CN113638712B - Reverse gravel throwing device - Google Patents
Reverse gravel throwing device Download PDFInfo
- Publication number
- CN113638712B CN113638712B CN202111003682.8A CN202111003682A CN113638712B CN 113638712 B CN113638712 B CN 113638712B CN 202111003682 A CN202111003682 A CN 202111003682A CN 113638712 B CN113638712 B CN 113638712B
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- Prior art keywords
- outer side
- cone
- gravel
- threads
- reverse
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- 238000007789 sealing Methods 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims abstract description 4
- 229910052770 Uranium Inorganic materials 0.000 abstract description 8
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 10
- 238000005553 drilling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1293—Packers; Plugs with mechanical slips for hooking into the casing with means for anchoring against downward and upward movement
-
- 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
- E21B43/04—Gravelling of wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a reverse gravel throwing device, which relates to the technical field of uranium ore development supporting equipment, and solves the problems that gravel easily floats out of a shaft, so that gravel is insufficiently filled, and later collapse easily causes huge loss, and comprises an upper cone, a stuck barrel and a sieve tube; the lower end of the lock ring sleeve, the rubber cylinder and the rubber cylinder compression ring sleeve are sleeved outside the rubber cylinder bushing; the upper end of the upper cone is connected with the outer side of the lower end of the rubber sleeve bushing through threads; the screen pipe is fixedly connected with the lower end of the connector and the upper end of the lower connector through welding; the outer side of the lower end of the lower joint is connected with the inner side of the upper end of the sealing seat through threads; the outer side of the lower end of the sealing seat is connected with the inner side of the upper end of the circulating sleeve through threads; the lower end of the sealing seat is also provided with a combined page switch. The device has stable performance, can ensure that gravel can not be circularly carried out of the shaft in the gravel throwing process, the gravel is fully thrown into the production horizon, and the gravel can not return out of the shaft after well completion, thereby effectively avoiding huge loss.
Description
Technical Field
The invention relates to the technical field of uranium ore development supporting equipment, in particular to a reverse gravel throwing device.
Background
Along with the operation of the in-situ leaching uranium mining mine, the drilling hole can be rapidly reduced in liquid extraction amount due to various problems, liquid extraction and liquid injection operation cannot be completed, the drilling hole becomes invalid, and the filter is blocked or damaged to be a main cause of the drilling hole invalidation, so that a gravel throwing pipe is required to be thrown into the outside of the casing pipe after the casing pipe is put into the casing pipe, and the drilling hole can be repaired.
Based on the above, the inventor finds that in the uranium ore development production process, after the on-site leaching uranium mining drilling hole is used for casing cementing, the well completion is carried out after the casing and the cement ring outside the casing are cut, but the density of the gravel material is smaller than that of water, the gravel material floats on the surface of liquid after being mixed with the water, so that the gravel material continuously floats out of a shaft in the gravel casting process, the circulating gravel casting filling is insufficient, the stratum is easy to collapse to bury the shaft in the later production process, the re-casting of the gravel is needed, the uranium mine is scrapped due to the heavy weight, and huge loss is caused; therefore, the existing demand is not met, and a reverse gravel pack device is proposed.
Disclosure of Invention
The invention aims to provide a reverse gravel throwing device, which is used for solving the problems that in the background technology, after a casing is well cemented in an on-site immersed uranium mining drill hole, gravel is circularly thrown to a layer of a cement ring outside a cut casing and the casing, and then well completion is carried out, but because the density of the thrown gravel is smaller than that of water, the thrown gravel floats on the surface of liquid after being mixed with the water, the gravel continuously floats out of a shaft in the gravel throwing process, the circulation gravel throwing is insufficient, stratum is easy to collapse to bury the shaft in the later production process, the re-throwing of the gravel is needed, the uranium mine is scrapped due to heavy weight, and huge loss is caused.
In order to achieve the above purpose, the present invention provides the following technical solutions: the reverse gravel throwing device comprises a pull rod, a unsealing joint, a rubber sleeve bushing, an upper cone, a tile clamping cylinder, a limiting ring and a screen pipe; the upper part of the pull rod is connected with the setting tool through threads; the lower part of the pull rod is riveted with the lower cone through a releasing shear pin; the unsealing joint is fixedly arranged in an inner hole of the setting joint through a setting pin; the lower part of the unsealing head is positioned at the outer side of the locking ring seat and is fixed on the locking ring seat through unsealing pins; the lower end of the setting joint is connected with the upper end of the locking ring sleeve through threads; a lock ring is arranged in the lock ring sleeve; the rubber sleeve bushing is sleeved on the outer side of the lock ring seat, and the connection position between the upper end of the rubber sleeve bushing and the lock ring seat is sealed through an O-shaped ring; the lower end of the lock ring sleeve, the rubber cylinder and the rubber cylinder compression ring sleeve are sleeved outside the rubber cylinder bushing; the upper end of the upper cone is connected with the outer side of the lower end of the rubber sleeve bushing through threads; the slip cylinder is sleeved outside the upper cone and the lower cone; four slips are also arranged in the slip barrel; the grooves on the outer sides of the four slips are respectively provided with a pressure spring; the upper end of the lower cone is connected with the outer side of the lower end of the locking ring seat through threads, and the contact surface of the lower cone and the locking ring seat is also sealed through an O-shaped ring; the outer side of the limiting ring is connected with the inner side of the tile clamping cylinder through threads; the lower end of the lower cone is connected with the inner side of the connector through threads; the screen pipe is fixedly connected with the lower end of the connector and the upper end of the lower connector through welding; the outer side of the lower end of the lower joint is connected with the inner side of the upper end of the sealing seat through threads; the outer side of the lower end of the sealing seat is connected with the inner side of the upper end of the circulating sleeve through threads; the lower end of the sealing seat is also provided with a combined page switch.
Preferably, four inclined planes are arranged on one sides of the upper cone and the lower cone, which are close to the slips, and corresponding inclined planes are also arranged at the top and the bottom of the four slips.
Preferably, the inclined surfaces on the outer sides of the upper cone and the lower cone are provided with four groups, the four groups of inclined surfaces correspond up and down, and other positions are planes.
Preferably, the setting joint is capable of sliding up and down outside the unsealing joint, and the setting pin is capable of breaking when the setting joint slides down.
Preferably, the outer side of the tile clamping cylinder is provided with four rectangular openings in an annular arrangement, and the compression spring can penetrate through the rectangular openings to extend outwards when the slips slide outwards.
Preferably, the outer side of the circulating sleeve is provided with four strip-shaped openings, and the outer side of the sieve tube is provided with a plurality of small holes in an annular arrangement.
Preferably, the lower end of the cavity in the sealing seat is of a funnel-shaped structure, and the bottom end of the gravel throwing pipe is downwards inserted into the sealing seat from the opening at the upper end of the device during gravel throwing.
Preferably, the locking ring sleeve can also slide up and down on the outer side of the unsealing joint, and the rubber cylinder compression ring can slide up and down on the outer side of the rubber cylinder bushing.
Preferably, the inclined surfaces on the upper cone and the lower cone are respectively embedded with the inclined surfaces on the upper end and the lower end of the slips, and when the upper cone slides downwards, the slips are pushed to slide outwards.
Preferably, the upper cone is capable of sliding up and down in a cavity between the outside of the lock ring seat and the inside of the slip barrel.
Compared with the prior art, the invention has the beneficial effects that:
1. The sealing seat is used for being embedded with the gravel throwing pipe for throwing materials, the bottom end of the gravel throwing pipe can form sealing with the funnel-shaped cavity in the sealing seat during throwing materials, then the gravel can enter a position to be filled with the gravel through the opening at the outer side of the circulating sleeve, the rubber sleeve can play a role in sealing, only liquid can circulate out of the shaft through the sieve sleeve and the annular space, and the hinge switch is automatically closed after the gravel throwing pipe is pulled out, so that the gravel flows into the shaft.
2. The outer sides of the upper cone and the lower cone are respectively provided with an inclined surface corresponding to the upper end and the lower end of the slips, the slips and the pressure springs at the outer sides of the slips can be pushed to move outwards when the upper cone moves downwards, the clamp springs are used for anchoring the device on a sleeve, and four rectangular openings which can enable the clamp springs to extend outwards are arranged on the clamp sleeve, so that the device is required to be anchored more simply and conveniently.
Drawings
FIG. 1 is a schematic view of a front view of the present invention rotated 90 degrees and cut away;
FIG. 2 is a schematic view of a partial axial side structure of the slips and compression spring positions of the present invention;
FIG. 3 is a schematic view of a partially cut-away construction of the slips and compression springs of the present invention;
FIG. 4 is a schematic view of the upper cone of the present invention in partial cross-section after sliding down;
FIG. 5 is a schematic view of a partial axial side construction of the slip and cone of the present invention after disassembly;
FIG. 6 is a schematic view of the axial structure of the seal seat of the present invention;
FIG. 7 is a schematic view of the axial structure of the circulation sleeve of the present invention;
FIG. 8 is a schematic illustration of the axial side construction of a screen of the present invention;
In the figure: 1. a pull rod; 2. setting a joint; 3. deblocking the joint; 4. setting pins; 5. a locking ring; 6. a lock ring sleeve; 7. a lock ring seat; 8. deblocking the pin; 9. an O-ring; 10. a rubber cylinder; 11. a rubber sleeve bushing; 12. a rubber cylinder compression ring; 13. an upper cone; 14. a tile clamping cylinder; 15. a slip; 16. a pressure spring; 17. a lower cone; 18. a limiting ring; 19. releasing shear pins; 20. a connector; 21. a screen pipe; 22. a lower joint; 23. a sealing seat; 24. a circulating sleeve; 25. and a hinge switch.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 8, an embodiment of the present invention provides: the reverse gravel throwing device comprises a pull rod 1, a unsealing joint 3, a rubber cylinder bushing 11, an upper cone 13, a clamp cylinder 14, a limiting ring 18 and a screen pipe 21; the upper part of the pull rod 1 is connected with a setting tool through threads; the lower part of the pull rod 1 is riveted with the lower cone 17 through a releasing shear pin 19; the deblocking joint 3 is fixedly arranged in an inner hole of the setting joint 2 through a setting pin 4; the setting joint 2 can slide up and down on the outer side of the unsealing joint 3, and when the setting joint 2 slides downwards, the setting pin 4 can be broken, so that the lower locking ring sleeve 6, the rubber cylinder 10 and the rubber cylinder compression ring 12 can be pushed to slide downwards; the lower part of the unsealing head 3 is positioned at the outer side of the locking ring seat 7 and is fixed on the locking ring seat 7 through the unsealing pin 8;
The lower end of the setting joint 2 is connected with the upper end of the locking ring sleeve 6 through threads; the locking ring sleeve 6 can also slide up and down on the outer side of the unsealing joint 3, the rubber cylinder 10 and the rubber cylinder compression ring 12 can slide up and down on the outer side of the rubber cylinder bushing 11, and then the lower upper cone 13 can be pushed to slide down to anchor the device; a lock ring 5 is arranged in the lock ring sleeve 6; the rubber sleeve 11 is sleeved outside the lock ring seat 7, and the connection position between the upper end of the rubber sleeve and the lock ring seat 7 is sealed by an O-shaped ring 9; the lower end of the lock ring sleeve 6, the rubber cylinder 10 and the rubber cylinder compression ring 12 are sleeved outside the rubber cylinder bushing 11; the upper end of the upper cone 13 is connected with the outer side of the lower end of the rubber sleeve 11 through threads;
