CN201696271U - Lengthened stroke oil well pump - Google Patents
Lengthened stroke oil well pump Download PDFInfo
- Publication number
- CN201696271U CN201696271U CN2010202348721U CN201020234872U CN201696271U CN 201696271 U CN201696271 U CN 201696271U CN 2010202348721 U CN2010202348721 U CN 2010202348721U CN 201020234872 U CN201020234872 U CN 201020234872U CN 201696271 U CN201696271 U CN 201696271U
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- China
- Prior art keywords
- oil well
- inner core
- assembly
- well pump
- stroke
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- Expired - Fee Related
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Abstract
The utility model discloses a lengthened stroke oil well pump used in petroleum industry and applied to oil test engineering and the normal production of oil wells. The lengthened stroke oil well pump comprises an outer barrel assembly, an inner barrel assembly and a plunger assembly, wherein the plunger assembly is arranged in the inner barrel assembly; the inner barrel assembly is arranged in the outer barrel assembly; the inner barrel assembly is provided with a lengthened inner barrel; and a plunger of the plunger assembly performs reciprocating motion in the lengthened inner barrel. Compared with a conventional oil well pump, the lengthened stroke oil well pump has the advantages as follows: the stroke length is greatly lengthened, so that the relative stroke loss of the oil well pump is reduced, and the fullness coefficient and the discharge coefficient of the pump are improved; by adopting long stroke, frequency of stroke can be reduced, so that the mechanical wear of the oil well pump and wear abrasion between a sucker rod and an oil pipe can be reduced, and the service lives of the oil well pump and the sucker rod can be greatly increased. The stroke length is adjusted according to oil well conditions, long stroke or short stroke can also be selected for swabbing production, and the lengthened stroke oil well pump has high applicability.
Description
Technical field
The utility model relates to the down-hole pumping unit of petroleum production engineering, and particularly a kind of long stroke oil well pump that adds uses in the ordinary production of formation testing engineering and oil well.
Background technique
Along with deepening continuously of oil field development, in, LOW PERMEABILITY RESERVOIR becomes the battle position that each elephant is produced day by day.The type oil reservoir buries deeply, poor permeability, oil well liquid level are low, and the main mining type of employing is that little pump is taken out deeply, has the problem that loss of plunger stroke is big, wastage is big and pump efficiency is low in recovery process.Owing to influenced by All aspects of such as design, difficulty of processing and raw material, the oil well pump stroke of on-the-spot usefulness is shorter, is generally 6m, and the stroke utilization ratio is not high.Secondly, along with the increase of lift height, the oil pumping pump leakage significantly increases, and makes that the utilization ratio of oil well pump is relatively poor.
Summary of the invention
The purpose of this utility model provides a kind of long stroke oil well pump that adds, and cooperates long pump barrel by long-plunger, reaches the prolongation length of stroke, improves the purpose of stroke utilization ratio.
For reaching above-mentioned purpose, can adopt the present technique solution: a kind of long stroke oil well pump that adds comprises outer barrel assembly, inner core assembly and plunger piston assembly, plunger piston assembly places in the inner core assembly, the inner core assembly places in the outer barrel assembly, the inner core assembly is provided with the lengthening inner core, the to-and-fro motion in the lengthening inner core of the plunger of plunger piston assembly.
Compared with the prior art the utility model has following useful effect:
1, cooperate long pump barrel with long-plunger, the length of plunger is longer than the length of pump barrel in the lengthening inner core again, realizes that ultra-long-stroke recovers the oil;
2, the twin-stage sealing of rubber and copper sheathing combination is adopted at the top of inner core assembly, and sealability is reliable, and wastage reduces;
3, grappling locking technology has been adopted in inner core assembly bottom, reliable in structure, and coupling mechanism force is big, makes inner core assembly of the present utility model and outer barrel assembly strong bonded, avoids the inner core assembly to go here and there the problems such as seal failure that caused of moving up and down in outer barrel assembly.
This oil well pump is compared with conventional oil well pump, because length of stroke extends greatly, the relative loss of plunger stroke of oil well pump reduces, and has improved the filling index and the Coefficient of discharge of pump, and pump efficiency significantly improves.Secondly, adopt long stroke, just can reduce jig frequency, thereby can reduce the mechanical wear of oil well pump and the wearing and tearing between sucker rod and oil pipe, the working life that can improve oil well pump and sucker rod greatly.Moreover the utility model can also be regulated length of stroke according to the oil well condition, selects to use long stroke or short stroke swabbing production, has higher adaptability.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the schematic representation of plunger piston assembly of the present utility model when upper dead center.
Fig. 3 is the schematic representation of plunger piston assembly of the present utility model when lower dead centre.
