CN206737840U - Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of - Google Patents
Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of Download PDFInfo
- Publication number
- CN206737840U CN206737840U CN201720504232.XU CN201720504232U CN206737840U CN 206737840 U CN206737840 U CN 206737840U CN 201720504232 U CN201720504232 U CN 201720504232U CN 206737840 U CN206737840 U CN 206737840U
- Authority
- CN
- China
- Prior art keywords
- heat
- oil pipe
- insulating
- oil
- semicircle
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model discloses wrapping up in nano heat-insulating thermal insulation tubing outside one kind, the oil pipe that is made up of the heat-insulated shell of semicircle of two docking at the outer protection tube outside protection band of being shaped outside steel oil pipe, oil pipe outer heat insulation layer, insulating, sizing protection band, tubing coupling join operation section.One layer of insulating is equably wrapped up in the oil pipe interlude oil-pipe external wall, uniformly overlap joint winds insulating sizing protection band outside insulating, and heat-insulation and heat-preservation oil pipe the outer protection tube is provided with outside sizing protection band；Anti- displacement forced seal device is provided with oil pipe interlude both ends；Two semicircle heat-insulated shells docked and trapezoidal O-ring seal are mounted with tubing manipulation section.The utility model can be effectively reduced crude oil and give rise to the loss of well head process Crude Oil own temperature from shaft bottom and improve the fluidised form and wax deposition problem of crude oil in the wellbore, be finally reached energy-saving and emission-reduction, substantially reduce cost of oil production.
Description
Technical field
It the utility model is related to a kind of flow string not serious suitable for oil field machinery oil well rod and tube partial-wear and fief
The outer of lower hot well tubing string wraps up in nano heat-insulating thermal insulation tubing.
Background technology
At present generally mode is spreaded in the actual production process of oil field (not plus any oil pipe using what pure light pipe tubing string recovered the oil
Heat-insulation and heat-preservation measure), it is also by the way of pure light pipe tubing string adopts geothermal water to adopt geothermal water well tubing string, and these recover the oil and adopted
The problem of descending natural heat energy to waste and underuse in large quantities be present in the mode of hot water.Pure light pipe tubing string oil production method is specific
Exist the high crude oil of deep layer position natural temperature by mechanical lift by crude oil lifting arrive well head when, crude oil own temperature largely damages
Lose, make crude oil poor fluidity, wax deposition in the wellbore, cause the increase of oil pumper load, also need to use hot water well-flushing when serious, electricity consumption adds
Heat improves Wellhead crue oil temperature, with adding various chemical viscosity reduction agent, paraffin remover to increase oil recovery production cost come viscosity reduction wax removal, wastes
The heat energy of electric energy and surface gathering system heating furnace.
The content of the invention
The purpose of this utility model, which is to provide outside one kind, wraps up in nano heat-insulating thermal insulation tubing, can be effectively reduced crude oil from shaft bottom
Flow to the temperature loss of well head process Crude Oil itself and improve viscosity, wax deposition, the fluidised form of crude oil in the wellbore, in actual production
Middle realize improves former 15~30 DEG C of Wellhead crue oil temperature, so as to solve thermal well flushing plus various chemoprevention medicaments, electrical heating viscosity reduction,
Reduce oil pumper load, oil well economize on electricity and simplify ground gathering and transportation technology flow, triple-pipe heat tracing be changed to single tube do not heat normal temperature it is defeated
Send, remove the technical problems such as water heater, be really achieved energy-saving and emission-reduction, extra earning synergy, the purpose for substantially reducing cost of oil production.
