CN116066033B - Anti-blocking sand filtering pipe for oil well - Google Patents
Anti-blocking sand filtering pipe for oil well Download PDFInfo
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- CN116066033B CN116066033B CN202310248016.3A CN202310248016A CN116066033B CN 116066033 B CN116066033 B CN 116066033B CN 202310248016 A CN202310248016 A CN 202310248016A CN 116066033 B CN116066033 B CN 116066033B
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- sand
- oil well
- pipe body
- sliding sleeve
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- 239000004576 sand Substances 0.000 title claims abstract description 194
- 238000001914 filtration Methods 0.000 title claims abstract description 159
- 239000003129 oil well Substances 0.000 title claims abstract description 55
- 238000007790 scraping Methods 0.000 claims abstract description 92
- 239000002184 metal Substances 0.000 claims abstract description 28
- 230000001681 protective effect Effects 0.000 claims description 72
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims 2
- 239000003963 antioxidant agent Substances 0.000 claims 1
- 230000003078 antioxidant effect Effects 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 24
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 14
- 238000004140 cleaning Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 238000010301 surface-oxidation reaction Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
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- 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)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Cleaning In General (AREA)
Abstract
The invention belongs to the technical field of petroleum exploitation, in particular to an anti-blocking sand filtering pipe for an oil well, which comprises a protection pipe and a sand filtering pipe body, wherein the sand filtering pipe body is arranged in the protection pipe; the high temperature at the bottom makes the memory metal strip tighten up, drives the protection sliding sleeve motion and unties the protection to the sand screen body, and the fluid in the oil well then gets into the sand screen body along the sand screen hole and is taken out to in the back is left the oil well to protection pipe and sand screen body, memory metal strip can restore to the throne and drive the protection sliding sleeve and reset, drives the scraping ring when the protection sliding sleeve motion and scrapes the greasy dirt and the earth impurity of adhesion of sand screen body surface.
Description
Technical Field
The invention belongs to the technical field of petroleum exploitation, and particularly relates to an anti-blocking sand filtering pipe for an oil well.
Background
In the process of injecting and producing gas with large displacement, stratum rock near a shaft bears larger alternating stress, which easily causes sand production phenomenon among stratum rock, and sand prevention measures are needed to be fully considered because the gas storage on an oil field cannot be repaired by operation measures after the gas storage is built.
One patent of Chinese patent application CN115182706A discloses a sand filtering pipe, and the technical scheme is as follows: the novel water purifier comprises a protective layer, a filter screen, a resin filter layer and a central base pipe which are sequentially sleeved from outside to inside, wherein the protective layer comprises an outer layer and an inner layer which are sleeved in a mutual clearance mode, a plurality of first liquid flow holes are formed in the outer layer, a plurality of second liquid flow holes are formed in the inner layer, and the first liquid flow holes and the second liquid flow holes are arranged in a staggered mode. The invention can be suitable for loose sandstone reservoirs with serious sand production.
With respect to the above and related art, the inventors believe that there are often the following drawbacks: the oil reservoir development is continuous deep, the sand production problem of oil well seriously influences the oil field production to traditional sand screen pipe is when penetrating into the oil well, and sand screen pipe and oil well wall contact friction easily cause the damage, and in the oil well sand very easily gets into in the sand screen hole when sand screen pipe motion and blocks up the sand screen hole, influences the efficiency that fluid passed through.
Therefore, the invention provides an oil well anti-blocking sand filtering pipe.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to an oil well anti-blocking sand filtering pipe, which comprises the following components:
the sand filtering device comprises a protective tube, wherein a sand filtering tube body is arranged in the protective tube;
the base is positioned at one end of the sand filtering pipe body far away from the protection pipe;
the sand filtering holes are formed in the surface of the sand filtering pipe body;
the movable groove is arranged in the protective tube and is formed;
the memory metal strip is fixedly connected with the inner top wall of the movable groove;
the protective sliding sleeve is fixedly connected with one end of the memory metal strip, which is far away from the inner top wall of the movable groove;
the scraping ring is fixedly connected with the inner surface of the protective sliding sleeve; when the protective pipe and the sand filtering pipe body are put into the oil well, the memory metal strip in the movable groove is in a low-temperature state and cannot deform, one end of the protective sliding sleeve, which is far away from the protective pipe, is inserted into the base, so that the effect of protecting the sand filtering pipe body is achieved, the sand filtering pipe body is prevented from being scraped by the inner wall of the oil well, when a large amount of sand is contained in the oil well, sand easily enters the sand filtering hole to block the sand filtering hole when the sand filtering pipe body moves, the situation is avoided, when the sand filtering pipe body reaches a designated position, the memory metal strip is tightened due to high temperature of the ground, the protective sliding sleeve is driven to move to unlock the protection of the sand filtering pipe body, oil in the oil well enters the sand filtering pipe body along the sand filtering hole to be extracted, and after the protective pipe and the sand filtering pipe body leave the oil well, the memory metal strip is restored and is driven to reset, and the scraping ring is driven to scrape greasy dirt and adhered soil impurities on the surface of the sand filtering pipe body when the protective sliding sleeve moves.
Preferably, a group of fixed arc plates are fixedly arranged on the inner wall of the sand filtering pipe body, positioning rods are fixedly arranged on the surfaces of the fixed arc plates, the positioning rods are positioned in the sand filtering holes, a first spring is fixedly arranged on the surface of the fixed arc plates, a scraping plate is fixedly arranged at the other end of the first spring, and the scraping plate is in sliding connection with the surface of the positioning rods; when the sand filtering hole is positioned in the oil liquid, the pressure of the oil liquid enables the scraping plate to move and extrude the first spring, after the scraping plate moves into the sand filtering pipe body, the oil liquid enters the sand filtering pipe body along the sand filtering hole, when the sand filtering pipe body leaves the oil liquid, the spring drives the scraping plate to reset, fine sand in the sand filtering hole is ejected out by the scraping plate reset, and therefore the effect that the sand in the sand filtering hole influences the oil filtering of the sand filtering hole is avoided.
Preferably, the elastic force of the first spring enables the scraping plate to be flush with the outer surface of the sand filtering pipe body after moving; after the scraper blade resets, when the protective sliding sleeve moves down and drives the scraping ring to move, impurities attached to the surface of the scraper blade can be cleaned together, and meanwhile, the scraper blade can not protrude out of the surface of the sand filtering pipe body, so that interference to the movement of the protective sliding sleeve is prevented.
Preferably, the scraping ring has elasticity, and a driving mechanism is arranged at the bottom of the protective sliding sleeve and used for controlling the deformation of the scraping ring; when the memory metal strip is heated to drive the protective sliding sleeve to move upwards, the scraping ring is controlled to deform through the driving mechanism, so that the scraping ring is not propped against the surface of the sand filtering pipe body, and impurities on the surface of the sand filtering pipe body are prevented from being brought into the position between the protective pipe and the scraping ring by the scraping ring, and the impurities are difficult to take out.
Preferably, the driving mechanism comprises an inner cavity formed in the protective sliding sleeve, a group of connecting rods are arranged in the inner wall of the inner cavity, a top plate is fixedly arranged at one end of each connecting rod located in the inner cavity, a corrugated pipe is fixedly arranged on the surface of each top plate, the other end of each corrugated pipe abuts against the inner wall of the inner cavity, and one end, away from the top plate, of each connecting rod is fixedly connected with the scraping ring; when the protection pipe and the sand filtering pipe body are positioned in the oil well, the corrugated pipe is heated to expand and the top plate is matched with each other to drive the connecting rod to move, the connecting rod drives the scraping ring to change, so that the scraping ring is not abutted against the sand filtering pipe body any more, when the protection pipe and the sand filtering pipe move out of the oil well and the memory metal strip is restored in the process of restoration, the corrugated pipe is cooled down and contracted, the elastic force of the scraping ring drives the scraping ring to restore and be abutted against the surface of the sand filtering pipe body, and therefore the surface of the sand filtering pipe body is scraped normally, and the cleaning process is realized.
Preferably, an elastic block is arranged in the base, the elastic block is provided with a hollow structure, and the surface of the elastic block is provided with a spray hole communicated with the hollow structure; when the protective sliding sleeve moves downwards into the base, the protective sliding sleeve is propped against the elastic block, gas in the elastic block is sprayed out along the spray holes to clean the surface of the scraping ring, and impurities are prevented from adhering to the surface of the scraping ring.
Preferably, the elastic block is made of rubber, and a solid structure is arranged below the hollow structure of the elastic block; after the elastic block deformation cleaning scraping ring, the protective sliding sleeve continues to extrude the elastic block downwards, and when the elastic block deformation wraps the two sides of the lower end of the protective sliding sleeve after extruding to the solid structure of the elastic block, so that the sand filtering pipe body is sealed, the surface oxidation resistant layer is corroded due to long-term contact of the sand filtering pipe body with oil liquid, and the sand filtering pipe body is prevented from being corroded and oxidized by the atmosphere due to contact with air after leaving the oil well.
Preferably, the surface of the protective tube is provided with a coating, and the coating is a wear-resistant coating; the wear-resistant coating can promote the resistance of the protective pipe when the protective pipe contacts with the inner wall of the oil well during the movement in the oil well, and avoid being scratched.
Preferably, a second spring is fixedly arranged on the inner surface of the base, a supporting plate is fixedly arranged at the other end of the second spring, and the elastic block is placed on the upper surface of the supporting plate; when the elastic block is extruded, the supporting plate is driven to move and the second spring is extruded, impurities are blown off and fall into the base after the elastic block is injected, and when the protective sliding sleeve is far away from the base, the second spring drives the supporting plate and the elastic block to reset and eject the impurities in the base, so that the impurities are cleaned from the base.
Preferably, a knocking block is arranged in the inner wall of the spray hole, an elastic rope is fixedly arranged on the surface of the knocking block, the other end of the elastic rope is fixedly connected with the inner wall of the elastic block, and the knocking block is arranged in a spherical shape; when the elastic block is extruded, the air flow drives the knocking block to spray out and knock the scraping ring, the spherical knocking block can enable the air flow to further improve the effect of cleaning the scraping ring, accordingly the cleaning force of the scraping ring is improved, and the elastic rope can prevent the knocking block from falling and drive the knocking block to reset.
The beneficial effects of the invention are as follows:
1. when the protective pipe and the sand filtering pipe body are put into the oil well, the memory metal strips in the movable grooves are not deformed in a low-temperature state, one end of the protective sliding sleeve, which is far away from the protective pipe, is inserted into the base, so that the effect of protecting the sand filtering pipe body is achieved, the sand filtering pipe body is prevented from being scraped by the inner wall of the oil well, when a large amount of sand is contained in the oil well, sand is extremely easy to enter the sand filtering holes to block the sand filtering holes when the sand filtering pipe moves, further, the situation is avoided, when the sand filtering pipe body reaches a specified position, the memory metal strips are tightened due to high temperature of the ground, the protective sliding sleeve is driven to move to unlock the sand filtering pipe body, oil in the oil well enters the sand filtering pipe body along the sand filtering holes, and after the protective sliding sleeve is separated from the oil well, the memory metal strips are restored and drive the protective sliding sleeve to reset, and the scraping ring is driven to scrape greasy dirt and adhered impurities on the surface of the sand filtering pipe body when the protective sliding sleeve moves.
2. According to the anti-blocking sand filtering pipe for the oil well, when the sand filtering hole is positioned in oil liquid, the pressure of the oil liquid enables the scraping plate to move and extrude the first spring, after the scraping plate moves into the sand filtering pipe body, the oil liquid enters the sand filtering pipe body along the sand filtering hole, when the sand filtering pipe body leaves the oil liquid, the scraping plate is driven by the spring to reset, fine sand in the sand filtering hole is ejected out by reset of the scraping plate, and therefore the effect that the sand in the sand filtering hole influences the oil filtering effect of the sand filtering hole is avoided.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the entire present invention;
FIG. 2 is a schematic structural view of a protective sliding sleeve according to the present invention;
FIG. 3 is a schematic view of the structure of the sand filtering pipe body in the present invention;
FIG. 4 is a schematic view of the structure of FIG. 3A according to the present invention;
FIG. 5 is a cross-sectional view of a sand screen of the present invention;
FIG. 6 is a schematic view of the structure of a bellows according to the present invention
FIG. 7 is a schematic view of the structure of the elastic block in the present invention;
fig. 8 is a schematic diagram of the structure of a knocking block in the second embodiment.
In the figure: 1. a protective tube; 2. a sand filtering pipe body; 3. a base; 4. sand filtering holes; 5. a protective sliding sleeve; 6. a memory metal strip; 7. a movable groove; 8. a scraping ring; 9. fixing the arc plate; 10. a positioning rod; 11. a scraper; 12. a first spring; 13. an inner cavity; 14. a connecting rod; 15. a top plate; 16. a bellows; 17. an elastic block; 18. a spray hole; 19. a second spring; 20. a supporting plate; 21. an elastic rope; 22. the block is knocked.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Example 1
As shown in fig. 1 to 7, an anti-blocking sand screen for an oil well according to an embodiment of the present invention includes:
the sand filtering device comprises a protection pipe 1, wherein a sand filtering pipe body 2 is arranged in the protection pipe 1;
the base 3 is positioned at one end of the sand filtering pipe body 2 far away from the protection pipe 1;
the sand filtering holes 4 are formed in the surface of the sand filtering pipe body 2;
the movable groove 7 is formed in the protective tube 1;
the memory metal strip 6 is fixedly connected with the inner top wall of the movable groove 7;
the protective sliding sleeve 5 is fixedly connected with one end of the memory metal strip 6, which is far away from the inner top wall of the movable groove;
the scraping ring 8, the scraping ring 8 links with the internal surface fixed of protection sliding sleeve 5 when protection pipe 1 and sand filtering body 2 put into the oil well in, memory metal strip 6 in the movable groove 7 is in the low temperature state and can not take place deformation, protection sliding sleeve 5 keeps away from the one end of protection pipe 1 and inserts in base 3, thereby reach the effect of protection sand filtering body 2, prevent that sand filtering body 2 from being scraped by the oil well inner wall, and when containing a large amount of sand in the oil well, sand very easily gets into in sand filtering hole 4 and blocks up sand filtering hole 4 when sand filtering body 2 moves, and then avoid the emergence of above-mentioned condition, when sand filtering body 2 reaches the assigned position, the high temperature of ground makes memory metal strip 6 deformation tighten up, drive protection sliding sleeve 5 motion untie the protection to sand filtering body 2, the fluid in the oil well then gets into sand filtering body 2 along sand filtering hole 4 and is taken out, and after protection pipe 1 and sand filtering body 2 leave in the oil well, memory metal strip 6 can and drive protection sliding sleeve 5 and reset, the emergence of the soil of scraping body 2 is scraped to the dirty surface with the oil of ring 8 when protection sliding sleeve 5 moves.
The sand filtering device comprises a sand filtering pipe body 2, a sand filtering hole 4, a sand filtering pipe body 11, a sand filtering pipe body 2, a sand filtering plate and a positioning rod 10, wherein the inner wall of the sand filtering pipe body 2 is fixedly provided with a group of fixed arc plates 9, the surfaces of the fixed arc plates 9 are fixedly provided with positioning rods 10, the positioning rods 10 are all positioned in the sand filtering hole 4, the surface of the fixed arc plates 9 is fixedly provided with a first spring 12, the other end of the first spring 12 is fixedly provided with a scraping plate 11, and the scraping plate 11 is in sliding connection with the surface of the positioning rod 10; when the sand filtering hole 4 is positioned in the oil liquid, the pressure of the oil liquid enables the scraping plate 11 to move and extrude the first spring 12, after the scraping plate 11 moves into the sand filtering pipe body 2, the oil liquid enters the sand filtering pipe body 2 along the sand filtering hole 4, when the sand filtering pipe body 2 leaves the oil liquid, the first spring 12 drives the scraping plate 11 to reset, and fine sand in the sand filtering hole 4 is ejected out by the reset of the scraping plate 11, so that the effect that the sand in the sand filtering hole 4 influences the oil filtering effect of the sand filtering hole 4 cannot exist.
Wherein the elastic force of the first spring 12 enables the scraping plate 11 to be flush with the outer surface of the sand filtering pipe body 2 after moving; after the scraper blade 11 resets, when the protective sliding sleeve 5 descends to drive the scraping ring 8 to move, impurities attached to the surface of the scraper blade 11 can be cleaned together, and meanwhile, the scraper blade 11 cannot protrude out of the surface of the sand filtering pipe body 2, so that interference to the movement of the protective sliding sleeve 5 is prevented.
The scraping ring 8 has elasticity, and a driving mechanism is arranged at the bottom of the protective sliding sleeve 5 and used for controlling the deformation of the scraping ring 8; when the memory metal strip 6 is heated to drive the protective sliding sleeve 5 to ascend, the scraping ring 8 is controlled to deform through the driving mechanism, so that the scraping ring 8 does not abut against the surface of the sand filtering pipe body 2 any more, and impurities on the surface of the sand filtering pipe body 2 are prevented from being brought into the position between the protective pipe 1 and the scraping ring 8 by the scraping ring 8, and the impurities are difficult to take out.
The driving mechanism comprises an inner cavity 13 arranged in the protective sliding sleeve 5, a group of connecting rods 14 are arranged in the inner wall of the inner cavity 13, a top plate 15 is fixedly arranged at one end of the connecting rods 14 positioned in the inner cavity 13, a corrugated pipe 16 is fixedly arranged on the surface of the top plate 15, the other end of the corrugated pipe 16 abuts against the inner wall of the inner cavity 13, and one end, far away from the top plate 15, of the connecting rods 14 is fixedly connected with the scraping ring 8; when the protection pipe 1 and the sand filtering pipe body 2 are positioned in an oil well, the corrugated pipe 16 is heated to expand and mutually matched with the top plate 15 to drive the connecting rod 14 to move, the connecting rod 14 drives the scraping ring 8 to deform, so that the scraping ring is not propped against the sand filtering pipe body 2 any more, when the protection pipe 1 and the sand filtering pipe body 2 move out of the oil well and then the memory metal strip 6 is restored, the corrugated pipe 16 is cooled and contracted, the elasticity of the scraping ring 8 drives the scraping ring to restore and prop against the surface of the sand filtering pipe body 2, and therefore the surface of the sand filtering pipe body 2 is scraped normally, and the cleaning process is realized.
The base 3 is internally provided with an elastic block 17, the elastic block 17 is provided with a hollow structure, and the surface of the elastic block 17 is provided with a spray hole 18 communicated with the hollow structure; when the protective sliding sleeve 5 moves downwards into the base 3, the protective sliding sleeve is propped against the elastic block 17, and gas in the elastic block 17 is sprayed out along the spray holes 18 to clean the surface of the scraping ring 8, so that impurities are prevented from adhering to the surface of the scraping ring 8.
Wherein, the elastic block 17 is made of rubber, and a solid structure is arranged below the hollow structure of the elastic block 17; after the elastic block 17 deforms to clean the scraping ring 8, the protective sliding sleeve 5 continuously descends to extrude the elastic block 17, and after the elastic block 17 is extruded to a solid structure of the elastic block 17, the elastic block 17 deforms to wrap the two sides of the lower end of the protective sliding sleeve 5, so that the sand filtering pipe body 2 is sealed, the surface oxidation resistant layer is corroded due to long-term contact of the sand filtering pipe body 2 with oil liquid, and the sand filtering pipe body 2 is prevented from being corroded and oxidized by the atmosphere due to contact with air after leaving an oil well.
Wherein, the surface of the protective tube 1 is provided with a coating, and the coating is a wear-resistant coating; the wear-resistant coating can promote the resistance of the protective tube 1 when contacting with the inner wall of the oil well during the movement in the oil well, and avoid being scratched.
The inner surface of the base 3 is fixedly provided with a second spring 19, the other end of the second spring 19 is fixedly provided with a supporting plate 20, and the elastic block 17 is placed on the upper surface of the supporting plate 20; when the elastic block 17 is extruded, the supporting plate 20 is driven to move and the second spring 19 is extruded, impurities are blown off and fall into the base 3 after the elastic block 17 is sprayed, and when the protective sliding sleeve 5 is far away from the base 3, the second spring 19 drives the supporting plate 20 and the elastic block 17 to reset and push out the impurities in the base 3, so that the impurities are cleaned from the base 3.
Example two
As shown in fig. 8, in comparative example one, another embodiment of the present invention is: a knocking block 22 is arranged in the inner wall of the spray hole 18, an elastic rope 21 is fixedly arranged on the surface of the knocking block 22, the other end of the elastic rope 21 is fixedly connected with the inner wall of the elastic block 17, and the knocking block 22 is arranged in a spherical shape; when the elastic block 17 is extruded, the air flow drives the knocking block 22 to spray out and knock the scraping ring 8, the spherical knocking block 22 can enable the air flow to further improve the effect of cleaning the scraping ring 8, accordingly the cleaning force of the scraping ring 8 is improved, and the elastic rope 21 can prevent the knocking block 22 from falling and drive the knocking block 22 to reset.
Working principle: when the protective pipe 1 and the sand filtering pipe body 2 are put into an oil well, the memory metal strips 6 in the movable groove 7 are not deformed in a low-temperature state, one end of the protective sliding sleeve 5, which is far away from the protective pipe 1, is inserted into the base 3, so that the effect of protecting the sand filtering pipe body 2 is achieved, when the sand filtering pipe body 2 is scraped by the inner wall of the oil well and a large amount of sand is contained in the oil well, sand is extremely easy to enter the sand filtering holes 4 to block the sand filtering holes 4 when the sand filtering pipe body 2 moves, the occurrence of the situation is avoided, when the sand filtering pipe body 2 reaches a specified position, the memory metal strips 6 are deformed and tightened by high temperature at the ground, the protective sliding sleeve 5 is driven to move to unlock the sand filtering pipe body 2, oil in the oil well enters the sand filtering pipe body 2 along the sand filtering holes 4 and is extracted, and when the protective pipe body 1 and the sand filtering pipe body 2 leave the oil well, the memory metal strips 6 are restored and drive the protective sliding sleeve 5 to reset, and the scraping ring 8 is driven to scrape oil dirt and adhered to the surface of the sand filtering pipe body 2 when the sand is moved; when the sand filtering hole 4 is positioned in the oil liquid, the pressure of the oil liquid enables the scraping plate 11 to move and extrude the first spring 12, when the scraping plate 11 moves into the sand filtering pipe body 2, the oil liquid enters the sand filtering pipe body 2 along the sand filtering hole 4, when the sand filtering pipe body 2 leaves the oil liquid, the first spring 12 drives the scraping plate 11 to reset, and the scraping plate 11 resets to eject fine sand in the sand filtering hole 4, so that the sand in the sand filtering hole 4 cannot influence the oil filtering effect of the sand filtering hole 4; after the scraping plate 11 is reset, when the protective sliding sleeve 5 moves downwards to drive the scraping ring 8 to move, impurities attached to the surface of the scraping plate 11 can be cleaned together, and meanwhile, the scraping plate 11 cannot protrude out of the surface of the sand filtering pipe body 2, so that interference to the movement of the protective sliding sleeve 5 is prevented; when the memory metal strip 6 is heated to drive the protective sliding sleeve 5 to ascend, the scraping ring 8 is controlled to deform through the driving mechanism, so that the scraping ring 8 does not abut against the surface of the sand filtering pipe body 2 any more, and impurities on the surface of the sand filtering pipe body 2 are prevented from being brought into a position between the protective pipe 1 and the scraping ring 8 by the scraping ring 8, and the impurities are difficult to take out; when the protection pipe 1 and the sand filtering pipe body 2 are positioned in an oil well, the corrugated pipe 16 is heated to expand and is matched with the top plate 15 to drive the connecting rod 14 to move, the connecting rod 14 drives the scraping ring 8 to deform so as not to prop against the sand filtering pipe body 2, when the protection pipe 1 and the sand filtering pipe body 2 are moved out of the oil well and then the memory metal strip 6 is restored, the corrugated pipe 16 is cooled and contracted, the elasticity of the scraping ring 8 drives the scraping ring to restore and prop against the surface of the sand filtering pipe body 2, and therefore the surface of the sand filtering pipe body 2 is scraped normally, and the cleaning process is realized; when the protective sliding sleeve 5 moves downwards into the base 3, the protective sliding sleeve is propped against the elastic block 17, and gas in the elastic block 17 is sprayed out along the spray holes 18 to clean the surface of the scraping ring 8, so that impurities are prevented from being attached to the surface of the scraping ring 8; after the elastic block 17 deforms to clean the scraping ring 8, the protective sliding sleeve 5 continuously descends to squeeze the elastic block 17, and after the elastic block 17 is extruded to a solid structure of the elastic block 17, the elastic block 17 deforms to wrap the two sides of the lower end of the protective sliding sleeve 5, so that the sand filtering pipe body 2 is sealed, the surface oxidation resistant layer is corroded due to long-term contact of the sand filtering pipe body 2 with oil liquid, and the sand filtering pipe body 2 is prevented from being corroded and oxidized by the atmosphere due to contact with air after leaving an oil well; the wear-resistant coating can promote the resistance of the protective tube 1 when contacting with the inner wall of the oil well during the movement in the oil well, so as to avoid being scratched; when the elastic block 17 is extruded, the supporting plate 20 is driven to move and the second spring 19 is extruded, the elastic block 17 blows off impurities and falls into the base 3 after air injection, and when the protective sliding sleeve 5 is far away from the base 3, the second spring 19 drives the supporting plate 20 and the elastic block 17 to reset and push out the impurities in the base 3, so that the impurities are cleaned from the base 3; when the elastic block 17 is extruded, the air flow drives the knocking block 22 to spray out and knock the scraping ring 8, the spherical knocking block 22 can enable the air flow to further improve the effect of cleaning the scraping ring 8, accordingly the cleaning force of the scraping ring 8 is improved, and the elastic rope 21 can prevent the knocking block 22 from falling and drive the knocking block 22 to reset.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An oil well anti-blocking sand filtering pipe is characterized in that: comprising the following steps:
the sand filtering device comprises a protection pipe (1), wherein a sand filtering pipe body (2) is arranged in the protection pipe (1);
the base (3) is positioned at one end of the sand filtering pipe body (2) far away from the protection pipe (1);
the sand filtering holes (4) are formed in the surface of the sand filtering pipe body (2);
the movable groove (7) is formed in the protective tube (1);
the memory metal strip (6), the said memory metal strip (6) is fixedly connected with inner roof of the movable trough (7);
the protective sliding sleeve (5) is fixedly connected with one end of the memory metal strip (6) far away from the inner top wall of the movable groove;
the scraping ring (8), the scraping ring (8) is fixedly connected with the inner surface of the protective sliding sleeve (5), a group of fixed arc plates (9) are fixedly arranged on the inner wall of the sand filtering pipe body (2), positioning rods (10) are fixedly arranged on the surfaces of the fixed arc plates (9), the positioning rods (10) are positioned in the sand filtering holes (4), a first spring (12) is fixedly arranged on the surface of the fixed arc plates (9), a scraping plate (11) is fixedly arranged at the other end of the first spring (12), the scraping plate (11) is slidably connected with the surface of the positioning rods (10), the elastic force of the first spring (12) enables the scraping plate (11) to be flush with the outer surface of the sand filtering pipe body (2) after moving, the scraping ring (8) is elastic, a driving mechanism is arranged at the bottom of the protective sliding sleeve (5) and used for controlling deformation of the scraping ring (8), the driving mechanism comprises an inner cavity (13) formed in the protective sliding sleeve (5), a group of connecting rods (14) are arranged in the inner wall of the inner cavity (13), one end of the inner cavity (14) abuts against one end of the connecting rod (16), and one end of the connecting rod (16) is fixedly arranged in the corrugated pipe (15), one end of the connecting rod (14) far away from the top plate (15) is fixedly connected with the scraping ring (8).
2. An oil well anti-clogging sand screen as set forth in claim 1 wherein: the novel plastic base is characterized in that an elastic block (17) is arranged in the base (3), the elastic block (17) is of a hollow structure, and a spray hole (18) communicated with the hollow structure is formed in the surface of the elastic block (17).
3. An oil well anti-clogging sand screen as claimed in claim 2, wherein: the elastic block (17) is made of rubber, and a solid structure is arranged below the hollow structure of the elastic block (17).
4. A sand screen for preventing oil well from clogging as set forth in claim 3, wherein: the surface of the protective tube (1) is provided with a coating, and the coating is an antioxidant coating.
5. An oil well anti-clogging sand screen as set forth in claim 4 wherein: the inner surface of the base (3) is fixedly provided with a second spring (19), the other end of the second spring (19) is fixedly provided with a supporting plate (20), and the elastic block (17) is placed on the upper surface of the supporting plate (20).
6. An oil well anti-clogging sand screen as set forth in claim 5 wherein: the novel plastic injection device is characterized in that a knocking block (22) is arranged in the inner wall of the injection hole (18), an elastic rope (21) is fixedly arranged on the surface of the knocking block (22), the other end of the elastic rope (21) is fixedly connected with the inner wall of the elastic block (17), and the knocking block (22) is in a spherical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310248016.3A CN116066033B (en) | 2023-03-15 | 2023-03-15 | Anti-blocking sand filtering pipe for oil well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310248016.3A CN116066033B (en) | 2023-03-15 | 2023-03-15 | Anti-blocking sand filtering pipe for oil well |
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| CN116066033A CN116066033A (en) | 2023-05-05 |
| CN116066033B true CN116066033B (en) | 2023-06-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382836Y (en) * | 1999-04-07 | 2000-06-14 | 辽河石油勘探局华油实业公司兴科公司 | Controllable porosity sand control screen for oil field downhole |
| US7926565B2 (en) * | 2008-10-13 | 2011-04-19 | Baker Hughes Incorporated | Shape memory polyurethane foam for downhole sand control filtration devices |
| CN206309355U (en) * | 2016-11-28 | 2017-07-07 | 中国石油天然气股份有限公司 | Sand control screen |
| CN207470166U (en) * | 2017-10-12 | 2018-06-08 | 中国石油化工股份有限公司 | Underground fracture sand blasting unit |
| US10961807B2 (en) * | 2018-02-12 | 2021-03-30 | Saudi Arabian Oil Company | Loss circulation drilling packer |
| CN212130464U (en) * | 2019-12-28 | 2020-12-11 | 胜利油田中胜油气新技术开发有限责任公司 | Primary pipe column subsection sand prevention tool |
| CN111894532B (en) * | 2020-07-23 | 2023-02-21 | 中国石油大学(华东) | Sand control screen pipe flow control system, method and device and petroleum underground drilling and production tool |
| CN113650990A (en) * | 2021-08-27 | 2021-11-16 | 詹光辉 | Telescopic fire-extinguishing garbage can |
| CN113863889A (en) * | 2021-09-27 | 2021-12-31 | 李香珍 | A general pilot production instrument for oil reservoir shutoff |
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