CN210473229U - Three-stage filtering device - Google Patents
Three-stage filtering device Download PDFInfo
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- CN210473229U CN210473229U CN201920838832.9U CN201920838832U CN210473229U CN 210473229 U CN210473229 U CN 210473229U CN 201920838832 U CN201920838832 U CN 201920838832U CN 210473229 U CN210473229 U CN 210473229U
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- filter screen
- port plate
- screen cylinder
- outer tube
- supporting member
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- 238000001914 filtration Methods 0.000 title claims abstract description 41
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002349 favourable effect Effects 0.000 abstract description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 13
- 235000017491 Bambusa tulda Nutrition 0.000 description 13
- 241001330002 Bambuseae Species 0.000 description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 13
- 239000011425 bamboo Substances 0.000 description 13
- 238000003466 welding Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a tertiary filter device, including outer tube (3), first valve plate (2), first order filter screen cylinder (4), first support piece (5), second valve plate (7), second level filter screen cylinder (8), second support piece (9), third valve plate (11), third level filter screen cylinder (13) and third support piece (14) have set gradually in outer tube (3), the filtration pore diameter of crossing of first order filter screen cylinder (4) is greater than the filtration pore diameter of second level filter screen cylinder (8), the filtration pore diameter of crossing of second level filter screen cylinder (8) is greater than the filtration pore diameter of crossing of third level filter screen cylinder (13). This tertiary filter equipment is according to mechanical impurity's size, divide into the filter screen the tertiary, filters step by step, and this tertiary filter equipment has played certain step-down effect simultaneously, is favorable to preventing that impurity from entering into next level through the filter screen and is favorable to improving the filter effect.
Description
Technical Field
The utility model relates to an oil recovery equipment field, specific is a tertiary filter equipment.
Background
Along with the continuous continuation of oil field development, the continuous increase of income well fluid, the solid impurity of various different shapes is constantly poured into the pit shaft, brings the pollution of different degree or blocks up for the oil reservoir and is unfavorable for oil field's development, and the filter equipment that uses at present is single can not carry out hierarchical processing to the granule for filter equipment takes place to block up or can not play the filtering action.
SUMMERY OF THE UTILITY MODEL
In order to improve the filter effect, the utility model provides a tertiary filter equipment, this tertiary filter equipment divide into the tertiary with the filter screen according to mechanical impurity's size, filters step by step, and this tertiary filter equipment has played certain step-down effect simultaneously, is favorable to preventing that impurity from entering into next level through the filter screen other, is favorable to improving the filter effect, and this tertiary filter equipment still has the backwash function simultaneously, is favorable to improving the result of use of filter.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a tertiary filter equipment, including the outer tube, the one end of outer tube is the entry end, the other end of outer tube is the exit end, along the direction of the entry end of outer tube to the exit end of outer tube, first valve plate has set gradually in the outer tube, first level filter screen section of thick bamboo, first support piece, the second valve plate, second level filter screen section of thick bamboo, second support piece, the third valve plate, third level filter screen section of thick bamboo and third support piece, the filtration pore diameter of first level filter screen section of thick bamboo is greater than the filtration pore diameter of second level filter screen section of thick bamboo, the filtration pore diameter of second level filter screen section of thick bamboo is greater than the filtration pore diameter of third level filter screen section of thick bamboo.
The outer tube is upright state, and the entry end of outer tube is up, and the exit end of outer tube is down, is equipped with the top connection outward at the entry end of outer tube, and the exit end of outer tube is equipped with the lower clutch outward.
The outer peripheral surface of the first valve plate is of a stepped structure, the outer peripheral surface of the first valve plate comprises a large outer diameter section and a small outer diameter section which are sequentially connected, the small outer diameter section of the first valve plate is sleeved in the outer pipe, and the small outer diameter section of the first valve plate is in threaded connection with the outer pipe.
The middle part of the first valve plate is provided with a round blind hole, the upper end of the first-stage filter screen cylinder is inserted into the round blind hole of the first valve plate in a matching manner, the first valve plate is provided with a plurality of liquid inlet through holes, and the liquid inlet through holes of the first valve plate are positioned between the round blind hole of the first valve plate and the outer peripheral surface of the first valve plate.
The first supporting piece is of a circular ring-shaped structure, the outer diameter of the first supporting piece is equal to the inner diameter of the outer pipe, a step through hole is formed in the middle of the first supporting piece, the step through hole of the first supporting piece contains a large inner diameter section and a small inner diameter section which are sequentially connected, the lower end of the first-stage filter screen cylinder is connected in the large inner diameter section of the first supporting piece in a matched mode, and an annular cavity is formed between the first-stage filter screen cylinder and the outer pipe.
The outer diameter of the second valve plate is equal to the inner diameter of the outer pipe, a round blind hole is formed in the middle of the second valve plate, the upper end of the second-stage filter screen cylinder is inserted into the round blind hole of the second valve plate in a matching mode, a plurality of liquid inlet through holes are formed in the second valve plate, and the liquid inlet through holes of the second valve plate are located between the round blind hole of the second valve plate and the outer peripheral face of the second valve plate.
The second support piece is the ring shape structure, and the external diameter of second support piece equals the internal diameter of outer tube, and second support piece's middle part is equipped with the ladder through-hole, and second support piece's ladder through-hole contains the big internal diameter section and the little internal diameter section that connect gradually, and the grafting that the lower extreme of second level filter screen section of thick bamboo matches forms annular cavity between second level filter screen section of thick bamboo and the outer tube in the big internal diameter section of second support piece.
The outer diameter of the third valve plate is equal to the inner diameter of the outer pipe, a round blind hole is formed in the middle of the third valve plate, the upper end of the third-stage filter screen cylinder is inserted into the round blind hole of the third valve plate in a matched mode, a plurality of liquid inlet through holes are formed in the third valve plate, and the liquid inlet through holes of the third valve plate are located between the round blind hole of the third valve plate and the outer peripheral face of the third valve plate.
The third support piece is the ring shape structure, and the external diameter of third support piece equals the internal diameter of outer tube, and the middle part of third support piece is equipped with the ladder through-hole, and the ladder through-hole of third support piece contains the big internal diameter section and the little internal diameter section that connect gradually, and the grafting that the lower extreme of third level filter screen section of thick bamboo matches forms annular cavity between third level filter screen section of thick bamboo and the outer tube in the big internal diameter section of third support piece.
A first spacer ring is arranged between the first supporting piece and the second port plate, a second spacer ring is arranged between the second supporting piece and the third port plate, a first sealing ring is arranged between the first supporting piece and the outer tube, a second sealing ring is arranged between the second supporting piece and the outer tube, and a third sealing ring is arranged between the third supporting piece and the outer tube.
The utility model has the advantages that: this tertiary filter equipment is according to mechanical impurity's size, divide into the filter screen the tertiary, filters step by step, and this tertiary filter equipment has played certain step-down effect simultaneously, is favorable to preventing that impurity from entering into next level through the filter screen and is other, is favorable to improving the filter effect, and this tertiary filter equipment still has the backwash function simultaneously, is favorable to improving the result of use of filter.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is an overall schematic view of the tertiary filtration device of the present invention.
Fig. 2 is a schematic view of the upper part of the three-stage filtration device of the present invention.
Fig. 3 is a schematic view of the lower part of the three-stage filtration device of the present invention.
1. An upper joint; 2. a first port plate; 3. an outer tube; 4. a first stage filter screen cylinder; 5. a first support member; 6. a first spacer ring; 7. a second port plate; 8. a second stage filter screen cylinder; 9. a second support member; 10. a second spacer ring; 11. a third port plate; 13. a third stage filter screen cylinder; 14. a third support member; 15. and a lower joint.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The utility model provides a tertiary filter equipment, including outer tube 3, the one end of outer tube 3 is the entry end, the other end of outer tube 3 is the exit end, along the direction of the entry end of outer tube 3 to the exit end of outer tube 3, first valve plate 2 has set gradually in the outer tube 3, first level filter screen cylinder 4, first support piece 5, second valve plate 7, second level filter screen cylinder 8, second support piece 9, third valve plate 11, third level filter screen cylinder 13 and third support piece 14, the filtration pore diameter of first level filter screen cylinder 4 is greater than the filtration pore diameter of second level filter screen cylinder 8, the filtration pore diameter of second level filter screen cylinder 8 is greater than the filtration pore diameter of third level filter screen cylinder 13, as shown in fig. 1-3.
In this embodiment, the outer tube 3 is in a vertical state, the inlet end of the outer tube 3 faces upward, the outlet end of the outer tube 3 faces downward, the upper joint 1 is arranged outside the inlet end of the outer tube 3, and the lower joint 15 is arranged outside the outlet end of the outer tube 3. The first stage filter screen cylinder 4, the second stage filter screen cylinder 8 and the third stage filter screen cylinder 13 are all of a cylindrical structure formed by filter screen rings, the diameter of a filter hole of the first stage filter screen cylinder 4 is 3mm-2mm, the diameter of a filter hole of the second stage filter screen cylinder 8 is 1.5mm-1mm, and the diameter of a filter hole of the third stage filter screen cylinder 13 is 0.1mm-0.5 mm.
In this embodiment, the outer peripheral surface of the first port plate 2 is of a stepped structure, the outer peripheral surface of the first port plate 2 includes a large outer diameter section and a small outer diameter section which are sequentially connected from top to bottom, the diameter of the large outer diameter section is greater than that of the small outer diameter section, the small outer diameter section of the first port plate 2 is sleeved in the outer tube 3, the large outer diameter section of the first port plate 2 is located outside the outer tube 3, and the small outer diameter section of the first port plate 2 is in threaded connection with the outer tube 3, as shown in fig. 1.
In this embodiment, the middle part of the first port plate 2 is provided with a circular blind hole, the upper end of the first-stage filter screen cylinder 4 is inserted into the circular blind hole of the first port plate 2, that is, the outer diameter of the first-stage filter screen cylinder 4 is equal to the diameter of the circular blind hole of the first port plate 2. Be equipped with a plurality of feed liquor through-holes on first valve plate 2, a plurality of feed liquor through-holes are along the circumference evenly distributed of first valve plate 2, and the feed liquor through-hole of first valve plate 2 is located between the circular blind hole of first valve plate 2 and the outer peripheral face of first valve plate 2.
In this embodiment, first support piece 5 is the ring annular structure, and the external diameter of first support piece 5 equals the internal diameter of outer tube 3, and the middle part of first support piece 5 is equipped with the ladder through-hole, and the ladder through-hole of first support piece 5 contains big internal diameter section and the little internal diameter section that connects gradually from top to bottom, and the grafting that the lower extreme of first order filter screen section of thick bamboo 4 matches is in the big internal diameter section of first support piece 5, and the external diameter of first order filter screen section of thick bamboo 4 equals the diameter of the big internal diameter section of first support piece 5 promptly. An annular cavity is formed between the first-stage filter screen cylinder 4 and the outer pipe 3.
In this embodiment, the outer diameter of the second port plate 7 is equal to the inner diameter of the outer tube 3, a circular blind hole is formed in the middle of the second port plate 7, and the upper end of the second-stage filter screen cylinder 8 is inserted into the circular blind hole of the second port plate 7 in a matching manner, that is, the outer diameter of the second-stage filter screen cylinder 8 is equal to the diameter of the circular blind hole of the second port plate 7. A plurality of liquid inlet through holes are formed in the second valve plate 7 and are evenly distributed along the circumferential direction of the second valve plate 7, and the liquid inlet through holes of the second valve plate 7 are located between the circular blind holes of the second valve plate 7 and the outer peripheral face of the second valve plate 7.
