CN208731626U - Oil well steel tube end internal screw thread waterproof thread protector - Google Patents
Oil well steel tube end internal screw thread waterproof thread protector Download PDFInfo
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- CN208731626U CN208731626U CN201821270255.XU CN201821270255U CN208731626U CN 208731626 U CN208731626 U CN 208731626U CN 201821270255 U CN201821270255 U CN 201821270255U CN 208731626 U CN208731626 U CN 208731626U
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- back cover
- screw thread
- steel
- protection ring
- plastomer
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- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
A kind of oil well steel tube end internal screw thread waterproof thread protector is provided, including steel loop shell, plastics protection ring is placed on steel loop hull outside by injection molding, external screw thread is formed on plastics protection ring external peripheral surface, steel loop shell lower port is sealed by steel body back cover, plastics protection ring lower port is sealed by plastomer back cover, steel body back cover and plastomer back cover center are equipped with internal thread hole, plastomer back cover lower part is connected with lower supporting plate, dish-shaped reed is equipped between lower supporting plate and plastomer back cover, dish-shaped reed housing has sealing ring, after thread protector and oil well steel tube end internal screw thread screw, external screw thread compact heap and steel body back cover and the internal thread hole at plastomer back cover center, which screw, moves down the dish-shaped reed of compression, dish-shaped reed is tightly attached to oil well steel pipe internal-surface by rising outside lower pressure distortion and squeezing sealing ring, realize that screw thread is protected The sealing of protection unit lower end and steel pipe internal-surface prevents rainwater from flowing into internal screw thread, and steel pipe internal screw thread is avoided to occur corroding and other issues.
Description
Technical field
The utility model belongs to screw thread protection technical field, and in particular to a kind of oil well steel tube end internal screw thread use is anti-
Water thread protector.
Background technique
Oil well steel pipe is the common component of oil mining, oil well steel pipe during transportation, easily to pipe end
Screw thread damages, and pipe end head thread once damages, and will lead to scrapping for entire steel pipe.In order to guarantee making for oil well steel pipe
With performance, generally protected by screw thread of the thread protector to steel pipe tube head.Authorization Notice No. is " CN 202481515
U ", entitled " nonpetroleum oil well steel pipe pipe end coupling internal thread protection device " patent disclose a kind of internal screw thread protection dress
It sets, matched plastics protection ring is set in the outer circle of steel loop shell, be formed in the outer circle of plastics protection ring and oil well
The compatible external screw thread of steel tube end coupling internal thread, uniformly distributed protrusion in the outer circle of steel loop shell, on the inner wall of plastics protection ring
It is formed with groove, and is located at protrusion in groove, by the combination of groove and protrusion, lateral impact resistant capability is improved and prevents
Fall off performance, increases the axial strength of steel loop shell, reduces the deviation from circular from of steel loop, and then improve the thread of plastics protection ring
Circularity improves the quality and protecting effect of product.Existing steel pipe internal thread protection device is typically all up big and down small taper
Structure sees although structure can play a certain protective role steel pipe internal screw thread, existing some screw thread protections dresses by
Waterproof construction is not designed in lower end base, and due to small big pyramidal structure under thread protector entirety, makes spiral shell
When line protective device is placed on steel pipe, it cannot be fitted closely between the tiny cone opening outer surface of lower end and steel pipe internal-surface, it cannot
It prevents rainwater from entering in steel tube screw thread, is easy that screw thread is caused to corrode, influences tube quality.It is therefore desirable to propose to improve.
Utility model content
The technical problem solved by the utility model is:to provide a kind of oil well steel tube end internal screw thread waterproof screw thread protections
Device, the utility model push dish-shaped reed by external screw thread compact heap, and dish-shaped reed is squeezed sealing by rising outside lower pressure distortion
Circle is tightly attached to oil well steel pipe internal-surface, realizes the sealing of thread protector lower end and steel pipe internal-surface, prevent rainwater from
It is flowed into internal screw thread in steel duct and protective device gap, avoid occurring corroding in steel pipe internal screw thread and other issues, guarantee
The service performance of petroleum steel pipe.
The technical solution adopted in the utility model: oil well steel tube end internal screw thread waterproof thread protector, packet
Steel loop shell, plastics protection ring and external screw thread compact heap are included, the plastics protection ring is placed on steel by single injection-molded fixation
Ring hull outside is formed with the outer spiral shell being adapted to the internal screw thread of oil well steel tube end on the plastics protection ring external peripheral surface
Line, the steel loop shell lower port are sealed by steel body back cover, and the plastics protection ring lower port is by being placed under steel body back cover
Portion and the plastomer back cover being close to steel body back cover sealing, the steel body back cover and plastomer back cover center are equipped with internal thread hole, described
Plastomer back cover lower part is connected with lower supporting plate, and dish-shaped reed, the disk spring are equipped between the lower supporting plate and plastomer back cover
It is cased with sealing ring on piece excircle, it is described outer after thread protector is adapted to oil well steel tube end internal screw thread to be screwed
Screw thread compact heap and steel body back cover and the internal thread hole at plastomer back cover center, which screw to move down, compresses disk spring piece upper surface, the dish
Shape reed is tightly attached to oil well steel pipe internal-surface and realizes thread protector by rising outside lower pressure distortion and squeezing sealing ring
The sealing of lower end and steel pipe internal-surface.
Wherein, even circumferential is equipped with multiple connecting columns on the lower supporting plate upper surface, and the connecting column passes through disk spring
Piece and plastomer back cover are fixedly connected with steel body back cover, and the dish reed corresponding position is equipped with the strip passed through convenient for connecting column
Hole；The external screw thread compact heap, dish-shaped reed and lower supporting plate center are equipped with the hole convenient for ventilation, the sealing ring external seal
Face is cylindrical surface or undaform face.
Further, multiple hanging holes are uniformly provided on the steel loop shell, the plastics protection ring is in injection molding process
Middle injection molding feed liquid forms hanging column after filling full hanging hole, and embedding be wrapped in plastics protection ring is routed up in steel loop shell upper end radially outward
Form upper limit flange.
Further, the steel loop shell upper open end diameter is tapered greater than lower end sealing end diameter, the plastics
Protection ring and steel loop shell physical fit are also tapered, and the one week edge in plastics protection ring upper end is equipped with single injection-molded
Sealing protection platform, external screw thread on the plastics protection ring external peripheral surface machine vehicle system by lathe and form or protect in plastics
Single injection-molded in retaining ring injection moulding process.
The utility model compared with prior art the advantages of:
1, this programme is cased with sealing ring, outer spiral shell by setting dish-shaped reed on lower supporting plate on dish-shaped reed excircle
The internal thread hole of line compact heap and steel body back cover and plastomer back cover center, which screws to move down, compresses dish-shaped reed, and dish-shaped reed is by under
Pressure distortion rises outside, squeezes sealing ring and is tightly attached to oil well steel pipe internal-surface, realizes in thread protector lower end and steel pipe
The sealing on surface prevents rainwater from flowing into internal screw thread from steel duct and protective device gap, avoids going out in steel pipe internal screw thread
Now corrosion and other issues, guarantees the service performance of petroleum steel pipe；
2, this programme was both limited by the conjunction of the extension of multiple groups hanging column and hanging hole between steel loop shell and plastics protection ring,
The loose phenomenon for mutually not borrowing power to occur between steel loop shell and plastics protection ring is prevented, the abjection of steel loop shell is effectively prevent to cause
Protective device failure the problem of；
3, plastics protection ring simplifies processing technology entirely through single injection-molded in this programme, saved labour at
This, and plastics protection ring is closed by the extension of multiple groups hanging column and hanging hole after connecting with steel loop shell, plastics can be effectively prevent to protect
Retaining ring and the horizontal and vertical deformation of screw thread thereon.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
1 the embodiments of the present invention are described with reference to the accompanying drawing.
