CN208152958U - A kind of sealing structure of the threaded connection place of steel pipe - Google Patents
A kind of sealing structure of the threaded connection place of steel pipe Download PDFInfo
- Publication number
- CN208152958U CN208152958U CN201820711653.4U CN201820711653U CN208152958U CN 208152958 U CN208152958 U CN 208152958U CN 201820711653 U CN201820711653 U CN 201820711653U CN 208152958 U CN208152958 U CN 208152958U
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- China
- Prior art keywords
- steel pipe
- thread
- male thread
- factory
- seal ring
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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.)
- Expired - Fee Related
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model discloses a kind of sealing structures of the threaded connection place of oil pipe that oil field uses, casing or line pipe.Specifically a kind of sealing structure of the threaded connection place of steel pipe, including steel pipe factory end, steel pipe scene end and box cupling, the end at steel pipe factory end have male thread, and the end at steel pipe scene end also has male thread, and box cupling has box thread；Centered on the contact position of two steel pipes, on box cupling box thread, distance center point both sides certain distance is each provided with a soft seal ring, is provided with screw thread on two sealing rings, and screw thread thereon holds the complete thread section of male thread and the complete thread section matching of factory's end male thread on site respectively；The soft seal ring being distributed by two sides and helicitic texture thereon, can avoid gap to greatest extent in this way in seal process, reach preferable sealing effect.
Description
Technical field
The utility model relates to a kind of sealing structure more particularly to a kind of sealing structures of the threaded connection place of steel pipe.
Background technique
It is examined when being connected two steel pipes using box cupling in the threaded connection place of oil pipe, casing or line pipe that oil field uses
Consider the tightness situation cooperated between the direct screw thread of the two, in fact it could happen that the box thread of box cupling and the male thread of steel pipe are long-term
In use process, there is cooperation defective tightness, the case where permeability occur, be arranged in the prior art using at two couplings
Sealing ring comes to solving the problems, such as this, but since the incomplete thread section of sealing ring and male thread cooperates, incomplete thread section packet
Start screw threads section and tip thread segment are included, and the tooth form of incomplete thread section is imperfect, the tooth form of incomplete thread exists sharp
Part, when male and female is threadedly engaged, the tooth form sharp parts of male thread incomplete thread section will be scratched on flexible seal ring
Box thread tooth form.
In addition, flexible seal ring is not no thread tooth before male and female is threadedly engaged at present.Spiral shell on flexible seal ring
Line tooth form only relies on what male thread male thread tooth form when male and female is threadedly engaged formed flexible seal ring hard squeeze.In this way by
It is excessive and damaged in the flexible seal ring amount of being extruded.The waste for causing sealing ring, influences manufacturing schedule.
In view of above content, it is necessary to provide a kind of sealing structure that can preferably realize steel tube screw thread junction.
Summary of the invention
The utility model is in place of avoiding above-mentioned the shortcomings of the prior art, to provide a kind of threaded connection place of steel pipe
Sealing structure realizes the complete seal of threaded connection place, and sealing ring is durable.
To achieve the above object, the utility model adopts the following technical solution：
A kind of sealing structure of the threaded connection place of steel pipe, including steel pipe factory end, steel pipe scene end and box cupling, steel pipe work
It is factory end male thread that the end at factory end, which has male thread, and the end at steel pipe scene end also has male thread for live end public affairs spiral shell
Line, box cupling have box thread, and factory's end male thread of steel pipe and the box thread of box cupling one end are spirally connected, the live end male thread of steel pipe
It is spirally connected with the box thread of the box cupling other end, after two steel pipes are engaged using box cupling, the steel pipe factory end public affairs spiral shell of a steel pipe
The small end end face of line and the small end end face of the steel pipe scene end male thread of another steel pipe are closely contacted with each other；
Centered on the contact position of two steel pipes, on box cupling box thread, distance center point both sides certain distance is respectively arranged
There is a soft seal ring, the soft seal ring of live end male thread and box cupling is the first soft seal ring, factory's end male thread and box cupling
Soft seal ring be the second soft seal ring, be respectively provided with pre-threaded in first soft seal ring and the second soft seal ring；
Factory end male thread and live end male thread respectively include incomplete thread section and complete thread section；
Screw thread in first soft seal ring is matched with the complete thread section of factory's end male thread, in the second soft seal ring
Screw thread matched with the complete thread section of live end male thread.
Improvement to above-mentioned technical proposal：The male thread at steel pipe factory end and the male thread at steel pipe scene end are dextrorotation simultaneously
Screw thread or left hand thread；The screw pitch of the male thread at steel pipe factory end is less than the screw pitch of the male thread at steel pipe scene end；On box cupling
The screw pitch that box thread and the male thread at steel pipe factory end are spirally connected is less than the screw pitch being spirally connected with the male thread at steel pipe scene end.
Improvement to above-mentioned technical proposal：The incomplete thread section of male thread includes start screw threads section and tip thread segment.
Improvement to above-mentioned technical proposal：When the male thread of steel pipe scene end end is API screw thread, the length of box cupling
Less than the length of the API box cupling of the specification.
Improvement to above-mentioned technical proposal：The soft seal ring is made of flexible material.
Improvement to above-mentioned technical proposal：The steel pipe is oil pipe, casing or line pipe.
The beneficial effects of the utility model are：A kind of sealing of the threaded connection place of steel pipe provided by the utility model
Structure has threaded soft seal ring by the setting at the complete thread end of male thread, ensure that soft seal ring in male and female screw thread
Safety and integrality when cooperation, to also achieve the leakproofness of screw thread.It greatly improves work efficiency.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the utility model threaded connection place sealing structure.
Fig. 2 is the enlarged drawing in the utility model Fig. 1 in circle.
Fig. 3 is the top view of the utility model soft seal ring.
Fig. 4 is the lateral sectional view of the utility model soft seal ring.
As shown in the figure：1, box cupling, 2, live end male thread, 3, factory's end male thread, 4, soft seal ring, 4.1, first is soft close
Seal, the 4.2, second soft seal ring, D. sealing ring outer diameter.
Specific embodiment
Below with reference to specific drawings and examples, the utility model is described in further detail.
A kind of sealing structure of the threaded connection place of steel pipe, including steel pipe factory end, steel pipe scene end and box cupling 1, steel pipe
It is factory end male thread 3 that the end at factory end, which has male thread, and the end at steel pipe scene end also has male thread public for live end
Screw thread 2, box cupling 1 have box thread, and factory's end male thread 3 of steel pipe and the box thread of box cupling one end are spirally connected, the live end of steel pipe
Male thread 3 and the box thread of 1 other end of box cupling are spirally connected, after two steel pipes are engaged using box cupling, the steel pipe work of a steel pipe
The small end end face of factory's end male thread and the small end end face of the steel pipe scene end male thread of another steel pipe are closely contacted with each other；
Centered on the contact position of two steel pipes, on 1 box thread of box cupling, distance center point both sides certain distance is respectively arranged
There is a soft seal ring 4, soft seal ring of the soft seal ring 4 including live end male thread 2 and box cupling 1 is the first soft seal ring 4.1
It is the second soft seal ring 4.2 with the soft seal ring of factory's end male thread and box cupling, in the first soft seal ring and the second soft seal ring
It is respectively provided with pre-threaded；
Factory's end male thread 3 and live end male thread 2 respectively include incomplete thread section and complete thread section；
4.1 screw thread is matched with the complete thread section of factory end male thread 3 in first soft seal ring, the second soft seal ring
Screw thread on 4.2 is matched with the complete thread section of live end male thread 2.Using such fit system, imperfect section is overcome
Screw thread damage problem caused by sealing ring.
Improvement to above-mentioned technical proposal：The male thread at steel pipe factory end and the male thread at steel pipe scene end are dextrorotation simultaneously
Screw thread or left hand thread；The screw pitch of the male thread at steel pipe factory end is less than the screw pitch of the male thread at steel pipe scene end；On box cupling
The screw pitch that box thread and the male thread at steel pipe factory end are spirally connected is less than the screw pitch being spirally connected with the male thread at steel pipe scene end.
Improvement to above-mentioned technical proposal：The incomplete thread section of male thread includes start screw threads section and tip thread segment.
Improvement to above-mentioned technical proposal：When the male thread of steel pipe scene end end is API screw thread, the length of box cupling
Less than the length of the API box cupling of the specification.
Improvement to above-mentioned technical proposal：The soft seal ring is made of flexible material.
Improvement to above-mentioned technical proposal：The steel pipe is oil pipe, casing or line pipe.Steel pipe described herein can be with
It is common steel tube；But it is especially applicable to oil pipe used in oil field, casing or line pipe, because the length of this kind of pipe fitting compares
Long, the torque of receiving is especially big.
It should be noted last that the above specific embodiment is only to illustrate the technical solution of the utility model rather than limits
System, although the utility model is described in detail referring to example, those skilled in the art should understand that, it can be right
The technical solution of the utility model is modified or replaced equivalently, without departing from the spirit and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (6)
1. a kind of sealing structure of the threaded connection place of steel pipe, including steel pipe factory end, steel pipe scene end and box cupling, steel pipe factory
It is factory end male thread that the end at end, which has male thread, and the end at steel pipe scene end also has male thread for live end male thread,
Box cupling has box thread, and factory's end male thread of steel pipe and the box thread of box cupling one end be spirally connected, the live end male thread of steel pipe and
The box thread of the box cupling other end is spirally connected, which is characterized in that after two steel pipes are engaged using box cupling, the steel pipe work of a steel pipe
The small end end face of factory's end male thread and the small end end face of the steel pipe scene end male thread of another steel pipe are closely contacted with each other；
Centered on the contact position of two steel pipes, on box cupling box thread, distance center point both sides certain distance is each provided with one
The soft seal ring of a soft seal ring, live end male thread and box cupling is the first soft seal ring, factory's end male thread and box cupling it is soft
Sealing ring is the second soft seal ring, is respectively provided with pre-threaded in first soft seal ring and the second soft seal ring,
Factory end male thread and live end male thread respectively include incomplete thread section and complete thread section；
Screw thread in first soft seal ring is matched with the complete thread section of factory's end male thread, the spiral shell in the second soft seal ring
Line is matched with the complete thread section of live end male thread.
2. a kind of sealing structure of the threaded connection place of steel pipe according to claim 1, which is characterized in that steel pipe factory end
Male thread and the male thread at steel pipe scene end are right-handed thread or left hand thread simultaneously；The screw pitch of the male thread at steel pipe factory end is small
In the screw pitch of the male thread at steel pipe scene end；The screw pitch that box thread on box cupling and the male thread at steel pipe factory end are spirally connected be less than with
The screw pitch that the male thread at steel pipe scene end is spirally connected.
3. a kind of sealing structure of the threaded connection place of steel pipe according to claim 1 or claim 2, which is characterized in that the public affairs spiral shell
The incomplete thread section of line includes start screw threads section and tip thread segment.
4. a kind of sealing structure of the threaded connection place of steel pipe according to claim 1, which is characterized in that when steel pipe scene end
When the male thread of end is API screw thread, the length of box cupling is less than the length of the API box cupling of the specification.
5. a kind of sealing structure of the threaded connection place of steel pipe according to claim 1, which is characterized in that the soft seal ring
It is made of flexible material.
6. a kind of sealing structure of the threaded connection place of steel pipe according to claim 1, which is characterized in that the steel pipe is
Oil pipe, casing or line pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820711653.4U CN208152958U (en) | 2018-05-14 | 2018-05-14 | A kind of sealing structure of the threaded connection place of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820711653.4U CN208152958U (en) | 2018-05-14 | 2018-05-14 | A kind of sealing structure of the threaded connection place of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208152958U true CN208152958U (en) | 2018-11-27 |
Family
ID=64390434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820711653.4U Expired - Fee Related CN208152958U (en) | 2018-05-14 | 2018-05-14 | A kind of sealing structure of the threaded connection place of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208152958U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043196A (en) * | 2019-04-11 | 2019-07-23 | 中国石油天然气集团有限公司 | A kind of oil well pipe male connection end face seal coil structures and its assembly method |
| CN113396300A (en) * | 2019-03-27 | 2021-09-14 | 日本制铁株式会社 | Threaded joint for steel pipe |
-
2018
- 2018-05-14 CN CN201820711653.4U patent/CN208152958U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396300A (en) * | 2019-03-27 | 2021-09-14 | 日本制铁株式会社 | Threaded joint for steel pipe |
| CN110043196A (en) * | 2019-04-11 | 2019-07-23 | 中国石油天然气集团有限公司 | A kind of oil well pipe male connection end face seal coil structures and its assembly method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 |