CN115467643A - Self-cleaning composite sand filtering pipe - Google Patents
Self-cleaning composite sand filtering pipe Download PDFInfo
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- CN115467643A CN115467643A CN202211341809.1A CN202211341809A CN115467643A CN 115467643 A CN115467643 A CN 115467643A CN 202211341809 A CN202211341809 A CN 202211341809A CN 115467643 A CN115467643 A CN 115467643A
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- pipe
- fixed
- wall
- screening
- cleaning
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- 239000004576 sand Substances 0.000 title claims abstract description 49
- 238000004140 cleaning Methods 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000001914 filtration Methods 0.000 title abstract description 25
- 238000012216 screening Methods 0.000 claims abstract description 66
- 239000011148 porous material Substances 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 10
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 10
- 241001330002 Bambuseae Species 0.000 claims description 10
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 10
- 239000011425 bamboo Substances 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007873 sieving Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 23
- 230000002265 prevention Effects 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 11
- 239000012535 impurity Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a self-cleaning composite sand filtering pipe, which belongs to the technical field of sand filtering pipes and comprises a central pipe, wherein a first screening pipe is fixedly sleeved on the outer wall of the central pipe, a second screening pipe is fixedly sleeved on the outer wall of the first screening pipe, a cavity is arranged between the first screening pipe and the second screening pipe, a plurality of uniformly distributed sieve pores are arranged on the outer walls of the central pipe, the first screening pipe and the second screening pipe, and the sizes of the pores on the central pipe, the first screening pipe and the second screening pipe are gradually reduced. According to the invention, the first screening pipe and the second screening pipe are arranged, and the sizes of the sieve pores on the central pipe, the first screening pipe and the second screening pipe are gradually reduced, so that bridging blockage cannot be formed when fluid passes through the sieve pores, the fluid is output along with the fluid, the permeability of the sand filtering pipe is ensured, the sand prevention stable yield period is prolonged, the anti-blocking mechanism is arranged, the inner part of the sieve pores or the surface of the second screening pipe can be polluted and blocked due to long-term use of the second screening pipe, and prevention and cleaning are carried out through the anti-blocking mechanism.
Description
Technical Field
The invention belongs to the technical field of sand filtering pipes, and particularly relates to a self-cleaning composite sand filtering pipe.
Background
The sand filtering pipe has high integral strength, good filtering performance, wide application range, simple structure of the well completion pipe column, simple and convenient process and important position in the well completion of the independent sieve pipe. The conventional sand filtering pipes such as metal felt sand filtering pipes, screen type sand filtering pipes, precise composite sand filtering pipes and the like have the characteristics of strong sand prevention capability, simple and convenient construction and the like.
The conventional sand filtering pipe is developed along with the heavy oil reservoir and the high-argillaceous siltstone reservoir, and the conventional sand filtering pipe has the defects of low sand production capacity after sand prevention, short high-yield and stable-production period due to the single sand blocking precision and poor self-cleaning performance after blockage.
The Chinese invention patent with the publication number of CN112127853A discloses an oil well anti-blocking sand screen, which comprises a speed reducing module, an anti-blocking module and an auxiliary module. This patent is through setting up the anti-clogging module, when oil stops flowing, and the fly leaf will get back to initial position under the elasticity of spring to the impurity clearance that leaves when will defeated oil falls, and then prevents that impurity from blockking up the trompil that prevents stifled board middle part, through setting up supplementary module, has accelerated the speed of flow of oil in this device, thereby compensaties the influence that this device caused the velocity of flow of oil.
However, the above patents still have some disadvantages:
1. when the device is used, oil is directly conveyed into the sand filtering pipe, and the oil is not filtered firstly, so that too many impurities are left in the sand filtering pipe, and the internal blockage is caused;
2. the device is through setting up the anti-clogging module, when oil stops flowing, the fly leaf will get back to initial position under the elasticity of spring, thereby impurity clearance that leaves when with the oil transportation falls, and then prevent that impurity from blockking up the trompil of preventing stifled board middle part, but only open and shut the fly leaf through the oil pressure, strike off twice to the fly leaf inner wall at most, such clearance effect is very little, when remaining fluid adheres at the fly leaf inner wall, can increase the resistance of fly leaf inner wall this moment, thereby the pressure that can lead to the oil pressure makes the fly leaf unable to open and shut, thereby lead to inside jam.
