CN203570216U - Multi-cambered surface rotator sucker rod coupling - Google Patents
Multi-cambered surface rotator sucker rod coupling Download PDFInfo
- Publication number
- CN203570216U CN203570216U CN201320724608.XU CN201320724608U CN203570216U CN 203570216 U CN203570216 U CN 203570216U CN 201320724608 U CN201320724608 U CN 201320724608U CN 203570216 U CN203570216 U CN 203570216U
- Authority
- CN
- China
- Prior art keywords
- sucker rod
- rod coupling
- oil pipe
- rotator
- cambered surface
- 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
- 230000008878 coupling Effects 0.000 title abstract 12
- 238000010168 coupling process Methods 0.000 title abstract 12
- 238000005859 coupling reaction Methods 0.000 title abstract 12
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000003129 oil well Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The utility model relates to a multi-cambered surface rotator sucker rod coupling in the field of sucker rod connecting devices. The multi-cambered surface rotator sucker rod coupling comprises a sucker rod coupling body arranged in an oil pipe, a screw cap is arranged on the periphery of the upper end portion of the sucker rod coupling body, a rotator is arranged on the lower portion of the screw cap on the periphery of the sucker rod coupling body, the inside diameter of the rotator is matched with the outside diameter of the sucker rod coupling body, a gap is reserved between the rotator and the oil pipe, the outer working face of the coupling includes at least three sections of arc surfaces, and the curvature radius of each section of the arc surface is matched with the curvature radius of the inner wall of the oil pipe. The multi-cambered surface rotator sucker rod coupling is simple in structure, contact stress between the sucker rod coupling and the oil pipe is effectively reduced during borehole operation, eccentric abrasion resistance of the sucker rod coupling is improved, abrasion of the sucker rod coupling to the oil pipe is reduced, the service life of the oil pipe and the service life of a sucker rod are prolonged, and the purpose of prolonging the production cycle of an oil well is achieved.
Description
Technical field
The utility model relates to a kind of petroleum industry sucker rod pumping equipment, particularly pumping rod connecting device in a kind of down-hole oil tube.
Background technology
In the sucker rod pumping system of existing oil field, rod string is to be all formed by connecting by box cupling by many sucker rods.Rod string pumps for a long time in down-hole oil tube, and rod string just inevitably produces friction with tube inner wall, especially more outstanding in inclined shaft, extended reach well, and the wearing and tearing of rod string are mainly box cupling wearing and tearing.The outer work plane of existing rod collar is the face of cylinder, it when work plane outside rod collar contacts with tube inner wall, is line contact, serious wear mutually, tend to cause the phenomenons such as rod string is disconnected de-at box cupling place, the worn out oil pipe of rod string, thereby be forced to close a well in, carry out workover treatment, to oil field, cause larger economic loss.
Utility model content
The problem that the utility model exists for prior art, a kind of multi-cambered surface rotary body rod collar is provided, be intended to reduce the contact stress between rod collar and oil pipe, improve the anti-eccentric wear performance of rod collar, alleviate the wearing and tearing of rod collar to oil pipe simultaneously, reach the object that extends the oil well production cycle.
The utility model is achieved in that a kind of multi-cambered surface rotary body rod collar, comprise the rod collar body being arranged in oil pipe, rod collar body upper end periphery is provided with nut, rod collar body periphery nut bottom is provided with rotary body, rotary body internal diameter matches with this body diameter of rod collar, between described rotary body and oil pipe, leave gap, the outer work plane of rotary body has 3 sections of above arc surfaces at least, and the radius of curvature of described every section of arc surface and tube inner wall radius of curvature match.
During work, sucker rod pumps in well, and under the positive pressure between oil pipe and sucker rod, sucker rod contacts with tube inner wall by multi-cambered surface rotary body is outer.Because radius of curvature and the tube inner wall radius of curvature of the outer work plane of this rotary body match, therefore oil pipe is face contact with contacting of rod collar, having changed arc surface box cupling in the past contacts with the line of tube inner wall, stress while having effectively reduced underground work between rotary body and oil pipe unit area, improved the anti-eccentric wear performance of rod collar, reduce the wearing and tearing of rod collar to oil pipe, increased the application life of oil pipe and sucker rod, reached the object that extends the oil well production cycle.
As further improvement of the utility model, for ease of processing and manufacturing, the outer work plane of described rotary body is 3-6 section work plane.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model and the schematic diagram that contacts of tube inner wall.
Wherein, 1 nut; 2 rod collar bodies; 3 rotary bodies; 4 oil pipes.
The specific embodiment
As shown in Figure 1, a kind of multi-cambered surface rotary body rod collar, comprise the rod collar body 2 being arranged in oil pipe 4, rod collar body 2 upper end peripheries are provided with nut 1, rod collar body 2 periphery nut bottoms are provided with rotary body 3, and rotary body 3 internal diameters match with rod collar body 2 external diameters, between rotary body 3 and oil pipe 4, leave gap, the outer work plane of rotary body 4 has 3 sections of arc surfaces, and the radius of curvature of every section of arc surface and tube inner wall radius of curvature match.
The utility model is not limited to above-described embodiment; every on the disclosed technical scheme of the utility model basis; those skilled in the art are according to disclosed technology contents, in the scope that do not need creatively the to work replacement that just can make technical characterictic wherein and distortion are all protected at the utility model.The for example outer work plane of rotary body 4 is at least 3 sections of above arc surfaces, is preferably 3-6 section arc surface, and it can guarantee between rotary body and oil pipe, have enough contact surfaces, simultaneously convenient processing and manufacture.
Claims (2)
1. a multi-cambered surface rotary body rod collar, comprise the rod collar body being arranged in oil pipe, rod collar body upper end periphery is provided with nut, rod collar body periphery nut bottom is provided with rotary body, rotary body internal diameter matches with this body diameter of rod collar, between rotary body and oil pipe, leave gap, it is characterized in that the outer work plane of described rotary body is at least 3 sections of above arc surfaces, the radius of curvature of described every section of arc surface and tube inner wall radius of curvature match.
2. multi-cambered surface rotary body rod collar according to claim 1, is characterized in that the outer work plane of described rotary body is 3-6 section arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724608.XU CN203570216U (en) | 2013-11-18 | 2013-11-18 | Multi-cambered surface rotator sucker rod coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724608.XU CN203570216U (en) | 2013-11-18 | 2013-11-18 | Multi-cambered surface rotator sucker rod coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203570216U true CN203570216U (en) | 2014-04-30 |
Family
ID=50537950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320724608.XU Expired - Lifetime CN203570216U (en) | 2013-11-18 | 2013-11-18 | Multi-cambered surface rotator sucker rod coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203570216U (en) |
-
2013
- 2013-11-18 CN CN201320724608.XU patent/CN203570216U/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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |