CN113279710A - Deep well sand removal system - Google Patents
Deep well sand removal system Download PDFInfo
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- CN113279710A CN113279710A CN202110641701.3A CN202110641701A CN113279710A CN 113279710 A CN113279710 A CN 113279710A CN 202110641701 A CN202110641701 A CN 202110641701A CN 113279710 A CN113279710 A CN 113279710A
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- pipe
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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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
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Cleaning In General (AREA)
Abstract
本发明涉及一种深井清砂系统，包括清砂自封封隔器，所述清砂自封封隔器包括桥式接头、桥式外管和桥式内管，在所述的桥式内管的底端通过管螺纹连接有多个依次串联的内油管，在护腕下接头的底端通过管螺纹连接有多个依次串联的外油管；外油管的底端连接有密封延长管，密封延长管包括延长外管和延长内管，密封延长管的底端连接有吸砂器，吸砂器包括外筒，外筒的内部设有与所述延长内管相互插接的扩散管，外筒的顶端通过螺纹与延长外管连接，外筒的底端口内固定有下接头，下接头的顶端口内固定有与扩散管连接的桥式筒。本发明的深井清砂系统结构设计合理，利用高速流产生低压把井底沉砂吸入内油管内，并自动举升至地面，操作方便。
The invention relates to a deep well sand cleaning system, comprising a sand cleaning self-sealing packer, wherein the sand cleaning self-sealing packer comprises a bridge joint, a bridge outer pipe and a bridge inner pipe. The bottom end is connected with a plurality of inner oil pipes in series through pipe threads, and the bottom end of the lower joint of the wrist is connected with a plurality of outer oil pipes in series through pipe threads; the bottom end of the outer oil pipe is connected with a sealing extension pipe, and the sealing extension pipe It includes an extension outer tube and an extension inner tube. The bottom end of the sealing extension tube is connected with a sand suction device. The sand suction device includes an outer cylinder. The top end is connected with the extension outer pipe through threads, the bottom port of the outer cylinder is fixed with a lower joint, and the top port of the lower joint is fixed with a bridge type cylinder connected with the diffusion pipe. The deep well sand cleaning system of the invention has a reasonable structure design, utilizes high-speed flow to generate low pressure to suck the bottom-hole sand into the inner oil pipe, and automatically lifts it to the ground, and is convenient to operate.
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 pipe sand washing is not suitable for deep wells because of too large friction resistance of the pipe column. 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, which utilizes high-speed flow to generate low pressure to lift the settled sand at the bottom of a well to the ground.
The deep well sand cleaning system comprises a sand cleaning self-sealing packer, wherein the sand cleaning self-sealing packer comprises a bridge type joint, a bridge type outer pipe and a bridge type inner pipe, the bridge type joint is in threaded connection with the bridge type outer pipe, the bridge type inner pipe is in threaded connection with the bridge type joint, and an oil well self-sealing device fixed through a lower joint of a protective bowl is arranged on the outer wall of the bridge type outer pipe; the bottom end of the bridge-type inner pipe is connected with a plurality of inner oil pipes which are sequentially connected in series through pipe threads, and the bottom end of the wrist guard lower joint is connected with a plurality of outer oil pipes which are sequentially connected in series through pipe threads; the bottom of outer oil pipe is connected with sealed extension pipe, and sealed extension pipe is connected with outer oil pipe including extension outer tube and extension inner tube, extension outer tube, interior oil pipe's bottom is inserted and is established inside the extension inner tube, and the bottom of sealed extension pipe is connected with inhales the sand ware, inhales the sand ware and includes the urceolus, the inside of urceolus be equipped with the diffusion tube of the mutual grafting of extension inner tube, the top of urceolus is passed through screw thread and extension outer union coupling, and the bottom mouth internal fixation of urceolus has the lower clutch, and the top mouth internal fixation of lower clutch has the bridge formula section of thick bamboo of being connected with the diffusion tube.
In the structure, the outer wall of the bridge type joint is provided with a plurality of power liquid inlet holes.
In the structure, the oil well self-sealing device comprises a first leather cup, a protective cup and a second leather cup, the bottom end of the first leather cup is fixed through the wrist guard, the second leather cup is arranged on the outer wall of the protective cup, and the bottom end of the second leather cup is fixed through the lower joint of the wrist guard.
In the structure, a plurality of first extension pipe sealing rings are arranged on the inner wall of the top port of the extension inner pipe, and a plurality of second extension pipe sealing rings are arranged on the outer wall of the bottom port of the extension inner pipe.
In the structure, the lower joint is internally provided with the filter cavity, the pipe wall of the lower joint on one side of the filter cavity is internally provided with a sand stirring liquid outlet hole which is communicated up and down, the bottom end head of the lower joint is of a conical structure, and the outer wall of the lower joint is provided with a plurality of uniformly distributed stone-proof holes.
