CN2413014Y - Special weighting rod - Google Patents
Special weighting rod Download PDFInfo
- Publication number
- CN2413014Y CN2413014Y CN 00211179 CN00211179U CN2413014Y CN 2413014 Y CN2413014 Y CN 2413014Y CN 00211179 CN00211179 CN 00211179 CN 00211179 U CN00211179 U CN 00211179U CN 2413014 Y CN2413014 Y CN 2413014Y
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- CN
- China
- Prior art keywords
- rod
- hollow
- utility
- model
- lead
- 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 an underground tool used on an oil field and an oil well, particularly a weighting rod. The utility model is composed of an upper joint (1), a hollow rod (2), a guard sheet (3), a lead rod (4) and a lower joint (5). Because the utility model adopts the structure that the lead rod is joined in the hollow rod, which eliminates the bending stress of the down stroke of a sucker rod string, extends the life of the sucker rod string, reduces or avoids the occurrence of underground accidents of breaking and casting, and increases the rigidity and strength of the sucker rod string. Compared with the common weighting rod with a homogeneous specification, the weighting rod of per meter weighs 2-4KG. The neutral point of the sucker rod string is moved down, which leads the fixed valve of a pump to be closed rapidly and a traveling valve to be opened rapidly and increases the efficiency of the pump. The utility model has the advantages of simple structure and reasonable design, and is quite suitable for generalization and application on the spot.
Description
The utility model relates to the downhole tool that uses on a kind of oilfield, particularly a kind of weighted lever.
At present in the sucker rod oil pumping process, when down stroke, because the effect of resistance can cause the buckling of rod string bottom, makes sucker rod bear subsidiary stress, after a period of time, be easy to disconnected taking off, even some well has used weighted lever, because in light weight, can not address this problem well, the frequency that the down-hole break-off accident takes place is higher.
The purpose of this utility model is to provide a kind of extraordinary weighted lever, and it can reduce the neutral point of rod string in oil pumping process, eliminates the flexural stress of rod string, prolongs the rod string life-span.
The purpose of this utility model is to realize like this, it is made up of top connection (1), hollow stem (2), catch (3), lead rod (4), lower contact (5), be placed with cylindrical lead rod in hollow stem (2), it up and down is equipped with the upper/lower terminal that catch (3), top connection (1), lower contact (5) are welded on hollow (2) respectively in two ends.
When work, a plurality of weighted levers are connected on the sucker rod by joint, compare with the weighted lever that specification of the same race is common, every meter heavy 2-4 kilogram, the neutral point of rod string moves down, and the standing valve of pump is closed rapidly, travelling valve is opened rapidly, improves pump efficiency, has overcome the descending resistance of plunger.
The utility model is eliminated the flexural stress of rod string in down stroke owing to adopted adding lead rod in the hollow stem, prolongs the life-span of rod string, reduces or avoid the generation of down-hole break-off accident, improves the rigidity and the intensity of rod string.It is simple in structure, and is reasonable in design, is well suited for field popularization application.
Accompanying drawing 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation that has pipe hanger.
Below in conjunction with accompanying drawing the utility model is further specified.
As shown in Figure 1, form by top connection 1, hollow stem 2, catch 3, lead rod 4, lower contact 5, it is that a body of rod diameter is the extraordinary weighted lever of Φ 36mm, put into the special lead rod 4 of Φ 24mm in the hollow rod 1 of Φ 36mm, lead rod 4 is made one section of 500mm according to the hollow rod that adopts and the specification of oil pipe, several sections lead rods 4 are put into hollow rod, be Φ 25mm, thickly block for the catch 2 of 5mm with diameter, and catch 2 is welded in the hollow rod 1, adopt friction welding that special Φ 22mm rod connector is welded in two ends.This weighted lever weight reaches 9.7kg/m.
Top connection 1 shown in Figure 2 has " necking down " that can block pipe hanger.Be contained in the well head place, be beneficial to lifting operation.
Claims (3)
1, extraordinary weighted lever, form by top connection (1), hollow stem (2), catch (3), lead rod (4), lower contact (5), it is characterized in that: be placed with cylindrical lead rod (4) in hollow stem (2), it up and down is equipped with the upper/lower terminal that catch (3), top connection (1), lower contact (5) are welded on hollow (2) respectively in two ends.
2, extraordinary weighted lever according to claim 1, it is characterized in that: the special lead rod (4) of putting into Φ 24mm in the hollow rod of Φ 36mm (1), lead rod (4) is made one section of 500mm according to the hollow rod that adopts and the specification of oil pipe, several sections lead rods (4) are put into hollow rod, be Φ 25mm, thickly block for the catch of 5mm (2) with diameter, and catch (2) is welded in the hollow rod (1), adopt friction welding that special Φ 22mm sucker rod top connection (1), lower contact (5) are welded in hollow rod (1) two ends.
3, extraordinary weighted lever according to claim 1 is characterized in that: top connection (1) has " necking down " that can block pipe hanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00211179 CN2413014Y (en) | 2000-03-15 | 2000-03-15 | Special weighting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00211179 CN2413014Y (en) | 2000-03-15 | 2000-03-15 | Special weighting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2413014Y true CN2413014Y (en) | 2001-01-03 |
Family
ID=33577920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00211179 Expired - Fee Related CN2413014Y (en) | 2000-03-15 | 2000-03-15 | Special weighting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2413014Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282667A (en) * | 2019-07-22 | 2021-01-29 | 中国石油天然气股份有限公司 | Lead-zinc alloy sucker rod auxiliary weighting short joint |
-
2000
- 2000-03-15 CN CN 00211179 patent/CN2413014Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282667A (en) * | 2019-07-22 | 2021-01-29 | 中国石油天然气股份有限公司 | Lead-zinc alloy sucker rod auxiliary weighting short joint |
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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 |