The technical solution adopted in the utility model is as follows：
Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of, the both ends of the oil pipe is are machined with externally threaded thread segment, close to two
The part of end thread segment is two lever pieces, and the part between two lever pieces is interlude, by tubing coupling between oil pipe and oil pipe
Oil pipe is linked up to use of going into the well；In the oil pipe (1), interlude oil-pipe external wall equably wraps up one layer of insulating
(2) winding insulating sizing protection band (3) equably, is overlapped in the outside of insulating (2), by outside oil pipe interlude
After insulating and thermal insulation layer sizing protection band have been wrapped up in side, it is penetrated to heat-insulation and heat-preservation oil pipe the outer protection tube (4) in the lump
It is interior；Be provided with anti-displacement forced seal device at the oil pipe (1) interlude both ends, anti-displacement forced seal device respectively by
The adjacent fixed steelring (5) being directly sleeved on oil pipe (1), anti-displacement location ring (6), O-ring seal (7) and the outer protection tube (4)
Be forced compression after the reducer formed with constant slope constitute jointly；In described oil pipe connection box cupling (12) and lever piece
Place, its periphery is fixed with the heat-insulated shell of semicircle (9) of two docking with reinforcement prefabricated in advance, in the semicircle of two docking
Some groups of shell fastening screws (10) are symmetrically arranged with heat-insulated shell (9), in the heat-insulated shell reinforcement of semicircle of two docking
Gap in be filled with heat-barrier material (11), by two docking the heat-insulated shell of semicircle after heat-barrier material is filled with along semicircle
Inner surface and both ends of the surface coat fluid sealant (13)；Docked in the end of described oil pipe (1) interlude with two at lever piece
The heat-insulated shell of semicircle (9) end between be provided with trapezoidal O-ring seal (8).
By insulation material be sleeved on a waterproof, every in the adiabatic bagging (14) of radiant heat into being integral, then uniformly
It is wrapped on the outside of the oil pipe of oil pipe (1) interlude, forms described insulating (2)；It is equal in the outside of insulating (2)
Even overlap joint is wound with is close to the sizing protection band (3) that tightly wraps by thermal insulation layer, and sizing protection band (3) is from the strong fiber of stretching resistance
Band；The outside of sizing protection band (3) be thermal insulation protection oil pipe the outer protection tube (4), the outer protection tube (4) select seamless steel pipe or
Glass reinforced plastic pipe material makes.
Insulation material selects aeroge nano super heat-insulation and heat-preservation felt.
Anti- displacement forced seal device is provided with the oil pipe (1) interlude both ends, the device is by fixed steelring
(5) be welded on the setting position of oil-pipe external wall, then by with enhancing nylon make anti-displacement location ring (6), O-ring seal (7)
Be sleeved on the outside of fixed steelring (5), finally the outer protection tube (4) outermost end by hydraulic test by this at outer layer protect
Pillar (4) and O-ring seal (7) are compressed to thinner external diameter, formed in the end of oil pipe interlude by thicker external diameter, pressure
There is the reducer of the outer protection tube of constant slope.
The heat-insulated shell of semicircle (9) for two docking being fixed on tubing coupling and lever piece is from enhancing nylon material
It is made by Shooting Technique；Multigroup reinforcement is provided with shell；Heat-insulated material is filled with gap between reinforcement
Material；One layer of fluid sealant is coated in the inner surface and both ends of the surface of two heat-insulated shells of semicircle.
In the end of oil pipe (1) intermediate ends with being set at lever piece between the end of two heat-insulated shells of the semicircle docked (9)
The trapezoidal O-ring seal (8) put, trapezoidal O-ring seal (8) are made from nitrile rubber material.
The utility model has the advantages that：Stratum itself heat energy is made full use of, it is heat-insulated by increasing oil pipe on oil pipe column
Heat insulation function, the loss of well head process Crude Oil own temperature is given rise to reduce crude oil from shaft bottom higher temperature, realize and improve
Pit shaft and Wellhead crue oil temperature, improve crude oil viscosity in the wellbore, wax deposition, fluidised form, so as to solving thermal well flushing plus variousization
Anti- medicament, electrical heating viscosity reduction, reduce oil pumper load, oil well economize on electricity and simplify ground gathering and transportation technology flow, change triple-pipe heat tracing
Do not heat normal temperature conveying for single tube, remove a series of significant technology issues such as water heater, be really achieved energy-saving and emission-reduction, extra earning increases
Imitate, substantially reduce cost of oil production.
The utility model has substantive distinguishing features prominent as follows：
1st, anti-displacement forced seal device is provided with heat-insulation and heat-preservation oil pipe both ends, the device successfully solves oil pipe end
Sealing problem, so as to ensure that oil water mixture in oil well can not enter in insulating and reduce heat insulation and preservation effect,
Successfully solve heat-insulation and heat-preservation oil pipe during lower oil tube between pit shaft middle sleeve because producing larger frictional force, and cause
Caused dislocation skew between the outer protection tube and oil pipe insulating.
2nd, by heat-insulation and heat-preservation oil pipe outermost layer protection pipe (4), answered by holding the relatively low high density polyethylene (HDPE) of external pressure ability originally
Condensation material uses the tubing that seamless steel pipe, glass reinforced plastic pipe or other high intensity hold the making of external pressure material instead, is thoroughly solved after improvement
After the outer protection tube crimp, caused by insulating it is thinning and reduce its effect of heat insulation, caused by outer layer protection
The annular pressure increase of pipe (4) and oil pipe (1) and to seal oil pipe end bad, caused by former protective layer part thickening cause oil
Many technical problems such as the accident that pipe is unable to lift.
3rd, the heat-insulated shell of semicircle by two docking in tubing coupling and lever piece has carried out larger improvement, has selected increasing
Strong nylon or other Materials with High Strength make the heat-insulated shell of semicircle, hold external pressure ability for the enhancing heat-insulated shell of semicircle, add in shell
More multigroup reinforcement；To increase the heat-insulating property of the heat-insulated shell of semicircle, it is filled with the gap in shell between reinforcement
Heat-barrier material；For sealed when solving the problems, such as the docking of two semi circular shells it is bad enter liquid, in two heat-insulated shells of semicircle
Surface and both ends of the surface coat one layer of fluid sealant.Solves the former pure heat-insulated shell of nylon structure semicircle outside although being improved more than
See that indeformable but effect of heat insulation is poor, the heat-insulated shell of semicircle of folder heat-barrier material outward appearance in underground higher temperature among former fourth is fine
The technical problems such as deformation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is Fig. 1 along A-A sectional views.
Fig. 3 is Fig. 1 local I enlarged diagram.
Fig. 4 is Fig. 3 along B-B sectional views.
Embodiment
A kind of outer structure for wrapping up in nano heat-insulating thermal insulation tubing described in the utility model, as shown in Figure 1, Figure 2, Figure 3, Figure 4：
Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of, described oil pipe both ends is are machined with externally threaded thread segment, close to both ends thread segment
Part be two lever pieces, the part between two lever pieces is interlude, is joined oil pipe by tubing coupling between oil pipe and oil pipe
Pick up and used to go into the well；One layer of insulating (2) is equably wrapped up in the oil pipe (1) interlude oil-pipe external wall, heat-insulated
The outside of heat-insulation layer (2) equably overlaps winding insulating sizing protection band (3), will wrap up on the outside of oil pipe interlude every
After hot heat-insulation layer and thermal insulation layer sizing protection band, it is penetrated in the lump in heat-insulation and heat-preservation oil pipe the outer protection tube (4).
Aeroge nano super heat-insulation and heat-preservation felt or other insulation materials are sleeved on a waterproof, the thermal insulation every radiant heat
Into (adiabatic bagging is waterproof, the bagging made every radiation hot material) is integral in bagging (14), oil is then uniformly wrapped in
On the outside of the oil pipe for managing (1) interlude, described insulating (2) is formed.
To be uniformly close to heat-insulating heat-preserving material to be wrapped on the outside of oil pipe (1), while prevent in poling by waterproof, every spoke
Penetrate thermal insulation bagging to scratch, therefore use the strong fiber band of stretching resistance uniformly to be overlapped as sizing protection band (3) and be wrapped in heat-insulated guarantor
The outside of adiabator.
The outer protection tube (4) holds external pressure material from seamless steel pipe, glass reinforced plastic pipe or other high intensity and made, to overcome
The external pressure that head of liquid is formed in pit shaft, by the outer protection tube (4) crimp, the outer protection tube (4) is if be squeezed buckling
Shape, insulating can be caused thinning and reduce effect of heat insulation, can also cause the annular space pressure of the outer protection tube (4) and oil pipe (1)
Power increases and makes oil pipe end sealing effectiveness bad, and oil pipe part caliber thickening can be caused when more serious, causes oil pipe to be unable to lift
The accident come occurs.
Anti- displacement forced seal device is provided with the oil pipe (1) interlude both ends, the device is by fixed steelring
(5) be welded on the setting position of oil-pipe external wall, then by with enhancing nylon make anti-displacement location ring (6), O-ring seal (7)
Be sleeved on the outside of fixed steelring (5), finally the outer protection tube (4) outermost end by hydraulic test by this at outer layer protect
Pillar (4) and O-ring seal (7) are compressed to thinner external diameter, the so end in oil pipe interlude by thicker external diameter, pressure
The reducer of the outer protection tube of constant slope is formd, by fixed steelring (5), anti-displacement location ring (6), O-ring seal
(7), there is the reducer collective effect of the outer protection tube (4) of constant slope, constitute complete anti-displacement forced seal device；
The device is to synchronize the outer protection tube (4) and the fine O-ring seal of fourth (7) by hydraulic test to force undergauge to compress, compression
The tight ness rating between the density of O-ring seal and the outer protection tube and O-ring seal is improved afterwards, has reached heat-insulation and heat-preservation oil pipe end
The requirement of portion's sealing, so as to which the oil water mixture that ensure that in oil well can not enter in insulating and reduces effect of heat insulation；
The device under the outer protection tube reducer for having constant slope and fixed steelring (5), anti-displacement location ring (6) collective effect,
Solve heat-insulation and heat-preservation oil pipe during lower oil tube between pit shaft middle sleeve because producing larger frictional force, and cause outer layer
Caused dislocation skew between protection pipe and oil pipe insulating.
The heat-insulated shells of semicircle (9) for two docking being fixed on tubing coupling and lever piece be from enhancing nylon or its
Its Materials with High Strength is made by Shooting Technique；External pressure ability is held for the enhancing heat-insulated shell of semicircle, has been added in shell more
Group reinforcement；To increase the heat-insulating property of the heat-insulated shell of semicircle, heat-insulated material is filled with the gap in shell between reinforcement
Material；For sealed when solving the problems, such as the docking of two semi circular shells it is bad enter liquid, two heat-insulated shells of semicircle inner surface and
Both ends of the surface coat one layer of fluid sealant.
To solve the uncertain problem of spacing when oil pipe is coupled with oil pipe by tubing coupling, in oil pipe (1) intermediate ends
End and the end of two heat-insulated shells of the semicircle docked (9) at lever piece between be provided with trapezoidal O-ring seal (8), with solution
Spacing at this certainly be present and do not know caused sealing problem；Trapezoidal O-ring seal material selection fourth is fine or other pressure-resistant, oil resistants,
Heatproof, corrosion resistant elastomeric material.
Processing and mounting means at described (1) two lever piece of oil pipe are：Oil pipe passes through tubing coupling with oil pipe
(12) after being connected at the construction field (site), by two prefabricated in advance heat-insulated shells of semicircle (9) dock at the scene and with fastening spiral shell
Silk (10) is tightened, and finally installs trapezoidal O-ring seal, and whole installation process is completed.By being used in combination for they,
Heat insulation and preservation effect of the whole tubing string in use of going into the well is ensure that, in lower oil tube between impact resistance, oil resistant pipe and sleeve pipe
Powerful frictional force, bear the realization of the functions such as the external pressure powerful in hot clean-up well.
Described aeroge nano super heat-insulation and heat-preservation felt and adiabatic bagging, from the limited public affairs of ShaoXing,ZheJiang city nano science and technology
Take charge of the product of production.
The heat-insulated shell of described semicircle, anti-displacement location ring, O-ring seal, it is limited from Beijing plus day and development in science and technology
Company's design, the product for producing and selling.
Described steel oil pipe, stretching resistance strong fiber band, seamless steel pipe or glass reinforced plastic pipe, category prior art can consigned processing
Production.