In this embodiment, the second supporting member 9 is a circular ring structure, the outer diameter of the second supporting member 9 is equal to the inner diameter of the outer tube 3, the middle portion of the second supporting member 9 is provided with a step through hole, the step through hole of the second supporting member 9 contains a large inner diameter section and a small inner diameter section which are sequentially connected from top to bottom, the lower end of the second-stage filter screen cylinder 8 is inserted into the large inner diameter section of the second supporting member 9, that is, the outer diameter of the second-stage filter screen cylinder 8 is equal to the diameter of the large inner diameter section of the second supporting member 9. An annular cavity is formed between the second-stage filter screen cylinder 8 and the outer pipe 3.
In this embodiment, the outer diameter of the third port plate 11 is equal to the inner diameter of the outer tube 3, a circular blind hole is formed in the middle of the third port plate 11, and the upper end of the third filtering screen cylinder 13 is inserted into the circular blind hole of the third port plate 11 in a matching manner, that is, the outer diameter of the third filtering screen cylinder 13 is equal to the diameter of the circular blind hole of the third port plate 11. And a plurality of liquid inlet through holes are formed in the third valve plate 11 and are uniformly distributed along the circumferential direction of the third valve plate 11, and the liquid inlet through holes of the third valve plate 11 are formed between the circular blind holes of the third valve plate 11 and the outer peripheral surface of the third valve plate 11.
In this embodiment, the third supporting member 14 is a circular ring structure, the outer diameter of the third supporting member 14 is equal to the inner diameter of the outer tube 3, the middle of the third supporting member 14 is provided with a step through hole, the step through hole of the third supporting member 14 contains a large inner diameter section and a small inner diameter section which are sequentially connected from top to bottom, the lower end of the third filtering net cylinder 13 is inserted into the large inner diameter section of the third supporting member 14 in a matching manner, that is, the outer diameter of the third filtering net cylinder 13 is equal to the inner diameter of the large inner diameter section of the third supporting member 14. An annular cavity is formed between the third-stage filter screen cylinder 13 and the outer pipe 3.
In this embodiment, a first spacer ring 6 is disposed between the first supporting member 5 and the second port plate 7, a second spacer ring 10 is disposed between the second supporting member 9 and the third port plate 11, a first sealing ring is disposed between the first supporting member 5 and the outer tube 3, a second sealing ring is disposed between the second supporting member 9 and the outer tube 3, and a third sealing ring is disposed between the third supporting member 14 and the outer tube 3.
In the present embodiment, the axis of the upper joint 1, the axis of the first port plate 2, the axis of the outer pipe 3, the axis of the first stage filter screen cylinder 4, the axis of the first support 5, the axis of the first spacer ring 6, the axis of the second port plate 7, the axis of the second stage filter screen cylinder 8, the axis of the second support 9, the axis of the second spacer ring 10, the axis of the third port plate 11, the axis of the third stage filter screen cylinder 13, the axis of the third support 14 and the axis of the lower joint 15 coincide.
In this embodiment, the first stage filter screen cylinder 4 and the first port plate 2 may be connected together by welding or other fixing means, and the first stage filter screen cylinder 4 and the first support 5 may be connected together by welding or other fixing means. The second stage filter screen cylinder 8 and the second port plate 7 can be connected together by welding or other fixing means, and the second stage filter screen cylinder 8 and the second supporting piece 9 can be connected together by welding or other fixing means. The third stage filter screen cylinder 13 and the third port plate 11 can be connected together by welding or other fixing means, and the third stage filter screen cylinder 13 and the third support member 14 can be connected together by welding or other fixing means.
The operation of the three-stage filtration apparatus will be described.
When the tertiary filter device is connected to the system (e.g. the tertiary filter device may be connected to the wellbore or to the surface system, depending on the actual situation at the site) the well fluid is driven from above the top sub 1.
Further fluid enters an annular space between the outer pipe 3 and the first-stage filter screen cylinder 4 through the first port plate 2, further passes through the first-stage filter screen cylinder 4, and large-particle solids are blocked in the annular space between the outer pipe 3 and the first-stage filter screen cylinder 4.
Further through the first support 5 into the inner space of the first spacer ring 6, further fluid through the second port plate 7 into the annular space between the outer pipe 3 and the second stage filter screen cylinder 8, further through the second stage filter screen cylinder 8, and the solid of the medium particles is blocked in the annular space between the outer pipe 3 and the second stage filter screen cylinder 8; further past the second support 9 into the inner space of the second spacer ring 10.
Further fluid enters an annular space between the outer pipe 3 and the third-stage filter screen cylinder 13 through the third port plate 11, and is further subjected to three-stage filtration through the third-stage filter screen cylinder 13, and small-particle solids are blocked in the annular space between the outer pipe 3 and the third-stage filter screen cylinder 13; further through the third support 14 into the lower sub 15 and further into the wellbore, completing its filtering task, as shown in fig. 2.
When the filter needs to be cleaned, cleaning liquid is pumped inwards from the lower connector 15, further passes through the third supporting piece 14, further passes through the third stage filter screen cylinder 13, further washes impurities in an annular space between the third stage filter screen cylinder 13 and the outer pipe 3, and further passes through the third port plate 11 and the second spacer ring 10 to enter the second supporting piece 9; the impurities in the annular space between the second-stage filter screen cylinder 8 and the outer pipe 3 are further washed after passing through the second-stage filter screen cylinder 8, and the impurities further enter the first supporting piece 5 after passing through the second port plate 7 and the first spacer ring 6; the impurities in the annular space between the first-stage filter screen cylinder 4 and the outer pipe 3 are further washed through the first-stage filter screen cylinder 4, and further enter a system connected with the upper connector 1 through the first port plate 2.
The three-stage filtering device can filter out mechanical impurities in sewage, so that the mechanical impurity content of the sewage is not enough to influence the viscosity of a prepared solution, and meanwhile, backwashing can be performed, so that the filtering effect is favorably improved, the field application is favorably realized, and the field is cheap to operate; is beneficial to popularization and application.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and technical scheme, technical scheme and the technical scheme all can the independent assortment use.
Claims (10)
1. The utility model provides a tertiary filter equipment, its characterized in that, this tertiary filter equipment includes outer tube (3), the one end of outer tube (3) is the entry end, the other end of outer tube (3) is the exit end, along the direction of the entry end of outer tube (3) to the exit end of outer tube (3), first valve plate (2), first order filter screen cylinder (4), first support piece (5), second valve plate (7), second level filter screen cylinder (8), second support piece (9), third valve plate (11), third level filter screen cylinder (13) and third support piece (14) have set gradually in outer tube (3), the filtration pore diameter of first order filter screen cylinder (4) is greater than the filtration pore diameter of second level filter screen cylinder (8), the filtration pore diameter of second level filter screen cylinder (8) is greater than the filtration pore diameter of third level filter screen cylinder (13).
2. The tertiary filtering device according to claim 1, characterized in that the outer tube (3) is in an upright state, the inlet end of the outer tube (3) faces upward, the outlet end of the outer tube (3) faces downward, an upper joint (1) is arranged outside the inlet end of the outer tube (3), and a lower joint (15) is arranged outside the outlet end of the outer tube (3).
3. The tertiary filtering device according to claim 2, wherein the outer peripheral surface of the first port plate (2) is of a stepped structure, the outer peripheral surface of the first port plate (2) comprises a large outer diameter section and a small outer diameter section which are sequentially connected, the small outer diameter section of the first port plate (2) is sleeved in the outer pipe (3), and the small outer diameter section of the first port plate (2) is in threaded connection with the outer pipe (3).
4. The tertiary filtering device according to claim 3, characterized in that the first port plate (2) is provided with a circular blind hole in the middle, the upper end of the first stage filter screen cylinder (4) is inserted into the circular blind hole of the first port plate (2) in a matching manner, the first port plate (2) is provided with a plurality of liquid inlet through holes, and the liquid inlet through holes of the first port plate (2) are located between the circular blind hole of the first port plate (2) and the outer peripheral surface of the first port plate (2).
5. The tertiary filtering device according to claim 2, wherein the first supporting member (5) is a circular ring structure, the outer diameter of the first supporting member (5) is equal to the inner diameter of the outer pipe (3), a stepped through hole is formed in the middle of the first supporting member (5), the stepped through hole of the first supporting member (5) comprises a large inner diameter section and a small inner diameter section which are sequentially connected, the lower end of the first stage filter screen cylinder (4) is inserted into the large inner diameter section of the first supporting member (5), and an annular cavity is formed between the first stage filter screen cylinder (4) and the outer pipe (3).
6. The tertiary filtering device according to claim 2, characterized in that the outer diameter of the second port plate (7) is equal to the inner diameter of the outer pipe (3), a round blind hole is arranged in the middle of the second port plate (7), the upper end of the second stage filter screen cylinder (8) is inserted into the round blind hole of the second port plate (7) in a matching manner, a plurality of liquid inlet through holes are arranged on the second port plate (7), and the liquid inlet through holes of the second port plate (7) are arranged between the round blind hole of the second port plate (7) and the outer peripheral surface of the second port plate (7).
7. The tertiary filtering device according to claim 2, characterized in that the second supporting member (9) is a circular ring structure, the outer diameter of the second supporting member (9) is equal to the inner diameter of the outer pipe (3), a stepped through hole is formed in the middle of the second supporting member (9), the stepped through hole of the second supporting member (9) comprises a large inner diameter section and a small inner diameter section which are sequentially connected, the lower end of the second-stage filter screen cylinder (8) is inserted into the large inner diameter section of the second supporting member (9) in a matching manner, and an annular cavity is formed between the second-stage filter screen cylinder (8) and the outer pipe (3).
8. The tertiary filtering device according to claim 2, characterized in that the outer diameter of the third port plate (11) is equal to the inner diameter of the outer pipe (3), a circular blind hole is arranged in the middle of the third port plate (11), the upper end of the third stage filter screen cylinder (13) is inserted into the circular blind hole of the third port plate (11), a plurality of liquid inlet through holes are arranged on the third port plate (11), and the liquid inlet through holes of the third port plate (11) are arranged between the circular blind hole of the third port plate (11) and the outer peripheral surface of the third port plate (11).
9. The tertiary filtering device according to claim 2, characterized in that the third supporting member (14) is a circular ring structure, the outer diameter of the third supporting member (14) is equal to the inner diameter of the outer pipe (3), a stepped through hole is formed in the middle of the third supporting member (14), the stepped through hole of the third supporting member (14) comprises a large inner diameter section and a small inner diameter section which are sequentially connected, the lower end of the third filtering screen cylinder (13) is inserted into the large inner diameter section of the third supporting member (14) in a matching manner, and an annular cavity is formed between the third filtering screen cylinder (13) and the outer pipe (3).
10. Three-stage filter device according to claim 1, wherein a first spacer ring (6) is arranged between the first support member (5) and the second port plate (7), a second spacer ring (10) is arranged between the second support member (9) and the third port plate (11), a first sealing ring is arranged between the first support member (5) and the outer tube (3), a second sealing ring is arranged between the second support member (9) and the outer tube (3), and a third sealing ring is arranged between the third support member (14) and the outer tube (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920838832.9U CN210473229U (en) | 2019-06-05 | 2019-06-05 | Three-stage filtering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920838832.9U CN210473229U (en) | 2019-06-05 | 2019-06-05 | Three-stage filtering device |
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| CN210473229U true CN210473229U (en) | 2020-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282713A (en) * | 2020-10-26 | 2021-01-29 | 张海军 | Efficient high-pressure water injection pipeline impurity collecting device and using method thereof |
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2019
- 2019-06-05 CN CN201920838832.9U patent/CN210473229U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282713A (en) * | 2020-10-26 | 2021-01-29 | 张海军 | Efficient high-pressure water injection pipeline impurity collecting device and using method thereof |
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