CN207988997U - Inwash individual well multi-section multi-layer slip casting new casing - Google Patents
Inwash individual well multi-section multi-layer slip casting new casing Download PDFInfo
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- CN207988997U CN207988997U CN201820133861.0U CN201820133861U CN207988997U CN 207988997 U CN207988997 U CN 207988997U CN 201820133861 U CN201820133861 U CN 201820133861U CN 207988997 U CN207988997 U CN 207988997U
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Abstract
The utility model provides a kind of inwash individual well multi-section multi-layer slip casting new casing, described sleeve pipe is made of internal layer Grouting Pipe and the outer tube being sleeved on outside the internal layer Grouting Pipe, the outer tube includes several sections of screen pipes and several sections of real pipes, several filter hole are provided on the tube wall of the screen pipe, the screen pipe and the real pipe are arranged alternately, the screen pipe is arranged in the slip casting interval, and the reality pipe is arranged in the non-slip casting interval；It is provided with stop grouting plug between the outer tube and the internal layer Grouting Pipe, the top of described sleeve pipe is provided with boring cover.The utility model solves the problems, such as that the operating time existing in the prior art is long, generation expense is huge, technical difficulty is big low with safety, have developed the new casing of suitable inwash individual well multi-section multi-layer slip casting, greatly improve the safety of deep vertical stratum consolidation slip casting, and construction risk is substantially reduced, social and economic benefits are notable.
Description
Technical field
The utility model is related to mine construction fields, and in particular to a kind of inwash individual well multi-section multi-layer slip casting novel complete
Pipe.
Background technology
Since the 1980s, coal resources in China mining rate continues to increase, and superficial part resource is increasingly reduced, inside state
Mine is divided to subsequently enter deep coal mining state, more and more shaft of vertical well need to pass through deep alluvium.With
A large amount of exploitations of the large and medium-sized mine to underground coal resources, form goaf, and subterranean body structure and stress state occur very big
Variation.When loose aquifer is connected in goaf overlying rock water flowing fractured zone, Cenozoic's scall water resource is easily caused
Be largely lost, form Groundwater movement, cause stratum differential settlement, and use ground drilling slip casting to stratum reinforced by
In the water conservancy channel that can block aquifer water-bearing stratum, retardance aquifer water-bearing stratum is hydrophobic, can slow down, reduce the heavy of pit shaft surrounding formations
Drop, the inefficient fruit of overall cost is good, thus is more and more widely used.It is needed when generally for Cenozoic's scall slip casting
Staged and layered position is wanted to carry out, when single drilling well carries out multi-section multi-layer slip casting, conventional at present there are two types of modes：
The first：Heavy caliber is first beaten, down tube is simultaneously cemented the well with neat slurry, is and then drilled interval of interest and is carried out slip casting, so
After be further continued for being drilled down into, then lower small casing and neat slurry well cementation, then slip casting carried out to interval of interest, reciprocal procedure above,
Until last layer of slip casting terminates.
Second：Casing (real pipe) is set in full underground, and annular gap between casing and the borehole wall is sealed entirely with neat slurry
It closes, then carries out blasting and perforating respectively to slip casting interval of interest or pipe cutting forms slip casting channel and carries out slip casting again.
The both the above situation operating time is long, and generated expense is huge, and technical difficulty is also big, and safety is also accordingly dropped
It is low.Therefore, in order to improve efficiency and the safety of inwash individual well multi-section multi-layer slip casting, carry out inwash individual well multilayer
The research of section slip casting new casing is extremely urgent.
Utility model content
The purpose of this utility model is to provide a kind of inwash individual well multi-section multi-layer slip casting new casing, this practicality is new
The technical solution of type solve present in existing single drilling well multi-section multi-layer slurry injection technique the operating time is long, generation expense is huge,
The problem that technical difficulty is big and safety is low, has developed the new casing of suitable inwash individual well multi-section multi-layer slip casting, and
The grouting construction method for giving cooperation new casing, can fill up and there is no inwash individual well multi-section multi-layer safe and efficient at present
The blank of grouting equipment and method is the important component of inwash grouting and reinforcing comprehensive treatment scheme, greatly carries
The high safety of deep vertical stratum consolidation slip casting, and construction risk is substantially reduced, social and economic benefits are notable.
To achieve the goals above, the utility model provides the following technical solutions：
A kind of inwash individual well multi-section multi-layer slip casting new casing, the multi-section multi-layer include several slip casting intervals and several
Non- slip casting interval, the slip casting interval and the non-slip casting interval are arranged alternately, and are an institute between two slip casting intervals
Non- slip casting interval is stated, is a slip casting interval between two non-slip casting intervals, the bottom of the individual well is set as
The slip casting interval, described sleeve pipe are placed in injected hole, and described sleeve pipe is by internal layer Grouting Pipe and is sleeved on outside the internal layer Grouting Pipe
The outer tube in portion forms, and the outer tube includes several sections of screen pipes and several sections of real pipes, if being provided on the tube wall of the screen pipe
Dry filter hole, the screen pipe and the real pipe are arranged alternately, and the screen pipe is arranged in the slip casting interval, the real pipe
It is arranged in the non-slip casting interval；Stop grouting plug, the stop grouting plug are provided between the outer tube and the internal layer Grouting Pipe
It can be moved up and down along described sleeve pipe, the top of described sleeve pipe be provided with boring cover, the boring cover can cover the internal layer note
Part between slurry pipe and the outer tube.
Further, in a kind of above-mentioned casing, the outside of the filter hole is provided with several filleting bands, the filleting band
It is wrapped in the outside of the screen pipe and for blocking the filter hole.
Further, in a kind of above-mentioned casing, the filleting band has been externally wrapped with nylon gauze, the nylon gauze
For preventing the sand of the slip casting interval from entering in the screen pipe.
Further, in a kind of above-mentioned casing, the nylon gauze has been externally wrapped with tied silk, and the tied silk is for solid
The fixed nylon gauze winds one on the nylon gauze and along the short transverse of the screen pipe every 150mm~250mm
Enclose the tied silk.
Further, in a kind of above-mentioned casing, the punching rate of the screen pipe is more than having for the slip casting interval soil body
Imitate porosity, a diameter of 12~18mm of the filter hole.
Further, in a kind of above-mentioned casing, described sleeve pipe can also be used to inwash individual well multi-section multi-layer pressure water
Experiment and bailing test.
Analysis solves existing it is found that the utility model discloses a kind of inwash individual well multi-section multi-layer slip casting new casing
Have present in single drilling well multi-section multi-layer slurry injection technique that the operating time is long, generation expense is huge, technical difficulty is big low with safety
The problem of, the new casing of suitable inwash individual well multi-section multi-layer slip casting is had developed, can fill up and there is no huge thick alluviation at present
The blank of layer individual well multi-section multi-layer safe and efficient grouting equipment and method, is the weight of inwash grouting and reinforcing comprehensive treatment scheme
Component part is wanted, the safety of deep vertical stratum consolidation slip casting is greatly improved, and substantially reduces construction risk, society,
Remarkable in economical benefits.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide a further understanding of the present invention, this practicality
Novel illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.
Wherein：
Fig. 1 is the new casing mortar depositing construction schematic diagram of the utility model embodiment；
Fig. 2 is the new casing cementing operation schematic diagram of the utility model embodiment；
Fig. 3 is the new casing manufacturing process schematic diagram of the utility model embodiment；
Reference sign：1 screen pipe, 2 real pipes, 3 internal layer Grouting Pipes, 4 boring covers, 5 filter hole, 6 filleting bands, 7 nylon yarns
Net, 8 tied silks, 9 stop grouting plugs, 10 annular gaps, 11 clay cement grouts, 12 slip casting intervals, 13 non-slip casting intervals.
Specific implementation mode
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.Each example passes through the utility model
The mode of explanation provide and unrestricted the utility model.In fact, those skilled in the art will be clear that, this reality is not being departed from
In the case of with novel range or spirit, it can modify in the present invention and modification.For example, being illustrated or described as one
The feature of a part for a embodiment can be used for another embodiment, to generate another embodiment.Thus, it may be desirable to
The utility model includes the such modifications and variations being included into the range of the following claims and their equivalents.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings,
It is merely for convenience of description the utility model rather than requires the utility model must be with specific azimuth configuration and operation, therefore
It should not be understood as limiting the present invention.The term " connected " that is used in the utility model, " connection ", " setting " should be done extensively
Reason and good sense solution may be a detachable connection for example, it may be being fixedly connected；It can be directly connected, middle part can also be passed through
Part is indirectly connected；Can be wired electrical connection, radio connection, can also be wireless communication signals connection can also be channel radio
Believe signal connection, for the ordinary skill in the art, can understand that the specific of above-mentioned term contains as the case may be
Justice.
As shown in Figure 1 to Figure 2, embodiment according to the present utility model provides a kind of inwash individual well multi-section multi-layer
Slip casting new casing, multi-section multi-layer include several slip casting intervals 12 and several non-slip casting intervals 13, slip casting interval 12 and non-grouting layer
Section 13 is arranged alternately, and is a non-slip casting interval 13 between two slip casting intervals 12, is one between two non-slip casting intervals 13
Slip casting interval 12, individual well bottom are set as slip casting interval 12, and casing is placed in injected hole, and casing is by internal layer Grouting Pipe 3 and set
Outer tube composition outside internal layer Grouting Pipe 3.Internal layer Grouting Pipe 3 is used to provide channel for slip casting, and outer tube includes several sections of filterings
The real pipes 2 of pipe 1 and several sections are provided with several filter hole 5 on the tube wall of screen pipe 1, and screen pipe 1 and real pipe 2 are arranged alternately, filter
Pipe 1 is arranged in slip casting interval 12, and real pipe 2 is arranged in non-slip casting interval 13.
Stop grouting plug 9 is provided between outer tube and internal layer Grouting Pipe 3, stop grouting plug 9 can be moved up and down along casing, stop grouting plug
9 expansion can be such that stop grouting plug 9 closely depends between outer tube and internal layer Grouting Pipe 3, and slurries when slip casting is avoided to backflow along inside pipe casing
Go out outside injected hole.It, should in the adjacent real pipe 2 of screen pipe 1 that stop grouting plug 9 is always positioned in current slip casting interval 12 when slip casting
Real pipe 2 is located at the top of the screen pipe 1.The top of casing is provided with boring cover 4, boring cover 4 can cover outer tube and internal layer slip casting
The setting of part between pipe 3, boring cover 4 can prevent clay cement grout 11 when well cementation from scurrying into screen pipe 1.
Further, as shown in figure 3, the outside of filter hole 5 is provided with several filleting bands 6, filleting band 6 is wrapped in screen pipe
1 outside is simultaneously used to block filter hole 5, and the setting of filleting band 6 can prevent clay cement grout 11 when well cementation from scurrying into screen pipe 1
It is interior.Filleting band 6 has been externally wrapped with nylon gauze 7, and the setting of nylon gauze 7 can prevent 12 sand of slip casting interval from entering filtering
In pipe 1, what plug screen pipe 1.Nylon gauze 7 has been externally wrapped with tied silk 8, and tied silk 8 is for fixing nylon gauze 7, in nylon yarn
On net 7 and along the short transverse of screen pipe 1 every 150mm~250mm (such as：160mm、170mm、180mm、190mm、200mm、
210mm, 220mm, 230mm, 240mm) a circle tied silk 8 is wound, preferably every 200mm, such setting can ensure nylon
Make slurries flowing smooth under the premise of gauze 7 is firm, is conducive to improve slip casting efficiency.
Further, the punching rate of screen pipe 1 is more than the effective drainage porosity of 12 soil body of slip casting interval, the diameter of filter hole 5
(such as 12mm~18mm：12mm、13mm、14mm、15mm、16mm、17mm、18mm).The punching rate of screen pipe 1 is by slip casting interval
12 stratum effective drainage porosity determines, determines the effective drainage porosity on stratum according to formation lithology by soil test.Such as slip casting
The porosity on the stratum of interval 12 is 5%, then the punching rate of screen pipe 1 should be slightly bigger than 5%, such as screen pipe 1 punching rate
It is 5.5%.By adjusting the quantity for the filter hole 5 being evenly distributed on slip casting screen pipe 1, to meet the punching rate of screen pipe 1
Requirement, and then meet slip casting requirement.
Further, casing can also be used to inwash individual well multi-section multi-layer packer permeability test and bailing test.
A kind of construction method of casing is included the following steps using above-mentioned casing：
1) it sizes mixing：Prepare mud before down tube, every cubic metre of mud by 200~300kg bentonites, 3~5kg soda ash, 100~
150g sodium carboxymethyl celluloses, 8~10g polyacrylamides, 1~3kg humic acid potassiums and water mix, after the completion of sizing mixing,
Measure the proportion of mud；When down tube, mud can form one layer of mud film in boring procedure on the hole wall of injected hole, right
The hole wall of injected hole is protected, and the hole wall collapse of injected hole is prevented, while can also take slag and cooling drilling tool.
2) making of screen pipe 1：As shown in figure 3, filter hole 5 is made on screen pipe 1 by design requirement, in screen pipe 1
Be externally wrapped with filleting band 6, filleting band 6 is externally wrapped with nylon gauze 7, by design requirement being externally wrapped in nylon gauze 7
Tied silk 8；
Filleting band 6 is chosen as follows：(1) measure the depth H of each slip casting interval 12, unit is rice, mud density ρ,
11 density p of clay cement grout '；(2) it is P, P to calculate the minimum pressure that filleting band 6 is born by the pressure at both sides difference of filleting band 6
=(ρ '-ρ) * H/1000；(3) the filleting band 6 that can bear that pressure is 1.5P is chosen.
3) down tube：By the sequential segment tripping in screen pipe 1 of preset slip casting interval 12 and non-slip casting interval 13 and real pipe 2；
Boring cover 4 is arranged in the real pipe 2 adjacent with the lowermost screen pipe 1, on the top of casing in lower stop grouting plug 9, in annular gap 10
Interior circulation step 1) in mud obtained, it is ensured that annular gap 10 is unimpeded.
4) it cements the well：As shown in Figure 2 (in figure direction shown in arrow be clay cement grout 11 flow direction), well cementation purpose exist
It is fixed in injected hole in by casing, protection and supporting sleeve, while insulating the contact between each slip casting interval 12.Press ring in advance
The volume in shape gap 10 prepares clay cement grout 11, and clay cement grout 11 is mixed by water, cement and clay, by clay cement
Slurry 11 is pumped into injected hole, until being full of clay cement grout 11 in annular gap 10, injected hole returns slurry, and termination of pumping is waited solidifying 8 hours and solved
Stop grouting plug 9.Stop grouting plug 9 is an expansion device, and stop grouting plug 9 expands when slip casting, and when solution plug makes this expansion cancel, and difference is only starched
The solution plug mode of plug 9 is different.
The proportioning of each ingredient by weight is in clay cement grout 11：Water:Cement:Clay=1:0.6~0.8:0.2~0.3,
Such as every cubic metre of clay cement grout 11 by 744~751kg water, 446~601kg cement and 298~150kg clays mix and
At；The proportioning of each ingredient by weight is preferably in clay cement grout 11：Water:Cement:Clay=1:0.7:0.3, such as every cube
Rice clay cement grout 11 is mixed by 748kg water, 523kg cement and 224kg clays.Such setting makes the grout cures time
Long, intensity is low, is easy to destroy by well-flushing, discloses slip casting interval 12, while playing the purpose of stifled water proof again.
5) well-flushing：First use the mud in clear water circulation flushing casing up to clear water, then by a concentration of 0.6% pyrophosphoric acid
Sodium solution is pumped into the clear water replaced in casing in casing and impregnates 24 hours, and the immersion of sodium pyrophosphate solution can make filleting band 6
Softening, then drawn and washed repeatedly up and down with piston hole flushing device, after be changed to high-pressure jet hole flushing device again and rinse repeatedly up and down, destroy screen pipe
Cured clay cement grout 11 and filleting band 6 outside 1, make slip casting interval 12 be connected to screen pipe 1, the slurries in internal layer Grouting Pipe 3
Slip casting interval 12 can be injected, finally irrigating cannula repeatedly, until water is clear in casing, free from admixture.
6) slip casting：As shown in Figure 1, pulling up stop grouting plug 9, slip casting is carried out respectively to all slip casting intervals 12, until last
One layer of slip casting interval 12, slip casting terminates.
Slip casting is carried out to slip casting interval 12 respectively by the sequence from the bottom of injected hole to top, to a certain slip casting interval 12
When carrying out slip casting, the stop grouting plug 9 in casing is pulled to the reality adjacent with the top of screen pipe 1 in current slip casting interval 12 first
In pipe 2, slip casting then is carried out to the slip casting interval 12, after the completion of waiting for the grouting layer slip casting, stop grouting plug 9 is pulled up and is noted to purpose
In the adjacent real pipe 2 in the top of screen pipe 1 in pulp layer section 12, and slip casting is carried out to purpose slip casting interval 12, goes directly last
A 12 slip casting of slip casting interval is completed.
Further, the soil body effective drainage porosity of grouting amount and slip casting interval 12 meets following relational expression：Q=π r2H η, formula
In：Q-slurries injection rate, unit m3；The soil body effective drainage porosity of η-slip casting interval 12, unit %；H-slip casting interval
12 thickness, unit m；R-dilation angle, unit m.
Compared with prior art, technical solution provided by the utility model has following excellent effect：
1, cost-effective, drilling and expense caused by blasting and perforating or pipe cutting are to use in the utility model to filter step by step
7 to 8 times of pipe 1.
2, the safety cemented the well with clay cement grout 11 in the utility model greatly improves, and neat slurry is cemented the well to water-bearing layer
It is affected, easily infiltrates into water-bearing layer, be unable to control, be easy to cause grouting difficulty.
It is more that inwash individual well multi-section multi-layer slip casting new casing provided by the utility model solves existing single drilling well
Operating time present in interval slurry injection technique is long, leads to the problem of that expense is huge, technical difficulty is big low with safety, has developed
It is suitble to the new casing of inwash individual well multi-section multi-layer slip casting, can fills up and inwash individual well multi-section multi-layer there is no to pacify at present
Overall height imitates the blank of grouting equipment and method, is the important component of inwash grouting and reinforcing comprehensive treatment scheme, pole
The earth improves the safety of deep vertical stratum consolidation slip casting, and substantially reduces construction risk, and social and economic benefits are notable.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of inwash individual well multi-section multi-layer slip casting new casing, the multi-section multi-layer includes several slip casting intervals and several non-
Slip casting interval, the slip casting interval and the non-slip casting interval are arranged alternately, for described in one between two slip casting intervals
Non- slip casting interval is a slip casting interval between two non-slip casting intervals, and the bottom of the individual well is set as institute
State slip casting interval, which is characterized in that
Described sleeve pipe is placed in injected hole, and described sleeve pipe is by internal layer Grouting Pipe and the outer tube group being sleeved on outside the internal layer Grouting Pipe
At the outer tube includes several sections of screen pipes and several sections of real pipes, and several filter hole, institute are provided on the tube wall of the screen pipe
It states screen pipe and the real pipe is arranged alternately, the screen pipe is arranged in the slip casting interval, and the reality pipe is arranged described
In non-slip casting interval；
Stop grouting plug is provided between the outer tube and the internal layer Grouting Pipe, the stop grouting plug can move down in described sleeve pipe
It is dynamic, the top of described sleeve pipe is provided with boring cover, the boring cover can cover between the internal layer Grouting Pipe and the outer tube
Part.
