CN203925318U - Sucker rod rotary damping anti-drop device - Google Patents
Sucker rod rotary damping anti-drop device Download PDFInfo
- Publication number
- CN203925318U CN203925318U CN201420321685.5U CN201420321685U CN203925318U CN 203925318 U CN203925318 U CN 203925318U CN 201420321685 U CN201420321685 U CN 201420321685U CN 203925318 U CN203925318 U CN 203925318U
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- ball base
- hole
- spring
- lower ball
- sucker rod
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Abstract
The utility model discloses a kind of sucker rod rotary damping anti-drop device in pumping rod connecting device field, comprise cylindrical body, body center is provided with the through hole that runs through up and down body, in through hole, be provided with lower ball base and upper ball base, between upper ball base and lower ball base, be equipped with ball screw, the screw rod end of ball screw is passed down through lower ball base and stretches out from through hole bottom; Body upper end open position is connected with top connection through internal thread, upper ball base and lower ball base are slidably arranged in through hole, in enclosed cavity between upper ball base upper end and top connection, be provided with precompressed upper spring, through hole end opening is provided with inwardly protruded interior step, between lower ball base and interior step inner face, is provided with precompressed lower spring.Free to rotate and swing between ball screw and body in this device, upper spring and lower spring have bumper and absorbing shock function, can eliminate rod string due to vibrations and crooked torsion that fluctuating load produces, prevent eccentric wear, dropout and the fracture of rod string.
Description
Technical field
The utility model relates to a kind of oil field sucker rod pumping equipment, particularly a kind of pumping rod connecting device.
Background technology
In prior art, there is a kind of ball-and-socket hinge style thread off prevention connecting device for pumping rod, its publication number is: CN203570218U, within open day, be: 2014-04-30, this device comprises body, body center is provided with the shoulder hole that runs through up and down body, and aperture, shoulder hole top is greater than aperture, bottom, and shoulder hole inner bottom part is provided with lower ball base; In lower ball base, be equipped with ball screw, the screw rod end of ball screw is passed down through lower ball base and stretches out from shoulder hole bottom, and be connected with transit joint, in shoulder hole, being provided with the upper ball base matching with ball screw bulb end, upper ball base is threaded in shoulder hole.During work, sucker rod twists formula thread off prevention connecting device by ball and connects rear G.I.H, by upper lower ball base, bears axial load, both free to rotate between upper lower body, can freely swing again, can fully eliminate the back-off moment producing while pumping because of sucker rod.Its weak point is: rod string pumps for a long time, owing to being subject to liquid buoyancy in well, frictional force, the impact of the factors such as liquid hammer power, rod string is stressed very complicated, long-term in larger fluctuating load, make the wearing and tearing of the continuous generation of rod string and tube inner wall, vibrations and helical buckling, the crooked torsion forming after helical buckling discharges nowhere in being rigidly connected, add long-term wearing and tearing and vibrations, thereby can cause the eccentric wear of rod string, the accidents such as dropout and fracture, need to carry out workover treatment for this reason, both affected crude oil production, consume again a large amount of man power and materials.
Utility model content
The purpose of this utility model is to provide a kind of sucker rod rotary damping anti-drop device, make it have rotate freely, the function of swing and bumper and absorbing shock, can effectively alleviate the suffered fluctuating load of rod string, the vibrations and the crooked torsion that to eliminate rod string, produce, reduce the generation of the accidents such as eccentric wear, dropout and fracture of rod string.
The purpose of this utility model is achieved in that a kind of sucker rod rotary damping anti-drop device, comprise cylindrical body, body center is provided with the through hole that runs through up and down body, in through hole, be provided with lower ball base and upper ball base, between upper ball base and lower ball base, be equipped with ball screw, the screw rod end of described ball screw is passed down through lower ball base and stretches out from through hole bottom; Body upper end open position is connected with top connection through internal thread, upper ball base and lower ball base are slidably arranged in through hole, in enclosed cavity between upper ball base upper end and top connection, be provided with precompressed upper spring, through hole end opening is provided with inwardly protruded interior step, between lower ball base and interior step inner face, is provided with precompressed lower spring.
During this device work, by top connection, with ball screw, upper and lower rod string is connected, after rod string G.I.H, by upper ball base and lower ball base, bear axial load, free to rotate and swing between ball screw and body, upper spring and lower spring have bumper and absorbing shock function, can fully eliminate rod string due to vibrations and crooked torsion that fluctuating load produces, have effectively prevented the generation of the accidents such as eccentric wear, dropout and fracture of rod string.Compared with prior art, intensity of the present utility model is high, safe and reliable, the complicated applied force state that can adapt to underground sucker rod post, vibrations and crooked torsion that sucker rod pumps and produces have effectively been eliminated, prevent rod broken and the well accident of threading off, increase the safety in production of oil well, extended the production cycle of oil well, improved field produces benefit.It can safety applications at oil field well.
As further improvement of the utility model, described through hole is the shoulder hole that comprises large footpath section and path section, between the large footpath section of shoulder hole and path section, leave limited step, upper ball base and lower ball base are equipped with in the section of the large footpath of described shoulder hole, and lower spring is partly positioned at the path section of shoulder hole; Described top connection lower end is provided with axial hole, and described upper spring is partly positioned at axial hole, and the internal diameter of axial hole is less than the large footpath section internal diameter of shoulder hole.The lower surface of limited step and top connection forms respectively spacing and top spacing of bottom, make rod string stressed when larger, lower ball base and upper ball base can directly be conflicted in corresponding spacing position, can bear larger load on the one hand, can avoid spring excess compression on the other hand, guarantee the dependability of device.
For ease of ball screw, swing, the hole that the screw rod end of the appearance ball screw arranging on described lower ball base passes is up-small and down-big bellmouth.When ball screw swings, can not produce distortion power to lower ball base, further guarantee the dependability of device.
In the utility model, described upper spring, lower spring can be helical spring, disk spring or rubber spring.
As further improvement of the utility model, described upper spring place cavity is enclosed cavity.The cavity at upper spring place is enclosed cavity, can guarantee that upper spring present position no liquid enters, and upper ball base motion is smooth and easy; Although the passage that chamber, lower ball base place has ball screw to stretch out, due to the bottommost of position at through hole, air can not freely be discharged, and also can guarantee that upper spring top and lower ball base can not be immersed in liquid, so its corrosion is little, can long-time reliably working.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Wherein, 1 top connection, 2 bodies, 201 interior steps, 202 limited steps, 3 upper springs, 4 upper ball bases, 5 ball screws, 6 lower ball bases, 7 lower springs, 8 bellmouths, 9 axial holes.
The specific embodiment
As shown in the figure, for a kind of sucker rod rotary damping anti-drop device, its body 2 is cylindrical, body 2 centers are provided with the through hole that runs through up and down body 2, in through hole, be provided with lower ball base 6 and upper ball base 4, between upper ball base 4 and lower ball base 6, be equipped with ball screw 5, the screw rod end of ball screw 5 is passed down through lower ball base 6 and stretches out from through hole bottom; Body 2 upper end open positions are connected with top connection 1 through internal thread, and upper ball base 4 and lower ball base 6 are slidably arranged in through hole, are provided with precompressed upper spring 3 in the enclosed cavity between upper ball base 4 upper ends and top connection 1, and upper spring 3 place cavitys can be enclosed cavities; Through hole end opening is provided with inwardly protruded interior step 201, between lower ball base 6 and described interior step 201 inner faces, is provided with precompressed lower spring 7.Through hole is the shoulder hole that comprises large footpath section and path section, between the large footpath section of shoulder hole and path section, leaves limited step 202, and upper ball base 4 and lower ball base 6 are equipped with in the section of the large footpath of described shoulder hole, and lower spring 7 parts are positioned at the path section of shoulder hole; Top connection 1 lower end is provided with axial hole 9, and upper spring 3 parts are positioned at axial hole 9, and the internal diameter of axial hole 9 is less than the large footpath section internal diameter of shoulder hole.Between the lower surface of limited step 202 and top connection 1, form upper and lower two spacing, avoid upper spring 3 and lower spring 7 excess compression; The hole that the screw rod end of the appearance ball screw 5 arranging on lower ball base 6 passes is up-small and down-big bellmouth 8.In the present embodiment, upper spring 3, lower spring 7 are helical spring.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection domain of the present utility model.For example in the utility model, upper spring, lower spring can also be disk spring or rubber spring.
Claims (5)
1. a sucker rod rotary damping anti-drop device, comprise cylindrical body, body center is provided with the through hole that runs through up and down body, in through hole, be provided with lower ball base and upper ball base, between upper ball base and lower ball base, be equipped with ball screw, the screw rod end of described ball screw is passed down through lower ball base and stretches out from through hole bottom; It is characterized in that, body upper end open position is connected with top connection through internal thread, upper ball base and lower ball base are slidably arranged in through hole, in enclosed cavity between upper ball base upper end and top connection, be provided with precompressed upper spring, through hole end opening is provided with inwardly protruded interior step, between lower ball base and described interior step inner face, is provided with precompressed lower spring.
2. a kind of sucker rod rotary damping anti-drop device according to claim 1, it is characterized in that: described through hole is the shoulder hole that comprises large footpath section and path section, between the large footpath section of shoulder hole and path section, leave limited step, upper ball base and lower ball base are equipped with in the section of the large footpath of described shoulder hole, and lower spring is partly positioned at the path section of shoulder hole; Described top connection lower end is provided with axial hole, and described upper spring is partly positioned at axial hole, and the internal diameter of described axial hole is less than the large footpath section internal diameter of shoulder hole.
3. a kind of sucker rod rotary damping anti-drop device according to claim 1, is characterized in that: the hole that the screw rod end of the appearance ball screw arranging on lower ball base passes is up-small and down-big bellmouth.
4. according to a kind of sucker rod rotary damping anti-drop device described in claim 1-3 any one, it is characterized in that: described upper spring, lower spring are helical spring, disk spring or rubber spring.
5. according to a kind of sucker rod rotary damping anti-drop device described in claim 1-3 any one, it is characterized in that: described upper spring place cavity is enclosed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420321685.5U CN203925318U (en) | 2014-06-17 | 2014-06-17 | Sucker rod rotary damping anti-drop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420321685.5U CN203925318U (en) | 2014-06-17 | 2014-06-17 | Sucker rod rotary damping anti-drop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203925318U true CN203925318U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420321685.5U Active CN203925318U (en) | 2014-06-17 | 2014-06-17 | Sucker rod rotary damping anti-drop device |
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| Country | Link |
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| CN (1) | CN203925318U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033110A (en) * | 2014-06-17 | 2014-09-10 | 济源市石油机械有限公司 | Sucker rod rotating shock-absorbing anti-releasing device |
| CN110359857A (en) * | 2018-01-29 | 2019-10-22 | 西南石油大学 | It is a kind of for mitigating the spring damper of underground sucker rod extensional vibration |
-
2014
- 2014-06-17 CN CN201420321685.5U patent/CN203925318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033110A (en) * | 2014-06-17 | 2014-09-10 | 济源市石油机械有限公司 | Sucker rod rotating shock-absorbing anti-releasing device |
| CN110359857A (en) * | 2018-01-29 | 2019-10-22 | 西南石油大学 | It is a kind of for mitigating the spring damper of underground sucker rod extensional vibration |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |