CN113882819A - Deep well sand removal system - Google Patents
Deep well sand removal system Download PDFInfo
- Publication number
- CN113882819A CN113882819A CN202111287206.3A CN202111287206A CN113882819A CN 113882819 A CN113882819 A CN 113882819A CN 202111287206 A CN202111287206 A CN 202111287206A CN 113882819 A CN113882819 A CN 113882819A
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- Prior art keywords
- wall
- sand
- pipe
- oil pipe
- fixed
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004576 sand Substances 0.000 title claims abstract description 63
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000003129 oil well Substances 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 238000009792 diffusion process Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 description 8
- 238000005507 spraying Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
- E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation 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
- E21B33/127—Packers; Plugs with inflatable sleeve
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a deep well sand removal system, comprising: four-way connection; a tee joint; a self-sealing blowout preventer; the tee joint is characterized in that an extension sealing barrel is fixed inside the tee joint, a blowout preventer rubber core is arranged inside the self-sealing blowout preventer, an oil pipe located inside an oil well is inserted into the blowout preventer rubber core, a pipe sealer arranged on the outer wall of the oil pipe is fixedly sleeved in a bottom port of the extension sealing barrel, two underground switch valves arranged up and down are arranged on the outer wall of the oil pipe, and a negative pressure sand sucker is connected to the bottom end of the oil pipe. The deep well sand cleaning system has reasonable structural design, continuous high-pressure liquid is injected into an annular cavity between a four-way directional oil well and an oil pipe and is upwards sprayed through a lifting nozzle to form low pressure at a well bottom, settled sand at the well bottom is finally sucked and lifted to the ground, a side hole of an upper underground switch valve is communicated, a side hole of a lower underground switch valve is closed when the lower underground switch valve passes through a pipe sealer, power liquid circulation is realized, and the operation is simple, convenient and feasible and has high speed.
Description
Technical Field
The invention relates to a deep well sand removal system.
Background
In oilfield production, sand production is an inevitable problem. At present, the oil well sand washing process mainly comprises conventional oil pipe sand washing, concentric pipe sand washing, coiled tubing sand washing and the like. For a deep well with lower bottom pressure, circulation cannot be established between conventional oil pipe sand washing and continuous oil pipe sand washing, and sand washing liquid is leaked; the concentric tube sand washing needs to be carried out by a single tube, so that the on-site operation time is long, the labor intensity is high, the operation cost is high, and the large-scale popularization cannot be realized. Therefore, a deep well sand cleaning system is urgently needed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a deep well sand removal system.
The deep well sand removal system of the invention comprises:
the cross joint is fixed at the top of the oil well through bolts;
the tee joint is fixed at the top of the tee joint through a bolt;
the self-sealing blowout preventer is fixed at the top of the tee joint through a bolt;
the method is characterized in that: an extension sealing barrel is fixed inside the tee joint, a blowout preventer rubber core is arranged inside the self-sealing blowout preventer, an oil pipe positioned inside an oil well is inserted inside the blowout preventer rubber core, a pipe sealer sleeved on the outer wall of the oil pipe is fixed in a bottom port of the extension sealing barrel, two underground switch valves which are arranged up and down are arranged on the outer wall of the oil pipe, and a negative pressure sand sucker is connected to the bottom end of the oil pipe; the negative pressure sand suction device comprises an outer barrel, a sand cleaning packer is fixed on the outer wall of the outer barrel, the outer wall of the outer barrel is close to the top end, a diffusion pipe is arranged inside the outer barrel, the top end of the diffusion pipe is fixed with the outer barrel, the outer barrel is fixedly connected with an oil pipe, a sand stirring spray hole and a sand suction hole are formed in the outer wall of the bottom end head of the outer barrel, a bridge type barrel connected with the diffusion pipe is fixed inside the bottom end head of the outer barrel, and a lifting spray nozzle is fixed in the top end opening of the bridge type barrel.
In the structure, the underground switch valve comprises an outer pipe and a sliding sleeve arranged inside the outer pipe in a sliding mode, the top end of the sliding sleeve is sealed, a first side hole is formed in the outer wall of the sliding sleeve, close to the top end, of the outer wall of the outer pipe, a second side hole corresponding to the first side hole is formed in the outer wall of the outer pipe, an inner pipe is inserted into a bottom port of the sliding sleeve, a lower connector is connected to the outer wall of the bottom port of the inner pipe through threads, and the outer wall of the top port of the lower connector is connected with the inner wall of the bottom port of the outer pipe through threads.
In the structure, the outer wall of the bridge type cylinder is provided with a liquid inlet communicated with the lifting nozzle, and a bridge type liquid suction hole which is communicated up and down is arranged between the upper end surface and the lower end surface of the bridge type cylinder.
In the structure, a plurality of liquid injection holes are formed in the outer wall of the outer barrel above the sand removal packer, and a cavity formed between the outer barrel and the diffusion pipe is communicated with the liquid injection holes.
Compared with the prior art, the invention has the beneficial effects that: the deep well sand cleaning system has reasonable structural design, continuous high-pressure liquid is injected into an annular cavity between a four-way directional oil well and an oil pipe and is upwards sprayed through a lifting nozzle to form low pressure at a well bottom, settled sand at the well bottom is finally sucked and lifted to the ground, a side hole of an upper underground switch valve is communicated, a side hole of a lower underground switch valve is closed when the lower underground switch valve passes through a pipe sealer, power liquid circulation is realized, and the operation is simple, convenient and feasible and has high speed.
Drawings
Fig. 1 is a schematic structural diagram of a deep well sand removal system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a negative pressure sand sucker in the deep well sand cleaning system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a downhole switch valve in the deep well sand removal system according to an embodiment of the present invention;
fig. 4 is a second schematic structural diagram of a downhole switch valve in the deep well sand cleaning system according to the embodiment of the invention.
In the figure:
1. four-way connection; 2. an oil well; 3. a tee joint; 4. a self-sealing blowout preventer; 5. extending the sealing cylinder; 6. a blowout preventer rubber core; 7. an oil pipe; 8. a pipe sealer; 9. a downhole on-off valve; 10. a negative pressure sand sucker; 11. an outer cylinder; 12. stirring sand and spraying holes; 13. a sand suction hole; 14. stirring sand and spraying holes; 15. a sand suction hole; 16. a bridge drum; 17. lifting the nozzle; 18. an outer tube; 19. a sliding sleeve; 20. a first side hole; 21. a second side hole; 22. an inner tube; 23. a lower joint; 24. a liquid inlet; 25. a bridge type liquid suction hole; 26. and a liquid injection hole.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1-4, a deep well sand cleaning system comprises:
the cross joint 1 is fixed at the top of the oil well 2 through bolts;
the tee joint 3 is fixed at the top of the four-way joint 1 through bolts;
the self-sealing blowout preventer 4 is fixed at the top of the tee joint 3 through a bolt;
the method is characterized in that: an extension sealing barrel 5 is fixed in the tee joint 3, a blowout preventer rubber core 6 is arranged in the self-sealing blowout preventer 4, an oil pipe 7 positioned in the oil well 2 is inserted in the blowout preventer rubber core 6, a pipe sealer 8 sleeved on the outer wall of the oil pipe 7 is fixed in a bottom port of the extension sealing barrel 5, two underground switch valves 9 which are arranged up and down are arranged on the outer wall of the oil pipe 7, a negative pressure sand sucker 10 is connected at the bottom end of the oil pipe 7, the negative pressure sand sucker 10 comprises an outer barrel 11, a sand cleaning packer 12 is fixed on the outer wall of the outer barrel 11 near the top end, a diffusion pipe 13 is arranged in the outer barrel 11, the top end of the diffusion pipe 13 is fixed with the outer barrel 11, the outer barrel 11 is fixedly connected with the oil pipe 7, a sand stirring spray hole 14 and a sand sucking hole 15 are arranged on the outer wall of the bottom end of the outer barrel 11, a bridge tube 16 connected to the diffuser tube 13 is fixed to the inside of the bottom end of the outer tube 11, and a lift nozzle 17 is fixed to the top end opening of the bridge tube 16.
