CN103850699B - A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method - Google Patents
A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method Download PDFInfo
- Publication number
- CN103850699B CN103850699B CN201410129441.1A CN201410129441A CN103850699B CN 103850699 B CN103850699 B CN 103850699B CN 201410129441 A CN201410129441 A CN 201410129441A CN 103850699 B CN103850699 B CN 103850699B
- Authority
- CN
- China
- Prior art keywords
- inner supporting
- supporting structure
- pipe
- space
- door
- 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.)
- Active
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000004033 plastic Substances 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000004079 fireproofing Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000012943 hotmelt Substances 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 235000019994 cava Nutrition 0.000 abstract 1
- 238000005065 mining Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 241001149930 Protura <class> Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Landscapes
- Special Wing (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method, belong to the double collapse hole that prevents of coal bed drilling mash gas extraction and manage.This pipe selects antistatic, fire proofing masterbatch to make, and pipe internal construction is successively by inner support section and hollow section cycle arrangement.Processing technology is: be first expressed in the middle of mouthful mould by material masterbatch by plastic extruder, at the pipe shaft space of mouth mould and inner supporting structure spatial joins place, the door of controllable switch is set between inner supporting structure space and outlet of extruder respectively, by the processing model regulating the unlatching of door to control guard aperture pipe.Guard aperture pipe braced structures and the non-braced structures of machine-shaping are alternately arranged and are formed girder construction, and inner supporting structure comprises herringbone and cross.Change the compressive strength that pipe effectively can improve hole pipe, enhance anti-collapse hole ability, and then extend the hole pumping and mining gas time, can significantly improve gas pumping efficiency.The soft high gas layer that being particularly useful for holes easily caves in.
Description
Technical field
The present invention relates to a kind of coal bed drilling anti-collapse hole gas pumping pipe, particularly relate to and be applicable to weak seam gas pumping inner supporting type guard aperture pipe and preparation method.
Technical background
According to the requirement of country " coal mine gas drainage temporary provisions up to standard " (2012), the serious mine of Gas Disaster must carry out gas pumping, and it is up to standard to realize extraction.But weak seam proportion is comparatively large in China coal seam, weak seam collapse hole is a great problem of restriction gas pumping, seriously hinders mine gas extraction process up to standard.The effective technology measure of current control weak seam collapse hole is few, and the method for guard aperture pipe is sent in main employing in boring.This guard aperture pipe all belongs to thin-wall plastic pipe substantially, structure is hollow, and its radial crushing strength is limited.Especially in weak seam boring, seriously, the radial compressive stress that guard aperture pipe bears far exceedes the compressive strength of its tubing itself, and serious plastic strain will occur such guard aperture pipe for boring distortion, situation of caving in, cause undergauge, limit effective flow channel of guard aperture pipe gas pumping.If collapse hole region is near aperture, whole boring will lose gas pumping ability.Therefore, the borehole collapse serious harm structural stability of guard aperture pipe, limits the effect of drilling gas extraction.
China Patent Publication No. CN201982132U proposes a kind of gas pumping guard aperture tubular structure, the conehead pipe in guard aperture pipe tip designs, guard aperture pipe propelling resistance reduces relatively, but overall pipe shaft remains hollow design, still cannot solve the difficult problem that guard aperture pipe is crushed when running into local collapse hole.
Summary of the invention
The object of the invention is to provide a kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method, solve the difficult problem that coal mine gas extraction guard aperture pipe anti-collapse hole ability is low.
Object of the present invention realizes in the following manner: this pipe selects antistatic, fire proofing to make, and pipe internal construction is successively by inner support section and hollow section cycle arrangement; Guard aperture pipe inner support segment length is 15-25cm, and hollow section length is 80-120cm; Described inner support section is herringbone inner supporting structure or cross inner supporting structure; Described hollow section is hollow-core construction, and the pipe shaft of hollow-core construction has sieve aperture.
Described herringbone inner supporting structure is made up of the supporter that three distribute in hexagonal angle, and three supporters intersect at tube hub, and end connects with tube wall respectively.Supporter is cuboid, and thickness is 2 ~ 4mm, and width is equal with bore.
Described cross inner supporting structure is made up of the supporter that four distribute in 90 ° of angles, and four supporters are connected on tube hub, and end connects with tube wall respectively; Supporter is cuboid, and thickness is 4 ~ 6mm, and width is equal with bore.
Described inner supporting type guard aperture tube preparation method, comprises the following steps:
A. insert in plastic extruder by tubing masterbatch, close pipe shaft space and the door at inner supporting structure spatial joins place and the door between inner supporting structure space and extruder, masterbatch is heated to hot melt state and is squeezed in the middle of mouthful mould pipe shaft space afterwards;
B. when after hot melting plastic flow export mould certain length, open pipe shaft space and the door at inner supporting structure spatial joins place and the door between inner supporting structure space and outlet of extruder simultaneously, make hot melting plastic flow into pipe shaft space and the inner supporting structure space of mouthful mould simultaneously, when after hot melting plastic flow export mould certain length, close pipe shaft space and the door at inner supporting structure spatial joins place and the door between inner supporting structure space and outlet of extruder simultaneously;
C. step b is repeated;
D. then enter shaping equipment and cooling unit by the hot melting plastic of mouth mould, finally arrive cutter sweep.
Described mouth mould is divided into pipe shaft space and inner supporting structure space; Pipe shaft space is annular; Inner supporting structure space is herringbone or cross; The junction in pipe shaft space and inner supporting structure space is provided with door, is also provided with door between inner supporting structure space and outlet of extruder.
Beneficial effect: owing to have employed such scheme, be applicable to soft coal bed in coal mine gas pumping inner supporting type guard aperture pipe, the basis not changing tubing material has been carried out the innovation of preparation method and structure, can be good at improving guard aperture caliber to anti-pressure ability, effectively the anti-collapse hole ability of opposing guard aperture pipe.
1) use inner supporting type guard aperture pipe, effectively can improve guard aperture pipe radial crushing strength, strengthen its anti-collapse hole ability, thus make boring keep corresponding geometry within the regulation extraction phase, for Gas Flow provides open conduit.
2) internal construction is successively by hollow-core construction and inner supporting structure cycle arrangement, and guard aperture pipe supporting section and hollow section can be made to form bridge pier type structure, when the radial crushing strength of guard aperture pipe can not obviously reduce, compares full pipe shaft and supports more cost-saving.Meanwhile, pipe shaft weight is also effectively controlled, and is convenient in underworkings restricted clearance, carry out tubing transport and guard aperture technological operation.
3) circulation by controlling mouth mould door is opened and is realized the alternately shaping of guard aperture pipe inner support section and hollow section, and method is simple, and can ensure the sustainability that thermoplastic material is processed, operability is good.
Accompanying drawing explanation
Fig. 1 is herringbone inner supporting structure guard aperture pipe front view of the present invention.
Fig. 2 is herringbone inner supporting structure guard aperture pipe lateral view of the present invention.
Sectional drawing when Fig. 3 is herringbone mouth mould door of the present invention unlatching.
Sectional drawing when Fig. 4 is herringbone mouth mould door of the present invention closedown.
Fig. 5 is that cross inner supporting structure guard aperture of the present invention manages and protects front view.
Fig. 6 is cross inner supporting structure guard aperture pipe lateral view of the present invention.
Sectional drawing when Fig. 7 is cross mouth mould door of the present invention unlatching.
Sectional drawing when Fig. 8 is cross mouth mould door of the present invention closedown.
In figure: 1, herringbone inner supporting structure; 2, hollow-core construction; 3, sieve aperture; 4, herringbone mouth mould pipe shaft space; 5, herringbone mouth mould inner supporting structure space; 6, the door at herringbone mouth mould pipe shaft space and inner supporting structure spatial joins place; 7, the door between herringbone mouth mould inner supporting structure space and outlet of extruder; 8, cross inner supporting structure; 9, cross mouth mould pipe shaft space; 10, cross mouth mould inner supporting structure space; 11, the door at cross mouth mould pipe shaft space and inner supporting structure spatial joins place; 12, the door between cross mouth mould inner supporting structure space and outlet of extruder.
Specific implementation method
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Embodiment 1: this pipe selects antistatic, fire proofing to make, pipe internal construction is successively by inner support section and hollow section cycle arrangement; Guard aperture pipe inner support segment length is 15-25cm, and hollow section length is 80-120cm; Described inner support section is herringbone inner supporting structure 1 or cross inner supporting structure 8; Described hollow section is hollow-core construction 2, and the pipe shaft of hollow-core construction 2 has sieve aperture 3.
Construction drill diameter is 89mm, hole depth 100m.This pipe is the hard PE plastic pipe of thin-walled hollow, pipe range 4m, thickness of pipe wall 8mm.Pipe internal construction is successively by herringbone inner supporting structure 1 and hollow-core construction 2 cycle arrangement (see accompanying drawing 1), and guard aperture pipe herringbone inner supporting structure 1 length is 20cm, and hollow-core construction 2 length is 100cm, and the pipe shaft of hollow-core construction 2 has sieve aperture 3.
As shown in Figure 2, herringbone inner supporting structure 1 is made up of the supporter that three distribute in hexagonal angle, and three supporters intersect at tube hub, and end connects with tube wall respectively.Supporter is cuboid, and thickness is 2mm, and width is equal with bore.
Inner supporting type guard aperture pipe processing technique comprises the following steps:
A. tubing masterbatch is inserted in plastic extruder, close herringbone mouth mould pipe shaft space 4 and the herringbone mouth mould pipe shaft space of junction, herringbone mouth mould inner supporting structure space 5 and the door 6 at inner supporting structure spatial joins place and the door 7 between herringbone mouth mould inner supporting structure space and outlet of extruder, masterbatch is heated to hot melt state and is squeezed in the middle of herringbone mouth mould pipe shaft space 4 afterwards;
B. after hot melting plastic flows out herringbone mouth mould 100cm, open herringbone mouth mould pipe shaft space 4 and the herringbone mouth mould pipe shaft space of junction, herringbone mouth mould inner supporting structure space 5 and the door 6 at inner supporting structure spatial joins place and the door 7 between herringbone mouth mould inner supporting structure space and outlet of extruder simultaneously, make hot melting plastic flow into herringbone mouth mould pipe shaft space 4 and herringbone mouth mould inner supporting structure space 5 simultaneously, when after hot melting plastic flow export mould 20cm, close the herringbone mouth mould pipe shaft space of junction, herringbone mouth mould inner supporting structure space 5 and the door 6 at inner supporting structure spatial joins place and the door 7 between inner supporting structure space and outlet of extruder simultaneously,
C. step b is repeated;
D. then enter shaping equipment and cooling unit by the hot melting plastic of mouth mould, finally arrive cutter sweep.
Herringbone mouth mould (Fig. 3) is divided into herringbone mouth mould pipe shaft space 4 and herringbone mouth mould inner supporting structure space 5.Herringbone mouth mould pipe shaft space 4 is annular.Herringbone mouth mould inner supporting structure space 5 is herringbone.Herringbone mouth mould pipe shaft space 4 is provided with door 6, the herringbone mouth mould inner supporting structure space between herringbone mouth mould inner supporting structure space 5 and outlet of extruder and the door 7 between outlet of extruder at herringbone mouth mould pipe shaft space and inner supporting structure spatial joins place with the junction in herringbone mouth mould inner supporting structure space 5.
Embodiment 2: construction drill diameter is 94mm, hole depth 120m.This pipe is thin-walled hollow PVC plastic pipe, pipe range 4m, thickness of pipe wall 8mm.Pipe internal construction is successively by cross inner supporting structure 8 and hollow-core construction 2 cycle arrangement (see accompanying drawing 5), and guard aperture pipe cross inner supporting structure 8 length is 25cm, and hollow-core construction 2 length is 120cm.
As shown in Figure 6, cross inner supporting structure 8 is made up of the supporter that four distribute in 90 ° of angles, and four supporters are connected on tube hub, and end connects with tube wall respectively.Supporter is cuboid, and thickness is 4 ~ 6mm, and width is equal with bore.
Inner supporting type guard aperture pipe processing technique comprises the following steps:
A. tubing masterbatch is inserted in plastic extruder, close cross mouth mould pipe shaft space 9 and the cross mouth mould pipe shaft space of junction, cross mouth mould inner supporting structure space 10 and the door 11 at inner supporting structure spatial joins place and the door 12 between cross mouth mould inner supporting structure space and outlet of extruder, masterbatch is heated to hot melt state and is squeezed in the middle of cross mouth mould pipe shaft space 9 afterwards.
B. after hot melting plastic flows out cross mouth mould 120cm, open cross mouth mould pipe shaft space 9 and the cross mouth mould pipe shaft space of junction, cross mouth mould inner supporting structure space 10 and the door 11 at inner supporting structure spatial joins place and the door 12 between cross mouth mould inner supporting structure space and outlet of extruder simultaneously, make hot melting plastic flow in cross mouth mould pipe shaft space 9 and cross mouth mould inner supporting structure space 10 simultaneously, when after hot melting plastic flow export mould 25cm, close cross mouth mould pipe shaft space 9 and the cross mouth mould pipe shaft space of junction, cross mouth mould inner supporting structure space 10 and the door 11 at inner supporting structure spatial joins place and the cross mouth mould inner supporting structure space between cross mouth mould inner supporting structure space 10 and outlet of extruder and the door 12 between outlet of extruder simultaneously.
C. step b is repeated.
D. then enter shaping equipment and cooling unit by the hot melting plastic of mouth mould, finally arrive cutter sweep.
As shown in Figure 7 and Figure 8, cross mouth mould is divided into cross mouth mould pipe shaft space 9 and cross mouth mould inner supporting structure space 10.Cross mouth mould pipe shaft space is annular.Cross mouth mould inner supporting structure space 10 is cross.The junction in pipe shaft space and cross mouth mould inner supporting structure space 10 is provided with the door 11 at cross mouth mould pipe shaft space and inner supporting structure spatial joins place, is also provided with the door 12 between cross mouth mould inner supporting structure space and outlet of extruder between cross mouth mould inner supporting structure space 10 and outlet of extruder.
Claims (5)
1. a weak seam gas pumping inner supporting type guard aperture pipe, is characterized in that: this pipe selects antistatic, fire proofing to make, and pipe internal construction is successively by inner support section and hollow section cycle arrangement; Guard aperture pipe inner support segment length is 15-25cm, and hollow section length is 80-120cm; Described inner support section is herringbone inner supporting structure or cross inner supporting structure; Described hollow section is hollow-core construction, and the pipe shaft of hollow-core construction has sieve aperture.
2. one according to claim 1 is applicable to weak seam gas pumping inner supporting type guard aperture pipe, it is characterized in that: described herringbone inner supporting structure is made up of the supporter that three distribute in hexagonal angle, three supporters intersect at tube hub, end connects with tube wall respectively, supporter is cuboid, thickness is 2 ~ 4mm, and width is equal with bore.
3. one according to claim 1 is applicable to weak seam gas pumping inner supporting type guard aperture pipe, it is characterized in that: described cross inner supporting structure is made up of the supporter that four distribute in 90 ° of angles, four supporters are connected on tube hub, end connects with tube wall respectively, supporter is cuboid, thickness is 4 ~ 6mm, and width is equal with bore.
4. a weak seam gas pumping preparation method for inner supporting type guard aperture pipe, is characterized in that: inner supporting type guard aperture pipe processing technique comprises the following steps:
A. insert in plastic extruder by tubing masterbatch, close pipe shaft space and the door at inner supporting structure spatial joins place, the door between inner supporting structure space and extruder, masterbatch is heated to hot melt state and is squeezed in the middle of mouthful mould pipe shaft space afterwards;
B. when after hot melting plastic flow export mould certain length, open pipe shaft space and the door at inner supporting structure spatial joins place and the door between inner supporting structure space and outlet of extruder simultaneously, make hot melting plastic flow into pipe shaft space and the inner supporting structure space of mouthful mould simultaneously, when after hot melting plastic flow export mould certain length, close pipe shaft space and the door at inner supporting structure spatial joins place and the door between inner supporting structure space and outlet of extruder simultaneously;
C. step b is repeated;
D. then enter shaping equipment and cooling unit by the hot melting plastic of mouth mould, finally arrive cutter sweep.
5. the preparation method of weak seam gas pumping inner supporting type guard aperture pipe according to claim 4, it is characterized in that: described mouth mould is divided into pipe shaft space and inner supporting structure space, pipe shaft space is annular, inner supporting structure space is herringbone or cross, the junction in pipe shaft space and inner supporting structure space is provided with door, is also provided with door between inner supporting structure space and outlet of extruder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129441.1A CN103850699B (en) | 2014-04-02 | 2014-04-02 | A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129441.1A CN103850699B (en) | 2014-04-02 | 2014-04-02 | A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103850699A CN103850699A (en) | 2014-06-11 |
| CN103850699B true CN103850699B (en) | 2016-04-13 |
Family
ID=50858792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410129441.1A Active CN103850699B (en) | 2014-04-02 | 2014-04-02 | A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103850699B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234660B (en) * | 2014-09-03 | 2017-02-01 | 安徽理工大学 | Filling method for gas extraction hole |
| CN104612748A (en) * | 2015-02-04 | 2015-05-13 | 张丽军 | Coal-mass gas extraction method and device |
| CN107905833B (en) * | 2017-12-04 | 2023-09-12 | 贵州大学 | Anti-burst gas drainage pipe structure and installation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4108256A (en) * | 1977-05-12 | 1978-08-22 | Continental Oil Company | Sliding stabilizer assembly |
| CN102587961A (en) * | 2012-04-10 | 2012-07-18 | 中国矿业大学 | Feeding method and device for hole protecting pipe for soft coal seam gas extraction hole |
| CN102747953A (en) * | 2012-03-06 | 2012-10-24 | 中国矿业大学 | Multiple step type drilling and protecting integrated system and process for soft coal seam |
| CN103195471A (en) * | 2013-04-22 | 2013-07-10 | 中国矿业大学 | Method for preventing drilling collapse of downhole coal bed |
| CN203441525U (en) * | 2013-05-06 | 2014-02-19 | 中国平煤神马能源化工集团有限责任公司天成实业分公司 | Support type special pipe for gas drainage |
-
2014
- 2014-04-02 CN CN201410129441.1A patent/CN103850699B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4108256A (en) * | 1977-05-12 | 1978-08-22 | Continental Oil Company | Sliding stabilizer assembly |
| CN102747953A (en) * | 2012-03-06 | 2012-10-24 | 中国矿业大学 | Multiple step type drilling and protecting integrated system and process for soft coal seam |
| CN102587961A (en) * | 2012-04-10 | 2012-07-18 | 中国矿业大学 | Feeding method and device for hole protecting pipe for soft coal seam gas extraction hole |
| CN103195471A (en) * | 2013-04-22 | 2013-07-10 | 中国矿业大学 | Method for preventing drilling collapse of downhole coal bed |
| CN203441525U (en) * | 2013-05-06 | 2014-02-19 | 中国平煤神马能源化工集团有限责任公司天成实业分公司 | Support type special pipe for gas drainage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103850699A (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103195471A (en) | Method for preventing drilling collapse of downhole coal bed | |
| CN103850699B (en) | A kind of weak seam gas pumping inner supporting type guard aperture pipe and preparation method | |
| CN204041030U (en) | With the horizontal well in segments completion tubular column of the close screen casing of variable orifice | |
| CN104314566B (en) | Coal mining method for inclined cutting and subsection top coal caving of steep coal seam | |
| CN103556940B (en) | Binary channels porous turbulent flow release drilling tool and construction method thereof is crept into for cherry coal rock | |
| CN102747953B (en) | Multiple step type drilling and protecting integrated system and process for soft coal seam | |
| CN203584298U (en) | Soft coal rock drilling dual-channel porous turbulent pressure relief drill | |
| CN106481297B (en) | A kind of vortex tube heat preservation Sampling driller | |
| CN105115371A (en) | Split type wedge cut | |
| CN204984280U (en) | Novel sealed drilling rod | |
| CN103233694A (en) | Method for descending and suspending production casing for mining area ground coal-bed gas well and casing device | |
| CN203334965U (en) | Drill bit suitable for forming holes in earth surface with loose soil texture | |
| CN205936408U (en) | Toper anti -sticking bores drill bit | |
| CN206233870U (en) | A kind of disposable setting of casing reducer union | |
| CN104033665B (en) | A kind of mining high-strength non-magnetic metal composite pipe and preparation method thereof | |
| CN204827505U (en) | Mine ventilation system | |
| CN205330556U (en) | Soft coal creeps into on layer open bionical falling of multiple wing indent and hinders guard aperture drilling rod | |
| CN204571847U (en) | The squeezed screw thread drilling tool of a kind of reducing | |
| CN203559771U (en) | Piling drilling tool | |
| CN103541679A (en) | Method for sealing underground hydraulic fracture drilled hole of coal mine in combined manner | |
| CN103878871B (en) | A kind of prefabricated pipeline preformed hole cutter | |
| CN204042218U (en) | A kind of mining high-strength non-magnetic metal composite pipe | |
| CN202745730U (en) | hydraulic centralizer | |
| CN202483448U (en) | Centering rock bit | |
| CN103321579B (en) | Multi-claw drill suitable for loosening earth surface soil texture formed holes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |