CN113074101B - Pull rod type gas-proof sand-proof oil pump - Google Patents
Pull rod type gas-proof sand-proof oil pump Download PDFInfo
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- CN113074101B CN113074101B CN202010009852.2A CN202010009852A CN113074101B CN 113074101 B CN113074101 B CN 113074101B CN 202010009852 A CN202010009852 A CN 202010009852A CN 113074101 B CN113074101 B CN 113074101B
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- plunger
- pull rod
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- oil
- proof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
- F04B53/125—Reciprocating valves
- F04B53/129—Poppet valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The utility model provides a pull rod type gas-proof sand-proof oil pump, comprising: the upper end of the pump cylinder is connected with the upper pump joint; a plunger coupled within the pump barrel; the plunger pull rod penetrates through the plunger inner cavity, a plunger limiting mechanism connected with the plunger is arranged in the middle of the plunger pull rod, and a sealing ring is connected to the lower part of the plunger pull rod; the fixed valve is connected to the lower end of the pump barrel; and the plunger rod is configured to: and a sealing ring on the plunger pull rod is matched with the plunger to seal to complete the oil absorption of the upstroke, and the plunger limiting mechanism is matched with the plunger to push the plunger to downwards force liquid discharge. The oil pump adopts the plunger opening channel which is forced to be opened and closed, improves the pump efficiency and enlarges the application range of the oil pump.
Description
Technical Field
The utility model belongs to the technical field of oil extraction equipment, and particularly relates to the oil extraction equipment suitable for high-gas-content oil well production; in particular to a pull rod type gas-proof sand-proof oil pump.
Background
When the plunger of the conventional oil pump is in the downstroke, the traveling valve is opened to drain, but the valve is opened and needs to be started under pressure. When the gas content in the pump cylinder is large, the valve opening is delayed and even can not be opened due to the compressibility of the gas, so that the pump efficiency and even the airlock are reduced. Meanwhile, the oil outlet of the existing oil pump is arranged at the upper part of the large plunger, so that the pump is easy to be blocked.
Patent CN207268211U discloses a long plunger sand control pump suitable for sleeves with more than four inches, which comprises a shell, a pump cylinder positioned in the shell and a plunger positioned in the pump cylinder and making relative motion with the pump cylinder, wherein the top of the plunger is connected with an upper traveling valve cover, the bottom of the plunger is connected with a lower traveling valve cover, and the upper end and the lower end of the shell are respectively connected with an upper sealing joint and a lower sealing joint; the pump cylinder consists of a working pump cylinder and a centralizing pump cylinder which are connected up and down through a middle sealing joint, wherein a centralizing joint is arranged between the working pump cylinder and the shell, the bottom of the centralizing pump cylinder is connected with the lower sealing joint, and a sand setting cavity is formed between the pump cylinder and the shell; the length of the plunger is greater than or equal to 1.5 m, the outer diameter of the plunger is less than or equal to 46 mm, and the outer diameter of the shell is less than or equal to 73 mm. The utility model is used for sand prevention production of the sidetracking oil well, so that the sidetracking well pumping pipe column can be used for effective sand prevention production.
Patent CN1370927a discloses a hydraulic feedback sand control pump for flexible continuous sucker rod, and the hydraulic feedback sand control pump for flexible continuous sucker rod has the advantages that: the upper plunger and the lower plunger with different sectional areas and the upper pump cylinder and the lower pump cylinder matched with the upper plunger and the lower plunger are adopted to pump well liquid, and because of the sectional area difference of the plunger and the liquid column pressure in the oil pipe and the liquid column pressure difference in the oil jacket annulus, a downward liquid column feedback force is generated, so that the sucker rod obtains an additional thrust in the descending process, the sucker rod is helped to descend, the flexible sucker rod is under the action of pulling force in the up-down stroke, the sucker rod cannot be twisted, and the alternating load born by the sucker rod is reduced. Avoid sand card, avoid the airlock phenomenon of pump, improve the fullness of pump.
The prior art mainly has the following problems:
1) The gas content of the oil well in the northbound oil field is larger, the travelling valve is opened to drain liquid during the downstroke of the plunger of the conventional oil pump, but the valve is opened and the starting pressure is required. When the gas content in the pump cylinder is large, the valve is delayed or even can not be opened due to the compressibility of the gas, so that the pump efficiency and even the airlock are reduced;
2) The oil outlet of the existing oil pump is arranged at the upper part of the large plunger, and the foreign matters cannot be washed in the oil outlet process because of no device for preventing the pump from being blocked, so that the pump is blocked easily;
3) The existing gas-proof mode of the gas-containing oil well mainly comprises matched gas-proof sand-proof matched equipment, the effect is not ideal, the gas needs to be exhausted from the sleeve, and the pumping efficiency of the oil pump can be influenced when the gas is exhausted in time.
4) Through improving the structure of the pump, the gas-proof principle is converted, a travelling valve is canceled, and an oil flow channel is forcedly opened in a mechanical mode, so that the gas-proof function is realized.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the utility model provides a pull rod type gas-proof sand-proof oil pump, which adopts a plunger opening channel which is forcedly opened and closed, improves the pump efficiency and expands the application range of the oil pump.
In order to achieve the above object, the present utility model provides a pull rod type gas-proof and sand-proof oil pump, comprising:
the upper joint of the pump is provided with a connecting hole,
the upper end of the pump cylinder is connected with an upper joint of the pump;
a plunger coupled within the pump barrel;
the plunger pull rod penetrates through the plunger inner cavity, a plunger limiting mechanism connected with the plunger is arranged in the middle of the plunger pull rod, and a sealing ring is connected to the lower part of the plunger pull rod; and
the fixed valve is connected to the lower end of the pump cylinder;
and the plunger rod is configured to:
and a sealing ring on the plunger pull rod is matched with the plunger to seal to complete the oil absorption of the upstroke, and the plunger limiting mechanism is matched with the plunger to push the plunger to downwards force liquid discharge.
In one embodiment, the upper end of the plunger pull rod is fixedly connected with a plunger upper joint, and the plunger upper joint is of a U-shaped structure with a cavity formed inside.
In one embodiment, the plunger is of a cylindrical structure with a hollow middle part, and an annular limiting groove matched with the plunger limiting mechanism is formed in the middle of the plunger.
In one embodiment, the plunger limiting mechanism is a petal-shaped structure fixedly connected to the plunger pull rod, and the diameter and the height of the limiting groove are both larger than those of the plunger limiting mechanism.
In one embodiment, the upper end surface of the plunger is provided with an inwardly sloping bevel.
In one embodiment, a pump cavity is formed between the pump barrel, the plunger pull rod, the plunger and the fixed valve.
In one embodiment, the lower part of the plunger is provided with an inward inclined bevel, and a sealing ring on the plunger pull rod is matched with the lower end surface of the plunger to seal to finish the up-stroke oil absorption.
In one embodiment, when the upstroke starts, the plunger is at the bottommost end of the pump cylinder, the limiting device on the plunger pull rod and the sealing ring are at the bottommost end, the plunger pull rod drives the sealing ring to move upwards to contact with the plunger for sealing, the pressure in the pump cavity is reduced, the fixed valve is opened, and the oil-gas mixture enters the pump cavity from the fixed valve; when the highest point of the upstroke is reached, the pump cavity is filled with the maximum amount of crude oil, and the upstroke is finished to complete the oil suction function.
In one embodiment, the downstroke forced drain function is achieved when the plunger pull rod moves downward against a limit groove in the plunger and pushes the plunger downward.
In one embodiment, when the downstroke begins, the plunger descends at the uppermost end of the pump barrel, the plunger pull rod and the plunger simultaneously, the sealing ring and the plunger are forcedly separated, the oil discharge channel is opened, meanwhile, the pull rod limiting structure descends to drive the plunger to compress the oil-gas mixture in the pump cavity, the fixed valve is closed, crude oil is discharged from the annular space between the plunger and the plunger pull rod until the downstroke is at the lowest point, and the downstroke is finished to complete the oil discharge function of the pump cavity.
Compared with the prior art, the utility model has the advantages that:
the pull rod type gas-proof sand-proof oil pump has no valve design, but the plunger has an annular flow passage in the middle part, and liquid discharge can be forcedly opened during the downstroke. Meanwhile, aiming at the problems that the conventional plunger of the oil pump adopts a floating valve, the valve needs to be opened and closed at the lowest, and the pump efficiency is greatly influenced by gas, the utility model adopts a mechanical opening valve-free design, and does not need to start pressure, thereby improving the pump efficiency. In addition, aiming at the problem that the pump is easy to clamp caused by a conventional oil pump liquid outlet hole at the upper part of the plunger, the utility model is provided with the anti-clamping bevel structure at the upper part of the plunger, thereby reducing the possibility of sand clamping and reducing the pump clamping. In addition, aiming at the problem that the valve of the conventional oil pump needs to start pressure, the utility model designs a sealing ring on the plunger pull rod to replace the valve, thereby improving the pump efficiency.
