CN201125677Y - Rolling external screw thread antisticking buckle oil well pipe - Google Patents
Rolling external screw thread antisticking buckle oil well pipe Download PDFInfo
- Publication number
- CN201125677Y CN201125677Y CNU2007201586951U CN200720158695U CN201125677Y CN 201125677 Y CN201125677 Y CN 201125677Y CN U2007201586951 U CNU2007201586951 U CN U2007201586951U CN 200720158695 U CN200720158695 U CN 200720158695U CN 201125677 Y CN201125677 Y CN 201125677Y
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- CN
- China
- Prior art keywords
- oil well
- well pipe
- thread
- screw thread
- outer thread
- 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
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Abstract
The utility model relates to a roll depression outer thread anti-galling oil well pipe, belonging to the oil artificial lift equipment field. The utility model comprises the oil well pipe body and an oil well pipe coupling, the two pipe ends of the oil well pipe body is roll depressed outer thread after processed an excircle through a special equipment, a roll depression thread enhanced layer is formed on the surface of the outer thread, a tungsten alloy anti-corrosion and wear layer is plated on the surface of the outer thread. Because of the roll depression thread enhanced layer, the metal fibre on the thread surface is streamline, which enhances the thread strength, reduces stress concentration, improves the stress state of the thread, increases the supporting capacity of the thread, and makes the oil pipe has good anti-galling performance. Because of the tungsten alloy anti-corrosion and wear layer on the outer thread surface of the two pipe ends, the anti-galling and anti-corrosion and wear performance of the outer thread of the two pipe ends is enhanced. The oil well pipe body and the oil well pipe coupling are connected to form the roll depression outer thread anti-galling oil well pipe, when using in the well, multi roll depression outer thread anti-galling oil well pipe can be connected into an oil well pipe column according to demand.
Description
Affiliated technical field
A kind of roll extrusion external screw thread antigalling compound well casing belongs to petroleum machinery oil production equipment field.
Background technology
At present, the main method that adopts the cutting of pipe threading machine lathe tool of oil well pipe thread processing, low, the intensity difference of taper thread screw thread precision that processes, often go into the well in the use by bending stress and produce fatigue failure, especially the thread gluing problem of oil well pipe and oil well pipe box cupling is a difficult problem that exists in domestic each elephant well construction always, therefore, improving oil well pipe thread screw thread machining accuracy, screw strength and anticorrosion antiwear performance is to prolong the oil well pipe key in application life.
Summary of the invention
The purpose of this utility model is, the intensity difference low at existing oil well pipe thread screw thread precision and the easy deficiency of thread gluing, a kind of roll extrusion external screw thread antigalling compound well casing is provided, can effectively improve screw thread screw thread precision, screw strength and anticorrosion antiwear performance, prevent and the thread gluing of oil well pipe box cupling, prolong the application life of oil well pipe.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of roll extrusion external screw thread antigalling compound well casing comprises oil well pipe body and oil well pipe box cupling, the two ends tube head of oil well pipe body is by rolled thread behind the special equipment processing excircles, form the high strength external screw thread, be formed with the rolled thread strengthening layer on the external screw thread top layer, then at the two ends of oil well pipe body tube head external threaded surface plating one deck tungsten alloy anticorrosion antiwear layer, oil well pipe body and oil well pipe box cupling connect to form single roll extrusion external screw thread antigalling compound well casing, go into the well when using, many single roll extrusion external screw thread antigalling compound well casings can be in turn connected into oil well pipe according to demand.
The beneficial effects of the utility model are: 1, the two ends tube head external screw thread roll forming of oil well pipe body, be formed with the rolled thread strengthening layer on the external screw thread top layer, screw thread top layer metallic fiber is streamlined, strengthened screw strength, having reduced stress concentrates, improved the screw thread force-bearing situation, increased the supporting capacity of screw thread, made oil pipe have good sticky thread resistance energy.2, the two ends tube head external threaded surface of oil well pipe body has the existence of tungsten alloy anticorrosion antiwear layer, can improve the externally threaded anti-thread gluing of two ends tube head and the anticorrosion antiwear performance of oil well pipe body.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an external screw thread tooth form structure for amplifying sketch of the present utility model.
1. oil well pipe bodys among the figure, 2. oil well pipe box cupling, 3. rolled thread strengthening layer, 4. tungsten alloy anticorrosion antiwear layer.
The specific embodiment
The purpose of this utility model can reach in the following manner:
The utility model comprises oil well pipe body (1) and oil well pipe box cupling (2), the two ends tube head external screw thread of oil well pipe body (1) by the special equipment processing excircles after roll extrusion form, be formed with rolled thread strengthening layer (3) on the external screw thread top layer, the two ends tube head external threaded surface of oil well pipe body (1) is coated with one deck tungsten alloy anticorrosion antiwear layer (4), and the thickness of tungsten alloy anticorrosion antiwear layer (4) is 0.02～0.30mm.
Claims (2)
1, a kind of roll extrusion external screw thread antigalling compound well casing comprises oil well pipe body (1) and oil well pipe box cupling (2), it is characterized in that: there is rolled thread strengthening layer (3) on the tube head external screw thread top layer, two ends of oil well pipe body (1), and the two ends tube head external threaded surface of oil well pipe body (1) has one deck tungsten alloy anticorrosion antiwear layer (4).
2, a kind of roll extrusion external screw thread antigalling compound well casing according to claim 1, its feature also is: the thickness of tungsten alloy anticorrosion antiwear layer (4) is 0.02～0.30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201586951U CN201125677Y (en) | 2007-12-21 | 2007-12-21 | Rolling external screw thread antisticking buckle oil well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201586951U CN201125677Y (en) | 2007-12-21 | 2007-12-21 | Rolling external screw thread antisticking buckle oil well pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125677Y true CN201125677Y (en) | 2008-10-01 |
Family
ID=39999148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201586951U Expired - Lifetime CN201125677Y (en) | 2007-12-21 | 2007-12-21 | Rolling external screw thread antisticking buckle oil well pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125677Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401493A (en) * | 2016-11-28 | 2017-02-15 | 无锡金顶石油管材配件制造有限公司 | Anti-thread-gluing oil pipe coupling |
| CN106401494A (en) * | 2016-11-28 | 2017-02-15 | 无锡金顶石油管材配件制造有限公司 | Coupling for preventing blockage of petroleum pipelines |
-
2007
- 2007-12-21 CN CNU2007201586951U patent/CN201125677Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401493A (en) * | 2016-11-28 | 2017-02-15 | 无锡金顶石油管材配件制造有限公司 | Anti-thread-gluing oil pipe coupling |
| CN106401494A (en) * | 2016-11-28 | 2017-02-15 | 无锡金顶石油管材配件制造有限公司 | Coupling for preventing blockage of petroleum pipelines |
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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: 20081001 |