Disclosure of Invention
The invention aims to provide a self-cleaning composite sand screen, which solves the problems of low liquid yield after sand prevention and short high-yield stable production period caused by single sand blocking precision and poor self-cleaning performance after blockage of the sand screen.
In order to achieve the purpose, the invention adopts the following technical scheme:
the self-cleaning composite sand filtering pipe comprises a central pipe, wherein a first screening pipe is fixedly sleeved on the outer wall of the central pipe, a second screening pipe is fixedly sleeved on the outer wall of the first screening pipe, a cavity is arranged between the first screening pipe and the second screening pipe, a plurality of uniformly distributed screen holes are formed in the outer walls of the central pipe, the first screening pipe and the second screening pipe, the screen hole diameter of the central pipe is larger than that of the first screening pipe, the screen hole diameter of the first screening pipe is larger than that of the second screening pipe, an anti-blocking mechanism for preventing the screen holes of the second screening pipe from being blocked is arranged on the outer wall of the central pipe, the anti-blocking mechanism comprises a cleaning component for cleaning the second screening pipe and a turbulence component for performing oil liquid cleaning, the cleaning component is fixedly arranged on the outer wall of the central pipe, the turbulence component is arranged on the central pipe and is meshed with the cleaning component, and a flow guide component and an auxiliary component for performing auxiliary cleaning on the flow guide component are arranged in the central pipe.
Preferably, the clearance subassembly includes bottom plate, electric putter, butt plate, solid fixed ring and strikes off the piece, the bottom plate is fixed to be located on the center tube, electric putter quantity is equipped with a plurality ofly, and is a plurality of electric putter is even fixed to be located on the bottom plate, and the butt plate is fixed to be located the electric putter output to butt plate bottom and solid fixed ring fixed connection, strike off the piece and be equipped with a plurality ofly and evenly be fixed in solid fixed ring inner wall and with second screening pipe outer wall butt.
Preferably, strike off the piece and include a fixed section of thick bamboo, telescopic link, C template and round brush, a fixed section of thick bamboo one end sets up with solid fixed ring is fixed, inside the telescopic link passed through reset spring and slides and locates a fixed section of thick bamboo, the C template sets up with the telescopic link is fixed, the round brush rotates and locates between the C template inner wall and butt in second screening pipe outer wall.
Preferably, vortex subassembly quantity is corresponding with electric putter quantity, the vortex subassembly includes pinion rack, gear, C type pole and vortex stirring piece, the pinion rack is fixed to be located butt joint board one side, and pinion rack bottom mounting is equipped with the lantern ring, and lantern ring and electric putter outer wall sliding fit, the fixed center tube outer wall that locates of C type pole, and gear revolve locates on the C type pole to the gear is connected with the pinion rack meshing, vortex stirring piece quantity is equipped with two and fixes and locates gear outer wall both sides.
Preferably, the diversion assembly comprises a diversion funnel, a diversion scraper, a movable cylinder and a connecting pipe, the diversion funnel is fixedly arranged inside the central pipe, the diversion scraper is fixedly arranged at the bottom of the diversion funnel, the movable cylinder penetrates through the inside of the diversion scraper and extends to the bottom of the diversion scraper, the connecting pipe is fixedly arranged at the bottom of the movable cylinder, and a driving structure for driving the movable cylinder to automatically clean and move is arranged inside the central pipe.
Preferably, the diversion scraper blade and the movable cylinder are of a double-layer structure design, the movable cylinder is located in a double-layer cavity of the diversion scraper blade, the bottom end of the diversion scraper blade is provided with a sharp corner and abuts against the inner wall of the movable cylinder, and the top end of the inner wall of the movable cylinder is provided with a hollow groove.
Preferably, the driving structure comprises a screw, a motor and a fixing plate, the fixing plate is fixedly arranged on the outer wall of the connecting pipe, the screw penetrates through the inside of the fixing plate and is in threaded connection with the fixing plate, the motor is fixedly arranged in the central pipe, the output end of the motor is fixedly connected with the screw, and a slot in sliding connection with the fixing plate is formed in the inside of the central pipe.
Preferably, the connecting tube diameter is smaller than the base tube diameter.
The invention has the advantages that:
1. according to the sand control and stable production period, the first screening pipe and the second screening pipe are arranged, and the sizes of the sieve pores on the central pipe, the first screening pipe and the second screening pipe are gradually reduced, so that bridging blockage cannot be formed when fluid passes through the sand control and stable production period can be ensured along with the fluid output, the permeability of the sand filtering pipe is ensured, the sand control and stable production period is prolonged, the anti-blocking mechanism is arranged, the inner part of the sieve pores or the surface of the second screening pipe can be polluted and blocked when the second screening pipe is used for a long time, and prevention and cleaning are performed through the anti-blocking mechanism.
2. According to the invention, the turbulent flow component is arranged, so that the surrounding fluid can flow in an accelerated manner, impurities in the fluid can be stirred and scattered, the flowing speed of the fluid is enhanced, and the filtering effect is improved.
3. The inner wall of the flow guide assembly is cleaned through the driving mechanism, so that the condition that the inner fluid is adhered to the inner wall of the flow guide assembly to block the inner part of the central pipe is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention and to enable other features, objects and advantages of the invention to be more fully apparent. The drawings and their description illustrate the invention by way of example and are not intended to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the self-cleaning composite sand screen of the present invention;
FIG. 2 is a schematic view showing a connection structure of a core pipe and a first sizing pipe according to the present invention;
FIG. 3 is an enlarged schematic view of the anti-jamming mechanism of the present invention;
FIG. 4 is an enlarged view of A in FIG. 3 according to the present invention;
FIG. 5 is an overall sectional structural view of the self-cleaning composite sand screen of the present invention;
FIG. 6 is an enlarged view of the flow guide assembly and the driving structure of the present invention;
FIG. 7 is an enlarged view of B in FIG. 6 according to the present invention;
fig. 8 is an enlarged structural diagram of C in fig. 6 according to the present invention.
Description of reference numerals:
1. a central tube; 2. a first sizing tube; 3. a second sizing tube; 4. a cavity; 5. screening holes; 6. an anti-clogging mechanism; 61. cleaning the assembly; 611. a base plate; 612. an electric push rod; 613. a butt joint plate; 614. a fixing ring; 615. a scraping member; 616. a fixed cylinder; 617. a telescopic rod; 618. c-shaped plates; 619. rolling and brushing; 62. a spoiler assembly; 621. a toothed plate; 622. a gear; 623. a C-shaped rod; 624. a turbulent flow stirring block; 7. a flow guide assembly; 71. a diversion funnel; 72. a diversion scraper blade; 73. a movable barrel; 74. a connecting pipe; 75. sharp corners; 76. an empty groove; 8. a drive structure; 81. a screw; 82. a motor; 83. a fixing plate; 84. and (4) slotting.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1-8, the self-cleaning composite sand filtering pipe according to the present invention comprises a central pipe 1, a first screening pipe 2 fixedly sleeved on the outer wall of the central pipe 1, a second screening pipe 3 fixedly sleeved on the outer wall of the first screening pipe 2, and a cavity 4 is arranged between the first screening pipe 2 and the second screening pipe 3, a plurality of uniformly distributed sieve pores 5 are arranged on the outer walls of the central pipe 1, the first screening pipe 2 and the second screening pipe 3, the pore diameter of the sieve pore 5 of the central pipe 1 is larger than that of the sieve pore 5 of the first screening pipe 2, the pore diameter of the sieve pore 5 of the first screening pipe 2 is larger than that of the sieve pore 5 of the second screening pipe 3, firstly, when the stratum fine sand and the aged polymer pass through the sand filtering pipe, most of the stratum fine sand and the aged polymer are blocked by the second screening pipe 3 with a smaller mesh on the outer screen, after the part of the passing stratum fine sand and the aged polymer enter the inner part of the cavity 4, when the fluid passes through the first screening pipe 2 with larger meshes of the screen again, bridging blockage can not be formed and the fluid is output, thereby ensuring the permeability of the sand filtering pipe and prolonging the sand control stable production period, the outer wall of the central pipe 1 is provided with an anti-blocking mechanism 6 for preventing the blockage of the sieve pores 5 of the second screening pipe 3, the long-term use of the second screening pipe 3 can cause the pollution and the blockage inside the sieve pores 5 or the surface of the second screening pipe 3, prevent through preventing blockking up mechanism 6 and prevent and clear up, prevent blockking up mechanism 6 including being used for carrying out the clearance subassembly 61 of clearing up and being used for carrying out the vortex subassembly 62 of vortex to fluid to second screening pipe 3, clearance subassembly 61 is fixed to be located the 1 outer wall of center tube, vortex subassembly 62 locate on the center tube 1 and with clearance subassembly 61 intermeshing, the inside auxiliary assembly who is equipped with water conservancy diversion subassembly 7 and is used for carrying out supplementary clearance to water conservancy diversion subassembly 7 of center tube 1.
Firstly, when cleaning of the second sieving pipe 3 is required, the cleaning assembly 61 is started to work, the cleaning assembly 61 comprises a bottom plate 611, an electric push rod 612, an abutting plate 613, a fixing ring 614 and a scraping element 615, the bottom plate 611 is fixedly arranged on the central pipe 1, a plurality of electric push rods 612 are arranged, the electric push rods 612 are uniformly and fixedly arranged on the bottom plate 611, the abutting plate 613 is fixedly arranged at the output end of the electric push rod 612, the bottom of the abutting plate 613 is fixedly connected with the fixing ring 614, the scraping element 615 is provided with a plurality of fixing rings which are uniformly fixed on the inner wall of the fixing ring 614 and abut against the outer wall of the second sieving pipe 3, at the moment, the electric push rod 612 is powered on, the electric push rod 612 is started to enable the output end of the electric push rod 612 to drive the abutting plate 613 to ascend, so that the fixing rings which are synchronously and stably arranged on the abutting plates 613 drive the ascending of the fixing ring 614, and the inside of the sieve holes 5 and the surface of the second sieving pipe 3 are cleaned through the scraping element 615.
Preferably, the scraping part 615 comprises a fixed cylinder 616, an expansion link 617, a C-shaped plate 618 and a rolling brush 619, one end of the fixed cylinder 616 is fixedly arranged with the fixed ring 614, the expansion link 617 is arranged inside the fixed cylinder 616 in a sliding manner through a return spring, the C-shaped plate 618 is fixedly arranged with the expansion link 617, the rolling brush 619 is rotatably arranged between the inner walls of the C-shaped plate 618 and abutted against the outer wall of the second screening pipe 3, in an initial state, the rolling brush 619 is abutted against the surface of the second screening pipe 3, so that when the fixed ring 614 ascends, the rolling brush 619 can move along the surface of the second screening pipe 3, and stains on the surface are taken away, when passing through the screen holes 5, the expansion link drives a brush on the surface of the rolling brush 619 to scrape and clean the surface of the screen holes 5 under the abutting pressure of the spring, the service life of the whole device is further prolonged, and the permeability of the sand filtering pipe is ensured.
Secondly, when clearing up second screening pipe 3, through setting up vortex subassembly 62, fluid flow and stirring the scattering of the inside impurity of fluid are accelerated around, strengthen the flow velocity of fluid and improved the filter effect, vortex subassembly 62 quantity and electric putter 612 quantity correspond, vortex subassembly 62 includes pinion 621, gear 622, C type pole 623 and vortex stirring piece 624, pinion 621 is fixed to be located butt joint board 613 one side, and pinion 621 bottom mounting is equipped with the lantern ring, and the lantern ring and electric putter 612 outer wall sliding fit, C type pole 623 is fixed to be located the center tube 1 outer wall, and gear 622 rotates and locates on C type pole 623, and gear 622 and pinion 621 meshing connection, vortex stirring piece 624 quantity is equipped with two and fixes and locates gear 622 outer wall both sides, when electric putter 612 rises, drive pinion 621 to rise, improve the firm effect when pinion 621 rises through addding the lantern ring, the rising of pinion 622 drives gear 622, thereby drive a plurality of vortex pieces 624 to rotate, fluid stirs and fluid inside impurity breaks up, and the reciprocating motion of the vortex push rod drives a plurality of stirring piece 612 to change the filter effect regularly, thereby the fluid flow can be strengthened the filtration effect.
After fluid enters the inside of the central tube 1, the flow is guided in the flow direction by the flow guide assembly 7, the flow guide assembly 7 includes a flow guide funnel 71, a flow guide scraper 72, a movable cylinder 73 and a connecting tube 74, the flow guide funnel 71 is fixedly arranged inside the central tube 1, the flow guide scraper 72 is fixedly arranged at the bottom of the flow guide funnel 71, the movable cylinder 73 penetrates through the inside of the flow guide scraper 72 and extends to the bottom of the flow guide scraper 72, the connecting tube 74 is fixedly arranged at the bottom of the movable cylinder 73, a driving structure 8 for driving the movable cylinder 73 to move in a self-cleaning manner is arranged inside the central tube 1, preferably, the flow guide scraper 72 and the movable cylinder 73 are both of a double-layer structure design, the movable cylinder 73 is located in a double-layer cavity of the flow guide scraper 72, the bottom end of the flow guide scraper 72 is provided with a 75 and abutted against the inner wall of the movable cylinder 73, the top end of the inner wall of the movable cylinder 73 is provided with a hollow groove 76, and after the fluid enters the inside of the central tube 1, the flow guide funnel 71, the flow guide scraper 72, the movable cylinder 73 and the connecting tube 74 sequentially flow guide.
Secondly, the driving structure 8 includes a screw 81, a motor 82 and a fixing plate 83, the fixing plate 83 is fixedly disposed on the outer wall of the connecting tube 74, the screw 81 penetrates through the inside of the fixing plate 83 and is in threaded connection with the fixing plate 83, the motor 82 is fixedly disposed in the center tube 1, and the output end of the motor is fixedly connected with the screw 81, the inside of the center tube 1 is provided with a slot 84 in sliding connection with the fixing plate 83, preferably, the diameter of the connecting tube 74 is smaller than the diameter of the bottom of the center tube 1, the diversion assembly 7 can be cleaned periodically, the motor 82 is started to drive the screw 81 to rotate, so that the fixing plate 83 slides up and down along the slot 84, as can be seen from the above, the fixing plate 83 is fixedly disposed on the outer wall of the connecting tube 74, and the connecting tube 74 is fixedly disposed at the bottom of the movable tube 73, so that the connecting tube 74 drives the movable tube 73 to slide inside the double-layer cavity of the diversion scraper 72 by the connecting tube 74, while sliding, when scraping downwards, the fluid flows down along the connecting tube 74, and when scraping upwards, the fluid flows from the inside of the double-layer cavity of the movable tube 73 to the connecting tube 74 through the empty slot 76, and finally flows out, thereby achieving the cleaning effect.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modifications, equivalents, improvements and the like are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a self-cleaning compound sand screen, includes center tube (1), its characterized in that: a first screening pipe (2) is fixedly sleeved on the outer wall of the central pipe (1), a second screening pipe (3) is fixedly sleeved on the outer wall of the first screening pipe (2), and a cavity (4) is arranged between the first screening pipe (2) and the second screening pipe (3), the outer walls of the central pipe (1), the first screening pipe (2) and the second screening pipe (3) are all provided with a plurality of evenly distributed screen holes (5), the aperture of the sieve pore (5) of the central pipe (1) is larger than that of the sieve pore (5) of the first sieving pipe (2), the aperture of the sieve pore (5) of the first sieving pipe (2) is larger than that of the sieve pore (5) of the second sieving pipe (3), the outer wall of the central pipe (1) is provided with an anti-blocking mechanism (6) for preventing the sieve pores (5) of the second sieving pipe (3) from being blocked, the anti-blocking mechanism (6) comprises a cleaning component (61) for cleaning the second screening pipe (3) and a flow disturbing component (62) for disturbing flow of oil, the cleaning component (61) is fixedly arranged on the outer wall of the central tube (1), the turbulent flow component (62) is arranged on the central pipe (1) and is meshed with the cleaning component (61), the central pipe (1) is internally provided with a flow guide assembly (7) and an auxiliary assembly for performing auxiliary cleaning on the flow guide assembly (7).
2. The self-cleaning composite sand screen of claim 1, wherein: the cleaning assembly (61) comprises a bottom plate (611), an electric push rod (612), an abutting plate (613), a fixing ring (614) and a scraping piece (615), the bottom plate (611) is fixedly arranged on the central pipe (1), the electric push rod (612) is provided with a plurality of fixed rings (614) and a plurality of electric push rods (612) are uniformly and fixedly arranged on the bottom plate (611), the abutting plate (613) is fixedly arranged at the output end of the electric push rod (612), the bottom of the abutting plate (613) is fixedly connected with the fixing ring (614), and the scraping piece (615) is provided with a plurality of fixed rings (614) and is uniformly fixed on the inner wall of the fixing ring (614) and abutted against the outer wall of the second screening pipe (3).
3. The self-cleaning composite sand screen of claim 2, wherein: scraping piece (615) including a fixed section of thick bamboo (616), telescopic link (617), C template (618) and round brush (619), a fixed section of thick bamboo (616) one end and fixed ring (614) fixed setting, inside fixed section of thick bamboo (616) was located in telescopic link (617) through reset spring slip, C template (618) and telescopic link (617) fixed setting, round brush (619) rotate locate between C template (618) inner wall and butt in second screening pipe (3) outer wall.
4. The self-cleaning composite sand screen of claim 2, wherein: the utility model discloses a vortex subassembly, including vortex subassembly (62) quantity and electric putter (612) quantity, vortex subassembly (62) are corresponding, including pinion rack (621), gear (622), C type pole (623) and vortex stirring piece (624), pinion rack (621) is fixed to be located butt joint board (613) one side, and pinion rack (621) bottom mounting is equipped with the lantern ring, and lantern ring and electric putter (612) outer wall sliding fit, center tube (1) outer wall is located to C type pole (623) fixed, and rotates in C type pole (623) gear (622) and is located to gear (622) and pinion rack (621) meshing connection, stirring piece (624) quantity is equipped with two and fixes and locates gear (622) outer wall both sides.
5. The self-cleaning composite sand screen of claim 1, wherein: flow guide assembly (7) include water conservancy diversion funnel (71), water conservancy diversion scraper blade (72), activity section of thick bamboo (73) and connecting pipe (74), inside center tube (1) was located to water conservancy diversion funnel (71) fixed, water conservancy diversion scraper blade (72) are fixed to be located water conservancy diversion funnel (71) bottom, activity section of thick bamboo (73) run through inside water conservancy diversion scraper blade (72) and extend to water conservancy diversion scraper blade (72) bottom, connecting pipe (74) are fixed to be located activity section of thick bamboo (73) bottom, inside being equipped with of center tube (1) is used for driving drive structure (8) that activity section of thick bamboo (73) automatically cleaning removed.
6. The self-cleaning composite sand screen of claim 5, wherein: the flow guide scraper (72) and the movable cylinder (73) are both designed in a double-layer structure, the movable cylinder (73) is located in a double-layer cavity of the flow guide scraper (72), the bottom end of the flow guide scraper (72) is provided with a sharp corner (75) and abuts against the inner wall of the movable cylinder (73), and the top end of the inner wall of the movable cylinder (73) is provided with a hollow groove (76).
