CN220354017U - Variable displacement oil pump with displacement changing along with stratum liquid supply - Google Patents
Variable displacement oil pump with displacement changing along with stratum liquid supply Download PDFInfo
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- CN220354017U CN220354017U CN202320997755.8U CN202320997755U CN220354017U CN 220354017 U CN220354017 U CN 220354017U CN 202320997755 U CN202320997755 U CN 202320997755U CN 220354017 U CN220354017 U CN 220354017U
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- pump cylinder
- discharge valve
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- 239000007788 liquid Substances 0.000 title claims abstract description 74
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 34
- 239000003129 oil well Substances 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000007789 sealing Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 19
- 238000005086 pumping Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model provides a displacement of variable oil-well pump with stratum liquid supply variation, the pump diameter of last pump barrel is less than the pump diameter of lower pump barrel, the length of last pump barrel is less than the length of last piston, the length of lower pump barrel is greater than the length of lower piston, go up piston, the UNICOM joint, double-acting pump valve, lower piston connects gradually, there is the UNICOM groove on the UNICOM joint, lower pump barrel suit is outside lower piston, the lower part of pump barrel is installed to the feed liquor valve, the disk seat of fluid-discharge valve is laid in the upper end of lower pump barrel, the case of fluid-discharge valve is installed on last pump barrel, go up pump barrel suit on last piston, the fluid-discharge valve cover is connected with the upper portion of lower pump barrel, the external diameter of the case of fluid-discharge valve is greater than the internal diameter of fluid-discharge valve's disk seat, both can cooperate the sealing when the case of fluid-discharge valve falls to the disk seat of fluid-discharge valve, fluid-discharge valve cover inside has the sieve mesh, sieve mesh position can keep up pump barrel, when stratum liquid supply is strong, the oil well output is large-discharge production, when stratum liquid supply ability weakens, the volume production by the feedback pump that forms is small-discharge volume production, can automatic variable production.
Description
Technical Field
The utility model belongs to an oil pump for oil pumping in an oil field, and relates to a variable displacement oil pump with displacement changing along with stratum fluid supply.
Background
Some pumping wells have strong stratum liquid supply capacity at the initial stage of pumping, high working fluid level in the sleeve, high liquid yield and large discharge capacity of the required pumping pump. In the later stage of well opening, the stratum liquid supply capacity is deteriorated, the working fluid level in the sleeve is lowered, the liquid yield is lowered, and the discharge capacity of the oil pump is required to be reduced. The existing common oil pump cannot adapt to the change and the requirement, only the oil pumping pipe column is lifted out and then is put into the oil pumping pipe column with small pump diameter, so that on one hand, the oil well production is interrupted, the oil well yield is influenced, the migration in the oil layer is disturbed, and the influence is caused on the later oil extraction; on the other hand, the power equipment is needed to be arranged, the existing pipe column is lifted out, and then a new deep-drawing pipe column is put in, so that the operation cost of an oil well is increased.
In order to overcome the problems, the technical staff develop a variable displacement oil pump, so that the oil pump is produced by a large displacement pump at the beginning of well opening, and the oil pump is produced by a small displacement pump after the yield is reduced and the liquid supply capacity is reduced. The existing variable displacement pump does not need to lift all pipe columns, but the operations of bumping the pump or lifting a sucker rod or lowering a sucker rod, etc. are performed at a wellhead, and the operations need to stop pumping for a certain time (a few hours if smooth), and power equipment is still needed to be arranged; because the underground tool is required to be operated to realize variable displacement during ground operation, the problem of reliability of the tool also exists, and the problem that the underground tool cannot be operated reliably often occurs, so that the success rate of variable displacement is less than 90%.
The existing variable displacement pump is stopped for a few hours when the displacement is changed, sand grains contained in oil on the pump sink in the period of time, the pump is blocked by sand or buried by sand, the pumping is difficult to restart or the production can not be restarted, and the sand removal of a pipe column is required to be carried out in the operation of loading, so that great economic loss is generated.
Disclosure of Invention
The utility model aims to design a variable displacement oil pump with displacement changing along with stratum liquid supply, overcomes the defects in the prior art, improves the reliability of variable displacement, prolongs the production period of an oil well and improves the economic benefit.
The purpose of the utility model is realized in the following way: comprises a drain valve cover, a drain valve, an upper pump cylinder, an upper piston, a communicating joint, a double-acting pump valve, a lower pump cylinder, a lower piston and a liquid inlet valve, wherein the drain valve, the double-acting pump valve and the liquid inlet valve are one-way valves, well liquid can only flow from bottom to top and can not flow from top to bottom through the drain valve, the double-acting pump valve and the liquid inlet valve, the upper piston can be sealed with the upper pump cylinder in a matched manner, the lower piston can be sealed with the lower pump cylinder in a matched manner, the pump diameter of the upper pump cylinder is smaller than that of the lower pump cylinder, the length of the upper pump cylinder is smaller than that of the upper piston, the length of the lower pump cylinder is longer than that of the lower piston, the upper piston, the communicating joint, the double-acting pump valve and the lower piston are sequentially connected, the communicating joint is provided with a communicating groove, the lower pump cylinder is sleeved outside the lower piston, the liquid inlet valve is arranged at the lower part of the lower pump cylinder, the valve seat of the drain valve is arranged at the upper end of the lower pump cylinder, the valve core of the liquid discharge valve is arranged on the upper pump cylinder, the upper pump cylinder is sleeved on the upper piston, the liquid discharge valve cover is connected with the upper part of the lower pump cylinder, the valve seat of the liquid discharge valve is fixed, the valve seat of the liquid discharge valve is kept sealed with the liquid discharge valve cover, the valve seat of the liquid discharge valve is kept sealed with the lower pump cylinder, the outer diameter of the valve core of the liquid discharge valve is larger than the inner diameter of the valve seat of the liquid discharge valve, when the valve core of the liquid discharge valve falls on the valve seat of the liquid discharge valve, the two valve cores can be matched and sealed, sieve holes are formed in the liquid discharge valve cover, the sieve hole parts can block the upper pump cylinder, the effect of limiting the upward movement range of the upper pump cylinder is achieved, well liquid can flow upwards through the sieve holes, an upper pump cavity is formed between the outer wall of the upper piston and the inner wall of the lower pump cylinder due to the diameter difference of the upper pump cavity, and a lower pump cavity is formed by the inner wall of the lower piston.
The beneficial effects of the utility model are as follows: when the liquid supply capacity is strong, the oil well output is pumped by a large displacement pump composed of a double-acting pump valve, a lower pump cylinder, a lower piston and a liquid inlet valve, and when the liquid supply capacity is weakened, the oil well output is pumped by a feedback pump composed of an upper pump cylinder, an upper piston, a pump cylinder joint, a liquid discharge valve, an inter-valve joint, a double-acting pump valve, a lower pump cylinder and a lower piston, so that the oil well output is suitable for the requirement of the oil well liquid output after the stratum liquid supply capacity is changed, the automatic variable displacement production is realized, no operation is needed, the problem of unreliable variable displacement is solved, the power equipment is not needed when the displacement is changed, the well is not stopped, the defects existing in the prior art are overcome, the oil well production period is prolonged, the oil well output is improved, and the economic benefit is remarkable.
Drawings
Fig. 1 is a structural diagram of the present utility model.
Fig. 2 is a structural view of the upper part in fig. 1.
Fig. 3 is a structural view of the lower part of fig. 1.
Description of the embodiments
An embodiment of the present utility model will be described with reference to fig. 1.
