CN2430538Y - High connection strength round thread connection structure for oil field sleeve and oil pipe - Google Patents
High connection strength round thread connection structure for oil field sleeve and oil pipe Download PDFInfo
- Publication number
- CN2430538Y CN2430538Y CN 00236810 CN00236810U CN2430538Y CN 2430538 Y CN2430538 Y CN 2430538Y CN 00236810 CN00236810 CN 00236810 CN 00236810 U CN00236810 U CN 00236810U CN 2430538 Y CN2430538 Y CN 2430538Y
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- thread
- taper
- round
- threads
- round thread
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Abstract
The utility model relates to a high connection strength round thread connecting structure for oil field sleeve pipes and oil pipes. The pipe threads of the utility model are taper pipe threads, and the utility model is composed of thread-shaped complete API round threads and black skin round threads which are connected with the thread-shaped complete API round threads. The black skin area of a tooth top and the diameter of a tooth root of the black skin round thread are increased following the increase of the pitch diameter of the taper pipe threads, and the tooth height of the black skin round thread is reduced following the increase of the black skin area of the tooth top. Coupling threads are taper round threads which are matched with the taper pipe threads, a coupling connection pipe hole is composed of an opposite buckling taper hole and a connecting hole which is connected with the opposite buckling taper hole, and the coupling taper round threads are manufactured on the walls of the taper hole and the connecting hole. The utility model is used for high connection strength of the oil field sleeve pipes and the oil pipes, and avoids the generation of the phenomena of thread gluing and incomplete buckling.
Description
The utility model relates to a kind of sleeve in oil field, oil pipe round thread syndeton.
At present to connect all be to adopt box cupling to be threaded for sleeve in oil field, oil pipe, and more in being threaded of sleeve in oil field, oil pipe is to adopt API (American Petroleum Institute (API)) standard round screw connection structure.The gas thread that the API round thread connects is 60 ° of angle of threads, 1: 16 taper pipe thread of diameter taper.Its advantage is a handling ease, and is easy to use, good airproof performance.But the API round thread only is threaded with complete, the weakened attenuate of last tooth place thickness of steel pipe that is threaded at steel pipe a tooth height.For tooth apart from being 1.81mm for the sleeve pipe of 3.175mm and oil pipe, is 1.412mm for the tooth distance for the oil pipe of 2.54mm, thereby the steel pipe bonding strength is descended greatly, the utmost point is unfavorable for the safe handling of sleeve pipe, oil pipe, moreover, adopt the two ends cylindricality bore hole of the box cupling of API round thread connection to be connected with female connecting hole by bellmouth, cylindricality bore hole wall is the light face, thereby on the box cupling structure threadless disconnected part box cupling to occupy ratio on the whole big, the butt tube bonding strength has produced totally unfavorable influence.
The purpose of this utility model provides a kind of intensity height, good seal performance of being threaded, handling ease, and sleeve in oil field easy to use, oil pipe are with high bonding strength round thread syndeton.
Sleeve in oil field, oil pipe are 60 ° of angle of threads with the gas thread of high bonding strength round thread syndeton, 1: 16 taper pipe thread of diameter taper.Taper pipe thread constitutes by the complete API round thread of thread form with casting skin round thread that crest that the API round thread continues is keeping the steel tube surface casting skin.Casting skin round thread root of the tooth footpath increases with the increase of taper pipe thread pitch diameter, and casting skin round thread crest casting skin area directly increases with casting skin round thread root of the tooth and increases, and casting skin round thread tooth height increases with casting skin round thread crest casting skin area and reduces.The box cupling screw thread is 60 ° for the angle of thread that cooperates with taper pipe thread, and diameter taper is the complete taper round thread of 1: 16 thread form.Box cupling is taken over the hole and is made of make-up taper hole and connected connecting hole, and box cupling taper round thread is produced on taper hole and the connecting hole wall.
When the high bonding strength circle of the sleeve in oil field that the utility model provides, oil pipe line syndeton is used for the connection of sleeve in oil field, oil pipe, steel pipe last tooth that is threaded is the incomplete imperfect tooth of thread form that crest remains with the steel tube surface casting skin, its root of the tooth is very shallow to have significantly reduced the weakening of thickness of steel pipe herein, thereby has improved the intensity that is threaded greatly.Box cupling has saved the cylindricality bore hole of light wall, and be shaped on screw thread on the order box cupling make-up taper hole wall surface of the hole, not only reduce the ratio of the disconnected part of box cupling but also increased connecting thread length, thereby when having reduced the screw thread radial interference and having connected between box cupling and steel pipe unit be connected interaction force on the length, further improved the intensity that is threaded.Moreover, the box cupling screw thread was to steel pipe screw thread scraping casting skin tooth side and root of the tooth when steel pipe was connected with box cupling screw thread radial interference, because the very for a short time iron filings that chip away of scraping of the shallow scraping amount of casting skin alveolus are filled in the space at steel pipe black threads crest place, thereby avoided the generation of the thread gluing and the incomplete phenomena that links closely.
Accompanying drawing is embodiment of the present utility model, further specifies the utility model below in conjunction with embodiment.
Fig. 1 is box cupling and the steel pipe screw connection structure figure that sleeve in oil field, oil pipe are used high strength round thread syndeton.
Fig. 2 is the A portion partial enlarged drawing of Fig. 1.
As shown in the figure, sleeve in oil field, oil pipe are that angle of thread is 60 ° with the steel pipe (1) of high bonding strength round thread syndeton, the gas thread of (2), and diameter taper is 1: 16 a taper pipe thread.Taper pipe thread constitutes by the complete API round thread (6) of thread form with casting skin round thread (5) that crest that the API round thread continues is keeping steel tube surface casting skin (7), casting skin round thread root of the tooth footpath increases with the increase of taper pipe thread pitch diameter, casting skin round thread crest casting skin area increases with the increase in casting skin round thread root of the tooth footpath, and casting skin round thread tooth height reduces with the increase of casting skin round thread crest casting skin area.Box cupling (2) screw thread is 60 ° for the angle of thread that cooperates with gas thread, and diameter taper is the complete taper round thread of 1: 16 thread form.It is 65 ° make-up taper hole (8) and connected connecting hole (3) formation by tapering that box cupling is taken over the hole, and box cupling taper round thread is produced on taper hole and the connecting hole wall.
Claims (1)
1, a kind of sleeve in oil field, oil pipe is with high bonding strength round thread syndeton, it is characterized in that gas thread is 60 ° of angle of threads, 1: 16 taper pipe thread of diameter taper, taper pipe thread constitutes by the complete API round thread of thread form with black threads that crest that the API round thread continues is keeping the steel tube surface casting skin, black threads root of the tooth footpath increases with the increase of taper pipe thread pitch diameter, casting skin round thread crest casting skin area increases with the increase in casting skin round thread root of the tooth footpath, casting skin round thread tooth height reduces with the increase of casting skin round thread crest casting skin area, the box cupling screw thread is 60 ° for the angle of thread that cooperates with taper pipe thread, diameter taper is the complete taper round thread of 1: 16 thread form, box cupling is taken over the hole and is made of make-up taper hole and connected connecting hole, and box cupling taper round thread is produced on taper hole and the connecting hole wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00236810 CN2430538Y (en) | 2000-05-29 | 2000-05-29 | High connection strength round thread connection structure for oil field sleeve and oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00236810 CN2430538Y (en) | 2000-05-29 | 2000-05-29 | High connection strength round thread connection structure for oil field sleeve and oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2430538Y true CN2430538Y (en) | 2001-05-16 |
Family
ID=33598276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00236810 Expired - Fee Related CN2430538Y (en) | 2000-05-29 | 2000-05-29 | High connection strength round thread connection structure for oil field sleeve and oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2430538Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439282A (en) * | 2016-09-12 | 2017-02-22 | 辽宁四方核电装备股份有限公司 | Nuclear power pipe joint |
-
2000
- 2000-05-29 CN CN 00236810 patent/CN2430538Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439282A (en) * | 2016-09-12 | 2017-02-22 | 辽宁四方核电装备股份有限公司 | Nuclear power pipe joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |