CN109488365A - One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device and method for sealing - Google Patents
One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device and method for sealing Download PDFInfo
- Publication number
- CN109488365A CN109488365A CN201811544156.0A CN201811544156A CN109488365A CN 109488365 A CN109488365 A CN 109488365A CN 201811544156 A CN201811544156 A CN 201811544156A CN 109488365 A CN109488365 A CN 109488365A
- Authority
- CN
- China
- Prior art keywords
- gas collecting
- collecting tube
- extraction borehole
- weak seam
- retaining 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.)
- Pending
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 49
- 238000007789 sealing Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 31
- 238000010168 coupling process Methods 0.000 claims abstract description 31
- 238000005859 coupling reaction Methods 0.000 claims abstract description 31
- 239000003245 coal Substances 0.000 claims abstract description 11
- 239000008187 granular material Substances 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims abstract description 3
- 238000003032 molecular docking Methods 0.000 claims description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
Abstract
The present invention relates to technical field of coal exploitation, one kind being applied to weak seam extraction borehole retaining wall preventing clogging up device, for being inserted into weak seam extraction borehole, it include anti-blocking support end applied to weak seam extraction borehole retaining wall preventing clogging up device, gas collecting tube, fetter tube coupling, releasing pipe and ventilative tarpaulin, wherein gas collecting tube, constraint tube coupling and releasing pipe successively finish up connection, the densely covered gas collection hole of the body surfaces of gas collecting tube, free terminal of the anti-blocking support faces end head plugging in gas collecting tube, the anti-blocking support end includes the guide head positioned at head, guide head is equipped with several support rods being spacedly distributed, the ventilative tarpaulin is connected to support rod and gas collecting tube tail portion, so that ventilative tarpaulin wraps up gas collecting tube, it realizes ventilative and obstructs coal slag granules object.In addition, the present invention proposes that one kind is applied to weak seam extraction borehole retaining wall method for sealing.
Description
Technical field
The present invention relates to technical field of coal exploitation, especially a kind of to be applied to the retaining wall anti-clogging of weak seam extraction borehole
Technology.
Background technique
China's condition of coal seam occurrence is complicated, and has a large amount of dangerous seam with potential, and projecting coal bed and some high methane coals
Layer is general all than relatively soft.In the high region of weak seam especially crustal stress when construction drill, be easy to appear the hole bit freezing that collapses,
The problems such as success rate is low, depth of pore forming is small, the concordant Completion of Drilling Hole depth of most mines is all at hundred meters or less.
Even if after Completion of Drilling Hole, with the propulsion of stope, stress constantly changes in coal seam, or even due to hole
The self weight of wall coal body, hole wall occur part collapse, are causing the gas collecting segment of drilling-draining device to block, reduce drilling has
The extraction time is imitated, gas drainage results are influenced.
Summary of the invention
To solve the above problems, the present invention proposes that one kind is applied to weak seam extraction borehole retaining wall preventing clogging up device and envelope
Effective extraction time of drilling can be improved for the coal seam that gas permeability is poor in hole method, guarantees effective extraction radius, improves
Extracting result.
To achieve the above object, the technical solution adopted by the present invention is that:
In first technical solution, one kind being applied to weak seam extraction borehole retaining wall preventing clogging up device, for being inserted into
It include anti-blocking support end, collection applied to weak seam extraction borehole retaining wall preventing clogging up device into weak seam extraction borehole
Tracheae, constraint tube coupling, releasing pipe and ventilative tarpaulin, wherein gas collecting tube, constraint tube coupling and releasing pipe successively finish up connection, gas collecting tube
Body surfaces gather gas collection hole, the anti-blocking free terminal of the support faces end head plugging in gas collecting tube, the anti-blocking support end
Guide head including being located at head, guide head are equipped with several support rods being spacedly distributed, and the ventilative tarpaulin is connected to support
Bar and gas collecting tube tail portion are realized ventilative and obstruct coal slag granules object so that ventilative tarpaulin wraps up gas collecting tube.
In first technical solution, preferably, the head of the constraint tube coupling inner wall is equipped with the second constraint circle, institute
It states gas collecting tube tail portion outer wall and passes through the second constraint circle and the first constraint circle equipped with the first constraint circle, the constraint tube coupling and gas collecting tube
Cooperate fixed grafting, the ventilative tarpaulin is fixed on the junction of the second constraint circle and the first constraint circle.