The selection of above material, only it is enumerating in embodiment, other similar products are also the option of this patent, are retouched
It is only section Example rather than whole to state embodiment, and those of ordinary skill in the art are not before creative work is made
The every other embodiment obtained is put, belongs to the protection domain of this patent.
Claims (6)
1. wrapping up in nano heat-insulating thermal insulation tubing outside a kind of, the both ends of the oil pipe is are machined with externally threaded thread segment, close to both ends
The part of thread segment is two lever pieces, and the part between two lever pieces is interlude, will by tubing coupling between oil pipe and oil pipe
Oil pipe links up use of going into the well；Characterized in that, the oil pipe (1) interlude oil-pipe external wall equably wrap up one layer it is heat-insulated
Heat-insulation layer (2), winding insulating sizing protection band (3) is equably overlapped in the outside of insulating (2), by oil pipe
Between wrap up insulating on the outside of section and thermal insulation layer is shaped after protection band, it is penetrated to heat-insulation and heat-preservation oil pipe outer layer protection in the lump
Manage in (4)；Anti- displacement forced seal device, anti-displacement forced seal device are provided with the oil pipe (1) interlude both ends
Protected respectively by the adjacent fixed steelring (5) being directly sleeved on oil pipe (1), anti-displacement location ring (6), O-ring seal (7) and outer layer
Pillar (4) be forced compression after the reducer formed with constant slope constitute jointly；In described oil pipe connection box cupling (12)
And at lever piece, its periphery is fixed with the heat-insulated shell of semicircle (9) of two docking with reinforcement prefabricated in advance, right at two
Some groups of shell fastening screws (10) are symmetrically arranged with the heat-insulated shell of semicircle (9) connect, in the semicircle instlated tubular of two docking
Heat-barrier material (11) is filled with the gap of shell reinforcement, by the heat-insulated shell of semicircle of two docking after heat-barrier material is filled with
Fluid sealant (13) is coated along the inner surface and both ends of the surface of semicircle；At the end of described oil pipe (1) interlude and lever piece
Trapezoidal O-ring seal (8) is provided between the end of the heat-insulated shell of semicircle (9) of two docking.
2. one kind according to claim 1 is outer to wrap up in nano heat-insulating thermal insulation tubing, it is characterised in that is sleeved on insulation material
One waterproof, every, into being integral, being then uniformly wrapped in the oil pipe of oil pipe (1) interlude in the adiabatic bagging (14) of radiant heat
Outside, form described insulating (2)；Uniformly overlap to be wound with the outside of insulating (2) and be close to thermal insulation layer
The sizing protection band (3) tightly wrapped, sizing protection band (3) is from the strong fiber band of stretching resistance；Shape protection band (3) outside be every
Thermal protection oil pipe the outer protection tube (4), the outer protection tube (4) are made from seamless steel pipe or glass reinforced plastic pipe material.
3. one kind according to claim 2 is outer to wrap up in nano heat-insulating thermal insulation tubing, it is characterised in that insulation material selects airsetting
Glue nano super heat-insulation and heat-preservation felt.
4. one kind according to claim 1 is outer to wrap up in nano heat-insulating thermal insulation tubing, it is characterised in that in the oil pipe (1)
Between section both ends be provided with anti-displacement forced seal device, the device is the setting that fixed steelring (5) is welded on to oil-pipe external wall
On position, then the outer of fixed steelring (5) will be sleeved on the anti-displacement location ring (6) of enhancing nylon making, O-ring seal (7)
Side, finally the outer protection tube (4) outermost end by hydraulic test by this at the outer protection tube (4) and O-ring seal (7)
By thicker external diameter, pressure is compressed to thinner external diameter, and the outer layer that constant slope is formd in the end of oil pipe interlude is protected
The reducer of pillar.
A kind of outer wrap up in nano heat-insulating thermal insulation tubing 5. according to claim 1, it is characterised in that be fixed on tubing coupling and
The heat-insulated shell of semicircle (9) of two docking on lever piece is to be made from enhancing nylon material by Shooting Technique；
Multigroup reinforcement is provided with shell；Heat-barrier material is filled with gap between reinforcement；In two heat-insulated shells of semicircle
Inner surface and both ends of the surface coat one layer of fluid sealant.
6. one kind according to claim 1 is outer to wrap up in nano heat-insulating thermal insulation tubing, it is characterised in that in oil pipe (1) intermediate ends
End and the end of two heat-insulated shells of the semicircle docked (9) at lever piece between the trapezoidal O-ring seal (8) that sets, it is trapezoidal
O-ring seal (8) is made from nitrile rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504232.XU CN206737840U (en) | 2017-05-08 | 2017-05-08 | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504232.XU CN206737840U (en) | 2017-05-08 | 2017-05-08 | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206737840U true CN206737840U (en) | 2017-12-12 |
Family
ID=60562777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720504232.XU Withdrawn - After Issue CN206737840U (en) | 2017-05-08 | 2017-05-08 | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206737840U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907114A (en) * | 2017-05-08 | 2017-06-30 | 刘兴仁 | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of |
| CN114458838A (en) * | 2022-01-22 | 2022-05-10 | 巩义市泛锐熠辉复合材料有限公司 | Heat-insulation composite pipe and preparation method thereof |
-
2017
- 2017-05-08 CN CN201720504232.XU patent/CN206737840U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907114A (en) * | 2017-05-08 | 2017-06-30 | 刘兴仁 | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of |
| CN106907114B (en) * | 2017-05-08 | 2023-05-02 | 刘兴仁 | Externally wrapped nano heat-insulating oil pipe |
| CN114458838A (en) * | 2022-01-22 | 2022-05-10 | 巩义市泛锐熠辉复合材料有限公司 | Heat-insulation composite pipe and preparation method thereof |
| CN114458838B (en) * | 2022-01-22 | 2023-11-03 | 巩义市泛锐熠辉复合材料有限公司 | Heat-insulating composite pipe and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106089107B (en) | One kind is wear-resisting, liner is pressure-resistant, anti-corrosion, nano heat-insulating composite oil pipe | |
| CN106907114A (en) | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of | |
| CN107165585B (en) | Wear-resistant, heat-insulating and heat-preserving composite oil pipe with lining | |
| CN101592033B (en) | Assembly form and supporting method for in-soil assembled plastic pipes | |
| CN206737840U (en) | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of | |
| CN104100209A (en) | Heat-insulation layer coated tubing | |
| CN206737841U (en) | A kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside | |
| CN211624604U (en) | Energy-saving prefabricated overhead composite heat-insulating pipe and pipe bracket thereof | |
| CN107100552A (en) | A kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside | |
| CN206957590U (en) | A kind of liner heat-insulation and heat-preservation oil pipe | |
| CN206268618U (en) | A kind of pipeline support frame used in pipe gallery and its external member | |
| CN207212287U (en) | A kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe | |
| CN207210981U (en) | Assembled steel concrete combined structure culvert | |
| CN107060656A (en) | A kind of liner heat-insulation and heat-preservation oil pipe | |
| CN204040920U (en) | Aeroge compound heat-insulation sleeve pipe | |
| CN203797184U (en) | Pipe connecting component structure | |
| CN207112198U (en) | A kind of steel strip reinforced PE helical bellowses for being easy to connection | |
| CN205824388U (en) | A kind of underground mine use skeleton strengthens dual anti-PPR pipe line | |
| CN101586708B (en) | Deep-sea oil gas conveying composition pipe and method for producing the same | |
| CN208634552U (en) | Enhanced hollow spiral tube | |
| CN209799880U (en) | inside and outside thermal-insulated directly links type heat-insulated oil pipe | |
| CN210164435U (en) | Heat-point-free heat-insulation tubing coupling heat-insulation structure | |
| CN205895162U (en) | Wear -resisting, inside lining is withstand voltage, anticorrosive, nanometer separates heat recombination oil pipe | |
| CN202195232U (en) | Component for repairing local damage of pipeline | |
| CN206397444U (en) | A kind of thermal compensation petroleum pipeline deferent box cupling structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171212 Effective date of abandoning: 20230502 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20171212 Effective date of abandoning: 20230502 |