CN2295846Y - Self-tighting drop-off preventer for sucker rod - Google Patents
Self-tighting drop-off preventer for sucker rod Download PDFInfo
- Publication number
- CN2295846Y CN2295846Y CN 97216774 CN97216774U CN2295846Y CN 2295846 Y CN2295846 Y CN 2295846Y CN 97216774 CN97216774 CN 97216774 CN 97216774 U CN97216774 U CN 97216774U CN 2295846 Y CN2295846 Y CN 2295846Y
- Authority
- CN
- China
- Prior art keywords
- self
- oil pumping
- pumping rod
- dropping device
- ratchet
- 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 - Fee Related
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Abstract
The utility model relates to a self-tightening type anti-dropping device for an oil pumping rod. The self-tightening type anti-dropping device for an oil pumping rod is a special tool for enhancing the life of an oil pumping rod and preventing the oil pumping rod from dropping. The self-tightening type anti-dropping device for an oil pumping rod is characterized in that the self-tightening type anti-dropping device for an oil pumping rod aims at that instantaneous positive torque and instantaneous reverse torque exist in the process of the up-and-down motion of the oil pumping rod, the instantaneous reverse torque (i.e. buckle disassembly torque) is eliminated by the function of a conical roller bearing and a ratchet one-way clutch mechanism, and the instantaneous positive torque (i.e. upper buckle torque) is transferred and accumulated. The original loosening thread of the oil pumping rod obtains self tightening. The buckling drop phenomenon of the oil pumping rod is fundamentally eliminated, and the service life of the oil pumping rod and the self-tightening type anti-dropping device for an oil pumping rod is extended.
Description
The utility model belongs to oil sucker rod pumping apparatus for work, can improve sucker rod application life, prevents a kind of special tool of pumping rod disengaging.
The kind of present domestic sucker rod anti-dropping device is a lot.Typically there is a kind of bogie that is fixed on the pumping unit horsehead directly to drive one group of pawl wheel mechanism that is enclosed within on the polished rod, drives rod string and do dextrorotation (clockwise) motion, thereby prevent the rod string dropout effectively.The numerous rope of this type anti-dropping device structure, result of use is bad, causes rod broken easily, and fragile.But another upside down fastened sucker rod anti-dropping device mainly is made up of two parts up and down of relative motion, in the closed recess of the middle bullet lateral surface of bottom a pin is arranged, have a retaining nail radially to screw in the groove on the lateral surface on the top closure circle corresponding with groove, two parts relatively rotate the shelves nail and realize back-off at transfer torque up and down when offseting with pin up and down.This type anti-dropping device has only only overcome the shortcoming that existing sucker rod anti-dropping device can not be realized back-off.Another kind of beam hanger anti-dropping device anti-drop device is made up of top connection, mandrel, overcoat, bearing and one-way locking mechanism, and purpose is in order to tighten the sucker rod button, to prevent dropout, and its one-way locking mechanism spring lost efficacy easily, and caused anti-dropping device ineffective.The same existence of this anti-dropping device can not back-off shortcoming, and in reality fracture accident often appears.
The purpose of this utility model is: the above-mentioned defective that exists at existing sucker rod anti-dropping device, and design a kind of eliminates the shackle moment of torsion and do not eliminate the self-tightening type long-life sucker rod anti-dropping device of tightening torque.
Fig. 1 is the utility model structural representation
Fig. 2 is the A-A sectional view of Fig. 1
Describe in detail below in conjunction with accompanying drawing: shell 16 tops connect top connection 1 and are fixed by locking shear pin 14; Shell 16 The interior mandrel 13 that inserts along axis from the bottom is provided with steel ball 2 in top connection 1 lower surface and mandrel 13 upper surface axis, Be set with successively the ratchet one-way that is consisted of by back-up ring 3, ratchet axle 4, ratchet 5 and ratchet 6 along this interface downwards at mandrel 13 Clutch, pressure-bearing fixed head 7, upper bearing plate 8, taper roll bearing 9, stop washer 10, bearing fixed seat 11, lower Bearing plate 12; Pressure-bearing fixed head 7 radially is provided with hold-down screw 15; 16 of ratchet frame 6 opposite shell are provided with hold-down screw 17; Mandrel 13 lower ends are provided with absorbing pipe nipple 18. Mandrel 13 tops and ratchet 5 corresponding position cylindricals are provided with teeth groove. Mandrel 13 The bottom is stretched out shell 16 and is connected with absorbing pipe nipple 18. Center, mandrel 13 top and corresponding top connection 1 bottom each One recessed circle is arranged, a steel ball wherein is set.
The purpose of this utility model is achieved in that self-tightening type sucker rod anti-dropping device in the course of the work, and sucker rod is owing to the effect of the instantaneous positive and negative moment of torsion that produced by the down-hole factor affecting.When being subjected to instantaneous reaction torque (shackle moment of torsion) to do the time spent, the ratchet one-way clutch of self-tightening type sucker rod anti-dropping device separates, and by the rotation of conical bearing instantaneous reaction torque is eliminated.When being subjected to instantaneous positive moment of torsion (tightening torque) to do the time spent, one-way clutch mechanism closes, and positive moment of torsion is delivered to the sucker rod buckle, and gathers, and then make whole beam hanger string screw thread obtain self-tightening, reaches the purpose that prevents pumping rod disengaging.This utility model is eliminated pumping rod disengaging hidden danger for guaranteeing, gathers torque wrench moment to reach the purpose that links closely, and two ratchet ratchet mechanisms have guaranteed that one-way clutch mechanism normally moves.This type anti-dropping device has adopted big taper roll bearing, and supporting capacity and working life increase greatly.Also have an advantage be exactly at anti-dropping device in the stressed complexity of underground work, designed the absorbing square that matches in particular for it and saved.When anti-dropping device is subjected to torsional interaction, moment of torsion is delivered on the ratchet 5 by mandrel 13, if tightening torque, the teeth groove engagement on ratchet 5 and the mandrel 13, transfer torque to the ratchet frame and pass in shell 16 and the top connection 1, give torque wrench moment of top sucker rod by hold-down screw 17; If the shackle moment of torsion, then ratchet 5 separates with teeth groove on the mandrel 13, and moment of torsion does not pass to mandrel, and just the rotation by taper roll bearing eliminates moment of torsion.
Distinguishing feature of the present utility model is: the instantaneous positive moment of torsion and the instantaneous reaction torque that exist in the process of moving up and down at sucker rod, effect by taper roll bearing, utilize the ratchet one-way clutch, instantaneous reaction torque (being the shackle moment of torsion) is eliminated, makes instantaneous positive moment of torsion (being torque wrench moment) transmit, gather.Make former loosening sucker rod screw thread obtain self-tightening.Fundamentally eliminate the pumping rod disengaging phenomenon, prolonged the application life of sucker rod and anti-dropping device.
Claims (3)
1. self-tightening type sucker rod anti-dropping device, be made up of top connection (1), shell (16), taper roll bearing (9), pressure-bearing fixed head (7) and bearing fixed seat (11), bearing plate (8) and (12), screw (15), (17) and (14), stop washer (10) etc., it is characterized in that: shell (16) top connects top connection (1) and fixing by locking shear pin (14); Insert mandrel (13) from the bottom along axis in the shell (16), at mandrel (13) the ratchet one-way clutch that constitutes by back-up ring (3), ratchet axle (4), ratchet (5) and ratchet (6) of suit successively downwards, pressure-bearing fixed head (7), go up bearing plate (8), taper roll bearing (9), stop washer (10), bearing fixed seat (11), bearing plate (12) down along this interface; Pressure-bearing fixed head (7) radially is provided with hold-down screw (15); Be provided with hold-down screw (17) between ratchet frame (6) opposite shell (16); Mandrel (13) lower end is provided with absorbing pipe nipple (18).Mandrel (13) top and ratchet (5) corresponding position cylindrical are provided with teeth groove.
2. self-tightening type sucker rod anti-dropping device according to claim 1 is characterized in that: be provided with steel ball (2) on top connection (1) lower surface and mandrel (13) upper surface axis.
3. self-tightening type sucker rod anti-dropping device according to claim 1 is characterized in that: mandrel (13) bottom is stretched out shell (16) and is connected with absorbing pipe nipple (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97216774 CN2295846Y (en) | 1997-06-11 | 1997-06-11 | Self-tighting drop-off preventer for sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97216774 CN2295846Y (en) | 1997-06-11 | 1997-06-11 | Self-tighting drop-off preventer for sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2295846Y true CN2295846Y (en) | 1998-10-28 |
Family
ID=33933590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97216774 Expired - Fee Related CN2295846Y (en) | 1997-06-11 | 1997-06-11 | Self-tighting drop-off preventer for sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2295846Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364935A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN112324363A (en) * | 2020-10-30 | 2021-02-05 | 中石化石油工程技术服务有限公司 | Reverse-locking prevention device for sucker rod |
-
1997
- 1997-06-11 CN CN 97216774 patent/CN2295846Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364935A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN111364935B (en) * | 2018-12-25 | 2022-06-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN112324363A (en) * | 2020-10-30 | 2021-02-05 | 中石化石油工程技术服务有限公司 | Reverse-locking prevention device for sucker rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |