slots 4 are opened on the top of the protective box 2. By setting the screen cylinder 1, sand and gravel impurities can be filtered from the extracted oil. By setting the protective box 2, the screen cylinder 1 can be protected when it rotates, so that the oil inside the screen cylinder 1 can effectively fall into the protective box 2 when it splashes during rotation. The support legs 3 can support and fix the protective box 2. By setting the two symmetrical slots 4, the crossbar 61 of the cleaning mechanism 6 described below can be installed inside it.

[0027] A drive mechanism 5 is installed on one side of the protective box 2 to drive the screen cylinder 1 to rotate. The drive mechanism 5 includes a first vertical plate 51 fixed to one side of the protective box 2. A motor 52 is fixed to one side of the first vertical plate 51. A rotating shaft 53 is installed at the output end of the motor 52 through a coupling. The rotating shaft 53 is fixed to one side of the screen cylinder 1. The motor 52 can be bolted to one side of the first vertical plate 51. The motor 52 can drive the rotating shaft 53 to rotate. The rotating shaft 53 is installed to the motor 52 through a coupling for easy disassembly. The rotation of the rotating shaft 53 can drive the screen cylinder 1 to rotate. The inner wall of the protective box 2 has two symmetrical limiting grooves 54. The inner walls of the two limiting grooves 54 are rotatably connected to limiting rings 55. The limiting rings 55 are fixed to the outside of the screen cylinder 1. By setting two limiting rings 55 to rotate in the two limiting grooves 54, the rotation of the screen cylinder 1 can be limited, improving the stability of the screen cylinder 1 when rotating.

[0028] The protective box 2 is equipped with a cleaning mechanism 6 for cleaning the filter holes of the screen cylinder 1. This mechanism cleans the filter holes on the screen cylinder 1, preventing them from being clogged by sand and gravel, which would affect the oil filtration efficiency. The cleaning mechanism 6 includes a crossbar 61 positioned above the screen cylinder 1. A stiff brush 62 is installed at the bottom of the crossbar 61, contacting the screen cylinder 1. The crossbar 61 allows the stiff brush 62 to be installed, cleaning impurities from the filter holes and preventing clogging. Both ends of the crossbar 61 are fixed with locking posts 63, which are located inside the slot 4. The column 63 can be connected to the crossbar 61, making it easy to install the crossbar 61 inside the slot 4. The inner wall of the column 63 has two moving slots 64, and the inner wall of each moving slot 64 is fixed with a spring 65. One end of the spring 65 is fixed with a limit pin 66, which is engaged with the inner wall of the slot 4. The moving slots 64 facilitate the extension and retraction of the spring 65 inside them. The spring 65 can drive the limit pin 66 to move by its own elasticity. The limit pin 66 is engaged with the inner wall of the slot 4. The slot 4 has a limit hole that matches the limit pin 66, so that the crossbar 61 is engaged in the slot 4 and it is easy to disassemble the crossbar 61.

[0029] An oil conveying mechanism 7 is installed on one side of the protective box 2. This mechanism facilitates the transport of extracted oil to the screen cylinder 1 for filtration of sand and gravel impurities. The oil conveying mechanism 7 includes a second vertical plate 71 fixed to one side of the protective box 2. A support frame 72 is fixed to one side of the second vertical plate 71. An oil pump 73 is installed inside the support frame 72. The oil pump 73 has an inlet pipe 74 and an oil delivery pipe 75 connected internally. Several spray pipes 76 are connected to the bottom of the oil delivery pipe 75. The second vertical plate 71 allows the support frame 72 to be installed, and the support frame 72 supports the oil pump 73. The oil pump 73 draws extracted oil through the inlet pipe 74 to the oil delivery pipe 75. The oil is evenly sprayed into the screen cylinder 1 through several spray pipes 76 below the oil pipeline 75. It should be noted that the oil pump 73 is set as an oil sand pump. The oil sand pump is a pump specially used to handle liquids containing oil sand or other solid particles. In the process of oil extraction, it can help pump oil liquids containing a large amount of sand and gravel, reduce the risk of oil well blockage, and improve production efficiency. This is a technology that is currently in use. Two symmetrical rotating seats 77 are rotatably connected to the outside of the oil pipeline 75. Both rotating seats 77 are fixed to the inner wall of the protective box 2. By setting two symmetrical rotating seats 77, the oil pipeline 75 can be supported so that the oil pipeline 75 will not rotate when the screen cylinder 1 rotates.

[0030] The cover 8, located on the top of the protective box 2, is used to seal the box body. The cover 8 effectively seals the top of the protective box 2. Each of the four corners of the top of the protective box 2 has a locking hole 9. The inner wall of the locking hole 9 is fitted with a locking pin 10. The locking pin 10 is fixed to the bottom of the cover 8. By setting the locking pin 10 to engage with the locking hole 9, the cover 8 can be disassembled from the protective box 2, making it easy to replace the hard brush 62 under the crossbar 61.

[0031] An oil drain hole 11 is provided at the bottom of the protective box 2, and an oil delivery tank 12 is provided below the oil drain hole 11. The oil drain hole 11 facilitates the discharge of clean oil from the sieving cylinder 1 into the protective box 2, and the oil delivery tank 12 facilitates the delivery of clean oil to the next process equipment.

