CN107806328A - A kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe - Google Patents
A kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe Download PDFInfo
- Publication number
- CN107806328A CN107806328A CN201711001832.5A CN201711001832A CN107806328A CN 107806328 A CN107806328 A CN 107806328A CN 201711001832 A CN201711001832 A CN 201711001832A CN 107806328 A CN107806328 A CN 107806328A
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- casing
- hole section
- sleeve pipe
- rock stratum
- well bore
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 63
- 238000000605 extraction Methods 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 51
- 239000011435 rock Substances 0.000 claims abstract description 41
- 238000010276 construction Methods 0.000 claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000011083 cement mortar Substances 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000003063 flame retardant Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 24
- 238000005065 mining Methods 0.000 abstract description 8
- 239000003245 coal Substances 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 23
- 238000005086 pumping Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe, three sections are divided into：Top layer hole section, rock stratum hole section and release extraction hole section.The production casing of setting runs through whole well bore, and its epimere 15 40m is rigid casing, and remaining bottom is metal flexible sleeve pipe；Metal flexible sleeve pipe is divided into three layers, and outer layer is metal net cover, and intermediate layer is metal bellows, and internal layer is rubber hose.When relative motion occurs for adjacent strata, metal flexible sleeve pipe can occur bending and deformation with rock stratum relative motion, disrumpent feelings probability is sheared so as to unload shear force and reduce it, drilling well production casing shears disrumpent feelings problem caused by solving coal seam high tension coal mining, realizes the long-term extraction of drilling well.The drilled well bore structure construction is convenient, simple in construction, easy to spread.
Description
Technical field：
The present invention relates to a kind of casing programme, especially a kind of ground drilling well bore knot suitable for flexible pipe mash gas extraction
Structure, belong to gas pumping technical field.
Technical background：
Gas pumping is the fundamental measure for preventing and treating Gas Disaster.In all pumping methods, ground vertical drilling is (referred to as
" ground drilling ") it is that gas pressure relief method is adopted in a kind of extremely efficient extraction, its extraction flow is big, concentration is high, exists at present
National many highly gas mining areas are widely applied.In ground drilling work progress, in order to avoid being influenceed just because of cave-in
Often drilling, it is necessary to set well cementing casing pipe to protect wellhole paragraph by paragraph；The release extraction hole section open-hole completion of drilling well, afterwards in release extraction
Hole section or whole well bore set production casing.During drilling well extraction, gas pressure relief is adopted under extraction suction function by release extraction
Hole section enters production casing, then flows to ground by production casing.And in coal-face exploitation process, because overlying is adjacent
The relative changing of the relative positions occurs for rock stratum, can cause well cementing casing pipe and production casing that detrusion occurs along interlayer interface (i.e. " shear surface ")
It is or disrumpent feelings.Detrusion (disrumpent feelings) is deformation (disrumpent feelings) form that sleeve pipe occurs most frequently and probability of happening is maximum.
Detrusion (disrumpent feelings) once occurs for production casing, and the sleeve pipe of shear surface both sides there are the relative changing of the relative positions, therefore meeting
Cause the size and Orientation of the zone gas flow velocity that unexpected, violent change occurs, produce huge air-flow local resistance, make
The rise of extraction negative pressure, extraction flow are greatly lowered.In addition, in the disrumpent feelings region of production casing, the chip of rock stratum, the water in water-bearing layer
Stream etc. can be flowed into production casing by the fracture of sleeve pipe, also reduce the smoothness of production casing.It follows that as gas
The necessary channel on ground is flowed to by underground, detrusion (disrumpent feelings), which occurs, for production casing will have a strong impact on that drilling well gas pumping is imitated
Fruit.It then becomes necessary to take the degree of necessary technical measures reduction production casing detrusion and its generation shearing disrumpent feelings
Probability, to ensure the gas pumping effect of ground drilling.
Patent No. " a kind of ground bored well body structure for gas pumping described in ZL 200910066132.3 ",
Its internal production casing set integrally uses rigid casing, and production casing runs through whole casing programme, top be located at ground with
On, bilayer sleeve is formed between production casing and well cementing casing pipe and adds the overall intensity of drilled well bore；Production casing and well cementation
Stayed between sleeve pipe at regular intervals.When the relative changing of the relative positions occurs between rock stratum, due to the presence of spacing, production casing can realize one
Fixed flexural deformation, so as to slow down the destroyed process of production casing, extend the service life of drilling well for gas drainage.So
And under the conditions of high tension coal mining, the relative changing of the relative positions amount between rock stratum can be bigger, and the rock stratum of the changing of the relative positions and well cementing casing pipe are inherently right
Internal production casing produces shear action, because the production casing of drilling well is using rigid pipes such as petroleum casing pipe, seamless steel pipes
Material, its amount of deflection in subrange is small, and extremely weak in stress condition down cut deformability, that is, less detrusion occurs just
It can shear disrumpent feelings, therefore, production casing has a strong impact on gas also it occur frequently that shearing is disrumpent feelings under the conditions of high tension coal mining
Extracting result, and cause the increase of extraction cost.Although set can be reduced using the method for increase drilled well bore and casing diameter
Pipe detrusion or the disrumpent feelings influence to gas pumping, but this method will increase considerably the construction cost of drilling well, and improve
The difficulty of construction of drilling well, it have impact on its popularization and application.
The content of the invention
Technical problem：The invention aims to overcome weak point of the prior art, there is provided a kind of simple in construction, behaviour
Make convenient, the ground gas extraction drilled well bore structure provided with flexible production sleeve pipe of the flexible deformation of production casing.
Technical scheme：The present invention is provided with the ground gas extraction drilled well bore structure of flexible production sleeve pipe, including from ground
Construct top layer hole section H1, the rock stratum hole section H2 and release extraction hole section H3 being sequentially reduced to the aperture of mining induced fissure band, top layer hole
The surface pipe and rock stratum sleeve pipe reinforced with cement mortar, top layer hole section H1, formation pore are respectively equipped with section H1 and rock stratum hole section H2
Be provided with production casing in section H2 and release extraction hole section H3, production casing and rock stratum sleeve pipe and release extraction hole section the H3 borehole wall it
Between leave gap；The production casing is made up of rigid casing and the flexible metal casing being fixedly connected with rigid casing；It is described
Rigid casing be located at top layer hole section H1 epimere, the flexible metal casing upper end is fixedly connected with rigid casing, lower end position
In release extraction hole section H3 bottom, sieve aperture is provided with the flexible metal casing in release extraction hole section H3；Rock stratum covers
Polyurethane reinforcement material is filled with gap between pipe and rigid casing.
Described flexible metal casing is divided into three layers, and outer layer is metal net cover, intermediate layer is metal bellows, internal layer is
The rubber hose of anti-electrostatic fire retardant.
The spacing of described production casing and rock stratum sleeve pipe, the release extraction hole section H3 boreholes wall is not less than outside flexible metal casing
The 1/5 of footpath.
Described rigid enclosure pipe range 15-40m, external screw thread is provided with the outer wall of the rigid casing in the hole section H1 of top layer；
With being provided with internal thread on the inwall of the rock stratum sleeve pipe of rigid casing intersection.
Beneficial effect：After adopting the above technical scheme, the relative changing of the relative positions of stope overlying adjacent strata causes flexible metal to cover
When pipe starts to bear shear force, the flexible metal casing in subrange can occur bending and deformation therewith, generally " S " type
Deformation, the shear force of well bore country rock and rock stratum sleeve pipe to flexible metal casing has on the one hand been unloaded substantially, farthest
Avoiding production casing from occurring, shearing is disrumpent feelings, on the other hand maintains the integrality and continuity of production casing again, makes the relative changing of the relative positions
The change in regional production sleeve pipe direction is relatively slow, avoid the region gas air-flow size and Orientation occur it is unexpected, violent
Change, considerably reduces the local resistance of Gas Flow, therefore at utmost reduces drilled well bore deformation to drilling well gas
The influence of extracting result.The technical program can increase substantially the stability of drilled well bore under the conditions of the high tension coal mining of coal seam,
Both extended effective service life of ground drilling, turn avoid well bore it is disrumpent feelings caused by economic loss；This casing programme is constructed
It is convenient, simple in construction, there is wide applicability.
Brief description of the drawings：
Fig. 1 is the drilled well bore structural representation of the present invention；
Fig. 2 is local A mplifying structure schematic diagrams in Fig. 1；
Fig. 3 is flexible metal casing structural representation.
In figure：Ground 1, surface pipe 2, rock stratum sleeve pipe 3, cement mortar 4, production casing 5, sieve aperture 6, metal net cover 7, metal
Bellows 8, rubber hose 9, polyurethane reinforcement material 11, mining induced fissure band 12, working seam 13, top layer hole section H1, formation pore
Section H2, release extraction hole section H3, rigid casing 5-1, flexible metal casing 5-2, external screw thread 10-1, internal thread 10-2.
Embodiment：
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings：
As shown in figure 1, the present invention is provided with the ground gas extraction drilled well bore structure of flexible production sleeve pipe, whole drilling well
Well bore is divided into three sections be sequentially reduced from ground 1 to the aperture of mining induced fissure band 12：Top layer hole section H1, rock stratum hole section H2 and release
Extraction hole section H3.The surface pipe 2 reinforced with cement mortar 4, rock stratum hole section H2 and top layer hole section H1 are provided with the hole section H1 of top layer
Inside it is provided with the rock stratum sleeve pipe 3 reinforced with cement mortar 4；Epimere when surface pipe 2 and rock stratum section sleeve pipe 3 can prevent drilling construction
The borehole wall collapse hole of well bore and influence normally to creep into；Release extraction hole section H3 open-hole completions.
Production casing 5 is provided with top layer hole section H1, rock stratum hole section H2 and release extraction hole section H3, production casing 5 is by rigidity
Sleeve pipe 5-1 and flexible metal casing 5-2 compositions.Rigid casing 5-1 is located at top layer hole section H1 epimere, and its upper port is above the ground level
1 about 0.2-1m, and be connected with extraction system, its lower end is fixedly connected with flexible metal casing 5-2；Flexible metal casing 5-2
Lower end be located at release extraction hole section H3 bottom.Through the production casing 5 of whole well bore, its overwhelming majority covers for flexible metal
Pipe 5-2；Phase occurs because flexible metal casing 5-2 crooked deformabilities are extremely strong, therefore in adjacent strata and disrumpent feelings well cementing casing pipe
When producing shear action to it to the changing of the relative positions, in relative changing of the relative positions region " S " type flexural deformation can occur for flexible metal casing 5-2,
Because flexural deformation can unload shear action, therefore it is disrumpent feelings farthest to avoid production casing 5 that shearing occurs.
Flexible metal casing 5-2 is made up of three-decker, and outer layer is metal net cover 7, intermediate layer is metal bellows 8, interior
Layer is rubber hose 9；Metal bellows 8 is flexible metal casing 5-2 main body, and it is in resistance to compression and shearing resistance with rigid tubing
On the basis of mechanical property, also there is the stronger performance such as irregular curved, flexible, therefore it may be implemented in adjacent strata and breaks
Disconnected well cementing casing pipe reduces production casing 5 and occurs to shear disrumpent feelings probability with respect to the flexible deformation of production casing under the conditions of the changing of the relative positions 5.
The metal net cover 7 of the outer layer of metal bellows 8, can further improve the performances such as flexible metal casing 5-2 resistance to compression and shearing resistance.Metal
The interior sidewall surface of bellows 8 is lumpy surface, if therefore can produce larger rub during as Gas Flow passage
Resistance is wiped, therefore sets the smooth rubber hose 9 of wall to be used as Gas Flow passage inside metal bellows 8, reduces gas
Flow resistance.Further, metal net cover 7 and rubber hose 9 are respectively provided with larger crooking ability, can be with metal bellows 8
Synchronously occur bending and deformation.In addition, flexible metal casing 5-2 three-decker, can also realize that the multilayer of production casing 5 is protected
Shield.
Preferably, rubber hose 9 selects antistatic, anti-flammability elastomeric material, prevents when gas from flowing wherein because of production
Give birth to electrostatic spark and set off an explosion.
Production casing 5 and rock stratum sleeve pipe 3, release extraction hole section H3 the borehole wall between leave gap, the spacing is not less than soft
Property metal sleeve 5-2 external diameters 1/5, be flexible metal casing 5-2 occur " S " type flexural deformation important space, ensure that it holds
By being capable of normal deformation during shear force；In addition, the relative changing of the relative positions pair of the spacing or adjacent strata and disrumpent feelings well cementing casing pipe
Production casing 5 produces the cushion space of shear action, can weaken influence of the rock movement to production casing 5, and it is stable to improve well bore
Property.
The long 15-40m of rigid casing 5-1, it, which is located on the outer wall of the pipeline section in the hole section H1 of top layer, is provided with external screw thread 10-1, with
The inwall of the rock stratum sleeve pipe 3 of rigid casing 5-1 intersections is provided with internal thread 10-2；Internal thread 10-2 and external screw thread 10-1 it
Between gap be filled with polyurethane reinforcement material 11.After polyurethane reinforcement material 11 solidifies, by rigid casing 5-1 and rock stratum sleeve pipe
3 are consolidated, and the epimere of production casing 5 is fixed with this, ensure that the stability in ground drilling well head region.Internal thread 10-2
And external screw thread 10-1 adds the frictional force between polyurethane reinforcement material 11 and rigid casing 5-1, rock stratum sleeve pipe 3, improves
The effect of consolidation.
Sieve aperture 6 is provided with the flexible metal casing 5-2 in release extraction hole section H3, makes gas pressure relief both can be
Flexible metal casing 5-2 lower port enters production casing 5, can enter production casing 5 by sieve aperture 6 again, improve release
Gas enters the efficiency of production casing 5.
The construction method of the above-mentioned ground gas extraction drilled well bore structure provided with flexible production sleeve pipe：
(1) drilling engineering
Top layer hole section H1：Creep into from ground 1 to the direction of working seam 13, with top layer drill perforate, creep into topsoil
Stop boring after the basement rock 10m of bottom, tripping in surface pipe 2, then with the sealing surface pipe 2 of cement mortar 4；
Rock stratum hole section H2：Change rock stratum drill and creep into the position away from 90~100m of roof and stop boring, tripping in rock stratum set
Pipe 3, the about 0.2-1m of cannula tip above ground level 1, is then cemented the well with cement mortar 4；Wherein the epimere of rock stratum sleeve pipe 3 is about 39m pipe
The internal face of section is provided with internal thread 10-2；
Release extraction hole section H3：Extraction drill is changed to creep into the position finishing drilling away from roof 15m；
(2) Well Completion Engineering of Oil Reservoirs
After the completion of drilling engineering, tripping in production casing 5, its middle and upper part 40m part is rigid casing 5-2, bottom to well
The all flexible metal casing 5-1 in bottom；In addition, the outside wall surface for the pipeline section that rigid casing 5-1 hypomeres are about 39m is provided with external screw thread
10-1, the pipeline section that flexible metal casing 5-1 hypomeres are about 80m are provided with sieve aperture 6.After tripping in production casing 5, in rigid casing 5-
Filled polyurethane reinforcement material 11 in gap between 2 and rock stratum sleeve pipe 3.
Its course of work is：After the completion of the wellbore construction of ground, upper port and the ground extraction system phase of production casing 5
Even；After the working face of working seam 13 pushes through drilling well 10m, startup gas pumping pump starts extraction and adopts gas pressure relief.
Claims (4)
1. a kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe, including from ground（1）Construction is to adopting
Fissure zone（12）Aperture the top layer hole section H1, the rock stratum hole section H2 that are sequentially reduced and release extraction hole section H3, top layer hole section H1 with
It is respectively equipped with the hole section H2 of rock stratum and uses cement mortar（4）The surface pipe of reinforcing（2）With rock stratum sleeve pipe（3）, top layer hole section H1, rock stratum
Production casing is provided with hole section H2 and release extraction hole section H3（5）, production casing（5）With rock stratum sleeve pipe（3）With release drainage holes
Gap is left between the section H3 borehole wall；It is characterized in that：The production casing（5）By rigid casing（5-1）With with rigid casing
（5-1）The flexible metal casing being fixedly connected（5-2）Composition；Described rigid casing（5-1）Positioned at top layer hole section H1 epimere,
The flexible metal casing（5-2）Upper end and rigid casing（5-1）It is fixedly connected, lower end is located at release extraction hole section H3 bottom
Portion, the flexible metal casing in release extraction hole section H3（5-2）On be provided with sieve aperture（6）；Rock stratum sleeve pipe（3）With rigid enclosure
Pipe（5-1）Between gap in be filled with polyurethane reinforcement material（11）.
2. a kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe according to claim 1, it is special
Sign is：Described flexible metal casing（5-2）Three layers are divided into, outer layer is metal net cover（7）, intermediate layer be metal bellows
（8）, internal layer be anti-electrostatic fire retardant rubber hose（9）.
3. a kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe according to claim 1, it is special
Sign is：Described production casing（5）With rock stratum sleeve pipe（3）, the release extraction hole section H3 boreholes wall spacing be not less than flexible metal
Sleeve pipe（5-2）The 1/5 of external diameter.
4. a kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe according to claim 1, it is special
Sign is：Described rigid casing（5-1）Long 15-40m, the rigid casing in the hole section H1 of top layer（5-1）Outer wall on open
There is external screw thread（10-1）；With rigid casing（5-1）The rock stratum sleeve pipe of intersection（3）Inwall on be provided with internal thread（10-2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711001832.5A CN107806328A (en) | 2017-10-24 | 2017-10-24 | A kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711001832.5A CN107806328A (en) | 2017-10-24 | 2017-10-24 | A kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107806328A true CN107806328A (en) | 2018-03-16 |
Family
ID=61585432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711001832.5A Pending CN107806328A (en) | 2017-10-24 | 2017-10-24 | A kind of ground gas extraction drilled well bore structure provided with flexible production sleeve pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN107806328A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293926A (en) * | 2022-01-12 | 2022-04-08 | 淮北工业建筑设计院有限责任公司 | Anti-breaking well protection pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649740A (en) * | 2009-09-03 | 2010-02-17 | 周福宝 | Ground bored well body structure for gas extraction |
| CN201924897U (en) * | 2011-02-14 | 2011-08-10 | 中国矿业大学 | Well bore structure of pressure-relief coal bed methane ground extraction well |
| CN203384534U (en) * | 2013-08-13 | 2014-01-08 | 中煤科工集团重庆研究院 | Self-adaption flexible ground well casing protective device |
| CN103953386A (en) * | 2014-03-12 | 2014-07-30 | 淮北矿业（集团）勘探工程有限责任公司 | Upstream-blocking and downstream-seepage method for extracting gas in mining area |
-
2017
- 2017-10-24 CN CN201711001832.5A patent/CN107806328A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649740A (en) * | 2009-09-03 | 2010-02-17 | 周福宝 | Ground bored well body structure for gas extraction |
| CN201924897U (en) * | 2011-02-14 | 2011-08-10 | 中国矿业大学 | Well bore structure of pressure-relief coal bed methane ground extraction well |
| CN203384534U (en) * | 2013-08-13 | 2014-01-08 | 中煤科工集团重庆研究院 | Self-adaption flexible ground well casing protective device |
| CN103953386A (en) * | 2014-03-12 | 2014-07-30 | 淮北矿业（集团）勘探工程有限责任公司 | Upstream-blocking and downstream-seepage method for extracting gas in mining area |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293926A (en) * | 2022-01-12 | 2022-04-08 | 淮北工业建筑设计院有限责任公司 | Anti-breaking well protection pipe |
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Application publication date: 20180316 |