CN201159054Y - Expansible screw connection mechanism - Google Patents
Expansible screw connection mechanism Download PDFInfo
- Publication number
- CN201159054Y CN201159054Y CNU2008200788715U CN200820078871U CN201159054Y CN 201159054 Y CN201159054 Y CN 201159054Y CN U2008200788715 U CNU2008200788715 U CN U2008200788715U CN 200820078871 U CN200820078871 U CN 200820078871U CN 201159054 Y CN201159054 Y CN 201159054Y
- Authority
- CN
- China
- Prior art keywords
- thread
- internal thread
- groove
- grafting
- threaded connection
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Landscapes
- Gasket Seals (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
An expansible thread connecting mechanism comprises a female screw and a male thread which are matched with each other on two abutting ends, and is characterized in that an annular seal groove is processed on the inner end of the female screw, a precise retainer ring and an O-shaped seal ring are installed in the seal groove, an plugging flange which is along the axial direction of the periphery is arranged on the top end of the male thread, an plugging groove which is matched with the plugging flange and is along the periphery is arranged on the corresponding position of the inner end of the female thread, and protective sleeves are installed on the periphery surfaces of the female screw and the male thread. The utility model has the advantages that the connecting position of the threads can keep the connecting intensity and can realize the sealing after the expansion of an expansion tube.
Description
Technical field
The utility model relates to the maintenance of equipment of in a kind of oil exploitation process the reparation of expansion tube sleeve pipe being grown the section casing damaged well, specifically is a kind of expandable threaded connection, is used for the connection between the expansion tube body.
Background technology
In the long section of expansion tube sleeve pipe reparation casing damaged well technology, the problem of a key is exactly the connection between the expansion tube body.Prior art is used common being threaded, and after this volume expansion of expansion tube, can't keep original screw strength and sealing performance at all.Generally adjust the screw thread inclination angle and realize that its difficulty of processing is relative with processing cost higher.
Summary of the invention
The purpose of this utility model just provides a kind of expandable threaded connection, can't keep original screw strength and sealing performance with what the solution prior art existed, and the relative problem of higher with processing cost of difficulty of processing.
The technical solution of the utility model is: comprise being located at internal thread and the external screw thread that two butt ends cooperatively interact, it is characterized in that: the inner at described internal thread is processed with annular seal groove, and accurate back-up ring and O-ring seals are housed in the sealing groove.
Be provided with axial grafting flange on described externally threaded top, be provided with the grafting groove that cooperates with this grafting flange in the corresponding position of internal thread the inner along circumference along circumference.
On described internal thread and externally threaded outer peripheral face, protective sleeve is installed.
The utility model has the advantages that: can keep the bonding strength of screw thread in expansion tube expansion rear thread junction, can also realize sealing.
Description of drawings
Fig. 1 is a general structure cross-sectional schematic of the present utility model;
Fig. 2 is the enlarged drawing at I place among Fig. 1.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the utility model comprises and is located at internal thread 1 and the external screw thread 2 that two butt ends cooperatively interact that it is characterized in that: the inner at described internal thread is processed with annular seal groove, and accurate back-up ring 5 and O-ring seals 4 are housed in the sealing groove.The effect of this precision back-up ring 5 and O-ring seals 4 is by continuing to realize sealing behind the connection of thread in expansion cone.
Be provided with axial grafting flange 6 on the top of described external screw thread 2, be provided with the grafting groove 7 that cooperates with this grafting flange 6 in the corresponding position of internal thread 1 the inner along circumference along circumference.
On the outer peripheral face of described internal thread 1 and external screw thread 2 protective sleeve 3 is installed, its effect is that the outer peripheral face that prevents the expansion tube connection of thread scratches in transferring process, causes expansion tube to tear phenomenon when expanding.
The utility model in use, the internal thread of two expansion tubes of butt joint 1 interconnects with external screw thread 2, and the grafting flange 6 of external screw thread 2 is inserted in the grafting groove 7 of internal threads 1, its effect is to prevent that after expansion tube expands endoporus from shrinking.
Claims (3)
1, a kind of expandable threaded connection comprises being located at internal thread and the external screw thread that two butt ends cooperatively interact that it is characterized in that: the inner at described internal thread is processed with annular seal groove, and accurate back-up ring and O-ring seals are housed in the sealing groove.
2, expandable threaded connection according to claim 1, it is characterized in that: be provided with axial grafting flange on described externally threaded top, be provided with the grafting groove that cooperates with this grafting flange in the corresponding position of internal thread the inner along circumference along circumference.
3, expandable threaded connection according to claim 1 and 2 is characterized in that: on described internal thread and externally threaded outer peripheral face protective sleeve is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200788715U CN201159054Y (en) | 2008-01-31 | 2008-01-31 | Expansible screw connection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200788715U CN201159054Y (en) | 2008-01-31 | 2008-01-31 | Expansible screw connection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201159054Y true CN201159054Y (en) | 2008-12-03 |
Family
ID=40109640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200788715U Expired - Lifetime CN201159054Y (en) | 2008-01-31 | 2008-01-31 | Expansible screw connection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201159054Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2509863C1 (en) * | 2012-12-11 | 2014-03-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Connection of shaped tubes of shutters of wells |
| CN105422019A (en) * | 2015-12-09 | 2016-03-23 | 中国石油集团石油管工程技术研究院 | Rapid buckling threaded structure for expansion pipe in large expansion rate and machining and preparing method |
| CN119957739A (en) * | 2023-11-08 | 2025-05-09 | 中国石油天然气集团有限公司 | An expandable threaded connection mechanism, an expansion pipe, and a patching process pipe column and method |
-
2008
- 2008-01-31 CN CNU2008200788715U patent/CN201159054Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2509863C1 (en) * | 2012-12-11 | 2014-03-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Connection of shaped tubes of shutters of wells |
| CN105422019A (en) * | 2015-12-09 | 2016-03-23 | 中国石油集团石油管工程技术研究院 | Rapid buckling threaded structure for expansion pipe in large expansion rate and machining and preparing method |
| CN119957739A (en) * | 2023-11-08 | 2025-05-09 | 中国石油天然气集团有限公司 | An expandable threaded connection mechanism, an expansion pipe, and a patching process pipe column and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081203 |