Embodiment
Below in conjunction with accompanying drawing the utility model is described, as shown in Figure 1, a kind of long stroke oil well pump that adds comprises outer barrel assembly, inner core assembly and plunger piston assembly, plunger piston assembly places in the inner core assembly, the inner core assembly places in the outer barrel assembly, the inner core assembly is provided with the lengthening inner core, the to-and-fro motion in the lengthening inner core of inner core assembly of the plunger 12 of plunger piston assembly.Outer barrel assembly comprises crossover sub 9 on oil connection 3, stuffing box gland 5, the urceolus, goes up crossover sub 15 under urceolus 11, the urceolus, following urceolus 18 and following oil connection 20, and above-mentioned each parts connect from top to bottom successively.The inner core assembly comprises seal 4, lengthening inner core and feed liquor valve group 19, and seal 4, lengthening inner core are connected from top to bottom successively with feed liquor valve group 19.The lengthening inner core comprises lengthening tube 7, pump barrel 13 and lengthening tube 17 down, the two ends of pump barrel 13 respectively by pump barrel under box cupling 10 and the pump barrel box cupling 16 with on lengthening tube 7 and following the lengthening tins 17 be connected, the length of its pump barrel 13 is any one between the 3.0m-9.7m.Below the feed liquor valve group 19 of inner core assembly, anchoring device 21 is set.Seal 4 is installed in the stuffing box gland 5 of outer barrel assembly, and twin-stage sealing 6 is set between seal 4 and stuffing box gland 5, adopts rubber and copper sheathing twin-stage combination seal, and sealability is reliable.Plunger piston assembly comprises rod connector 1, upper connecting rod 2, lower link 8, plunger 12 and liquid valve group 14, above-mentioned each parts connect from top to bottom successively, the length of its plunger 12 is longer than the length of the pump barrel 13 of lengthening inner core, the i.e. length that is shorter in length than plunger 12 of pump barrel 13.The length of plunger 12 can be designed as any one between the 3.0m-9.7m, as: 4.5m, 6.3m, 7.8m etc.Anchoring device 21 is placed in the inner chamber of following oil connection 20 of outer barrel assembly.
Though all designed upper and lower lengthening tube 7 and 17 at the two ends of pump barrel 13, the pump barrel of more conventional oil well pump is compared, the pump barrel length of pump barrel 13 is still longer.Referring to Fig. 2 and Fig. 3, plunger 12 leaves under the situation of certain seal section guaranteeing, lengthening tube 17 down, pump barrel 13 and on to-and-fro motion between the lengthening tube 7, realize the ultra-long-stroke oil pumping.
Claims (9)
1. one kind adds the long stroke oil well pump, comprise outer barrel assembly, inner core assembly and plunger piston assembly, plunger piston assembly places in the inner core assembly, the inner core assembly places in the outer barrel assembly, it is characterized in that the inner core assembly is provided with the lengthening inner core, the plunger of plunger piston assembly (12) to-and-fro motion in the lengthening inner core of inner core assembly.
2. a kind of long stroke oil well pump that adds according to claim 1 is characterized in that the inner core assembly comprises seal (4), lengthening inner core and feed liquor valve group (19), and seal (4), lengthening inner core are connected from top to bottom successively with feed liquor valve group (19).
3. a kind of long stroke oil well pump that adds according to claim 2, it is characterized in that described lengthening inner core comprises lengthening tube (7), pump barrel (13) and lengthening tube (17) down, the two ends of pump barrel (13) respectively by pump barrel under box cupling (10) and the pump barrel box cupling (16) be connected with following extend tin (17) with last lengthening tin (7).
4. a kind of long stroke oil well pump that adds according to claim 2 is characterized in that in the below of the feed liquor valve group (19) of inner core assembly anchoring device (21) being set.
5. a kind of long stroke oil well pump that adds according to claim 2 is characterized in that seal (4) is installed in the stuffing box gland (5) of outer barrel assembly, and twin-stage sealing (6) is set between seal (4) and stuffing box gland (5).
6. a kind of long stroke oil well pump that adds according to claim 1 is characterized in that plunger piston assembly comprises rod connector (1), upper connecting rod (2), lower link (8), plunger (12) and liquid valve group (14), and described each parts connect from top to bottom successively.
7. according to claim 1 or 6 described a kind of long stroke oil well pumps that add, it is characterized in that the length of plunger (12) is longer than the length of the pump barrel (13) of lengthening inner core.
8. according to claim 1 or 6 described a kind of long stroke oil well pumps that add, the length that it is characterized in that described plunger (12) is any one size between the 3.0m-9.7m.
9. a kind of long stroke oil well pump that adds according to claim 4 is characterized in that described anchoring device (21) is arranged in the inner chamber of following oil connection (20) of outer barrel assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202348721U CN201696271U (en) | 2010-06-10 | 2010-06-10 | Lengthened stroke oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202348721U CN201696271U (en) | 2010-06-10 | 2010-06-10 | Lengthened stroke oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201696271U true CN201696271U (en) | 2011-01-05 |
Family
ID=43397513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202348721U Expired - Fee Related CN201696271U (en) | 2010-06-10 | 2010-06-10 | Lengthened stroke oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201696271U (en) |
-
2010
- 2010-06-10 CN CN2010202348721U patent/CN201696271U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20180610 |