CN114215487A - Sand filtering and draining device for well wall drilling - Google Patents
Sand filtering and draining device for well wall drilling Download PDFInfo
- Publication number
- CN114215487A CN114215487A CN202111555481.9A CN202111555481A CN114215487A CN 114215487 A CN114215487 A CN 114215487A CN 202111555481 A CN202111555481 A CN 202111555481A CN 114215487 A CN114215487 A CN 114215487A
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- CN
- China
- Prior art keywords
- filtering
- sand
- filter
- cavity
- wall
- Prior art date
- 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.)
- Granted
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 55
- 239000004576 sand Substances 0.000 title claims abstract description 49
- 238000005553 drilling Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 239000002184 metal Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 238000004062 sedimentation 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
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
-
- 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
-
- 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a sand filtering and draining device for well wall drilling, which comprises a filtering cap, wherein a primary filtering cavity and a secondary filtering cavity which are communicated with each other are arranged in the filtering cap, a primary filtering layer is arranged in the primary filtering cavity, one end of the primary filtering layer is communicated with the secondary filtering cavity, the other end of the primary filtering layer is connected with a guide pipe, a hollow rubber plug is sleeved on the outer wall of the guide pipe, and a secondary filtering layer is arranged in the secondary filtering cavity. According to the invention, the primary filter cavity and the secondary filter cavity are arranged in the filter cap to filter water and sand twice, so that the sand blocking precision can be effectively improved, the sand loss is reduced, the well wall is kept stable, the grouting hole sealing difficulty is further reduced, the grouting hole sealing quality is improved, meanwhile, the hollow rubber plug is arranged on the outer wall of the conduit, the conduit can be assisted and fixed, the hollow rubber plug has the elastic characteristic, and is abutted against the inner wall of the well wall drill hole after being plugged into the well wall drill hole, so that the water and sand can be effectively prevented from leaking from a gap between the well wall drill hole and the filter cap.
Description
Technical Field
The invention relates to the technical field of coal mine construction, in particular to a sand filtering and draining device for borehole wall drilling.
Background
During the construction and production process of the mine, water and sand flow into the mine through the weak area of the well wall, and when the water and sand flow quantity of the mine is too large, water damage of the mine can be caused. The construction of drilling on the well wall is a common measure for water damage control of complex mines, and pressure relief is carried out by drilling on the well wall. However, when the mine is in the water-rich rock-soil layer, a large amount of underground water is gushed out from the drilling holes of the well wall due to the reasons of large water content, high water pressure, loose rock-soil layer and the like of the water-rich rock-soil layer, and a large amount of silt is carried into the shaft of the mine through the drilling holes, once the sand output amount is too large, the shaft is easy to cause secondary disasters due to the sedimentation of the peripheral earth surface, water inrush accidents are generated, the well wall is broken in a large area, and accidents such as well flooding, sand bursting and the like are caused. Such accidents cause severe underground production environment of the mine, and seriously directly harm the life safety of underground workers and cause national property loss. Meanwhile, the long-term sand leakage and water leakage of the well wall can also increase the underground sand and water discharging cost and increase the production cost of the mine.
The borehole wall drilling is sealed through grouting, but the effect of direct grouting hole sealing after drilling generally can not reach the design requirement, the hole sealing quality is poor, the durability is not strong, and a water and sand circulation channel is easy to form. Therefore, a device capable of filtering sand and draining water after drilling a hole in a well wall of a mine is needed, loss of large-particle sand after drilling the hole in the well wall is reduced, and then grouting hole sealing is carried out. However, the number of sand filtering and water draining devices currently applied to coal mines is small, and most of the sand filtering devices and the sand filtering and water draining devices are applied to oil well engineering and tunnel engineering. The existing metal mesh cloth type sand filtering pipe is generally a metal pipe with water drainage holes on the inner layer and the outer layer, and a sand filtering device filled with a water filtering net is adopted between the metal pipes, but the existing metal mesh cloth type sand filtering pipe generally has the problems of longer length, high cost, poor sand filtering and drainage effects and the like.
Therefore, how to provide a sand filtering and draining device for borehole wall drilling, which has simple structure, small volume and good sand filtering and draining effects, is one of the technical problems to be solved urgently in the field.
Disclosure of Invention
In view of the above, the present invention provides a sand filtering and draining device for borehole wall drilling, which aims to solve the above-mentioned disadvantages.
In order to solve the technical problems, the invention adopts the following technical scheme:
a sand filtering and draining device for borehole wall drilling, comprising: a filter cap; a primary filter cavity and a secondary filter cavity which are communicated with each other are arranged in the filter cap; a primary filter layer is arranged at one end of the primary filter cavity close to the secondary filter cavity, and the other end of the primary filter cavity is connected with a guide pipe; a hollow rubber plug is sleeved on the outer wall of the guide pipe; and a secondary filtering layer is arranged in the secondary filtering cavity.
The beneficial effect of this technical scheme is: through set up one-level filtering chamber and second grade filtering chamber in straining the cap, carry out twice filtration to the sand and water that gushes into in straining the cap from the wall of a well drilling, can effectively improve the drainage effect of straining the sand, thereby effectively reduce the sand and run off, make the wall of a well remain stable, and then reduce the slip casting hole sealing degree of difficulty, improve slip casting hole sealing quality, reduce the mine and arrange husky cost, simultaneously through setting up hollow rubber buffer on the pipe outer wall, not only can play the fixed action to the pipe, and utilize hollow rubber buffer to have elastic characteristic, make it fill in the wall of a well drilling back and wall of a well drilling inner wall butt together, can effectively avoid the sand and water to spill the space between wall of a well drilling and the straining the cap, improve the drainage effect of straining the sand.
Preferably, the outer walls of the filter cap and the hollow rubber plug are both provided with rubber sealing rings.
The beneficial effect of this technical scheme is: through setting up rubber seal, can further prevent that sand from taking place the side leakage from taking place, improve the leakproofness between device and the wall of a well hole.
Preferably, the conduit and the primary filter cavity are connected through threads.
Preferably, the first-stage filter layer and the second-stage filter layer are both composed of an inner filter screen and an outer filter screen.
The beneficial effect of this technical scheme is: through setting up double-deck filter screen structure with one-level filter layer and second grade filter layer, can further improve filtering accuracy to furthest avoids the sand to run off.
Preferably, the conduit is a seamless steel tube.
Compared with the prior art, the invention has the following technical effects: the invention can effectively improve the drainage effect of the filtering sand by arranging the primary filtering cavity and the secondary filtering cavity in the filtering cap to filter the water sand which flows into the filtering cap from the borehole wall for two times, thereby effectively reducing the sand loss, keeping the borehole wall stable, further reducing the difficulty of grouting and sealing, improving the quality of grouting and sealing, reducing the sand discharging cost of the mine, meanwhile, the hollow rubber plug is arranged on the outer wall of the conduit, not only can play a role of fixing the conduit, but also can effectively prevent the water sand from leaking out from the gap between the borehole wall and the filtering cap by utilizing the elastic characteristic of the hollow rubber plug, and the hollow rubber plug is butted with the inner wall of the borehole wall after being plugged into the borehole wall, thereby improving the drainage effect of the filtering sand, and further improving the filtering precision by arranging the double-layer filtering net structure on the primary filtering layer and the secondary filtering layer, thereby furthest avoiding the sand loss, whole device simple structure, the simple operation, small keeps off husky precision height.
Drawings
FIG. 1 is an isometric view of a sand filtration and drainage device for borehole walls according to the present invention;
FIG. 2 is a cross-sectional view of a sand filtering and draining device for borehole wall drilling according to the present invention;
in the figure: 1. a filter cap; 2. a primary filter chamber; 3. a secondary filter chamber; 4. a first-stage filter layer; 5. a conduit; 6. a hollow rubber plug; 7. a secondary filter layer; 8. a rubber seal ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-2, the invention discloses a sand filtering and draining device for borehole wall drilling, which comprises: a filter cap 1; a primary filter cavity 2 and a secondary filter cavity 3 which are communicated with each other are arranged in the filter cap 1; a primary filter layer 4 is arranged at one end of the primary filter cavity 2 close to the secondary filter cavity 3, and the other end of the primary filter cavity is connected with a conduit 5; a hollow rubber plug 6 is sleeved on the outer wall of the guide pipe 5; a secondary filter layer 7 is arranged in the secondary filter cavity 3.
