CN202249805U - Anti-tripping connecting device for hollow sucker rod - Google Patents
Anti-tripping connecting device for hollow sucker rod Download PDFInfo
- Publication number
- CN202249805U CN202249805U CN 201120355555 CN201120355555U CN202249805U CN 202249805 U CN202249805 U CN 202249805U CN 201120355555 CN201120355555 CN 201120355555 CN 201120355555 U CN201120355555 U CN 201120355555U CN 202249805 U CN202249805 U CN 202249805U
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- rod
- sucker rod
- collar
- head
- hollow
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Abstract
The utility model relates to an anti-tripping connecting device for a hollow sucker rod, which aims at overcoming the deficiencies of more anti-tripping parts and complex structure of the existing hollow sucker rod. An internal thread collar is arranged at one end of the hollow sucker rod, an external thread rod head is arranged at the other end of the hollow sucker rod, an external thread of the rod head and an internal thread of the collar of the hollow sucker rod are sequentially connected for constituting an oil pumping pipe string, a plain shaft (4) is arranged at the front end of the thread of the rod head (2) of the sucker rod, and the front end surface (3) of the plain shaft (4) is an inclined plane; a collar (1) of the sucker rod comprises an inner hole and an inclined plane, which are matched with the rod head (2) of the sucker rod; and a gap is arranged between the plain shaft (4) of the rod head (2) of the sucker rod and the corresponding inner hole of the collar (1) of the sucker rod in the radial direction, and the front end surface (3) of the rod head (2) of the sucker rod is in contact with the corresponding inclined plane of the collar (1) of the sucker rod. The anti-tripping connecting device disclosed by the utility model has the benefits of being simple and reasonable in structure, preventing the threads from becoming loose due to complete loss of pre-tightening force along with the increase in times of vibration, further playing a role of preventing the threads from becoming loose, and effectively avoiding falling well accidents after tripping of the sucker rod.
Description
Technical field
The utility model relates to a kind of pumping rod connecting device, especially relates to a kind of hollow rod anti-tripping connecting device.
Background technology
Sucker-rod pumping is one of oil production method of generally adopting of petroleum industry, is prevailing artificial lift mode in petroleum production engineering.
Ground driving screw pump is made up of parts such as screw pump, hollow rod, controllers.Wherein, hollow rod is the vitals that the ground screw pump drives oil production equipment, and it to the down-hole, drives the rotor rotation with the transmission of power of surface drive (screw pump), realizes the pumping campaign.Tens of or hundreds of sucker rods connect to form rod string through box cupling.Hollow rod also can utilize this passage to carry out production test because the inner through channel that forms can heat through the crude oil of means such as steam in jection to the oil well mouth, is widely used in viscous crude, high oil and the content of wax oil well etc. of coagulating.Hollow rod can be formed with extracting device of oil such as beam pumping unit, screw pumps has rod recovering system, bears the effect of transmitting axial load or transfer torque.The ability and the bending resistance of hollow rod transfer torque are superior to solid sucker rod, therefore obtain application more and more widely.The field finds that disconnected the taking off of hollow rod is the main cause that causes workover treatment.One end of general hollow rod is the sucker rod external screw thread, and an end is a box cupling, does not have special anticreep measure.Chinese patent ZL95223855.1 has proposed a kind of plug-in type hollow rod; Its structure is that a joint sucker rod tooth body forms embedded the connection with the cell body of another sucker rod; Though play the purpose of anticreep; But owing to receive the restriction of sucker rod physical dimension, the intensity of cell body and tooth body is difficult to guarantee, and then has influenced the bulk strength that sucker rod connects.Chinese patent ZL98220976.2 has also proposed a kind of anti-breaking and has taken off sucker rod, and it comprises top connection, lower contact and the body of rod.Body of rod end connects carrier head up and down, and pin thread box cupling and box box cupling are housed on it, and it is fixed that the pin thread box cupling is equipped with spring, tooth cover, spacer pin outward.The tooth down of carrier head end is meshing with each other up and down, bears torsion, and the tooth cover is meshing with each other with box box cupling tooth, prevents to release.In addition, also have forms such as double step sucker rod, these hollow rod structures all can play the anticreep effect, all are to utilize external mechanism or parts to play the anticreep effect, and there is some difference with traditional sucker rod operating habit, and component are many, complex structure.
The utility model content
In order to overcome anti-many, the baroque deficiencies of dropout component of existing hollow rod, the utility model provides a kind of hollow rod anti-tripping connecting device.
The utility model solves the technical scheme that its technical problem adopted: hollow rod one end is the internal thread box cupling; The other end is the external thread rod head; The bar head external screw thread and the box cupling internal thread of hollow rod connect to form pumping pipe string successively; The screw thread front end of sucker rod head is an optical axis, and the front end face of optical axis is the inclined-plane; Rod collar has match with sucker rod head endoporus, inclined-plane; Radially gapped between the corresponding endoporus with rod collar of the optical axis of sucker rod head, the front end face of sucker rod head contacts with the inclined surface of rod collar.The angle of the inclined-plane of front end face and sucker rod axis＜90 °.The front end face that sucker rod head cooperates with rod collar can also be sphere.
The beneficial effect of the utility model is, and is simple and reasonable for structure, can not increase with vibration number; Lose pretightning force fully; Cause screw thread to get loose, thereby play the locking thread effect, realize the anti-dropout function of sucker rod; Effectively avoid falling behind the pumping rod disengaging generation of well accident improves the security performance of hollow rod work.
Description of drawings
Fig. 1 is the utility model hollow rod anti-tripping connecting device structural representation.
Among the figure: 1. rod collar, 2. sucker rod head, 3. front end face, 4. optical axis.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.But what those skilled in the art should know is that the utility model is not limited to the listed specific embodiment, as long as meet the spirit of the utility model, all should be included in the protection domain of the utility model.
The utility model hollow rod anti-tripping connecting device, hollow rod one end is the internal thread box cupling, and the other end is the external thread rod head, and the bar head external screw thread and the box cupling internal thread of hollow rod connect to form pumping pipe string successively.The screw thread front end of sucker rod head 2 is an optical axis 4, and the front end face 3 of optical axis 4 is the inclined-plane; Rod collar 1 has match with sucker rod head 2 endoporus, inclined-plane; The angle of the inclined-plane of front end face 3 and sucker rod axis＜90 °.Radially gapped between the optical axis 4 of sucker rod head 2 and the rod collar 1 corresponding endoporus.When sucker rod head 2 and rod collar 1 through being threaded, the front end face 3 of sucker rod head 2 applies certain pretightning force with after the inclined surface of rod collar 1 contacts.
The front end face 3 that sucker rod head 2 cooperates with rod collar 1 also can be that sphere cooperates.
The utility model is that the elastic deformation energy stored utilizing hollow rod to be threaded to produce in the process of screwing is to playing the locking thread effect; And then solution hollow rod anticreep problem; Through changing the structure of sucker rod connecting portion, do not increase all the other component.Two effects are played in sucker rod head 2 ends and rod collar 1 contact surface junction, and the one, can be through face contact (or line contact) transfer torque.The 2nd, under the effect of axial force, make sucker rod head 2 ends in elastic range, produce elastic deformation, storage power, double thread is implemented locking, and then reaches the purpose of hollow rod anticreep.
It should be noted that the foregoing description is example and unrestricted the utility model, those skilled in the art can design a lot of alternate embodiments and not break away from the claim scope of this patent.
Claims (3)
1. hollow rod anti-tripping connecting device; Hollow rod one end is the internal thread box cupling; The other end is the external thread rod head; The bar head external screw thread and the box cupling internal thread of hollow rod connect to form pumping pipe string successively, it is characterized in that: the screw thread front end of sucker rod head (2) is optical axis (4), and the front end face (3) of optical axis (4) is the inclined-plane; Rod collar (1) has match with sucker rod head (2) endoporus, inclined-plane; Radially gapped between the optical axis (4) of sucker rod head (2) and the corresponding endoporus of rod collar (1), the front end face (3) of sucker rod head (2) contacts with the inclined surface of rod collar (1).
2. according to the said hollow rod anti-tripping connecting device of claim 1, it is characterized in that: the inclined-plane of said front end face (3) and angle＜90 of sucker rod axis °.
3. according to the said hollow rod anti-tripping connecting device of claim 1, it is characterized in that: the front end face (3) that said sucker rod head (2) cooperates with rod collar (1) is a sphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120355555 CN202249805U (en) | 2011-09-22 | 2011-09-22 | Anti-tripping connecting device for hollow sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120355555 CN202249805U (en) | 2011-09-22 | 2011-09-22 | Anti-tripping connecting device for hollow sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249805U true CN202249805U (en) | 2012-05-30 |
Family
ID=46111064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120355555 Expired - Fee Related CN202249805U (en) | 2011-09-22 | 2011-09-22 | Anti-tripping connecting device for hollow sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249805U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733761A (en) * | 2012-06-27 | 2012-10-17 | 葫芦岛龙源采油配套设备有限公司 | Pumping rods with miter rod heads |
-
2011
- 2011-09-22 CN CN 201120355555 patent/CN202249805U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733761A (en) * | 2012-06-27 | 2012-10-17 | 葫芦岛龙源采油配套设备有限公司 | Pumping rods with miter rod heads |
| CN102733761B (en) * | 2012-06-27 | 2015-05-13 | 葫芦岛龙源采油配套设备有限公司 | Pumping rods with miter rod heads |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150922 |
|
| EXPY | Termination of patent right or utility model |