CN108979559A - A kind of steel bushing pipe connection - Google Patents
A kind of steel bushing pipe connection Download PDFInfo
- Publication number
- CN108979559A CN108979559A CN201811100741.1A CN201811100741A CN108979559A CN 108979559 A CN108979559 A CN 108979559A CN 201811100741 A CN201811100741 A CN 201811100741A CN 108979559 A CN108979559 A CN 108979559A
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- Prior art keywords
- steel
- section
- prepackage
- steel sleeve
- bushing pipe
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- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 105
- 239000010959 steel Substances 0.000 title claims abstract description 105
- 238000005260 corrosion Methods 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 abstract description 50
- 238000009413 insulation Methods 0.000 abstract description 18
- 239000011241 protective layer Substances 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 7
- 230000011218 segmentation Effects 0.000 abstract description 5
- 230000032258 transport Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 230000006872 improvement Effects 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 230000003628 erosive effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003260 anti-sepsis Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241001236644 Lavinia Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004804 winding Methods 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
-
- 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
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
-
- 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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1042—Elastomer protector or centering means
-
- 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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of steel bushing pipe connections; including steel sleeve, prepackage shrink wrap layer, prepackage PE pipe, casing joints, now fill shrink wrap layer and now dress PE pipe; the prepackage shrink wrap layer, prepackage PE pipe are pre-installed on steel sleeve; and the now dress shrink wrap layer and now dress PE pipe only remain small part vacancy after steel sleeve transports scene to and are installed; the set-up time that heatproof insulating protective layer can largely be saved, meet deep well grounding electrode steel sleeve segmentation decentralization installation and heatproof, insulation, anti-corrosion, sealing, to medium multi-functional.
Description
Technical field
The present invention relates to DC transmission engineering grounding technology fields, more particularly to a kind of steel bushing pipe connection.
Background technique
Important component of the direct current grounding pole as DC transmission engineering, now common land earthing pole technology has level
Earthing pole and two kinds of vertical grounding electrode.That there are occupied areas is larger for existing earthing pole, addressing is difficult, to pole location periphery shallow-layer ring
Border influences the disadvantages of big.Deep well grounding electrode technology can effectively evade the above problem, but deep-well presence drilling buried depth is too big, aperture
Too small, the problems such as drilling well easy collapse hole and insulating segment seal protection difficulty is big.It is subsequent electrical after the completion of deep-well drilling in order to guarantee
The normal decentralization of equipment installation, needs that steel sleeve retaining wall will be transferred, in order to which DC current is introduced deeper formation by feed rod,
Ground diffusing is prevented, and steel sleeve and the earth stratum are direct contact layer, are not only needed in feed rod and steel sleeve using insulation
Material filling, while needing to set insulating segment for steel sleeve top；DC current during feed system by that can produce simultaneously
Raw lasting temperature rise variation, in order to prevent temperature rise variation influence insulation effect, need that insulation heatproof is arranged in steel sleeve outer wall layer
Layer, due to steel sleeve be segmentation decentralization, on the outside of insulating layer be segmented connection when need to configure seal protecting device so that absolutely
Rim segment segmentation tie point can guarantee the resistance to temp effect that normally insulate under external force；It can be produced in steel sleeve decentralization process with the borehole wall
Raw frictionally damage, it is therefore desirable to take forced centering measure, insulation heat-resistant layer is prevented to be scraped off abrasion.
Casing protection device is usually used in drilling well or recovery process in petroleum, colliery engineering field, mainly protection sleeve pipe
Impaired to destroy, existing temperature insulation layer or its major protective function of casing protection device are single, and often producer is fabricated to
Finished product is disposable.Since deep-well buried depth is larger in deep well grounding electrode, the needs segmentation decentralization installation of steel sleeve, therefore need
A kind of heatproof insulation measures that can be suitably used for substep and install are wanted, there are enough seal protecting devices at tie point.Simultaneously in depth
In well earthing pole, steel sleeve protective layer must be provided with preventing protective layer from boring in decentralization process middle detent in decentralization process
Borehole wall wears the scratch of protective layer.
To sum up, in deep well grounding electrode experimental project, deep-well insulating segment, which is designed, a kind of can make steel sleeve heatproof exhausted
The safeguard measure of edge, while steel sleeve substep can be suitable for and transferred, so that having when the connection of steel sleeve temperature insulation layer enough
Centering measure is sealed, deep well grounding electrode is installed, engineering roadblock is broken through and is of great significance.
Summary of the invention
Based on this, the object of the present invention is to provide a kind of steel for being applicable in deep well grounding electrode steel sleeve heatproof insulation protection
Casing connection device, the effects of can installing when steel sleeve substep is transferred, play anti-corrosion, heatproof, insulation, sealing, centering.
A kind of steel bushing pipe connection, comprising:
Steel sleeve, including at least two sections head and the tail connection the steel sleeve, each steel sleeve be divided into prepackage section and
Linkage section, the prepackage section are steel sleeve middle section part, and the linkage section is the both ends for pre-installing section to steel sleeve two
The part of end；
Shrink wrap layer is pre-installed, is wrapped in outside the prepackage section；
PE pipe is pre-installed, is set in outside the prepackage shrink wrap layer；
Casing joints are fixed by described sleeve pipe connector between the linkage section of steel sleeve described in every two section；
Shrink wrap layer is now filled, is wrapped in outside the linkage section；
Now dress PE pipe is set in outside the now dress shrink wrap layer.
It further include waterproof layer as the further improvement of above-mentioned steel bushing pipe connection, the waterproof layer wraps up the set
Outside pipe connections.
It further include centralizer as the further improvement of above-mentioned steel bushing pipe connection, the company of steel sleeve described in every two section
The place of connecing is arranged with the centralizer.
It further include annular fixing member as the further improvement of above-mentioned steel bushing pipe connection, the annular fixing member set
It is located at outside the prepackage PE pipe, now dress PE manages the both ends of the outer or described centralizer.
As the further improvement of above-mentioned steel bushing pipe connection, the centralizer is elastic centralizer, including more bullets
Property righting strip, it is described elasticity righting strip be placed equidistant with along the circumference of the steel sleeve.
As the further improvement of above-mentioned steel bushing pipe connection, the length of the centralizer is covered not less than the waterproof layer
The length of lid.
As the further improvement of above-mentioned steel bushing pipe connection, described sleeve pipe connector is casing coupling.
As the further improvement of above-mentioned steel bushing pipe connection, the annular fixing member is ring-shaped clip.
As the further improvement of above-mentioned steel bushing pipe connection, the steel bushing pipe outer wall is also coated with erosion resistant coating.
As the further improvement of above-mentioned steel bushing pipe connection, the outer diameter of the centralizer is less than borehole wall ID.
Compared with the prior art, steel bushing pipe connection of the present invention at least has the following technical effect that
1, the prepackage end of the steel sleeve is enclosed with shrink wrap layer and PE pipe in advance, only remains linkage section part after transporting scene to
Vacancy carries out the installation of insulating protective layer, can largely save the set-up time of heatproof insulating protective layer.
2, the waterproof layer is arranged by the junction of steel sleeve, reaches better seal and waterproof action.
3, in the junction of steel sleeve, setting centralizer plays the role of forced centering.
4, the annular fixing member can fix the PE pipe, shrink wrap layer and centralizer.
5, the erosion resistant coating can play good antisepsis to steel sleeve.
In order to better understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of steel bushing pipe connection of the present invention.
Specific embodiment
It, can be the present invention provides a kind of steel bushing pipe connection for being applicable in deep well grounding electrode steel sleeve heatproof insulation protection
The effects of steel sleeve substep is installed when transferring, plays anti-corrosion, heatproof, insulation, sealing, centering.
Referring now to attached drawing hereinafter, the present invention is described in more detail below, shows the embodiment of the present invention in the figure.
However, the present invention can be presented as many different forms, and it should not be construed as being limited to specific embodiment presented herein.
Exactly, these embodiments are for conveying the scope of the invention to those skilled in the art.
Unless otherwise defined, otherwise, term (including technical and scientific terms) used herein is interpreted as
With the identical meaning of the meaning that is generally understood with the technical staff in field belonging to the present invention.Also, it is to be understood that
Term used herein be interpreted as having with the consistent meaning of meaning in this specification and related fields, and do not answer
It is explained by ideal or excessively formal meaning, unless being clearly specified that herein.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
As shown in FIG. 1, FIG. 1 is the structural schematic diagrams of steel bushing pipe connection of the present invention.
A kind of steel bushing pipe connection, including steel sleeve 1, prepackage shrink wrap layer 2, prepackage PE pipe 3, casing joints 4, now fill
Shrink wrap layer 5 and now dress PE pipe 6, the prepackage shrink wrap layer 2, prepackage PE pipe 3 are pre-installed on steel sleeve 1, and the existing dress heat
Contracting layer 5 and now dress PE pipe 6 only remain small part vacancy after steel sleeve 1 transports scene to and are installed, and it is exhausted can largely to save heatproof
The set-up time of edge protective layer.
Each component part of the present embodiment steel bushing pipe connection is described in detail individually below.
Steel sleeve 1 can protect the electrical equipment in steel sleeve 1 for the protection and support member transferred in well, packet
The steel sleeve 1 of at least two sections head and the tail connection is included, each steel sleeve 1 is divided into prepackage section and linkage section, the prepackage
Section is steel sleeve middle section part, and the linkage section is the both ends of the prepackage section to the part of 1 liang of end of steel sleeve.Specifically
About 1m is left a blank as linkage section, for being lifted and being connected in ground, the both ends of every section steel sleeve 1.
Shrink wrap layer 2 is pre-installed, is wrapped in outside the prepackage section, plays the role of insulated enclosure.Specifically, the prepackage shrink wrap layer
For heat-shrink tube, in steel sleeve 1 also in factory when be pre-installed in steel sleeve 1 prepackage section on.In the present embodiment, the heat
The diameter of the draw is not less than 400mm, and thickness is not less than 1.5mm, and high-voltage resistance capability is greater than 1kV, and water pressure resistance is greater than 4MPa, and heatproof is not
Less than 100 DEG C.
PE pipe 3 is pre-installed, is set in outside the prepackage shrink wrap layer 2, it is generally identical as the prepackage length of section, in steel sleeve
1 is also pre-installed in the prepackage section of steel sleeve 1 when factory, plays the role of protection and heat preservation.In the present embodiment,
3 internal diameter diameter of PE pipe is pre-installed slightly larger than prepackage shrink wrap layer diameter 1-3mm, pipe thickness is not less than 10mm.
Preferably, it before including the prepackage shrink wrap layer 2, is derusted to the prepackage section outer wall of steel sleeve 1, cleaner
Make, guarantee that casing outer layer is bright and clean, and smear erosion resistant coating, in the present embodiment, the erosion resistant coating is epoxy primer.
Casing joints 4, it is fixed by described sleeve pipe connector 4 between the linkage section of steel sleeve 1 described in every two section.Tool
Body, described sleeve pipe connector 4 is that casing coupling, by upper and lower two sections steel sleeve, 1 centering, is connect when lifting is installed using the casing
Hoop carries out affixed connection, this hitches the both ends of box cupling using screwed connection.The casing joints 4 play fixed and sealing simultaneously and make
With.
Preferably, it after steel sleeve 1 connects, also needs to carry out polishing derusting to the linkage section of steel sleeve 1, then smear anti-
Rotten layer, in the present embodiment, the erosion resistant coating are epoxy primer.
Shrink wrap layer 5 is now filled, is wrapped in outside the linkage section, plays the insulation to linkage section and sealing function.Specifically, should
Now dress shrink wrap layer 5 is pyrocondensation belt, after the connection of two section steel sleeves 1, wraps up the pyrocondensation belt to corresponding linkage section.In the present embodiment
In, which is not less than 1.5mm, and thickness is not less than 250mm, and high-voltage resistance capability is greater than 1kV, and water-resistant pressure is greater than
4MPa, heatproof are not less than 100 DEG C.
PE pipe 6 is now filled, is set in outside the now dress shrink wrap layer 5, plays protection and insulation effect.In the present embodiment, existing
It fills 6 internal diameter diameter of PE pipe and is not less than 10mm slightly larger than shrink wrap layer diameter 1-3mm, pipe thickness is now filled.
It further include waterproof layer 7 as preferred embodiment, outside the waterproof layer package described sleeve pipe connector 4.Specifically
Ground, the waterproof layer 7 are adhesive waterproof tape, and before wrapping up the now dress shrink wrap layer 5, marine glue is used outside described sleeve pipe connector 4
Band sealing, plays better seal and waterproof action.In the present embodiment, which is not less than 1.5mm, water pressure resistance
Power is greater than 4MPa, and winding width is not less than 30cm.
It further include centralizer 8 as preferred embodiment, the junction of steel sleeve 1 described in every two section is arranged with described
Centralizer 8, specifically, the centralizer 8 are elastic centralizer, including more elastic righting strips, and the elasticity righting strip is along institute
The circumference for stating steel sleeve 1 is placed equidistant with, and further, the length of the centralizer 8 is not less than the length of the waterproof layer 7 covering
Degree.The centralizer 8 plays the role of forced centering.In the present embodiment, the outer diameter of the centralizer 8 is less than borehole wall ID, institute
The length for stating centralizer 8 is not less than the length 15-20cm of the waterproof layer 7 covering, and elastic righting strip is not less than 12, and width is not
Less than 25mm, thickness is not less than 4mm.
It further include annular fixing member 9 as preferred embodiment, the annular fixing member 9 is set in the prepackage PE pipe 2
Outside, outside the PE pipe 6 or both ends of the centralizer are now filled, for fixing shrink wrap layer, PE pipe and centralizer 8.Specifically, the annular
Fixing piece 9 is ring-shaped clip, and diameter is slightly larger than PE pipe diameter 1-4mm, and ring-shaped clip spacing is not less than 30cm, forms annular snap
The connection steel disc of hoop is not less than 4, and width is not less than 25mm, and thickness is not less than 4mm.
Working principle: in steel bushing pipe connection of the present invention, the intermediate stage of the steel sleeve 1, i.e. its prepackage
Section can install in advance insulation protection structure in factory, first coated anti-corrosion layer after outside derusting and cleaning, then hot using the prepackage
Contracting layer 2 and prepackage PE pipe 3 wrap up, and install after transporting building-site to remaining linkage section, it is exhausted can largely to save heatproof
The set-up time of edge protective layer.The heatproof insulation of steel sleeve 1 uses three process simultaneously, and first is erosion resistant coating, in this reality
It applies for epoxy primer in example, great advantage is not only to improve the mechanical performance of coating, additionally it is possible to play good coating shield
Effect has good antisepsis；Second is shrink wrap layer, is in the present embodiment mesospore pipeline heat-shrink tube, great advantage
It is to have the function of high-temperature shrinkage, soft fire-retardant, insulation corrosion protection；Third road is PE pipe, and great advantage is shock resistance, wear-resisting, dual anti-
Significant effect.Sealed when installing at the scene simultaneously using casing coupling and adhesive waterproof tape, outside using epoxy primer, pyrocondensation belt with
And the installation of PE pipe, equally reach heatproof, insulation effect；It is fixed simultaneously in construction section using elastic centralizer and ring-shaped clip
And forced centering.Meet deep well grounding electrode steel sleeve segmentation decentralization installation and heatproof, insulation, anti-corrosion, sealing, to medium more
Weight function.
Compared with the prior art, steel bushing pipe connection of the present invention at least has the following technical effect that
1, the prepackage end of the steel sleeve is enclosed with shrink wrap layer and PE pipe in advance, only remains linkage section part after transporting scene to
Vacancy carries out the installation of insulating protective layer, can largely save the set-up time of heatproof insulating protective layer.
2, the waterproof layer is arranged by the junction of steel sleeve, reaches better seal and waterproof action.
3, in the junction of steel sleeve, setting centralizer plays the role of forced centering.
4, the annular fixing member can fix the PE pipe, shrink wrap layer and centralizer.
5, the erosion resistant coating can play good antisepsis to steel sleeve.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (10)
1. a kind of steel bushing pipe connection characterized by comprising
Steel sleeve, including the steel sleeve that at least two sections head and the tail connect, steel sleeve described in each section is divided into prepackage section and company
Section is connect, the prepackage section is steel sleeve middle section part, and the linkage section is the both ends to two end of steel sleeve of the prepackage section
The part at end；
Shrink wrap layer is pre-installed, is wrapped in outside the prepackage section；
PE pipe is pre-installed, is set in outside the prepackage shrink wrap layer；
Casing joints are fixed by described sleeve pipe connector between the linkage section of steel sleeve described in every two section；
Shrink wrap layer is now filled, is wrapped in outside the linkage section；
Now dress PE pipe is set in outside the now dress shrink wrap layer.
2. steel bushing pipe connection according to claim 1, it is characterised in that: it further include waterproof layer, the waterproof layer packet
It wraps up in outside described sleeve pipe connector.
3. steel bushing pipe connection according to claim 2, it is characterised in that: it further include centralizer, steel described in every two section
The junction of casing is arranged with the centralizer.
4. steel bushing pipe connection according to claim 3, it is characterised in that: it further include annular fixing member, the annular
Fixing piece is set in outside the prepackage PE pipe, now dress PE manages the both ends of the outer or described centralizer.
5. steel bushing pipe connection according to claim 3, it is characterised in that: the centralizer is elastic centralizer, packet
More elastic righting strips are included, the elasticity righting strip is placed equidistant with along the circumference of the steel sleeve.
6. steel bushing pipe connection according to claim 3, it is characterised in that: the length of the centralizer is not less than described
The length of waterproof layer covering.
7. steel bushing pipe connection according to claim 1, it is characterised in that: described sleeve pipe connector is casing coupling.
8. steel bushing pipe connection according to claim 4, it is characterised in that: the annular fixing member is ring-shaped clip.
9. steel bushing pipe connection according to claim 1, it is characterised in that: the steel bushing pipe outer wall is also coated with anti-corrosion
Layer.
10. steel bushing pipe connection according to claim 5, it is characterised in that: the outer diameter of the centralizer is less than the borehole wall
Internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811100741.1A CN108979559A (en) | 2018-09-20 | 2018-09-20 | A kind of steel bushing pipe connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811100741.1A CN108979559A (en) | 2018-09-20 | 2018-09-20 | A kind of steel bushing pipe connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108979559A true CN108979559A (en) | 2018-12-11 |
Family
ID=64545301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811100741.1A Pending CN108979559A (en) | 2018-09-20 | 2018-09-20 | A kind of steel bushing pipe connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108979559A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113669020A (en) * | 2021-08-04 | 2021-11-19 | 深圳宏业基岩土科技股份有限公司 | Rapid up-down butt joint method for steel sleeve |
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|---|---|---|---|---|
| CN113669020A (en) * | 2021-08-04 | 2021-11-19 | 深圳宏业基岩土科技股份有限公司 | Rapid up-down butt joint method for steel sleeve |
| CN113669020B (en) * | 2021-08-04 | 2023-12-08 | 深圳宏业基岩土科技股份有限公司 | Rapid up-down butt joint method for steel sleeve |
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