Oil well steel tube end internal screw thread waterproof thread protector, as shown in Figure 1, including steel loop shell 1, plastics
Protection ring 2 and external screw thread compact heap 11, the plastics protection ring 2 are placed on outside steel ring shell body 1 by single injection-molded fixation,
The 1 upper open end diameter of steel loop shell is tapered greater than lower end sealing end diameter, the plastics protection ring 2 and steel loop shell
1 physical fit is also tapered, and 2 upper end of plastics protection ring, one week edge is equipped with the sealing protection platform 6 of single injection-molded, institute
State the external screw thread 3 for being formed on 2 external peripheral surface of plastics protection ring and being adapted to the internal screw thread of oil well steel tube end, the plastics
External screw thread 3 on 2 external peripheral surface of protection ring machines vehicle system by lathe and forms or one in 2 injection moulding process of plastics protection ring
Secondary injection molding.
Multiple hanging holes 4 are uniformly provided on the steel loop shell 1, the plastics protection ring 2 is molded in injection molding process
Feed liquid, which is filled, forms hanging column 5 after full hanging hole 4, and 1 upper end of steel loop shell is routed up radially outward embedding is wrapped in shape in plastics protection ring 2
At upper limit flange 7.The utility model passes through the extension of multiple groups hanging column 5 and hanging hole 4 between steel loop shell 1 and plastics protection ring 2
Conjunction is limited, and has been prevented the loose phenomenon for mutually not borrowing power to occur between steel loop shell 1 and plastics protection ring 2, has been effectively prevent steel
The problem of protective device caused by toroidal shell body 1 is deviate from fails.
1 lower port of steel loop shell is sealed by steel body back cover 8, and 8 edge of steel body back cover passes through welding and steel loop shell 1
It is fixedly connected, 2 lower port of plastics protection ring is sealed by the plastomer for being placed in 8 lower part of steel body back cover and being close to steel body back cover 8
Bottom 9 seals, and the plastomer back cover 9 is integrally formed in 2 injection moulding process of plastics protection ring, the steel body back cover 8 and plastomer
9 center of back cover is equipped with internal thread hole 10.9 lower part of plastomer back cover is connected with lower supporting plate 12, the lower supporting plate 12 and modeling
It is equipped with dish-shaped reed 14 between body back cover 9, is cased with sealing ring 15 on dish 14 excircle of reed.Specifically, lower supporting plate
12 fixed form are as follows: even circumferential is equipped with multiple connecting columns 13 on 12 upper surface of lower supporting plate, under the connecting column 13
End is fixedly connected or with welding etc. can be used between lower supporting plate 12 using the removable connections such as bolt, 13 upper end of connecting column
It is fixedly connected across dish-shaped reed 14 and plastomer back cover 9 with steel body back cover 8, between 13 upper end of connecting column and steel body back cover 8
Welding etc. can also be used to be fixedly connected or using removable connections such as bolts.Dish 14 corresponding position of reed, which is equipped with, to be convenient for
The strip hole 17 that connecting column 13 passes through, strip hole 17 are not only able to passing through convenient for connecting column 13, and can be dish-shaped reed
14 deformation provides certain space, the interference for preventing 13 pairs of connecting column dish-shaped reeds 14 from deforming.
After thread protector is adapted to oil well steel tube end internal screw thread to be screwed, the external screw thread compact heap 11 with
The internal thread hole 10 at 9 center of steel body back cover 8 and plastomer back cover, which screws, moves down and compresses dish-shaped 14 upper surface of reed, the disk spring
Piece 14 is risen outside by lower pressure distortion, and is squeezed sealing ring 15 and be tightly attached to oil well steel pipe internal-surface, realizes thread protector
The sealing of lower end and steel pipe internal-surface prevents rainwater from flowing into steel pipe internal screw thread from steel duct and protective device gap, keeps away
Exempt to occur corroding in steel pipe internal screw thread and other issues, guarantee the service performance of petroleum steel pipe.
The external screw thread compact heap 11, dish-shaped reed 14 and 12 center of lower supporting plate are equipped with the hole convenient for ventilation；It is described
15 external seal face of sealing ring is cylindrical surface 16 or undaform face, can further increase sealing effect.
Above-described embodiment, the only preferred embodiment of the utility model are not used to limit the utility model practical range,
Therefore all equivalence changes done with content described in the utility model claims, the utility model claims model should all be included in
Within enclosing.
Claims (3)
1. oil well steel tube end internal screw thread waterproof thread protector, including steel loop shell (1), plastics protection ring (2)
With external screw thread compact heap (11), the plastics protection ring (2) is external by the fixed steel ring shell body (1) that is placed on of single injection-molded,
It is formed with the external screw thread (3) being adapted to the internal screw thread of oil well steel tube end on plastics protection ring (2) external peripheral surface,
Be characterized in that: steel loop shell (1) lower port is sealed by steel body back cover (8), and plastics protection ring (2) lower port passes through
Plastomer back cover (9) sealing for being placed in steel body back cover (8) lower part and being close to steel body back cover (8), the steel body back cover (8) and plastomer
Back cover (9) center is equipped with internal thread hole (10), and plastomer back cover (9) lower part is connected with lower supporting plate (12), the lower support
It is equipped between plate (12) and plastomer back cover (9) dish-shaped reed (14), is cased with sealing ring on described dish reed (14) excircle
(15), after thread protector is adapted to oil well steel tube end internal screw thread to be screwed, the external screw thread compact heap (11) with
Steel body back cover (8) and the internal thread hole (10) at plastomer back cover (9) center, which screw, moves down dish-shaped reed (14) upper surface of compression, described
Dish-shaped reed (14) is tightly attached to oil well steel pipe internal-surface and realizes spiral shell by rising outside lower pressure distortion and squeezing sealing ring (15)
The sealing of line protective device lower end and steel pipe internal-surface；
Steel loop shell (1) the upper open end diameter be greater than lower end sealing end diameter it is tapered, the plastics protection ring (2) with
Steel loop shell (1) physical fit is also tapered, and the one week edge in plastics protection ring (2) upper end is equipped with the close of single injection-molded
Seal protecting stand (6), the external screw thread (3) on plastics protection ring (2) external peripheral surface formed by lathe machining vehicle system or
The single injection-molded in plastics protection ring (2) injection moulding process.
2. oil well steel tube end internal screw thread waterproof thread protector according to claim 1, it is characterised in that:
Even circumferential is equipped with multiple connecting columns (13) on lower supporting plate (12) upper surface, and the connecting column (13) passes through dish-shaped reed
(14) it is fixedly connected with plastomer back cover (9) with steel body back cover (8), dish reed (14) corresponding position is equipped with convenient for connection
The strip hole (17) that column (13) passes through；The external screw thread compact heap (11), dish-shaped reed (14) and lower supporting plate (12) center are equal
Equipped with the hole convenient for ventilation, sealing ring (15) the external seal face is cylindrical surface (16) or undaform face.
3. oil well steel tube end internal screw thread waterproof thread protector according to claim 1, it is characterised in that:
It is uniformly provided with multiple hanging holes (4) on the steel loop shell (1), plastics protection ring (2) injection molding material in injection molding process
Liquid fills full hanging hole (4) and forms hanging column (5) afterwards, and steel loop shell (1) upper end is routed up radially outward embedding is wrapped in plastics protection ring
(2) upper limit flange (7) are formed in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821270255.XU CN208731626U (en) | 2018-08-08 | 2018-08-08 | Oil well steel tube end internal screw thread waterproof thread protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821270255.XU CN208731626U (en) | 2018-08-08 | 2018-08-08 | Oil well steel tube end internal screw thread waterproof thread protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208731626U true CN208731626U (en) | 2019-04-12 |
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ID=66028686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821270255.XU Active CN208731626U (en) | 2018-08-08 | 2018-08-08 | Oil well steel tube end internal screw thread waterproof thread protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208731626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489291A (en) * | 2023-12-31 | 2024-02-02 | 大庆市天德忠石油科技有限公司 | Casing head with compression type sealing structure |
-
2018
- 2018-08-08 CN CN201821270255.XU patent/CN208731626U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489291A (en) * | 2023-12-31 | 2024-02-02 | 大庆市天德忠石油科技有限公司 | Casing head with compression type sealing structure |
| CN117489291B (en) * | 2023-12-31 | 2024-04-05 | 大庆市天德忠石油科技有限公司 | Casing head with compression type sealing structure |
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