In first technical solution, preferably, the constraint tube coupling and releasing pipe are connected through a screw thread.
In first technical solution, preferably, releasing pipe latter end setting is bored in corresponding weak seam extraction
The port closing end position in hole.
In first technical solution, preferably, the anti-blocking support end includes end pipe close, the end pipe
The closed head for being inserted into gas collecting tube is filled in, gather ventilative hole on end pipe close surface.
In first technical solution, preferably, the releasing pipe has multiple, and multiple releasing pipes can finish up one by one
Docking.
In second technical solution, one kind being applied to weak seam extraction borehole retaining wall method for sealing, using such as taking up an official post
It is applied to weak seam extraction borehole retaining wall preventing clogging up device described in one, includes the following steps,
Ventilative tarpaulin one end is fixed on anti-blocking support end before step 1, sealing of hole；
Gas collecting tube top is inserted into anti-blocking support end by step 2, and the other end of ventilative tarpaulin is then wrapped in gas collecting tube
Tail portion；
Step 3 connects gas collecting tube with constraint tube coupling, so that ventilative tarpaulin end is fixed on gas collecting tube and fetters the company of tube coupling
Place is met, tarpaulin of breathing freely wraps up gas collecting tube gas collection hole；
After the completion of step 4, releasing pipe are placed, releasing pipe is pulled into certain distance to outside hole, pulls distance no more than anti-blocking
Support end principal length；
Step 5, using plugging material to the gap between weak seam extraction borehole aperture inner wall and extraction pipe outer wall into
Row blocks, and sealing of hole is completed.
Using the beneficial effects of the present invention are:
It should be used for weak seam extraction borehole retaining wall preventing clogging up device, structure novel to be easy to operate, use reliability
By force, low cost can effectively increase effective extraction time of drilling, improve the extracting result of drilling.Drilling can be increased effectively to take out
The time is adopted, the extracting result of drilling is improved.Meanwhile the invention is suitable for pressure measuring drill hole, especially for weak seam.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention is applied to weak seam extraction borehole retaining wall preventing clogging up device.
Fig. 2 is that the present invention is applied to anti-blocking support end structure signal in weak seam extraction borehole retaining wall preventing clogging up device
Figure.
Fig. 3 is that the present invention is applied to gas collecting tube structural schematic diagram in weak seam extraction borehole retaining wall preventing clogging up device.
Fig. 4 is that the present invention is applied to fetter tube coupling structural schematic diagram in weak seam extraction borehole retaining wall preventing clogging up device.
Fig. 5 is that the present invention is applied to weak seam extraction borehole retaining wall preventing clogging up device releasing pipe structural schematic diagram.
Appended drawing reference includes:
The anti-blocking support end 1-, the end 11- pipe close, 12- guide head, 13- support rod, 2- gas collecting tube, 21- gas collecting tube master
Body, head section in 22- gas collecting tube, 23- gas collecting tube external screw thread, 24- gas collection hole, the constraint circle of 25- first, 3- fetter tube coupling, 31- tube coupling
Main body, 32- tube coupling main body internal screw thread, the constraint circle of 33- second, 4- releasing pipe, 41- releasing pipe main body, 42- releasing pipe external screw thread,
43- releasing pipe internal screw thread, 5- breathe freely tarpaulin, the block section 6-.
Specific embodiment
The present invention is described in detail below in conjunction with attached drawing.
Embodiment 1
As Figure 1-Figure 5, the present embodiment proposes a kind of applied to weak seam extraction borehole retaining wall preventing clogging up device, uses
It include anti-blocking support end applied to weak seam extraction borehole retaining wall preventing clogging up device in being inserted into weak seam extraction borehole
First 1, gas collecting tube 2, constraint tube coupling 3, releasing pipe 4 and ventilative tarpaulin 5, wherein gas collecting tube 2, constraint tube coupling 3 and releasing pipe 4 are successively received
Tail connection, the densely covered gas collection hole 24 of the body surfaces of gas collecting tube 2, anti-blocking support end 1 block the free terminal in gas collecting tube 2, prevent
Stifled support end 1 includes the guide head 12 positioned at head, and guide head 12 is equipped with several support rods 13 being spacedly distributed, paulin of breathing freely
Cloth 5 is connected to 2 tail portion of support rod 13 and gas collecting tube, so that ventilative tarpaulin 5 wraps up gas collecting tube 2, realizes ventilative and obstructs cinder
Grain object.