In the structure, the lifting nozzle is fixed in the top port of the bridge type cylinder, the liquid inlet hole is formed in the outer wall of the bridge type cylinder, the bridge type liquid suction hole which is through up and down is formed in the pipe wall of the bridge type cylinder on one side of the lifting nozzle, the top end of the bridge type liquid suction hole is communicated with the inside of the diffusion pipe, and the bottom end of the bridge type liquid suction hole is communicated with the cavity inside the top port of the lower joint.
In the above structure, a flow dividing chamber is formed between the outer wall of the diffuser pipe and the inner wall of the outer cylinder.
Compared with the prior art, the invention has the beneficial effects that: the deep well sand removal system has reasonable structural design, power fluid is sequentially injected into the shunting cavity from the outer wall of the bridge joint, and the high-speed flow is utilized to generate low pressure to suck settled sand at the well bottom into the inner oil pipe and automatically lift the settled sand to the ground, so the operation is convenient.
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 diagram of a sand-cleaning self-sealing packer in the deep well sand-cleaning system according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a sealing extension pipe in a deep well sand cleaning system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a sand sucker in a deep well sand cleaning system according to an embodiment of the present invention.
In the figure:
1. cleaning sand and self-sealing the packer; 101. a bridge joint; 102. a bridge-type outer tube; 103. a bridge inner tube; 104. a bowl protecting lower joint; 105. power fluid enters the hole; 2. an oil well self-sealer; 201. a first leather cup; 202. protecting a bowl; 203. a second leather cup; 3. an inner oil pipe; 4. an outer oil pipe; 5. sealing the extension tube; 501. extending the outer tube; 502. extending the inner tube; 503. a first extension pipe seal ring; 504. a second extension pipe sealing ring; 6. a sand sucker; 601. an outer cylinder; 602. a diffuser tube; 603. a lower joint; 604. a bridge drum; 605. a filter chamber; 606. stirring sand and discharging liquid; 607. preventing stone holes; 608. a bridge drum; 609. a liquid inlet hole; 610. a bridge type liquid suction hole; 611. a shunting cavity.
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 a sand cleaning self-sealing packer 1, wherein the sand cleaning self-sealing packer 1 comprises a bridge joint 101, a bridge outer pipe 102 and a bridge inner pipe 103, the bridge joint 101 is in threaded connection with the bridge outer pipe 102, the bridge inner pipe 103 is in threaded connection with the bridge joint 101, and an oil well self-sealing device 2 fixed through a bowl protection lower joint 104 is arranged on the outer wall of the bridge outer pipe 102; the bottom end of the bridge type inner pipe 103 is connected with a plurality of inner oil pipes 3 which are sequentially connected in series through pipe threads, and the bottom end of the wrist guard lower joint 104 is connected with a plurality of outer oil pipes 4 which are sequentially connected in series through pipe threads; outer oil pipe 4's bottom is connected with sealed extension pipe 5, and sealed extension pipe 5 is including extension outer tube 501 and extension inner tube 502, and extension outer tube 501 passes through the screw thread to be connected with outer oil pipe 4, inside oil pipe 3's bottom is inserted and is established inside extension inner tube 502, and sealed extension pipe 5's bottom is connected with inhales sand ware 6, inhales sand ware 6 and includes urceolus 601, the inside of urceolus 601 be equipped with the mutual diffuser 602 of pegging graft of extension inner tube 502, the top of urceolus 601 is passed through the screw thread and is connected with extension outer tube 501, and the bottom mouth internal fixation of urceolus 601 has lower clutch 603, and the top mouth internal fixation of lower clutch 603 has the bridge section of thick bamboo 604 of being connected with diffuser 602.
In the above structure, the outer wall of the bridge joint 101 is provided with a plurality of power liquid inlet holes 105.
In the structure, the oil well self-sealing device 2 comprises a first leather cup 201, a protective cup 202 and a second leather cup 203, the bottom end of the first leather cup 201 is fixed through the wrist guard 202, the second leather cup 203 is arranged on the outer wall of the protective cup 202, and the bottom end of the second leather cup 203 is fixed through the wrist guard lower joint 104.
In the above structure, a plurality of first extension pipe sealing rings 503 are disposed on the inner wall of the top port of the extension inner pipe 502, and a plurality of second extension pipe sealing rings 504 are disposed on the outer wall of the bottom port of the extension inner pipe 502.
In the structure, the lower joint 603 is provided with the filter cavity 605 inside, the pipe wall of the lower joint 603 on one side of the filter cavity 605 is provided with the sand stirring liquid outlet hole 606 which is communicated up and down, the bottom end of the lower joint 603 is of a conical structure, and the outer wall of the lower joint 603 is provided with a plurality of uniformly distributed stone-proof holes 607.
In the structure, a lifting nozzle 608 is fixed in the top port of the bridge cylinder 604, a liquid inlet hole 609 is formed in the outer wall of the bridge cylinder 608, a bridge liquid suction hole 610 which is vertically through is formed in the pipe wall of the bridge cylinder 604 on one side of the lifting nozzle 608, the top end of the bridge liquid suction hole 610 is communicated with the inside of the diffusion pipe 602, and the bottom end of the bridge liquid suction hole 610 is communicated with the inner cavity of the top port of the lower connector 603.
In the above structure, a flow dividing chamber 611 is formed between the outer wall of the diffuser pipe 602 and the inner wall of the outer cylinder 601.
When the deep well sand cleaning system is used specifically, the number and the length of the outer oil pipes are mainly determined according to the distance between the top boundary of an oil layer and the bottom of a well, and the sand cleaning self-sealing packer must be above the top boundary of the oil layer when sand is sucked to the bottom of the well. After the outer oil pipe is completely put into the oil well, the inner oil pipe is inserted into the outer oil pipe, the lower end of the inner oil pipe is inserted into the extension inner pipe of the sealed extension pipe, and the extension inner pipe is sealed through a first extension pipe sealing ring. The upper end of the inner oil pipe is connected with a bridge type inner pipe of the sand cleaning self-sealing packer through a pipe thread, a lower joint of a protective cup of the sand cleaning self-sealing packer is connected with the outer oil pipe through a pipe thread and then is put into an oil well, and a first leather cup and a second leather cup of the sand cleaning self-sealing packer are tightly attached to an oil well casing pipe to realize self sealing. The top end of the bridge type joint is externally connected with an oil pipe to a well head, and the well head is provided with a self-sealing well sealer. During construction operation, the power fluid inlet is externally connected with a power fluid pipeline of the pump truck, and the power fluid enters the annular cavity of the bridge type outer pipe and the bridge type inner pipe of the sand cleaning self-sealing packer through the power fluid inlet. And a part of power fluid enters a diversion cavity of the sand sucker through an annular cavity of the inner oil pipe and the outer oil pipe, and the settled sand is stirred up through a sand stirring liquid outlet hole to be fluidized. The other part of the power liquid enters the nozzle cavity of the lifting nozzle through the liquid inlet hole and is sprayed upwards to form a low-pressure area, and sand and water stirred by the sand stirring liquid outlet hole are sucked into a diffusion pipe of the sand sucker after sequentially passing through the stone-proof hole, the filter cavity and the bridge type liquid sucking hole. And then the sand and water stirred up from the sand stirring liquid outlet hole are lifted to the ground through the external oil pipe by the bridge type inner pipe, so that the deep well sand cleaning operation step is completed.
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 (7)
1. The deep well sand cleaning system is characterized by comprising a sand cleaning self-sealing packer (1), wherein the sand cleaning self-sealing packer (1) comprises a bridge type joint (101), a bridge type outer pipe (102) and a bridge type inner pipe (103), the bridge type joint (101) is in threaded connection with the bridge type outer pipe (102), the bridge type inner pipe (103) is in threaded connection with the bridge type joint (101), and an oil well self-sealing device (2) fixed through a bowl protection lower joint (104) is arranged on the outer wall of the bridge type outer pipe (102); the bottom end of the bridge type inner pipe (103) is connected with a plurality of inner oil pipes (3) which are sequentially connected in series through pipe threads, and the bottom end of the wrist guard lower joint (104) is connected with a plurality of outer oil pipes (4) which are sequentially connected in series through pipe threads; the bottom of outer oil pipe (4) is connected with sealed extension pipe (5), and sealed extension pipe (5) are including extension outer tube (501) and extension inner tube (502), and extension outer tube (501) are connected with outer oil pipe (4) through the screw thread, the bottom of interior oil pipe (3) is inserted and is established inside extension inner tube (502), and the bottom of sealed extension pipe (5) is connected with inhales sand ware (6), inhales sand ware (6) including urceolus (601), the inside of urceolus (601) be equipped with extension inner tube (502) diffusion tube (602) of pegging graft each other, the top of urceolus (601) is passed through the screw thread and is connected with extension outer tube (501), and the bottom mouth internal fixation of urceolus (601) has lower clutch (603), and the top mouth internal fixation of lower clutch (603) has bridge section of thick bamboo (604) of being connected with diffusion tube (602).
2. The deep well sand removal system according to claim 1, wherein: the outer wall of the bridge type joint (101) is provided with a plurality of power liquid inlet holes (105).
3. The deep well sand removal system according to claim 1, wherein: the oil well self-sealing device (2) comprises a first leather cup (201), a protective cup (202) and a second leather cup (203), the bottom end of the first leather cup (201) is fixed through the protective wrist (202), the second leather cup (203) is arranged on the outer wall of the protective cup (202), and the bottom end of the second leather cup (203) is fixed through the protective wrist lower joint (104).
4. The deep well sand removal system according to claim 1, wherein: the inner wall of the top port of the extension inner pipe (502) is provided with a plurality of first extension pipe sealing rings (503), and the outer wall of the bottom port of the extension inner pipe (502) is provided with a plurality of second extension pipe sealing rings (504).
5. The deep well sand removal system according to claim 1, wherein: the sand mixing and liquid discharging device is characterized in that a filter cavity (605) is arranged inside the lower joint (603), a sand mixing and liquid discharging hole (606) which is communicated up and down is formed in the pipe wall of the lower joint (603) on one side of the filter cavity (605), the bottom end of the lower joint (603) is of a conical structure, and a plurality of uniformly distributed stone preventing holes (607) are formed in the outer wall of the lower joint (603).
6. The deep well sand removal system according to claim 1, wherein: the lifting nozzle (608) is fixed in the top port of the bridge type cylinder (604), a liquid inlet hole (609) is formed in the outer wall of the bridge type cylinder (608), a bridge type liquid suction hole (610) which is through up and down is formed in the pipe wall of the bridge type cylinder (604) on one side of the lifting nozzle (608), the top end of the bridge type liquid suction hole (610) is communicated with the inside of the diffusion pipe (602), and the bottom end of the bridge type liquid suction hole (610) is communicated with an inner cavity of the top port of the lower connector (603).
7. The deep well sand removal system according to claim 1, wherein: a flow dividing cavity (611) is formed between the outer wall of the diffusion pipe (602) and the inner wall of the outer cylinder (601).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110641701.3A CN113279710B (en) | 2021-06-09 | 2021-06-09 | A deep well sand cleaning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110641701.3A CN113279710B (en) | 2021-06-09 | 2021-06-09 | A deep well sand cleaning system |
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| CN113279710A true CN113279710A (en) | 2021-08-20 |
| CN113279710B CN113279710B (en) | 2025-04-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882819A (en) * | 2021-11-02 | 2022-01-04 | 克拉玛依市恩能胜石油科技有限公司 | Deep well sand removal system |
| CN113982511A (en) * | 2021-11-04 | 2022-01-28 | 克拉玛依捷锐石油科技有限公司 | Concentric continuous pipe sand suction device |
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201354610Y (en) * | 2008-07-21 | 2009-12-02 | 新疆石油管理局采油工艺研究院 | Concentric tube jet sand cleaning device |
| CN204703809U (en) * | 2015-05-29 | 2015-10-14 | 中国石油天然气股份有限公司 | Concentric double-pipe sand washing and well washing process pipe column of water source well |
| CN204900361U (en) * | 2015-06-29 | 2015-12-23 | 克拉玛依市恩能胜石油科技有限公司 | Efflux flowing back device of decontaminating |
| CN106194112A (en) * | 2016-09-08 | 2016-12-07 | 中国海洋石油总公司 | A kind of oil well pipe cleaning sand washing integrated apparatus and pipe cleaning sand washing method |
| CN214886928U (en) * | 2021-06-09 | 2021-11-26 | 克拉玛依市恩能胜石油科技有限公司 | Deep well sand removal system |
-
2021
- 2021-06-09 CN CN202110641701.3A patent/CN113279710B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201354610Y (en) * | 2008-07-21 | 2009-12-02 | 新疆石油管理局采油工艺研究院 | Concentric tube jet sand cleaning device |
| CN204703809U (en) * | 2015-05-29 | 2015-10-14 | 中国石油天然气股份有限公司 | Concentric double-pipe sand washing and well washing process pipe column of water source well |
| CN204900361U (en) * | 2015-06-29 | 2015-12-23 | 克拉玛依市恩能胜石油科技有限公司 | Efflux flowing back device of decontaminating |
| CN106194112A (en) * | 2016-09-08 | 2016-12-07 | 中国海洋石油总公司 | A kind of oil well pipe cleaning sand washing integrated apparatus and pipe cleaning sand washing method |
| CN214886928U (en) * | 2021-06-09 | 2021-11-26 | 克拉玛依市恩能胜石油科技有限公司 | Deep well sand removal system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882819A (en) * | 2021-11-02 | 2022-01-04 | 克拉玛依市恩能胜石油科技有限公司 | Deep well sand removal system |
| CN113982511A (en) * | 2021-11-04 | 2022-01-28 | 克拉玛依捷锐石油科技有限公司 | Concentric continuous pipe sand suction device |
| 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 |
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| CN113279710B (en) | 2025-04-04 |
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