As can be seen from fig. 1, the embodiment of the present utility model includes a drain valve cover 1, a drain valve 2, an upper pump barrel 3, an upper piston 4, a communication joint 5, a double-acting pump valve 6, a lower pump barrel 7, a lower piston 8, and a liquid inlet valve 10, wherein the drain valve 2, the double-acting pump valve 6, and the liquid inlet valve 10 are one-way valves, well fluid can only flow from bottom to top through the drain valve 2, the double-acting pump valve 6, and the liquid inlet valve 10, and cannot flow from top to bottom, the upper piston 4 can be sealed with the upper pump barrel 3, the lower piston 8 can be sealed with the lower pump barrel 7, the pump diameter of the upper pump barrel 3 is smaller than the pump diameter of the lower pump barrel 7, the length of the upper pump barrel 3 is smaller than the length of the upper piston 4, the length of the lower pump barrel 7 is greater than the length of the lower piston 8, the upper piston 4, the communication joint 5, the double-acting pump valve 6, and the lower piston 8 are sequentially connected, a groove 5-1 is provided on the communication joint 5, the lower pump barrel 7 is sleeved outside the lower piston 8, the liquid inlet valve 10 is arranged at the lower part of the lower pump barrel 7, the valve seat of the liquid discharge valve 2 is arranged at the upper end of the lower pump barrel 7, the valve core of the liquid discharge valve 2 is arranged on the upper pump barrel 3, the upper pump barrel 3 is sleeved on the upper piston 4, the liquid discharge valve cover 1 is connected with the upper part of the lower pump barrel 7, the valve seat of the liquid discharge valve 2 is fixed, the valve seat of the liquid discharge valve 2 and the liquid discharge valve cover 1 are kept sealed, the valve seat of the liquid discharge valve 2 and the lower pump barrel 7 are kept sealed, the outer diameter of the valve core of the liquid discharge valve 2 is larger than the inner diameter of the valve seat of the liquid discharge valve 2, when the valve core of the liquid discharge valve 2 falls onto the valve seat of the liquid discharge valve 2, the two can be matched and sealed, the sieve holes 1-1 are arranged in the liquid discharge valve cover 1, the sieve holes 1-1 part can block the upper pump barrel 3, the upward movement range of the upper pump barrel 3 is limited, the well liquid can flow upwards through the sieve holes 1-1, the upper pump cavity 7-1 is formed between the outer wall of the upper piston 4 and the inner wall of the lower pump cylinder 7 due to the diameter difference of the upper pump cavity 7-1, and the lower pump cavity 7-2 is formed by the upper part of the liquid inlet valve 10, the inner wall of the lower pump cylinder 7 and the lower part of the lower piston 8.
In the embodiment of the utility model, a set of check valve 9 is also installed at the lower part of the lower piston 8, and the check valve 9 has the same function as the double-acting pump valve 6 and can replace the double-acting pump valve 6, so that if the check valve 9 is installed at the lower part of the lower piston 8 and the double-acting pump valve 6 is not installed at the upper part, the protection scope of the utility model is also provided.
The valve core of the drain valve 2 may be installed at the upper part, the lower part, or the middle part of the upper pump cylinder 3, and the valve core of the drain valve 2 is within the scope of the present utility model no matter where the valve core is installed at the upper pump cylinder 3.
When the initial oil pumping is carried out after the random oil pumping pipe column is lowered into the well, the working fluid level in the sleeve is high, the liquid supply capacity is high, when the liquid supply amount of an oil well is larger than the displacement of the upper pump cavity 7-1, the large displacement pump consisting of the double-acting pump valve 6, the lower pump cylinder 7, the lower piston 8 and the liquid inlet valve 10 is pumped, and the oil pumping cavity is the lower pump cavity 7-2, and the working principle is the same as that of a common pump.
After a period of pumping, the working fluid level in the sleeve is lowered, the stratum fluid supply capacity is weakened, and when the fluid supply amount of an oil well is smaller than the displacement of the upper pump cavity 7-1, a feedback pump consisting of the upper pump cylinder 3, the upper piston 4, the liquid discharge valve 2, the communication joint 5, the double-acting pump valve 6, the lower pump cylinder 7 and the lower piston 8 is used for pumping, and the displacement is the displacement generated by the upper pump cavity 7-1. The working principle is as follows: during the down stroke, the liquid discharge valve 2 is closed, the volume of the upper pump cavity 7-1 is increased, the pressure is reduced, the double-acting pump valve 6 is opened, and the well liquid in the lower pump cavity 7-2 enters the upper pump cavity 7-1 through the communicating groove 5-1; on the upstroke, the double-acting pump valve 6 is closed, the volume of the upper pump chamber 7-1 is reduced, the pressure is increased, the drain valve 2 is opened, and the well fluid in the upper pump chamber 7-1 is discharged onto the drain valve cover 1.
From the above, the working fluid level in the sleeve is lowered, when the fluid supply capacity is weakened, the production can be automatically changed in displacement, any operation is not needed, the problem of unreliable variable displacement is avoided, power equipment is not needed in the process of variable displacement, well stopping is not needed, and the purpose of the utility model is achieved.
The double-acting pump valve 6 also plays a role of a liquid discharge valve in large-displacement production, and the double-acting pump valve 6 plays a role of a liquid inlet valve in variable-displacement production, so the double-acting pump valve is a double-acting pump valve.
The upper pump cylinder 3, the upper piston 4, the lower pump cylinder 7, the lower piston 8, the double-acting pump valve 6 and the liquid inlet valve 10 are standard components.
The utility model has feedback force after variable displacement, and is very suitable for the steam huff-puff post-production of the heavy oil well.
Claims (1)
1. The utility model provides a displacement of oil-well pump along with stratum feed liquid change, including flowing back valve bonnet (1), flowing back valve (2), go up pump cylinder (3), go up piston (4), UNICOM connects (5), double-acting pump valve (6), lower pump cylinder (7), lower piston (8), feed liquor valve (10), flowing back valve (2), double-acting pump valve (6), feed liquor valve (10) are the check valve, well liquid can only flow from bottom to top through flowing back valve (2), double-acting pump valve (6), feed liquor valve (10), can not flow from top to bottom, go up piston (4) can with last pump cylinder (3) supporting seal, lower piston (8) can with lower pump cylinder (7) supporting seal, characterized by: the pump diameter of the upper pump cylinder (3) is smaller than that of the lower pump cylinder (7), the length of the upper pump cylinder (3) is smaller than that of the upper piston (4), the length of the lower pump cylinder (7) is larger than that of the lower piston (8), the upper piston (4), the communication joint (5), the double-acting pump valve (6) and the lower piston (8) are sequentially connected, the communication joint (5) is provided with a communication groove (5-1), the lower pump cylinder (7) is sleeved outside the lower piston (8), the liquid inlet valve (10) is arranged at the lower part of the lower pump cylinder (7), the valve seat of the liquid discharge valve (2) is arranged at the upper end of the lower pump cylinder (7), the valve core of the liquid discharge valve (2) is arranged on the upper pump cylinder (3), the upper pump cylinder (3) is sleeved on the upper piston (4), the liquid discharge valve cover (1) is connected with the upper part of the lower pump cylinder (7), the valve seat of the liquid discharge valve (2) is fixed, the valve seat of the liquid discharge valve (2) is kept sealed with the liquid discharge cover (1), the valve seat of the liquid discharge valve (2) is sealed between the lower pump cylinder (7) and the liquid discharge valve seat (2) is kept at the inner diameter of the valve (1) of the valve seat (2), the valve core is matched with the valve seat (2) when the valve seat (2) is sealed, the screen hole (1-1) can block the upper pump cylinder (3), plays a role in limiting the upward movement range of the upper pump cylinder (3), well liquid can flow upwards through the screen hole (1-1), an upper pump cavity (7-1) is formed between the outer wall of the upper piston (4) and the inner wall of the lower pump cylinder (7) due to the diameter difference of the outer wall and the inner wall, and a lower pump cavity (7-2) is formed between the upper part of the liquid inlet valve (10), the inner wall of the lower pump cylinder (7) and the lower part of the lower piston (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320997755.8U CN220354017U (en) | 2023-04-27 | 2023-04-27 | Variable displacement oil pump with displacement changing along with stratum liquid supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320997755.8U CN220354017U (en) | 2023-04-27 | 2023-04-27 | Variable displacement oil pump with displacement changing along with stratum liquid supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220354017U true CN220354017U (en) | 2024-01-16 |
Family
ID=89482848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320997755.8U Active CN220354017U (en) | 2023-04-27 | 2023-04-27 | Variable displacement oil pump with displacement changing along with stratum liquid supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220354017U (en) |
-
2023
- 2023-04-27 CN CN202320997755.8U patent/CN220354017U/en active Active
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