[0032] A sand cleaning hole 13 is provided at the bottom of the screen cylinder 1. A cover 14 is installed on the outside of the sand cleaning hole 13 by bolts. The sand cleaning hole 13 can be used to clean the sand and gravel impurities inside the screen cylinder 1 when the screen cylinder 1 is not in use. The cover 14 can be used to seal the sand cleaning hole 13.

[0033] Working principle: The operator simultaneously turns on the motor 52 and the oil pump 73. The motor 52 drives the rotating shaft 53 to rotate, which in turn drives the screen cylinder 1 to rotate. The oil pump 73 draws the extracted oil through the inlet pipe 74 to the delivery pipe 75, and then sprays the oil evenly into the screen cylinder 1 through several spray pipes 76 below the delivery pipe 75. The screen cylinder 1 uses centrifugal force to filter sand and gravel impurities in the oil. While the screen cylinder 1 rotates, the hard brush 62 at the top of the screen cylinder 1 cleans the sand and gravel clogging the filter holes to prevent clogging. After filtration is completed, the screen cylinder needs to be cleaned. When cleaning the accumulated sand and gravel in the internal filter, the cover 14 can be opened and the sand and gravel impurities in the screen cylinder 1 can be cleaned out through the sand cleaning hole 13. After long-term use, the hard brush 62 needs to be replaced. The box cover 8 can be opened and the locking pins 63 at both ends of the crossbar 61 can be taken out from the empty groove 4. When taking it out, the limiting pin 66 will squeeze the spring 65 to extend and retract in the moving groove 64, so that the locking pins 63 are separated from the empty groove 4. When reinstalling, the locking pins 63 at both ends of the crossbar 61 are inserted into the empty groove 4. The spring 65 squeezes the limiting pin 66 with elastic force and engages with the limiting hole in the empty groove 4 to fix the crossbar 61.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sand filter device for oil production, comprising a screen cylinder (1), characterized in that, Also include: The protection box (2) is arranged outside the screen cylinder (1), the four corners of the bottom of the protection box (2) are fixed with supporting legs (3), and the top of the protection box (2) is provided with two symmetrical air slots (4); The driving mechanism (5) is arranged on one side of the protection box (2) and drives the screen cylinder (1) to rotate, the inside of the protection box (2) is provided with a cleaning mechanism (6) for cleaning the screen cylinder (1), and the side of the protection box (2) is provided with an oil conveying mechanism (7); The box cover (8) is arranged on the top of the protection box (2) and is used for sealing the box body, the four corners of the top of the protection box (2) are provided with clamping holes (9), the inner wall of the clamping hole (9) is clamped with a clamping pin (10), and the clamping pin (10) is fixed to the bottom of the box cover (8); The oil discharge hole (11) is arranged on the bottom of the protection box (2), and the oil discharge hole (11) is arranged below the oil conveying groove (12); The sand cleaning hole (13) is arranged on the bottom of the screen cylinder (1), and the outer side of the sand cleaning hole (13) is provided with a cover (14) through bolts.

2. A sand filter device for oil production according to claim 1, characterized in that: The driving mechanism (5) includes a first vertical plate (51) fixed on one side of the protection box (2), one side of the first vertical plate (51) is fixed with a motor (52), the output end of the motor (52) is connected with a rotating shaft (53) through a shaft coupling, and the rotating shaft (53) is fixed on one side of the screen cylinder (1).

3. A sand filter device for oil production according to claim 1, characterized in that: The inner wall of the protection box (2) is provided with two symmetrical limiting grooves (54), the inner wall of the two limiting grooves (54) is rotatably connected with a limiting ring (55), and the limiting ring (55) is fixed to the outer side of the screen cylinder (1).

4. A sand filter device for oil production according to claim 1, characterized in that: The cleaning mechanism (6) includes a cross rod (61) arranged above the screen cylinder (1), a hard brush (62) mounted on the bottom of the cross rod (61), and the hard brush (62) is in contact with the screen cylinder (1).

5. A sand filter for use in oil production as claimed in claim 4 wherein: The two ends of the cross rod (61) are fixed with clamping columns (63), the clamping columns (63) are arranged in the inside of the air slot (4), the inner wall of the clamping column (63) is provided with two moving grooves (64), the inner wall of the two moving grooves (64) is fixed with a spring (65), one end of the spring (65) is fixed with a limiting pin (66), and the limiting pin (66) is clamped in the inner wall of the air slot (4).

6. A sand filter device for oil production according to claim 1, characterized in that: The oil conveying mechanism (7) includes a second vertical plate (71) fixed on one side of the protection box (2), a supporting frame (72) fixed on one side of the second vertical plate (71), an oil pump (73) mounted on the inner side of the supporting frame (72), and the inside of the oil pump (73) is respectively communicated with an oil inlet pipe (74) and an oil conveying pipe (75), and the bottom of the oil conveying pipe (75) is communicated with a plurality of oil injection pipes (76).

7. A sand filter for use in oil production as claimed in claim 6 wherein: The outer side of the oil conveying pipe (75) is rotatably connected with two symmetrical rotating seats (77), and the two rotating seats (77) are fixed on the inner wall of the protection box (2).

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