The docking as shown in Figure 1, anti-blocking support end 1, gas collecting tube 2, constraint tube coupling 3 and releasing pipe 4 finish up one by one.
As shown in Fig. 2, the head of anti-blocking support end 1 is equipped with the guide head 12 of semicircular body shape, the planar ends of guide head 12
The head of connection end pipe close 11 on face, support rod 13 are connected to the arcwall of guide head 12, and ventilative tarpaulin 5 is connected to support rod
On 13.
As shown in figure 3, gas collecting tube 2 includes head section 22, gas collecting tube external screw thread 23 and first in gas collecting tube main body 21, gas collecting tube
Constraint circle 25, wherein gather gas collection hole 24 on gas collecting tube main body 21 surface, and head section 22 is used in gas collecting tube and end pipe close 11 docks,
First 25 ends of constraint circle have gas collecting tube external screw thread 23, and the first constraint circle 25 is arranged in gas collecting tube external screw thread 23 and gas collecting tube master
Crossover position between body 21.Wherein the first constraint circle 25 is annular bulge-structure.
As shown in figure 4, constraint tube coupling 3 includes the tube coupling main body 31 of tubulose, the head section inner wall of tube coupling main body 31 is equipped with second
The main body inner wall of constraint circle 33, tube coupling main body 31 is equipped with tube coupling main body internal screw thread 32.Wherein the second constraint circle 33 is the convex of annular
Play structure.
As shown in figure 5, releasing pipe 4 includes releasing pipe main body 41, the leading portion of the outer wall of releasing pipe main body 41 is equipped with releasing pipe
External screw thread 42, the tail end of 41 inner wall of releasing pipe main body are equipped with releasing pipe internal screw thread 43, and releasing pipe internal screw thread 43 and external pumping fill
Set threaded connection.
In the present embodiment, the head for fettering 3 inner wall of tube coupling is equipped with the second constraint circle 33, and 2 tail portion outer wall of gas collecting tube is equipped with
First constraint circle 25 fetters tube coupling 3 and gas collecting tube 2 by the second constraint circle 33 and the first constraint circle 25 and cooperates fixed grafting, thoroughly
Gas tarpaulin 5 is fixed on the junction of the second constraint circle 33 and the first constraint circle 25, facilitates fixed ventilation tarpaulin 5.
In the present embodiment, it fetters tube coupling 3 and releasing pipe 4 is connected through a screw thread.
The port closing end position of corresponding weak seam extraction borehole is arranged in 4 latter end of releasing pipe.Releasing pipe 4 have it is multiple,
And multiple releasing pipes 4 can finish up docking one by one.
Anti-blocking support end 1 includes end pipe close 11, the closed head for being inserted into gas collecting tube 2 of end pipe close 11, end
Gather ventilative hole on pipe close 11 surface, enhances air permeability effect.
Embodiment 2
One kind being applied to weak seam extraction borehole retaining wall method for sealing, is applied to weak seam using in embodiment 1
Extraction borehole retaining wall preventing clogging up device, includes the following steps,
Ventilative 5 one end of tarpaulin is fixed on anti-blocking support end 1 before step 1, sealing of hole；
2 top of gas collecting tube is inserted into anti-blocking support end 1 by step 2, and the other end of ventilative tarpaulin 5 is then wrapped in collection
2 tail portion of tracheae；
Step 3 connects gas collecting tube 2 and constraint tube coupling 3, and ventilative 5 end of tarpaulin is made to be fixed on gas collecting tube 2 and constraint tube coupling
3 junction, tarpaulin 5 of breathing freely wrap up 2 gas collection hole 24 of gas collecting tube；
After the completion of step 4, releasing pipe 4 are placed, releasing pipe 4 is pulled into certain distance to outside hole, pulls distance no more than anti-
Stifled support 1 principal length of end；
Step 5, using plugging material to the gap between 4 outer wall of weak seam extraction borehole aperture inner wall and releasing pipe into
Row blocks, and forms block section 6, and sealing of hole is completed.
In the present embodiment, ventilative tarpaulin 5 is fixed on the second constraint circle 33 and the first constraint 25 cooperation positions of circle.
It should be used for weak seam extraction borehole retaining wall preventing clogging up device and method for sealing, structure novel is easy to operate,
Use reliability is strong, low cost, can effectively increase effective extraction time of drilling, improve the extracting result of drilling.It can increase
It drills effective extraction time, improves the extracting result of drilling.Meanwhile the invention is suitable for pressure measuring drill hole, especially for soft
Coal seam.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, in specific embodiments and applications can be with many changes may be made, as long as these variations are without departing from structure of the invention
Think, all belongs to the scope of protection of the present invention.
Claims (7)
1. one kind is applied to weak seam extraction borehole retaining wall preventing clogging up device, for being inserted into weak seam extraction borehole,
It is characterized by: being applied to weak seam extraction borehole retaining wall preventing clogging up device includes anti-blocking support end, gas collecting tube, constraint pipe
Section, releasing pipe and ventilative tarpaulin, wherein gas collecting tube, constraint tube coupling and releasing pipe successively finish up connection, the body surfaces of gas collecting tube
Gather gas collection hole, and for the anti-blocking support faces end head plugging in the free terminal of gas collecting tube, the anti-blocking support end includes being located at head
The guide head in portion, guide head are equipped with several support rods being spacedly distributed, and the ventilative tarpaulin is connected to support rod and gas collecting tube
It realizes ventilative and obstructs coal slag granules object so that ventilative tarpaulin wraps up gas collecting tube in tail portion.
2. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described
The head for fettering tube coupling inner wall is equipped with the second constraint circle, and gas collecting tube tail portion outer wall is equipped with the first constraint circle, the constraint pipe
Section and gas collecting tube pass through the second constraint circle and the first constraint encloses and cooperates fixed grafting, and the ventilative tarpaulin is fixed on the second constraint circle
With the junction of the first constraint circle.
3. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described
Constraint tube coupling and releasing pipe are connected through a screw thread.
4. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described
The port closing end position of corresponding weak seam extraction borehole is arranged in releasing pipe latter end.
5. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described
Anti-blocking support end includes end pipe close, the closed head for being inserted into gas collecting tube of end pipe close, the end pipe close table
Gather ventilative hole in face.
6. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described
Releasing pipe has multiple, and multiple releasing pipes can finish up docking one by one.
7. one kind is applied to weak seam extraction borehole retaining wall method for sealing, answered using as claimed in any one of claims 1 to 6
For weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: include the following steps,
Ventilative tarpaulin one end is fixed on anti-blocking support end before step 1, sealing of hole；
Gas collecting tube top is inserted into anti-blocking support end by step 2, and the other end of ventilative tarpaulin is then wrapped in gas collecting tube tail
Portion；
Step 3 connects gas collecting tube with constraint tube coupling, so that ventilative tarpaulin end is fixed on gas collecting tube and fetters the connection of tube coupling
Place, tarpaulin of breathing freely wrap up gas collecting tube gas collection hole；
After the completion of step 4, releasing pipe are placed, releasing pipe is pulled into certain distance to outside hole, distance is pulled and is not more than anti-blocking support
Tip body length；
Step 5 seals the gap between weak seam extraction borehole aperture inner wall and extraction pipe outer wall using plugging material
Stifled, sealing of hole is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811544156.0A CN109488365A (en) | 2018-12-17 | 2018-12-17 | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device and method for sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811544156.0A CN109488365A (en) | 2018-12-17 | 2018-12-17 | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device and method for sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109488365A true CN109488365A (en) | 2019-03-19 |
Family
ID=65710543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811544156.0A Pending CN109488365A (en) | 2018-12-17 | 2018-12-17 | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device and method for sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109488365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794688A (en) * | 2020-07-30 | 2020-10-20 | 西安科技大学 | Volatile stable drilling and hole collapse prevention supporting device and method for soft coal seam |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244074A (en) * | 2013-04-27 | 2013-08-14 | 河南理工大学 | Umbrella type hole packer |
| CN104514504A (en) * | 2014-12-18 | 2015-04-15 | 平顶山市安泰华矿用安全设备制造有限公司 | Drilling dust collection hood |
| US20160138397A1 (en) * | 2013-07-26 | 2016-05-19 | China University Of Mining And Technology | Anchoring and anti-clogging drill rod for coal mine floor |
| CN205314961U (en) * | 2016-01-19 | 2016-06-15 | 河南工程学院 | Quick hole sealing device of adopting drilling is taken out in soft coal seam |
| US20180209255A1 (en) * | 2015-01-06 | 2018-07-26 | China University Of Mining And Technology | Method for integrated drilling, slotting and oscillating thermal injection for coal seam gas extraction |
| CN208073543U (en) * | 2018-04-05 | 2018-11-09 | 河南理工大学 | Weak seam gas pumping with can assemble inner supporting structure formula guard aperture pipe in time |
| CN209413936U (en) * | 2018-12-17 | 2019-09-20 | 煤科集团沈阳研究院有限公司 | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device |
-
2018
- 2018-12-17 CN CN201811544156.0A patent/CN109488365A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244074A (en) * | 2013-04-27 | 2013-08-14 | 河南理工大学 | Umbrella type hole packer |
| US20160138397A1 (en) * | 2013-07-26 | 2016-05-19 | China University Of Mining And Technology | Anchoring and anti-clogging drill rod for coal mine floor |
| CN104514504A (en) * | 2014-12-18 | 2015-04-15 | 平顶山市安泰华矿用安全设备制造有限公司 | Drilling dust collection hood |
| US20180209255A1 (en) * | 2015-01-06 | 2018-07-26 | China University Of Mining And Technology | Method for integrated drilling, slotting and oscillating thermal injection for coal seam gas extraction |
| CN205314961U (en) * | 2016-01-19 | 2016-06-15 | 河南工程学院 | Quick hole sealing device of adopting drilling is taken out in soft coal seam |
| CN208073543U (en) * | 2018-04-05 | 2018-11-09 | 河南理工大学 | Weak seam gas pumping with can assemble inner supporting structure formula guard aperture pipe in time |
| CN209413936U (en) * | 2018-12-17 | 2019-09-20 | 煤科集团沈阳研究院有限公司 | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794688A (en) * | 2020-07-30 | 2020-10-20 | 西安科技大学 | Volatile stable drilling and hole collapse prevention supporting device and method for soft coal seam |
| CN111794688B (en) * | 2020-07-30 | 2022-03-22 | 西安科技大学 | Volatile stable drilling and hole collapse prevention supporting device and method for soft coal seam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105114030B (en) | A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling | |
| CN103195471B (en) | Method for preventing drilling collapse of downhole coal bed | |
| CN203081397U (en) | Grouting bag type hole packer | |
| CN109577908A (en) | A kind of high grouting pressure of powder particle-blocks the mash gas pumping drilling hole sealing device and method in crack | |
| CN204609832U (en) | A kind of coal mine gas quick fluid filling hole sealing device with pressure | |
| CN204252941U (en) | Mining hole-sealing gas hole packer with pressure | |
| CN108678802A (en) | A kind of coal mine bores, punching, takes out integrated outburst prevention device and method | |
| CN102979478B (en) | Water stopping device for water inrush borehole drilling | |
| CN103993902B (en) | A kind of mash gas pumping drilling two step slip-casting hole-sealing method | |
| CN208534448U (en) | A kind of mash gas pumping drilling hole sealing device | |
| CN106930724A (en) | One kind is rich in water borehole sealing and gas pumping integral method | |
| CN103912304A (en) | Method for locally extracting gas of soft coal seams | |
| CN209413936U (en) | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device | |
| CN201218073Y (en) | Drill hole pipe reinforcing device | |
| CN109488365A (en) | One kind being applied to weak seam extraction borehole retaining wall preventing clogging up device and method for sealing | |
| CN110374673A (en) | A kind of suction road downlink layer-through drilling is calmed the anger drainage and hole sealing method | |
| CN202745858U (en) | Drill hole volume deformation testing device | |
| CN202031533U (en) | Shunting-type grouting plugging device for gas extraction center | |
| CN204571919U (en) | To mensuration coal-bed gas pressure drilling and sealing device under colliery | |
| CN206190278U (en) | Bi -polar water pressure control single loop blocks up water detection instrument | |
| CN103967444A (en) | Gas extraction hole drilling hole sealing technology in manner of two-end self-blocking and under pressure | |
| CN105134285A (en) | Three-blocking and two-injecting gas extraction hole sealing method | |
| CN205858406U (en) | A kind of some note formula hole sealing device | |
| CN105317397A (en) | Double cloth bags type grouting sealing set and method | |
| CN205477518U (en) | Boring press seal hole device in colliery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 113122 No.11 Binhe Road, Shenfu demonstration area, Fushun City, Liaoning Province Applicant after: Shenyang Research Institute Co.,Ltd. Address before: 113122 No. 11 Binhe Road, Fushun Economic Development Zone, Fushun City, Liaoning Province Applicant before: CCTEG (China Coal Technology and Engineering Group Corp.) |