CN2756814Y - Anti-unstabilizing compensating device for sucker rod - Google Patents
Anti-unstabilizing compensating device for sucker rod Download PDFInfo
- Publication number
- CN2756814Y CN2756814Y CN 200420121746 CN200420121746U CN2756814Y CN 2756814 Y CN2756814 Y CN 2756814Y CN 200420121746 CN200420121746 CN 200420121746 CN 200420121746 U CN200420121746 U CN 200420121746U CN 2756814 Y CN2756814 Y CN 2756814Y
- Authority
- CN
- China
- Prior art keywords
- rod
- sucker rod
- diameter
- external cylinder
- centre
- 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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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model relates to an instability-resistant compensator for a sucker rod, which is composed of an upper joint, a centre rod, an external cylinder and a lower joint, wherein the lower part of the upper joint is connected with the upper part of the centre rod, the external cylinder is sheathed outside of the centre rod, the diameter of the upper part of the centre is small, the diameter of the lower part is large, the varying position of the large diameter and the small diameter is provided with a circular bead, the diameter of the upper part of the external cylinder is small, the diameter of the lower part is large, the varying position of the large diameter and the small diameter is provided with a circular bead, an internal hole at the upper part of the external cylinder is matched with the upper part of the centre rod, an internal hole at the lower part of the external cylinder is matched with the lower part of the centre rod, relative sliding can be generated between the external cylinder and the centre rod, and the lower part of the external cylinder is connected with the lower joint. The instability-resistant compensator for a sucker rod is connected with an instable position of a rod string, before the sucker rod is instable and bends, the relative sliding is generated between the external cylinder and the centre rod, force which causes the sucker rod to be instable and bended is released, the stability of the rod string is improved, the rod string can not be instable, no contact pressure can be generated between the sucker rod and an oil conduit, and the eccentric wear between the sucker rod and the oil conduit can be prevented.
Description
One, technical field
The utility model relates to the oil production equipment of petroleum industry, and particularly a kind of sucker rod is prevented the unstability expansion loop, belongs to engineering goods.
Two, background technology
In sucker-rod pumping system, sucker rod is when down stroke, and the rod string bottom is owing to be subjected to the various drag effects that make progress, the sucker rod bottom is with the unstability bending, make the very big contact pressure of generation between sucker rod and the oil pipe, serious sucker rod and the eccentric wear between the oil pipe occur, behind the generation eccentric wear oil pipe and sucker rod can not be used, cause the oil well operation, oil well repair free period is short, increases operating cost, increases rod tube consumption, the oil well off-time is many, reduces crude output.The unstability bending of sucker rod bottom also can produce loss of plunger stroke and loss in efficiency.For avoiding oil pipe, sucker rod partial wear damage problem occurring, often adopt oil pipe, sucker rod abrasionproof device on the oil recovery technique, but owing to do not solve the problem of the descending unstability bending of sucker rod, serious wearing and tearing still appear in sucker rod and oil pipe.
Three, summary of the invention
The purpose of this utility model is the anti-unstability expansion loop of a kind of sucker rod of design, when avoiding sucker rod descending in oil pipe the unstability bending cause sucker rod and oil pipe eccentric wear.
The purpose of this utility model is achieved in that by top connection, center-pole, urceolus, lower contact is formed, the top connection bottom connects with center-pole top, urceolus is sleeved on outside the center-pole, urceolus is under the top connection, the center-pole upper diameter is little, lower diameter is big, size diameter variation place has a shoulder, the urceolus upper diameter is little, lower diameter is big, size diameter variation place has a shoulder, and urceolus top endoporus matches with center-pole top, and urceolus bottom endoporus cooperates with the center-pole bottom, can slide relatively between urceolus and the center-pole, but can not separate under top connection and the shoulder effect of two places, sliding distance is spacing by shoulder on the urceolus and the shoulder on the center-pole, and the urceolus bottom connects lower contact.
The beneficial effects of the utility model are: the anti-unstability expansion loop of sucker rod is connected in the unstability position of rod string, before the bending of sucker rod unstability, relative slip between urceolus and the center-pole, make the power that causes the bending of sucker rod unstability obtain discharging, the stability of rod string improves, rod string can unstability, can not produce contact pressure between sucker rod and the oil pipe, thereby can prevent the eccentric wear between sucker rod and the oil pipe, can effectively play the effect that prevents that sucker rod and oil pipe eccentric wear from damaging, prolong the application life and the oil well repair free period of sucker rod and oil pipe, improve pump efficiency and machine and adopt efficient, increase oil well output.
Four, description of drawings
Accompanying drawing is the utility model embodiment assembling drawing.
Five, the specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described.
Among the figure: the 1st, top connection, the 2nd, center-pole, the 3rd, urceolus, the 4th, lower contact.Be that the utility model is by top connection 1, center-pole 2, urceolus 3, lower contact 4 is formed, top connection 1 bottom connects with center-pole 2 tops, urceolus 3 is sleeved on outside the center-pole 2, urceolus 3 is under the top connection 1, center-pole 2 upper diameter are little, lower diameter is big, size diameter variation place has a shoulder B, and urceolus 3 upper diameter are little, and lower diameter is big, size diameter variation place has a shoulder A, urceolus 3 top endoporus match with center-pole 2 tops, and urceolus 3 bottom endoporus cooperate with center-pole 2 bottoms, can slide relatively between urceolus 3 and the center-pole 2, sliding distance is spacing by shoulder A on the urceolus 3 and the shoulder B on the center-pole 2, and urceolus 3 bottoms connect lower contact 4.
Claims (1)
1, the anti-unstability expansion loop of a kind of sucker rod, form by top connection (1), center-pole (2), urceolus (3), lower contact (4), it is characterized in that: top connection (1) bottom connects with center-pole (2) top, urceolus (3) is sleeved on outside the center-pole (2), urceolus (3) is under the top connection (1), and urceolus (3) bottom connects lower contact (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420121746 CN2756814Y (en) | 2004-12-08 | 2004-12-08 | Anti-unstabilizing compensating device for sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420121746 CN2756814Y (en) | 2004-12-08 | 2004-12-08 | Anti-unstabilizing compensating device for sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2756814Y true CN2756814Y (en) | 2006-02-08 |
Family
ID=35965200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420121746 Expired - Fee Related CN2756814Y (en) | 2004-12-08 | 2004-12-08 | Anti-unstabilizing compensating device for sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2756814Y (en) |
-
2004
- 2004-12-08 CN CN 200420121746 patent/CN2756814Y/en not_active Expired - Fee Related
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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 |