Four inclined planes are arranged on one side of the upper cone 13 and one side of the lower cone 17, which are close to the slips 15, and corresponding inclined planes are also arranged on the top and the bottom of the four slips 15, and when the upper cone 13 slides downwards, the slips 15 are pushed to slide outwards through the inclined planes at the lower end of the upper cone 13 and the inclined planes at the upper end of the lower cone 17, so that a compression spring 16 at the outer side of the slips 15 passes through an opening on the slip clamping cylinder 14 to extend outwards and be anchored on a sleeve; the upper cone 13 can slide up and down in the cavity between the outer side of the lock ring seat 7 and the inner side of the slip barrel 14, so that the device can be anchored on a sleeve; the tile cylinder 14 is sleeved outside the upper cone 13 and the lower cone 17; four rectangular openings are arranged on the outer side of the tile clamping cylinder 14 in an annular arrangement, and when the slips 15 slide outwards, the compression springs 16 can extend outwards through the rectangular openings, so that the device can be anchored on a sleeve; four slips 15 are also arranged in the tile clamping cylinder 14; a compression spring 16 is also arranged in the groove at the outer side of each slip 15;
The upper end of the lower cone 17 is connected with the outer side of the lower end of the locking ring seat 7 through threads, and the contact surface of the lower cone 17 and the locking ring seat 7 is also sealed through an O-shaped ring 9; the outer side of the limiting ring 18 is connected with the inner side of the slip barrel 14 through threads; the lower end of the lower cone 17 is connected with the inner side of the connector 20 through threads; the screen 21 is fixedly connected with the lower end of the connector 20 and the upper end of the lower connector 22 through welding; the outer side of the lower end of the lower joint 22 is connected with the inner side of the upper end of the sealing seat 23 through threads; the lower end of the cavity in the sealing seat 23 is of a funnel-shaped structure, and the bottom end of the gravel-throwing cannula is downwards inserted into the sealing seat 23 from an opening at the upper end of the device during gravel throwing, so that the bottom end of the gravel-throwing cannula can form a seal with the conical surface of the sealing seat 23; the outer side of the lower end of the sealing seat 23 is connected with the inner side of the upper end of the circulating sleeve 24 through threads; the lower end of the sealing seat 23 is also provided with a combination page switch 25.
Further, the inclined surfaces on the outer sides of the upper cone 13 and the lower cone 17 are provided with four groups, the four groups of inclined surfaces vertically correspond, and other positions are all plane surfaces, so that the positions of the four groups of slips 15 can be limited, and the slips 15 are prevented from being shifted.
Further, four strip-shaped openings are formed in the outer side of the circulation sleeve 24, a plurality of small holes are formed in the outer side of the screen pipe 21 in an annular arrangement, mixed liquid in the ground stirring tank is pumped into a gravel pipe column through a gravel pump during use, enters a position to be filled with gravel through a gravel throwing pipe through an opening groove of the circulation sleeve 24, the screen pipe 21 can play a blocking role on the gravel, and only the liquid can circulate out of a shaft through the screen pipe 21 and through an annular space.
Further, the inclined surfaces on the upper cone 13 and the lower cone 17 are respectively embedded with the inclined surfaces on the upper end and the lower end of the slips 15, when the upper cone 13 slides downwards, the slips 15 are pushed to slide outwards through the inclined surfaces on the lower end and the upper end of the lower cone 17, so that the compression springs 16 on the outer side of the slips 15 extend outwards through the openings on the tile clamping barrel 14 and are anchored on the sleeve.
In another embodiment, a layer of rubber film is fixedly arranged inside the four rectangular openings at the outer side of the tile clamping cylinder 14, and the pressure spring 16 can push the layer of rubber film to bulge outwards to deform when the slips 15 slide outwards, so that the device is anchored on the sleeve, and the layer of rubber can play a role in preventing external sand particles from entering the tile clamping cylinder 14.
Working principle: when in use, the upper end of the pull rod 1 of the reverse gravel throwing device is fixedly connected with a setting tool through a threaded hole, then the device is lowered to the underground, when the device is lowered to the underground design position, the setting tool hydraulic cylinder pushing cylinder pushes the setting joint 2 in the device to move downwards at the outer side of the unsealing joint 3, at the moment, the setting pin 4 is sheared after being extruded, then the setting joint 2 pushes the lock ring sleeve 6 to move downwards, at the moment, the lock ring sleeve 6 pushes the upper cone 13 to slide downwards at the outer side of the lock ring seat 7 through the rubber cylinder 10 and the rubber cylinder compression ring 12, and the upper cone 13 pushes the slips 15 to slide outwards through the inclined surfaces at the lower end and the upper end of the lower cone 17 when sliding downwards, so that the pressure spring 16 at the outer side of the slips 15 penetrates through the opening of the tile clamping cylinder 14 to extend outwards to be anchored on the sleeve, at the same time, the rubber cylinder 10 is extruded to compress the inner sealing annular space, simultaneously, the lock ring 5 is meshed with the zigzag thread of the lock ring sleeve 6, when the setting force exceeds the tensile limit of the releasing shear pin 19, the releasing shear pin 19 is broken, the reverse gravel throwing device sets the releasing, after the setting tool is lifted out, the gravel throwing pipe is connected to the lower end of the gravel throwing pipe column, when the distance from the reverse gravel throwing device to the left and right is two meters, the gravel throwing pipe column is slowly lowered, the bottom end of the gravel throwing pipe column is downwards inserted into the sealing seat 23 from the opening at the upper end of the device, the hinge switch 25 is opened by the gravel throwing pipe, the gravel throwing pipe forms a seal with the conical surface of the sealing seat 23, when the gravel throwing pipe is circulated, mixed liquid in the ground stirring tank is pumped into the gravel throwing pipe column through the gravel throwing pipe column, enters the layer to be filled with gravel through the opening groove of the circulating sleeve 24, and the gravel is reserved at the target layer due to the blocking of the sealing sleeve 10 and the screen 21 of the device, the liquid circulates out of the shaft through the sieve tube 21 and after the gravel is thrown, the gravel throwing pipe is pulled out, the hinge switch 25 is automatically closed, and the gravel is prevented from flowing into the shaft.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A reverse gravel throwing device, characterized in that: the reverse gravel throwing device comprises:
The sealing device comprises a pull rod (1), a unsealing head (3), a rubber sleeve bushing (11), an upper cone (13), a slip barrel (14), a limiting ring (18) and a screen pipe (21); the upper part of the pull rod (1) is connected with a setting tool through threads; the lower part of the pull rod (1) is riveted with the lower cone (17) through a releasing shear pin (19); the deblocking joint (3) is fixedly arranged in an inner hole of the setting joint (2) through a setting pin (4); the lower part of the deblocking connector (3) is positioned at the outer side of the locking ring seat (7) and is fixed on the locking ring seat (7) through a deblocking pin (8); the lower end of the setting joint (2) is connected with the upper end of the locking ring sleeve (6) through threads; a lock ring (5) is arranged in the lock ring sleeve (6); the rubber sleeve bushing (11) is sleeved outside the lock ring seat (7), and the connection position between the upper end of the rubber sleeve bushing and the lock ring seat (7) is sealed by an O-shaped ring (9); the lower end of the lock ring sleeve (6), the rubber cylinder (10) and the rubber cylinder compression ring (12) are sleeved outside the rubber cylinder bushing (11); the upper end of the upper cone (13) is connected with the outer side of the lower end of the rubber sleeve bushing (11) through threads; the slip cylinder (14) is sleeved outside the upper cone (13) and the lower cone (17); four slips (15) are also arranged in the slip barrel (14); the grooves on the outer sides of the four slips (15) are respectively provided with a pressure spring (16); the upper end of the lower cone (17) is connected with the outer side of the lower end of the locking ring seat (7) through threads, and the contact surface of the lower cone (17) and the locking ring seat (7) is also sealed through an O-shaped ring (9); the outer side of the limiting ring (18) is connected with the inner side of the slip barrel (14) through threads; the lower end of the lower cone (17) is connected with the inner side of the connector (20) through threads; the screen pipe (21) is fixedly connected with the lower end of the connector (20) and the upper end of the lower connector (22) through welding; the outer side of the lower end of the lower joint (22) is connected with the inner side of the upper end of the sealing seat (23) through threads; the outer side of the lower end of the sealing seat (23) is connected with the inner side of the upper end of the circulating sleeve (24) through threads; the lower end of the sealing seat (23) is also provided with a combined page switch (25).
2. A reverse pebble bed unit as claimed in claim 1, wherein: the setting joint (2) can slide up and down on the outer side of the unsealing joint (3), and the setting pin (4) can be broken when the setting joint (2) slides downwards.
3. A reverse pebble bed unit as claimed in claim 1, wherein: the locking ring sleeve (6) can also slide up and down on the outer side of the unsealing joint (3), and the rubber cylinder (10) and the rubber cylinder compression ring (12) can slide up and down on the outer side of the rubber cylinder lining (11).
4. A reverse pebble bed unit as claimed in claim 1, wherein: the upper cone (13) can slide up and down in a cavity between the outer side of the lock ring seat (7) and the inner side of the slip barrel (14).
5. A reverse pebble bed unit as claimed in claim 4, wherein: four inclined planes are arranged on one sides of the upper cone (13) and the lower cone (17) close to the slips (15), and corresponding inclined planes are also arranged at the top and the bottom of the four slips (15).
6. A reverse pebble bed unit as claimed in claim 5, wherein: the inclined surfaces on the upper cone (13) and the lower cone (17) are respectively embedded with the inclined surfaces at the upper end and the lower end of the slips (15), and when the upper cone (13) slides downwards, the slips (15) are pushed to slide outwards.
7. A reverse pebble bed unit as claimed in claim 6, wherein: four groups of inclined surfaces on the outer sides of the upper cone (13) and the lower cone (17) are arranged in total, the four groups of inclined surfaces correspond up and down, and other positions are planes.
8. A reverse pebble bed unit as claimed in claim 4, wherein: the outer side of the slip barrel (14) is provided with four rectangular openings in an annular arrangement, and when the slips (15) slide outwards, the compression springs (16) can extend outwards through the rectangular openings.
9. A reverse pebble bed unit as claimed in claim 1, wherein: the lower end of the cavity in the sealing seat (23) is of a funnel-shaped structure, and the bottom end of the gravel throwing pipe is downwards inserted into the sealing seat (23) from an opening at the upper end of the device during gravel throwing.
10. A reverse pebble bed unit as claimed in claim 1, wherein: four strip-shaped openings are formed in the outer side of the circulating sleeve (24), and a plurality of small holes are formed in the outer side of the screen pipe (21) in an annular arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111003682.8A CN113638712B (en) | 2021-08-30 | 2021-08-30 | Reverse gravel throwing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111003682.8A CN113638712B (en) | 2021-08-30 | 2021-08-30 | Reverse gravel throwing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113638712A CN113638712A (en) | 2021-11-12 |
| CN113638712B true CN113638712B (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111003682.8A Active CN113638712B (en) | 2021-08-30 | 2021-08-30 | Reverse gravel throwing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113638712B (en) |
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| CA2789859A1 (en) * | 2011-09-16 | 2013-03-16 | Weatherford/Lamb, Inc. | Gravel pack and sand disposal device |
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Denomination of invention: A reverse gravel throwing device Granted publication date: 20240528 Pledgee: Industrial and Commercial Bank of China Limited Funing Branch Pledgor: FUNING COUNTY HONGDA PETROCHEMICAL MACHINERY Co.,Ltd. Registration number: Y2024990000257 |
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