In the above structure, the downhole switch valve 9 includes the outer tube 18 and the sliding sleeve 19 that slides and sets up inside the outer tube 18, the top of the sliding sleeve 19 is sealed the outer wall of the sliding sleeve 19 on be close to top department and be equipped with first side hole 20 the outer wall of the outer tube 18 on be equipped with the second side hole 21 corresponding with first side hole 20 the bottom mouth interpolation of the sliding sleeve 19 be equipped with inner tube 22 the bottom mouth outer wall of inner tube 22 on have lower clutch 23 through threaded connection, the top mouth outer wall of lower clutch 23 with the bottom mouth inner wall of the outer tube 18 between through threaded connection.
In the above structure, a liquid inlet 24 communicated with the lifting nozzle 17 is arranged on the outer wall of the bridge type cylinder 16, and a bridge type liquid suction hole 25 which is communicated up and down is arranged between the upper end surface and the lower end surface of the bridge type cylinder 16.
In the structure, a plurality of liquid injection holes 26 are arranged on the outer wall of the outer cylinder 11 above the sand removal packer 12, and a cavity formed between the outer cylinder 11 and the diffusion pipe 13 is communicated with the liquid injection holes 26.
When the deep well sand cleaning system works specifically, continuous high-pressure liquid is injected into an annular cavity between a four-way directional oil well and an oil pipe, meanwhile, a first side hole and a second side hole of an upper underground switch valve are communicated due to position coincidence (as shown in figure 3), an upward channel of the underground switch valve is in a closed state, and in order to keep the side holes in an open state, the high-pressure liquid is injected into the oil pipe above the upper underground switch valve. When the underground switch valve at the lower part works, the sliding sleeve moves upwards under the action of high-pressure liquid at the lower part, the upward channel is opened, the first side hole and the second side hole are closed in a staggered way (as shown in figure 4), the power liquid firstly enters the inner cavity of the outer barrel through the liquid injection hole, then enters the lifting nozzle through the liquid inlet, forms a low-pressure area at the bottom of the well, and sucks the sand and water stirred by the sand stirring and spraying hole into the diffusion pipe through the sand sucking hole and the bridge type liquid sucking hole, because the upward channel of the lower underground switch valve is opened, the sand and water stirred by the sand stirring and spraying hole are continuously transported upwards through the oil pipe, when the underground switch valve reaches the upper part, because the side hole is communicated, sand and water stirred by the sand stirring and spraying hole enter the annular cavity in the extension sealing cylinder and are finally lifted to the ground, thereby not only saving the operation cost, and technically, the operation effect which cannot be achieved by the conventional horizontal well flushing and sand removing tubular column technology can be realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A deep well sand removal system comprising:
the cross joint (1) is fixed at the top of the oil well (2) through bolts;
the tee joint (3) is fixed at the top of the four-way joint (1) through bolts;
the self-sealing blowout preventer (4) is fixed at the top of the tee joint (3) through a bolt;
the method is characterized in that: an extension sealing barrel (5) is fixed in the tee joint (3), a blowout preventer rubber core (6) is arranged in the self-sealing blowout preventer (4), an oil pipe (7) positioned in an oil well (2) is inserted in the blowout preventer rubber core (6), a pipe sealer (8) sleeved on the outer wall of the oil pipe (7) is fixed in a bottom port of the extension sealing barrel (5), two underground switch valves (9) arranged up and down are arranged on the outer wall of the oil pipe (7), a negative pressure sand sucker (10) is connected to the bottom end of the oil pipe (7), the negative pressure sand sucker (10) comprises an outer barrel (11), a sand cleaning packer (12) is fixed on the outer wall of the outer barrel (11) close to the top end, a diffusion pipe (13) is arranged in the outer barrel (11), and the top end of the diffusion pipe (13) is fixed with the outer barrel (11), the outer cylinder (11) is fixedly connected with the oil pipe (7), a sand stirring spray hole (14) and a sand sucking hole (15) are formed in the outer wall of the bottom end of the outer cylinder (11), a bridge type cylinder (16) connected with the diffusion pipe (13) is fixed inside the bottom end of the outer cylinder (11), and a lifting nozzle (17) is fixed in the top port of the bridge type cylinder (16).
