CN205938255U - Take threaded connection structure of coating steel pipe with anti - corrosion feature - Google Patents
Take threaded connection structure of coating steel pipe with anti - corrosion feature Download PDFInfo
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- CN205938255U CN205938255U CN201620887549.1U CN201620887549U CN205938255U CN 205938255 U CN205938255 U CN 205938255U CN 201620887549 U CN201620887549 U CN 201620887549U CN 205938255 U CN205938255 U CN 205938255U
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- steel pipe
- sealing shroud
- connection structure
- screw connection
- proof function
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Abstract
The utility model relates to a take threaded connection structure of coating steel pipe with anti - corrosion feature, including steel pipe and coupling, steel tube end processing has male thread, coupling both ends processing have with the male thread matched with box thread, its characterized in that: the axial middle part of coupling inner wall is equipped with the seal cover, the length of seal cover to make with the coupling joint after the steel pipe have at least some enter into in the seal cover and with the cooperation of seal cover sealing contact, and the steel pipe all is equipped with anticorrosion coating with the internal and external surface and the terminal surface of seal cover sealing contact mating part. The utility model discloses a threaded connection simple structure is reliable, and the leakproofness is good, can improve the non -corrosibility ability of oil well pipe and coupling greatly, prolongs the life of oil well pipe and coupling.
Description
Technical field
This utility model is related to oil pipe, sleeve pipe or the line pipe of oil field use, and specifically one kind has anticorrosion work(
The screw connection structure of the band coating steel pipe of energy.
Background technology
In oil and gas development, oil well pipe bears multiple load and the synergy of different corrosive medium at work, some
In oil well, well liquid contains saline, carbon dioxide, hydrogen sulfide or corrosion-causing bacteria, the depositing of these corrosive mediums or corrosion-causing bacteria
Greatly reducing the service life of oil well pipe, especially oil well pipe is always domestic with the etching problem of oil well pipe junction
A difficult problem present in each elephant well construction.Existing oil well pipe and its box cupling generally pass through in inwall and connecting portion setting
Erosion shield, makes with antiseptic property, can sustain the corrosion of corrosive medium or corrosion-causing bacteria in oil well, but due to
Oil well pipe needs dismounting assembling in actual use, and in dismounting assembling process, erosion shield is inevitably worn.
And because the diameter dimension of different oil well pipes has fine difference unavoidably, different oil well pipes so can be led to enter box cupling
Depth is different, repeatedly after dismounting assembling, oil well pipe and box cupling necessarily has erosion shield be worn away position and is directly exposed to corruption
So that the antiseptic property of oil well pipe and its box cupling substantially reduces under erosion medium, the service life of oil well pipe and its box cupling is also big
Big shortening.
Content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides and a kind of has corrosion proof function
The screw connection structure of band coating steel pipe, this screw connection structure is simple and reliable, good airproof performance, be greatly improved oil well pipe and its
The antiseptic property of box cupling, extends the service life of oil well pipe and its box cupling.
The technical scheme providing according to this utility model：There is the threaded knot of the band coating steel pipe of corrosion proof function
Structure, including steel pipe and box cupling, described steel tube end part is machined with male thread, and described box cupling two ends are machined with and are matched with described male thread
The box thread closing；It is characterized in that：Be provided with sealing shroud in the middle part of the axial direction of described box cupling inwall, the length of described sealing shroud to make with
Steel pipe after box cupling joint is at least part of to be entered in sealing shroud and the cooperation in sealing contact with sealing shroud, and described steel pipe
It is equipped with erosion shield with the surfaces externally and internally of sealing shroud mating part in sealing contact and end face.
As further improvement of the utility model, in the middle part of the axial direction of described box cupling inwall, it is provided with annular groove, described
Sealing shroud is installed in described annular groove.
As further improvement of the utility model, in the middle part of the axial direction of described sealing shroud inwall, it is provided with cannelure.
As further improvement of the utility model, the periphery wall that described steel pipe enters into sealing shroud interior part is smooth table
The geometry in face, the position that described sealing shroud two ends are engaged with steel pipe sealing is also set to the geometry of smooth surface.
As further improvement of the utility model, between leaving between the end face of two being combined with described box cupling piece steel pipe
Gap, the periphery wall that described steel pipe enters into sealing shroud interior part has male thread, and described sealing shroud two ends are contacted with steel pipe sealing
The position of cooperation also is provided with the box thread matching with described male thread.
As further improvement of the utility model, on described steel pipe, the rear end of male thread is provided with outer torque resistant step,
The periphery wall that described steel pipe enters into sealing shroud interior part has male thread, and described sealing shroud two ends are engaged with steel pipe sealing
Position also be provided with the box thread that matches with described male thread.
As further improvement of the utility model, described sealing shroud is resisted using having to the corrosive medium in gas well gas liquid
The elastomeric material of ability is made.
As further improvement of the utility model, described sealing shroud is made using polytetrafluoroethylmaterial material.
As further improvement of the utility model, described erosion shield be the corrosive medium in gas well gas liquid is had to
The coating of imperial ability.
As further improvement of the utility model, described erosion shield is plasticizing modified epoxy powder coating.
This utility model compared with prior art, has the advantage that：This utility model passes through to set up sealing in box cupling
Set, makes that steel pipe is at least part of to keep cooperation in sealing contact with sealing shroud, and in sealing contact with sealing shroud on steel pipe joins
The surfaces externally and internally of conjunction part and end face is provided with erosion shield so that screw connection structure of the present utility model is simple and reliable,
Good airproof performance, is greatly improved the antiseptic property of oil well pipe and its box cupling, extends the service life of oil well pipe and its box cupling.
Brief description
Fig. 1 is the structural representation of this utility model embodiment 1.
Fig. 2 is the A portion enlarged diagram in Fig. 1.
Fig. 3 is the structural representation of this utility model embodiment 2.
Specific embodiment
With reference to concrete drawings and Examples, the utility model is described in further detail.
The screw connection structure of the band coating steel pipe with corrosion proof function of the present utility model is mainly by steel pipe 2 and box cupling
1 composition, described steel pipe 2 end is machined with male thread, and described box cupling 1 two ends are machined with the female spiral shell matching with described male thread
Stricture of vagina；It is provided with annular groove in the middle part of the axial direction of described box cupling 1 inwall, in described annular groove, be installed with sealing shroud 3, described sealing
The length of set 3 to make to engage with box cupling 1 after steel pipe 2 at least part of enter in sealing shroud 3 and seal with sealing shroud 3 connect
Touch cooperation, and described steel pipe 2 is equipped with erosion shield with the surfaces externally and internally of sealing shroud 3 mating part in sealing contact and end face
4.
In this utility model, in the middle part of the axial direction of described sealing shroud 3 inwall, it is provided with cannelure, so in steel pipe 2 and sealing shroud 3
When being engaged, sealing shroud 3 is squeezed just the space being deformed inward, it is to avoid sealing shroud 3 is squeezed bad.
The periphery wall that described steel pipe 2 enters into sealing shroud 3 interior part is the geometry of smooth surface, described sealing shroud 3
The position of two ends and steel pipe 2 cooperation in sealing contact is also set to the geometry of smooth surface.
In this utility model, described sealing shroud 3 should be using the elastic material to the corrosive medium in well liquid with defensive ability/resistance ability
Material is made, and is such as made using polytetrafluoroethylmaterial material.Described erosion shield 4 is the corrosive medium in gas well gas liquid to be had resist
The coating of ability, such as plastifying modified epoxy powder coating.
Embodiment 1
As shown in Figure 1 and Figure 2, the screw connection structure of the band coating steel pipe with corrosion proof function in embodiment 1 is main
It is made up of steel pipe 2 and box cupling 1, described steel pipe 2 end is machined with male thread, described box cupling 1 two ends are machined with and described male thread
The box thread matching；It is provided with annular groove in the middle part of the axial direction of described box cupling 1 inwall, in described annular groove, be installed with sealing
Set 3, the length of described sealing shroud 3 to make to engage with box cupling 1 after steel pipe 2 at least part of enter into sealing shroud 3 interior and with
Sealing shroud 3 cooperation in sealing contact, and described steel pipe 2 is equal with the surfaces externally and internally of sealing shroud 3 mating part in sealing contact and end face
It is provided with erosion shield 4.
As shown in Figure 1 and Figure 2, in the present embodiment 1, in the middle part of the axial direction of described sealing shroud 3 inwall, it is provided with cannelure.
As shown in Figure 1 and Figure 2, in the present embodiment 1, between leaving between the end face of two steel pipes 2 being combined with described box cupling 1
Gap, the periphery wall that described steel pipe 2 enters into sealing shroud 3 interior part has male thread, and described sealing shroud 3 two ends are sealed with steel pipe 2
The position being engaged also is provided with the box thread matching with described male thread.
In the present embodiment 1, threaded cooperation due to having between sealing shroud 3 and steel pipe 2, sealing property is more outstanding, prevent
Corrosive nature is also more preferable.
Embodiment 2
As shown in figure 3, the screw connection structure of the band coating steel pipe with corrosion proof function in embodiment 2 is mainly by steel
Pipe 2 and box cupling 1 form, and described steel pipe 2 end is machined with male thread, and described box cupling 1 two ends are machined with and are matched with described male thread
The box thread closing；It is provided with annular groove in the middle part of the axial direction of described box cupling 1 inwall, in described annular groove, be installed with sealing shroud 3,
The length of described sealing shroud 3 to make to engage with box cupling 1 after steel pipe 2 at least part of enter in sealing shroud 3 and with sealing
Cover 3 cooperations in sealing contact, and described steel pipe 2 is equipped with the surfaces externally and internally of sealing shroud 3 mating part in sealing contact and end face
Erosion shield 4.
As shown in figure 3, in the present embodiment 2, being provided with cannelure in the middle part of the axial direction of described sealing shroud 3 inwall.
As shown in figure 3, in the present embodiment 2, on described steel pipe 2, the rear end of male thread is provided with outer torque resistant step 5, described
The periphery wall that steel pipe 2 enters into sealing shroud 3 interior part has male thread, described sealing shroud 3 two ends and steel pipe 2 cooperation in sealing contact
Position also be provided with the box thread that matches with described male thread.
The present embodiment 2 compared with Example 1, not only has between sealing shroud 3 and steel pipe 2 and threadeds cooperation, and with institute
State the direct gentle touchdown of end face of two steel pipes 2 of box cupling 1 combination, substantially increase the intensity of connection.In actual applications, two
The end face of root steel pipe 2 can also be the disengaged condition slightly leaving minim gap.
Further, since the outer torque resistant step 5 on steel pipe 2 is to be set directly at male thread rear end, processing technique is simple,
Processing cost is low.
Claims (10)
1. there is the screw connection structure of the band coating steel pipe of corrosion proof function, including steel pipe（2）And box cupling（1）, described steel pipe
（2）End is machined with male thread, described box cupling（1）Two ends are machined with the box thread matching with described male thread；Its feature exists
In：Described box cupling（1）It is provided with sealing shroud in the middle part of the axial direction of inwall（3）, described sealing shroud（3）Length to make and box cupling（1）Connect
Steel pipe after conjunction（2）At least part of enter into sealing shroud（3）Interior and and sealing shroud（3）Cooperation in sealing contact, and described
Steel pipe（2）With sealing shroud（3）The surfaces externally and internally of mating part in sealing contact and end face are equipped with erosion shield（4）.
2. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State box cupling（1）It is provided with annular groove, described sealing shroud in the middle part of the axial direction of inwall（3）It is installed in described annular groove.
3. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State sealing shroud（3）It is provided with cannelure in the middle part of the axial direction of inwall.
4. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State steel pipe（2）Enter into sealing shroud（3）The periphery wall of interior part is the geometry of smooth surface, described sealing shroud（3）Two ends
With steel pipe（2）The position of cooperation in sealing contact is also the geometry of smooth surface.
5. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：With
Described box cupling（1）In conjunction with two steel pipes（2）End face between leave gap, described steel pipe（2）Enter into sealing shroud（3）Internal
The periphery wall dividing has male thread, described sealing shroud（3）Two ends and steel pipe（2）The position of cooperation in sealing contact also be provided with described
The box thread that male thread matches.
6. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State steel pipe（2）The rear end of upper male thread is provided with outer torque resistant step（5）, described steel pipe（2）Enter into sealing shroud（3）Interior part
Periphery wall there is male thread, described sealing shroud（3）Two ends and steel pipe（2）The position of cooperation in sealing contact also is provided with and described public affairs
The box thread that screw thread matches.
7. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State sealing shroud（3）Made using the elastomeric material to the corrosive medium in gas well gas liquid with defensive ability/resistance ability.
8. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State sealing shroud（3）Made using polytetrafluoroethylmaterial material.
9. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：Institute
State erosion shield（4）It is the coating to the corrosive medium in gas well gas liquid with defensive ability/resistance ability.
10. there is the screw connection structure of the band coating steel pipe of corrosion proof function as claimed in claim 1 it is characterised in that：
Described erosion shield（4）For plastifying modified epoxy powder coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620887549.1U CN205938255U (en) | 2016-08-16 | 2016-08-16 | Take threaded connection structure of coating steel pipe with anti - corrosion feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620887549.1U CN205938255U (en) | 2016-08-16 | 2016-08-16 | Take threaded connection structure of coating steel pipe with anti - corrosion feature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205938255U true CN205938255U (en) | 2017-02-08 |
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ID=57918121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620887549.1U Active CN205938255U (en) | 2016-08-16 | 2016-08-16 | Take threaded connection structure of coating steel pipe with anti - corrosion feature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287044A (en) * | 2016-08-16 | 2017-01-04 | 陆金福 | There is the screw connection structure of the band coating steel pipe of corrosion proof function |
| CN112824727A (en) * | 2019-11-20 | 2021-05-21 | 宝山钢铁股份有限公司 | Bimetal composite pipe threaded joint and preparation method thereof |
-
2016
- 2016-08-16 CN CN201620887549.1U patent/CN205938255U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287044A (en) * | 2016-08-16 | 2017-01-04 | 陆金福 | There is the screw connection structure of the band coating steel pipe of corrosion proof function |
| CN112824727A (en) * | 2019-11-20 | 2021-05-21 | 宝山钢铁股份有限公司 | Bimetal composite pipe threaded joint and preparation method thereof |
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| GR01 | Patent grant |