In this embodiment, the outer walls of the filter cap 1 and the hollow rubber plug 6 are provided with 2 rubber sealing rings 8.
In the embodiment, the conduit 5 is connected with the primary filter cavity 2 through threads; a first external thread is arranged on the outer wall of one end of the conduit 5 close to the primary filter layer 4; correspondingly, the inner wall of the primary filter cavity 2 is provided with a first internal thread matched with the first external thread.
In the embodiment, the first-stage filter layer 4 and the second-stage filter layer 7 are both composed of an inner filter screen and an outer filter screen; the aperture of the inner filter screen is 400 meshes, and the aperture of the outer filter screen is 40 meshes.
In the present embodiment, the guide pipe 5 is a seamless steel pipe.
In this embodiment, the end surface of the hollow rubber plug 6 and the end surface of the filter cap 1 are mutually attached and bonded together by glue.
In this embodiment, the outer wall of the end of the filter cap 1 away from the guide pipe 5 is provided with a second external thread for connecting with a grouting pipe, so as to facilitate grouting of a drilled hole.
In other embodiments, the specific structure of the primary filter layer 4 and the secondary filter layer 7 can be designed according to actual requirements.
In other embodiments, the aperture of the filter screen can be designed according to actual requirements.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. A sand filtering and draining device for borehole wall drilling is characterized by comprising: a filter cap (1); a primary filter cavity (2) and a secondary filter cavity (3) which are communicated with each other are arranged in the filter cap (1); a primary filter layer (4) is arranged at one end of the primary filter cavity (2) close to the secondary filter cavity (3), and the other end of the primary filter cavity is connected with a conduit (5); a hollow rubber plug (6) is sleeved on the outer wall of the guide pipe (5); and a secondary filtering layer (7) is arranged in the secondary filtering cavity (3).
2. The sand filtering and draining device for borehole wall drilling according to claim 1, characterized in that the outer walls of the filtering cap (1) and the hollow rubber plug (6) are provided with rubber sealing rings (8).
3. The sand filtering and draining device for borehole wall drilling according to claim 1, characterized in that the conduit (5) and the primary filter chamber (2) are connected by screw thread.
4. The sand filtering and water draining device for borehole wall drilling according to claim 1, characterized in that the primary filter layer (4) and the secondary filter layer (7) are both composed of an inner filter screen and an outer filter screen.
5. The sand filtering and draining device for borehole wall drilling according to claim 1, characterized in that the conduit (5) is seamless steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111555481.9A CN114215487B (en) | 2021-12-17 | 2021-12-17 | Sand filtering and draining device for borehole wall drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111555481.9A CN114215487B (en) | 2021-12-17 | 2021-12-17 | Sand filtering and draining device for borehole wall drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114215487A true CN114215487A (en) | 2022-03-22 |
| CN114215487B CN114215487B (en) | 2024-01-12 |
Family
ID=80703905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111555481.9A Active CN114215487B (en) | 2021-12-17 | 2021-12-17 | Sand filtering and draining device for borehole wall drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114215487B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5921696A (en) * | 1993-10-04 | 1996-12-11 | Baker Hughes Incorporated | Method and apparatus for sealing and transferring force in a wellbore |
| FR2791733A1 (en) * | 1999-03-31 | 2000-10-06 | Schlumberger Cie Dowell | METHOD AND DEVICE FOR COMPLETING WELLS FOR THE PRODUCTION OF HYDROCARBONS OR THE LIKE |
| CN202500607U (en) * | 2012-03-29 | 2012-10-24 | 景成虎 | Device for drilling and draining towards holes under coal layer |
| CN103924610A (en) * | 2014-04-30 | 2014-07-16 | 国家电网公司 | Weep hole structure and method capable of avoiding blocking |
| CN104389634A (en) * | 2014-09-16 | 2015-03-04 | 中国矿业大学 | Mine vertical shaft/sieve shaft well wall structure and controllable dewatering method thereof |
| CN207080210U (en) * | 2017-06-20 | 2018-03-09 | 中国石油天然气股份有限公司 | Nozzle assembly and have its flowing well device |
| CN207813528U (en) * | 2018-01-25 | 2018-09-04 | 山西华晋吉宁煤业有限责任公司 | A kind of firedamp taking-out discharging drilling construction three-level dregs filter |
| CN208959407U (en) * | 2018-09-29 | 2019-06-11 | 灵宝金源矿业股份有限公司 | A kind of mine down-hole draws water filter device |
| CN209752313U (en) * | 2019-03-12 | 2019-12-10 | 中国市政工程西北设计研究院有限公司 | Municipal administration sewage pretreatment device |
| CN112982460A (en) * | 2021-04-12 | 2021-06-18 | 厦门理工学院 | Civil engineering drainage filter equipment |
| CN214680395U (en) * | 2021-02-25 | 2021-11-12 | 黑龙江省况才科技有限公司 | Offshore gas field produced liquid sand filtering device |
| CN214741217U (en) * | 2021-03-16 | 2021-11-16 | 中国矿业大学 | Water drill drilling cutting hole sealing device convenient for water chip mixture drainage |
-
2021
- 2021-12-17 CN CN202111555481.9A patent/CN114215487B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5921696A (en) * | 1993-10-04 | 1996-12-11 | Baker Hughes Incorporated | Method and apparatus for sealing and transferring force in a wellbore |
| FR2791733A1 (en) * | 1999-03-31 | 2000-10-06 | Schlumberger Cie Dowell | METHOD AND DEVICE FOR COMPLETING WELLS FOR THE PRODUCTION OF HYDROCARBONS OR THE LIKE |
| CN202500607U (en) * | 2012-03-29 | 2012-10-24 | 景成虎 | Device for drilling and draining towards holes under coal layer |
| CN103924610A (en) * | 2014-04-30 | 2014-07-16 | 国家电网公司 | Weep hole structure and method capable of avoiding blocking |
| CN104389634A (en) * | 2014-09-16 | 2015-03-04 | 中国矿业大学 | Mine vertical shaft/sieve shaft well wall structure and controllable dewatering method thereof |
| CN207080210U (en) * | 2017-06-20 | 2018-03-09 | 中国石油天然气股份有限公司 | Nozzle assembly and have its flowing well device |
| CN207813528U (en) * | 2018-01-25 | 2018-09-04 | 山西华晋吉宁煤业有限责任公司 | A kind of firedamp taking-out discharging drilling construction three-level dregs filter |
| CN208959407U (en) * | 2018-09-29 | 2019-06-11 | 灵宝金源矿业股份有限公司 | A kind of mine down-hole draws water filter device |
| CN209752313U (en) * | 2019-03-12 | 2019-12-10 | 中国市政工程西北设计研究院有限公司 | Municipal administration sewage pretreatment device |
| CN214680395U (en) * | 2021-02-25 | 2021-11-12 | 黑龙江省况才科技有限公司 | Offshore gas field produced liquid sand filtering device |
| CN214741217U (en) * | 2021-03-16 | 2021-11-16 | 中国矿业大学 | Water drill drilling cutting hole sealing device convenient for water chip mixture drainage |
| CN112982460A (en) * | 2021-04-12 | 2021-06-18 | 厦门理工学院 | Civil engineering drainage filter equipment |
Non-Patent Citations (1)
| Title |
|---|
| 赵启静,张宜法,李方名: "何岗煤矿主井井筒冻结段双层井壁夹缝注浆封水技术措施", 山东煤炭科技, no. 06 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114215487B (en) | 2024-01-12 |
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