2. The deep well sand removal system according to claim 1, wherein: downhole switch valve (9) include outer tube (18) and slide and set up sliding sleeve (19) inside outer tube (18), the top of sliding sleeve (19) seal the outer wall of sliding sleeve (19) on be close to top department and be equipped with first side opening (20) the outer wall of outer tube (18) on be equipped with second side opening (21) corresponding with first side opening (20) the bottom mouth interpolation of sliding sleeve (19) be equipped with inner tube (22) the bottom mouth outer wall of bottom inner tube (22) on have lower clutch (23) through threaded connection, the top mouth outer wall of lower clutch (23) with the bottom mouth inner wall of outer tube (18) between through threaded connection.
3. The deep well sand removal system according to claim 1, wherein: a liquid inlet (24) communicated with the lifting nozzle (17) is arranged on the outer wall of the bridge type cylinder (16), and a bridge type liquid suction hole (25) which is communicated up and down is arranged between the upper end surface and the lower end surface of the bridge type cylinder (16).
4. The deep well sand removal system according to claim 1, wherein: a plurality of liquid injection holes (26) are formed in the outer wall of the outer barrel (11) above the sand removal packer (12), and a cavity formed between the outer barrel (11) and the diffusion pipe (13) is communicated with the liquid injection holes (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111287206.3A CN113882819A (en) | 2021-11-02 | 2021-11-02 | Deep well sand removal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111287206.3A CN113882819A (en) | 2021-11-02 | 2021-11-02 | Deep well sand removal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113882819A true CN113882819A (en) | 2022-01-04 |
Family
ID=79015281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111287206.3A Pending CN113882819A (en) | 2021-11-02 | 2021-11-02 | Deep well sand removal system |
Country Status (1)
| Country | Link |
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| CN (1) | CN113882819A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
| CN115075745A (en) * | 2022-08-23 | 2022-09-20 | 东营政阳自动化科技有限公司 | Oil is safety joint in pit |
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| US4223724A (en) * | 1976-12-22 | 1980-09-23 | Levoni Carlo F | Device for cleaning, widening and repairing wells of drinking water and irrigation water |
| US5280825A (en) * | 1991-06-21 | 1994-01-25 | Institut Francais Du Petrole | Device and installation for the cleaning of drains, particularly in a petroleum production well |
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| CN108119073A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | Reverse circulation sand washing well-flushing pipe column |
| CN110821425A (en) * | 2019-12-31 | 2020-02-21 | 中国石油大学(华东) | Coal-bed gas well wall cleaning equipment and circulating well cleaning method |
| CN111075372A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Continuous reverse circulation sand washing well washing pipe column and sand washing tool thereof |
| CN113279710A (en) * | 2021-06-09 | 2021-08-20 | 克拉玛依市恩能胜石油科技有限公司 | Deep well sand removal system |
-
2021
- 2021-11-02 CN CN202111287206.3A patent/CN113882819A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU134233A1 (en) * | 1960-03-21 | 1960-11-30 | М.А. Еремян | Well flushing device |
| US4223724A (en) * | 1976-12-22 | 1980-09-23 | Levoni Carlo F | Device for cleaning, widening and repairing wells of drinking water and irrigation water |
| US5280825A (en) * | 1991-06-21 | 1994-01-25 | Institut Francais Du Petrole | Device and installation for the cleaning of drains, particularly in a petroleum production well |
| CN201347732Y (en) * | 2009-01-21 | 2009-11-18 | 大庆油田有限责任公司 | Non-pumping off continuous sand washing device for oil water well |
| CN102094586A (en) * | 2010-12-24 | 2011-06-15 | 中国石油天然气股份有限公司 | Horizontal well sand washing ground device and using method thereof |
| WO2014190518A1 (en) * | 2013-05-30 | 2014-12-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-discharging device |
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| CN108119073A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | Reverse circulation sand washing well-flushing pipe column |
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| CN110821425A (en) * | 2019-12-31 | 2020-02-21 | 中国石油大学(华东) | Coal-bed gas well wall cleaning equipment and circulating well cleaning method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
| CN114941510B (en) * | 2022-06-17 | 2024-03-22 | 盘锦博瑞石油工程有限公司 | Circulating blocking-removing sand-fishing process system |
| CN115075745A (en) * | 2022-08-23 | 2022-09-20 | 东营政阳自动化科技有限公司 | Oil is safety joint in pit |
| CN115075745B (en) * | 2022-08-23 | 2022-12-16 | 大庆市奈固石油机械设备制造有限公司 | Oil is safety joint in pit |
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