2. casing according to claim 1, which is characterized in that
The outside of the filter hole is provided with several filleting bands, and the filleting band is wrapped in the outside of the screen pipe and for sealing
Block up the filter hole.
3. casing according to claim 2, which is characterized in that
The filleting band has been externally wrapped with nylon gauze, and the nylon gauze is for preventing the sand of the slip casting interval from entering
In the screen pipe.
4. casing according to claim 3, which is characterized in that
The nylon gauze has been externally wrapped with tied silk, and the tied silk is for fixing the nylon gauze, in the nylon gauze
Above and along the short transverse of the screen pipe every the one circle tied silk of 150mm~250mm windings.
5. casing according to claim 1, which is characterized in that
The punching rate of the screen pipe is more than the effective drainage porosity of the slip casting interval soil body, a diameter of 12mm of the filter hole
~18mm.
6. casing according to claim 1, which is characterized in that
Described sleeve pipe can also be used to inwash individual well multi-section multi-layer packer permeability test and bailing test.
7. casing according to claim 2, which is characterized in that
It is injected separately into mud and clay cement grout in described sleeve pipe domestic demand, is calculated by the pressure at both sides difference of the filleting band described
The minimum pressure that filleting band is born is P, and P=(ρ '-ρ) * H/1000, wherein H is the depth of slip casting interval, unit is rice, mud
Pulp density ρ, clay cement grout density p ', the filleting band is that can bear the filleting band that pressure is 1.5P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820133861.0U CN207988997U (en) | 2018-01-25 | 2018-01-25 | Inwash individual well multi-section multi-layer slip casting new casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820133861.0U CN207988997U (en) | 2018-01-25 | 2018-01-25 | Inwash individual well multi-section multi-layer slip casting new casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207988997U true CN207988997U (en) | 2018-10-19 |
Family
ID=63822093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820133861.0U Expired - Fee Related CN207988997U (en) | 2018-01-25 | 2018-01-25 | Inwash individual well multi-section multi-layer slip casting new casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207988997U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222882A (en) * | 2018-01-25 | 2018-06-29 | 安徽省煤田地质局第勘探队 | Inwash individual well multi-section multi-layer slip casting new casing and construction method |
| CN111396073A (en) * | 2020-03-25 | 2020-07-10 | 中煤新集能源股份有限公司 | Over-fault advance support method |
| CN113911910A (en) * | 2021-07-30 | 2022-01-11 | 北京中煤矿山工程有限公司 | Pipeline assembly unit and pipeline assembly that many pipelines were transferred simultaneously in vertical |
-
2018
- 2018-01-25 CN CN201820133861.0U patent/CN207988997U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222882A (en) * | 2018-01-25 | 2018-06-29 | 安徽省煤田地质局第勘探队 | Inwash individual well multi-section multi-layer slip casting new casing and construction method |
| CN108222882B (en) * | 2018-01-25 | 2024-01-16 | 安徽省煤田地质局第一勘探队 | Novel sleeve pipe for giant thick-film lamination Shan Jingduo layer section grouting and construction method |
| CN111396073A (en) * | 2020-03-25 | 2020-07-10 | 中煤新集能源股份有限公司 | Over-fault advance support method |
| CN113911910A (en) * | 2021-07-30 | 2022-01-11 | 北京中煤矿山工程有限公司 | Pipeline assembly unit and pipeline assembly that many pipelines were transferred simultaneously in vertical |
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Granted publication date: 20181019 Termination date: 20190125 |