CN202946035U - High-connection-strength deformation-resistant oil pipe - Google Patents
High-connection-strength deformation-resistant oil pipe Download PDFInfo
- Publication number
- CN202946035U CN202946035U CN 201220676884 CN201220676884U CN202946035U CN 202946035 U CN202946035 U CN 202946035U CN 201220676884 CN201220676884 CN 201220676884 CN 201220676884 U CN201220676884 U CN 201220676884U CN 202946035 U CN202946035 U CN 202946035U
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- pipe
- oil pipe
- heads
- oil
- deformation
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Abstract
The utility model relates to a high-connection-strength deformation-resistant oil pipe, belonging to the field of petroleum machinery oil extraction equipment. The oil pipe is composed of a pipe body, pipe heads at both ends of the pipe body, and a coupling, and is characterized in that the pipe body and the outer surfaces of the pipe heads at both ends of the pipe body are provided with quench hardening layers; the pipe heads at both ends of the pipe body are of outer thickening structures, and the ratio of the wall thickness of the pipe heads at both ends to the wall thickness of the pipe body is in the range 1.01-3; and the coupling is in threaded connection with the pipe heads. Compared with the existing oil pipe, as the pipe body and the outer surfaces of the pipe heads at both ends of the pipe body are provided with the quench hardening layers, the deformation-resistant strength of the oil pipe is increased; As the pipe heads at both ends of the pipe body are of outer thickening structures, the nominal diameter of the pipe head threads is increased, namely, the load area of the pipe head threads is increased, so the bearing capacity and deformation resistance of the pipe head threads are improved, and the problem that the pipe head threads are relatively weak is solved. Thus, the service life of the oil pipe can be prolonged.
Description
Affiliated technical field
The utility model belongs to petroleum machinery oil production equipment field, and what be specifically related to is a kind of oil extraction in oil field or fluid injection body medium with high bonding strength resistance to deformation oil pipe.
Background technology
Modern oil exploitation is widely used the method for mechanical oil recovery, recovers the oil or the large multiplex oil pipe of fluid injection body medium.When oil and gas development, existing oil pipe bears the synergy of multiple load and different corrosive mediums at work, greatly reduces the application life of oil pipe.Along with domestic petroleum exploitation progresses into the middle and later periods, oil well is in continuous intensification, to the requirement of oil pipe intensity also in continuous raising, existing widely used oil pipe, the threaded portion bit comparison of its tube head is weak, also often causes occuring down-hole accident.Therefore, for satisfy the large pump in oil field, adopt by force, dark well recovery hole condition demand, processing and manufacturing has the oil pipe of resistance to deformation, high bonding strength, is to extend the oil pipe key in application life.
Summary of the invention
In order to improve oil pipe resistance to deformation intensity, screw thread anti-deformation, the utility model provides a kind of technical scheme of high bonding strength resistance to deformation oil pipe, the technical program is simple in structure, is well positioned to meet existing producing well to the requirement of oil pipe resistance to deformation intensity, screw thread anti-deformation.
The utility model is achieved in that a kind of high bonding strength resistance to deformation oil pipe, and it is made of tube head, the box cupling at body, body two ends, it is characterized in that, the external surface of the tube head at body and body two ends has one deck quench-hardened case.
The tube head at described body two ends is the external upset (EU) structure, and the tube head wall thickness at two ends is 1.01～3 with the scope of the ratio of body wall thickness.
Described box cupling is connected with the mode that tube head is threaded connection.
The beneficial effects of the utility model are: compare with existing oil pipe, the external surface of the tube head at body and body two ends has one deck quench-hardened case, has improved the resistance to deformation intensity of oil pipe; The tube head at body two ends is the external upset (EU) structure, has increased tube head screw thread nominal diameter, has namely increased the loaded area of tube head screw thread, has therefore improved bearing capacity and the anti-deformation of tube head screw thread, has solved the problem of tube head threaded portion bit comparison weakness.Thereby can extend the application life of oil pipe.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the sectional drawing of the utility model A-A.
In figure: 1. box cupling, 2. tube head, 3. body, 4. quench-hardened case.
Specific embodiment
As shown in drawings, the utility model is made of tube head (2), the box cupling (1) at body (3), body (3) two ends, it is characterized in that, body (3) has one deck quench-hardened case (4) with the external surface of the tube head (2) at body (3) two ends.
The tube head (2) at body (3) two ends is the external upset (EU) structure, and the scope of the ratio of the tube head at two ends (2) wall thickness and body (3) wall thickness is 1.01～3.
Box cupling (1) is connected with the mode that tube head (2) is threaded connection.
Claims (3)
1. one kind high bonding strength resistance to deformation oil pipe, it is made of tube head, the box cupling at body, body two ends, it is characterized in that, and the external surface of the tube head at body and body two ends has one deck quench-hardened case.
2. a kind of high bonding strength resistance to deformation oil pipe according to claim 1, be further characterized in that, the tube head at described body two ends is the external upset (EU) structure, and the tube head wall thickness at two ends is 1.01～3 with the scope of the ratio of body wall thickness.
3. a kind of high bonding strength resistance to deformation oil pipe according to claim 1, be further characterized in that, described box cupling is connected with the mode that tube head is threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676884 CN202946035U (en) | 2012-12-08 | 2012-12-08 | High-connection-strength deformation-resistant oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676884 CN202946035U (en) | 2012-12-08 | 2012-12-08 | High-connection-strength deformation-resistant oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946035U true CN202946035U (en) | 2013-05-22 |
Family
ID=48421742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220676884 Expired - Lifetime CN202946035U (en) | 2012-12-08 | 2012-12-08 | High-connection-strength deformation-resistant oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946035U (en) |
-
2012
- 2012-12-08 CN CN 201220676884 patent/CN202946035U/en not_active Expired - Lifetime
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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 |
Granted publication date: 20130522 |
|
| CX01 | Expiry of patent term |