CN114961628A - Beaded flexible plugging device for special drilling of coal mine and use method - Google Patents
Beaded flexible plugging device for special drilling of coal mine and use method Download PDFInfo
- Publication number
- CN114961628A CN114961628A CN202210641900.9A CN202210641900A CN114961628A CN 114961628 A CN114961628 A CN 114961628A CN 202210641900 A CN202210641900 A CN 202210641900A CN 114961628 A CN114961628 A CN 114961628A
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- bag
- hole
- plugging device
- water injection
- flexible
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- 238000005553 drilling Methods 0.000 title claims abstract description 45
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims description 10
- 239000002775 capsule Substances 0.000 claims description 4
- 238000010408 sweeping Methods 0.000 claims description 4
- 239000010985 leather Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 241001146209 Curio rowleyanus Species 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003566 sealing material Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 fire Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
- E21B33/1243—Units with longitudinally-spaced plugs for isolating the intermediate space with inflatable sleeves
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- 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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention belongs to the technical field of coal mine underground production, and particularly relates to a beaded flexible plugging device for a special drilling hole of a coal mine and a using method thereof, which comprises at least two telescopic bags arranged in the drilling hole from bottom to top, wherein the telescopic bags at least comprise two bag-shaped bags arranged in the drilling hole from bottom to top, the upper surface of each bag is provided with a connector connected with an external water injection pipe, and each external water injection pipe is provided with an orifice three-way valve and a pressure gauge for controlling the opening and closing of water flow; the bead-shaped flexible plugging device is composed of external water injection pipes and a bag arranged from bottom to top. The invention has scientific principle, compact structure and simple operation, can quickly realize the special plugging and unsealing operation requirements of the drill hole, can be repeatedly used, not only improves the plugging and unsealing working efficiency of the drill hole, but also saves hole sealing materials and provides support for various types of special drill holes.
Description
Technical Field
The invention belongs to the technical field of underground production of coal mines, and particularly relates to a beaded flexible plugging device for a special drilling hole of a coal mine and a using method thereof.
Background
The underground coal mine needs to be constructed with well lane engineering, mining engineering, disaster control engineering and the like, most of the engineering comprises drilling holes, such as geological exploration drilling holes, water exploration and drainage drilling holes, fire prevention and extinguishing grouting drilling holes, coal rock wall deformation observation drilling holes, gas extraction drilling holes, shaft observation drilling holes and the like, and due to the fact that the underground coal mine conditions are special, the coal mine is exposed to disaster prevention and control needs of water, fire, gas, spontaneous combustion of coal beds and the like, part of the drilling holes need to be temporarily plugged, or special conditions such as fire prevention and extinguishing observation holes, coal rock deformation observation holes, special drainage holes and the like exist after plugging. The common drilling hole plugging method is that cement mortar or a chemical expanding agent is injected by using a grouting pump for plugging, and even if the cement added with an accelerator is still required to be cured for 24 hours, the chemical expanding agent is expensive and is still required to be cured for 6-8 hours; the unsealing method comprises the steps of drilling and crushing the blocked cement mortar or chemical expanding agent, and cleaning the blocked cement mortar or chemical expanding agent; if the plugging is needed again, cement mortar or a chemical expanding agent needs to be injected by a grouting pump for plugging, the plugging and unsealing operation method wastes plugging materials, wastes time and labor, and simultaneously, the hole diameter of a drilled hole is larger and larger, the hole wall is softer and softer, and the plugging difficulty is more and more complicated.
For the special drilling holes, a drilling hole plugging device and a method for plugging and unsealing quickly and repeatedly do not exist at present, so that the drilling hole plugging device and the method for plugging and unsealing quickly and efficiently are required to be developed, the drilling holes are plugged and unsealed quickly and efficiently and are repeatedly operated and used, materials are saved, the plugging effect is improved, the reliability is improved, and support is provided for various drilling projects under a coal mine.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a beaded flexible plugging device for a special drilling hole of a coal mine and a using method thereof, and mainly designs a device and a method for quickly plugging and unsealing the drilling hole and repeatedly operating and using the device and the method aiming at the drilling hole with special purposes such as temporary plugging or repeated plugging and unsealing.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
a bead-string-shaped flexible plugging device for a special drilling hole of a coal mine comprises at least two telescopic bag bags arranged in the drilling hole from bottom to top, wherein the telescopic bag bags at least comprise two bag bags arranged in the drilling hole from bottom to top, the upper surface of each bag is provided with a connector connected with an external water injection pipe, and each external water injection pipe is provided with an orifice three-way valve and a pressure gauge for controlling the opening and closing of water flow; the bead-shaped flexible plugging device is composed of external water injection pipes and a bag arranged from bottom to top.
The flexible bag is one or more of an expandable capsule, plastic or a leather bag.
The flexible bladder has a width no less than three times the diameter of the borehole.
A method for using a beaded flexible plugging device for special drilling of a coal mine,
a) the hole sweeping operation is carried out on the hole wall) (5) of the drill hole (13) needing hole sealing, so that the hole wall is smooth and flat;
b) feeding all retractable capsules of the beaded flexible occluder from bottom to top according to a preset depth;
c) adopt respective external water injection pipe to carry out the water injection to each scalability bag, treat that scalability bag inflation back will bore a hole and seal, adopt the valve to close the external water injection pipe that corresponds according to the reading of three-way valve and manometer.
In the step c), underground normal pressure water or a water pump pumping water source is used as a water source externally connected with a water injection pipe.
d) And sequentially releasing the pressure of the beaded flexible plugging device group from outside to inside, withdrawing the beaded flexible plugging device and completing the operation of opening the seal of the drill hole.
The invention has the beneficial effects that:
the invention has scientific principle, compact structure and simple operation, and when in use, the flexible plugging device only needs to be sent to a preset position of a drill hole, and the flexible bags are expanded one by one under pressure from inside to outside in sequence to realize integral hole sealing; when the drill hole is unsealed, pressure is released and the pressure of the flexible plugging device is released from outside to inside in sequence, so that the special plugging and unsealing operation requirements of the drill hole are quickly met, the flexible plugging device can be used repeatedly, the plugging and unsealing work efficiency of the drill hole is improved, the hole sealing material is saved, and support is provided for various types of special drill holes.
Drawings
FIG. 1 is a sectional view of the entire construction.
FIG. 2 is a schematic sectional view taken along line A-A.
Reference numerals: the device comprises an orifice three-way valve, a pressure gauge 1, an inner section injection pipe 2, a middle section injection pipe 3, an outer section injection pipe 4, a drilling hole wall 5, an outer section telescopic bag 6, an outer section water outlet 7, a middle section telescopic bag 8, a middle section water outlet 9, an inner section water outlet 10, an end section telescopic bag 11, an end section water outlet 12, a drilling hole 13 and an inner section telescopic bag 14.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
example (b): see fig. 1-2.
The invention discloses a beaded flexible plugging device for a special drilling hole of a coal mine, which comprises at least two telescopic bags arranged in a drilling hole 13 from bottom to top, wherein the four bags comprise four bags which are respectively defined as an end telescopic bag 11, an inner telescopic bag 14, a middle telescopic bag 8 and an outer telescopic bag 6 from bottom to top, the upper surface of each bag is provided with a connector connected with an external water injection pipe, and each external water injection pipe is provided with an orifice three-way valve and a pressure gauge 1 for controlling the opening and closing of water flow; as shown in figure 1, each external water injection pipe extends into the inner part from the upper surface of each sac, a tail water outlet 12 is reserved in a tail telescopic sac 11, an inner water outlet 10 is reserved in an inner telescopic sac 14, an intermediate water outlet 9 is reserved in an intermediate telescopic sac 8, and an outer water outlet 7 is reserved in an outer telescopic sac 6.
As shown in figure 1, four bags and water injection pipes are connected externally to the bags to form a bead-shaped flexible stopper.
The telescopic bags contained in the external water injection pipes and the beaded flexible occluder are subjected to high-pressure air tightness and strength treatment to meet the requirements; the tolerance pressure of the flexible bag is not less than 2MPa, the width of the single plugging flexible bag is not less than 3 times of the diameter of the drilled hole, and the expanded flexible bag is completely combined with the wall of the drilled hole and has reliable air tightness.
The telescopic bag is one or more of an expandable capsule, plastic or a leather bag.
The application method of the beaded flexible plugging device for the special drilling hole of the coal mine disclosed by the embodiment comprises the following steps:
a) the hole wall 5 of the drill hole 13 needing hole sealing is subjected to hole sweeping operation, so that the hole wall is smooth and flat; hole sweeping, namely when hole wall collapse and excessive drilling powder occur in the drilled hole or a drilling tool cannot fall to the originally drilled hole depth due to irregular hole walls, trimming the hole walls by using the drilling tool at a slower rotating speed and removing silted matters in the holes by using a flushing fluid in a matching way;
b) the flexible plugging device is fed into an end telescopic bag 11, an inner telescopic bag 14, a middle telescopic bag 8 and an outer telescopic bag 6 of the beaded flexible plugging device from bottom to top according to a preset depth, so that the beaded flexible plugging device is gentle and can not be blocked in a drilling hole; in this embodiment, the method can be decomposed into the following steps:
c) the underground normal pressure water or the water pump pumping water source is used as the water source of the external water injection pipe, the telescopic bags are filled with water through the respective external water injection pipe, the drill hole is sealed after the telescopic bags expand, and the corresponding external water injection pipe is closed through the valve according to the three-way valve and the reading of the pressure gauge 1. The connection of each bag and the injection pipeline is reliable, the joint is processed by high-pressure air tightness and strength, the requirement is met, and the flexible bag is completely combined with the wall of the drilled hole after being expanded, so that the air tightness is reliable.
In this embodiment, the method can be decomposed into the following steps:
c1. injecting 1MPa of underground normal-pressure water into a flexible bag 11 at the tail end of the beaded flexible stopper and a flexible bag 14 at the inner section of the stopper through an injection pipe 2 at the inner section of the stopper and a water outlet 12 at the tail end of a water outlet 10 at the inner section of the stopper at a flow rate of 30L/min respectively to bear pressure, closing a corresponding orifice valve 1, and expanding and sealing the flexible bag 11 at the tail end and the flexible bag 14 at the inner section of the stopper;
c2. injecting underground normal pressure water into the telescopic bag 8 at the middle section of the beaded flexible plugging device through the middle section water outlet 9 by the middle section injection pipe 3 at the flow rate of 30L/min so as to bear pressure, closing the corresponding orifice valve 1 and realizing the expansion and hole sealing of the telescopic bag at the middle section;
c3. injecting underground normal-pressure water into the telescopic bag 6 at the outer section of the beaded flexible stopper through the outer-section injection pipe 4 and the outer-section water outlet 7 at the flow rate of 30L/min to bear pressure, closing the corresponding orifice valve 1 and realizing the expansion sealing of the telescopic bag at the outer section;
according to the special drilling and sealing requirements, performing sealing observation on each part of the beaded flexible plugging device to complete drilling and sealing operation;
d) and (4) carrying out pressure relief and release on the beaded flexible plugging device group from outside to inside in sequence, withdrawing the beaded flexible plugging device, and completing the operation of opening the drilled hole.
The method for relieving pressure comprises the following steps: the pressure relief pipeline can be additionally arranged, if the pressure relief pipeline can refer to each water injection pipeline, the pressure relief pipeline extends into each telescopic bag from outside to inside 8, a single pressure relief pipe can be adopted, a pressure relief water port is arranged in each bag, a pressure relief valve is arranged at the position of an external pipe port, the pressure relief valve is closed in the water injection stage, the pressure relief valve is opened in the pressure relief stage, water in each bag is discharged from the pressure relief pipe, and the bags can be directly withdrawn from the drill hole in sequence after being contracted. The pressure relief tubes may also be provided individually for each bladder, with their respective pressure relief ports located in their respective bladders, or with both bladders sharing a single pressure relief tube.
e) And repeating the steps b) -d) according to the special requirements of drilling, and realizing the circulating operation of drilling plugging and unsealing again.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (6)
1. The utility model provides a flexible plugging device of special drilling string of beads form in colliery which characterized in that: the water injection bag comprises at least two telescopic bag bags arranged in a drill hole (13) from bottom to top, wherein the telescopic bag bags at least comprise two bag bags arranged in the drill hole from bottom to top, the upper surface of each bag is provided with a connector connected with an external water injection pipe, and each external water injection pipe is provided with an orifice three-way valve and a pressure gauge (1) for controlling the opening and closing of water flow; the bead-shaped flexible plugging device is composed of external water injection pipes and a bag arranged from bottom to top.
2. The beaded flexible plugging device for the special drilling holes in the coal mines, as claimed in claim 1, wherein: the flexible bag is one or more of an expandable capsule, plastic or a leather bag.
3. The beaded flexible plugging device for the special drilling holes in the coal mines, as claimed in claim 1, wherein: the flexible bladder has a width no less than three times the diameter of the bore (13).
4. The use method of the beaded flexible plugging device for the special drilling holes in the coal mines, which is characterized in that:
a) the hole sweeping operation is carried out on the hole wall) (5) of the drill hole (13) needing hole sealing, so that the hole wall is smooth and flat;
b) feeding all telescopic bag of the bead-shaped flexible plugging device from bottom to top according to the preset depth;
c) adopt respective external water injection pipe to carry out the water injection to each scalability bag, treat that scalability bag inflation back will bore a hole and seal, adopt the valve to close the external water injection pipe that corresponds according to the reading of three-way valve and manometer (1).
5. Use according to claim 4, characterized in that: in the step c), underground normal pressure water or a water pump pumping water source is used as a water source externally connected with a water injection pipe.
6. Use according to claim 4, wherein the drill hole unsealing is carried out by the steps of:
d) and (4) carrying out pressure relief and release on the beaded flexible plugging device group from outside to inside in sequence, withdrawing the beaded flexible plugging device, and completing the operation of opening the drilled hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641900.9A CN114961628A (en) | 2022-06-08 | 2022-06-08 | Beaded flexible plugging device for special drilling of coal mine and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641900.9A CN114961628A (en) | 2022-06-08 | 2022-06-08 | Beaded flexible plugging device for special drilling of coal mine and use method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114961628A true CN114961628A (en) | 2022-08-30 |
Family
ID=82971617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210641900.9A Pending CN114961628A (en) | 2022-06-08 | 2022-06-08 | Beaded flexible plugging device for special drilling of coal mine and use method |
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| Country | Link |
|---|---|
| CN (1) | CN114961628A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203808918U (en) * | 2014-03-12 | 2014-09-03 | 兰德伟业科技集团有限公司 | Inflatable oil well plugging device |
| CN204532411U (en) * | 2015-02-17 | 2015-08-05 | 冀中能源峰峰集团有限公司 | A kind of extension type flushing type gas drainage hole-sealing device |
| CN206625817U (en) * | 2017-03-20 | 2017-11-10 | 山东科技大学 | A kind of gas hole packer |
| US20200080382A1 (en) * | 2018-04-12 | 2020-03-12 | Shandong University Of Science And Technology | Drill-power-based directional hydraulic fracturing system for downhole quick slotting and method thereof |
| CN212130542U (en) * | 2020-05-13 | 2020-12-11 | 中国矿业大学 | Non-setting constant-pressure slurry bag hole sealing system for gas extraction drill hole |
| CN113236342A (en) * | 2021-06-02 | 2021-08-10 | 山东科技大学 | Gas extraction device and method capable of repeatedly and circularly utilizing multi-angle bag |
-
2022
- 2022-06-08 CN CN202210641900.9A patent/CN114961628A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203808918U (en) * | 2014-03-12 | 2014-09-03 | 兰德伟业科技集团有限公司 | Inflatable oil well plugging device |
| CN204532411U (en) * | 2015-02-17 | 2015-08-05 | 冀中能源峰峰集团有限公司 | A kind of extension type flushing type gas drainage hole-sealing device |
| CN206625817U (en) * | 2017-03-20 | 2017-11-10 | 山东科技大学 | A kind of gas hole packer |
| US20200080382A1 (en) * | 2018-04-12 | 2020-03-12 | Shandong University Of Science And Technology | Drill-power-based directional hydraulic fracturing system for downhole quick slotting and method thereof |
| CN212130542U (en) * | 2020-05-13 | 2020-12-11 | 中国矿业大学 | Non-setting constant-pressure slurry bag hole sealing system for gas extraction drill hole |
| CN113236342A (en) * | 2021-06-02 | 2021-08-10 | 山东科技大学 | Gas extraction device and method capable of repeatedly and circularly utilizing multi-angle bag |
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