7. The self-cleaning composite sand screen of claim 5, wherein: drive structure (8) include screw rod (81), motor (82) and fixed plate (83), fixed plate (83) are fixed to be located connecting pipe (74) outer wall, and screw rod (81) run through fixed plate (83) inside and with fixed plate (83) threaded connection, motor (82) are fixed to be located in center tube (1) and output and screw rod (81) fixed connection, center tube (1) inside be equipped with fixed plate (83) sliding connection's fluting (84).
8. The self-cleaning composite sand screen of claim 5, wherein: the diameter of the connecting pipe (74) is smaller than that of the bottom of the central pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211341809.1A CN115467643B (en) | 2022-10-31 | 2022-10-31 | Self-cleaning composite sand filtering pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211341809.1A CN115467643B (en) | 2022-10-31 | 2022-10-31 | Self-cleaning composite sand filtering pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115467643A true CN115467643A (en) | 2022-12-13 |
| CN115467643B CN115467643B (en) | 2023-01-13 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115961918A (en) * | 2023-03-16 | 2023-04-14 | 山东巨辉石油科技有限公司 | Self-cleaning combined sand filtering pipe |
| CN116066032A (en) * | 2023-03-07 | 2023-05-05 | 东营百华石油技术开发有限公司 | Circular seam type sand filtering pipe |
| CN116357272A (en) * | 2023-05-26 | 2023-06-30 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Anti-blocking geothermal well screen pipe for geothermal exploitation |
| CN116607918A (en) * | 2023-07-18 | 2023-08-18 | 山东华冠能源技术有限公司 | Long-well section large-span bypass sand filtering pipe |
| CN116658130A (en) * | 2023-07-31 | 2023-08-29 | 招远金河石油设备技术开发有限公司 | Anti-blocking self-cleaning sand filtering pipe for oil well |
| CN117846551A (en) * | 2024-03-06 | 2024-04-09 | 漾泉蓝焰煤层气有限责任公司 | Sand-proof screen pipe |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116066032A (en) * | 2023-03-07 | 2023-05-05 | 东营百华石油技术开发有限公司 | Circular seam type sand filtering pipe |
| CN115961918A (en) * | 2023-03-16 | 2023-04-14 | 山东巨辉石油科技有限公司 | Self-cleaning combined sand filtering pipe |
| CN116357272A (en) * | 2023-05-26 | 2023-06-30 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Anti-blocking geothermal well screen pipe for geothermal exploitation |
| CN116357272B (en) * | 2023-05-26 | 2023-08-15 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Anti-blocking geothermal well screen pipe for geothermal exploitation |
| CN116607918A (en) * | 2023-07-18 | 2023-08-18 | 山东华冠能源技术有限公司 | Long-well section large-span bypass sand filtering pipe |
| CN116607918B (en) * | 2023-07-18 | 2023-09-15 | 山东华冠能源技术有限公司 | Long-well section large-span bypass sand filtering pipe |
| CN116658130A (en) * | 2023-07-31 | 2023-08-29 | 招远金河石油设备技术开发有限公司 | Anti-blocking self-cleaning sand filtering pipe for oil well |
| CN116658130B (en) * | 2023-07-31 | 2023-10-20 | 招远金河石油设备技术开发有限公司 | Anti-blocking self-cleaning sand filtering pipe for oil well |
| CN117846551A (en) * | 2024-03-06 | 2024-04-09 | 漾泉蓝焰煤层气有限责任公司 | Sand-proof screen pipe |
| CN117846551B (en) * | 2024-03-06 | 2024-06-04 | 漾泉蓝焰煤层气有限责任公司 | Sand-proof screen pipe |
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Denomination of invention: Self cleaning composite sand filter tube Effective date of registration: 20231106 Granted publication date: 20230113 Pledgee: Yantai financing guarantee Group Co.,Ltd. Pledgor: Shandong Huaguan Energy Technology Co.,Ltd. Registration number: Y2023980064188 |