Drawings
Preferred embodiments of the present utility model will be described in detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic sectional view of a pull rod type gas-proof and sand-proof oil pump of the present utility model.
Fig. 2 is a schematic top view of the tie rod of fig. 1.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
In order to make the technical solution and advantages of the present utility model more apparent, exemplary embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some of the embodiments of the present utility model and are not exhaustive of all embodiments. And embodiments of the utility model and features of the embodiments may be combined with each other without conflict.
The inventor notices that the floating valve is opened to drain liquid in the process of the utility model when the conventional oil pump plunger is in the downstroke, but the valve is opened and needs to be started under pressure, when the gas content in the pump cylinder is large, the valve is delayed or even can not be opened due to the compressibility of the gas, and the pump efficiency and even the airlock are reduced.
In order to overcome the defects, the embodiment of the utility model provides a pull rod type gas-proof and sand-proof oil pump, and the detailed description is given below.
Fig. 1 is a schematic sectional view of one embodiment of a pull rod type gas-proof and sand-proof oil pump according to the present utility model. Fig. 2 is a schematic top view of the pull rod in the pull rod type gas-proof sand-proof oil pump of the utility model.
Fig. 1 and 2 show one embodiment of the pull rod type gas-proof and sand-proof oil pump of the present utility model. The pull rod type gas-proof sand-proof oil pump adopts a female buckle at the upper part and the lower part, wherein the upper part of the pull rod type gas-proof sand-proof oil pump is connected with an oil pipe, and the lower part of the pull rod type gas-proof sand-proof oil pump is connected with a tail pipe. In the embodiment shown in fig. 1, the pull rod type gas-proof and sand-proof oil pump mainly comprises: the pump upper joint 1, the pump barrel 3, the plunger 4, the plunger pull rod 5 and the fixed valve 10. Wherein, the upper end of the pump cylinder 3 is connected with the pump upper joint 1. A plunger 4 is connected within the pump barrel 3. The plunger pull rod 5 passes through the inner cavity of the plunger 4 and is provided with a plunger limiting mechanism 6 connected with the plunger 4 in the middle, and the lower part of the plunger pull rod 5 is connected with a sealing ring 7. The fixed valve 10 is connected to the lower end of the pump cylinder 3. And the plunger rod 5 is configured to: the sealing ring 7 on the plunger pull rod 5 is matched with the plunger 4 to seal to finish the oil absorption of the upstroke, and the plunger limiting mechanism 6 is matched with the plunger 4 to push the plunger 4 to move downwards to forcedly drain.
In one embodiment, as shown in fig. 1 and 2, the upper end of the plunger rod 5 is fixedly connected with the plunger upper joint 2. Preferably, the upper end of the plunger pull rod 5 is fixedly connected with the plunger upper joint 2 in an integrated manner. The plunger upper joint 2 has a U-shaped structure with a cavity formed therein.
In one embodiment, as shown in fig. 1 and 2, the plunger 4 is a cylindrical structure with a hollow middle part, and an annular limit groove 9 matched with the plunger limit mechanism 6 is formed in the middle part of the plunger 4.
In one embodiment, as shown in fig. 1 and 2, the plunger stopper mechanism 6 is a petal-like structure fixedly attached to the plunger rod 5. The diameter and the height of the limit groove 9 are respectively larger than those of the plunger limit mechanism 6. It will be readily appreciated that the diameter of the plunger upper fitting 2 is smaller than the diameter of the plunger stop mechanism 6.
In one embodiment, as shown in fig. 1 and 2, the upper end surface of the plunger 4 is provided with an inwardly sloping bevel 8. The bevel structure can prevent sand from being blocked and a pump from being blocked.
In one embodiment, as shown in fig. 1 and 2, a pump chamber 11 is formed between the pump cylinder 3, the plunger rod 5, the plunger 4 and the fixed valve 10.
In one embodiment, as shown in fig. 1 and 2, the lower portion of the plunger 4 is provided with an inwardly sloping bevel. The sealing ring 7 on the plunger pull rod 5 is matched with the bevel angle of the lower end surface of the plunger to seal so as to finish the up-stroke oil absorption. The design of the lower bevel facilitates the downward movement and upward sealing of the sealing ring 7.
In one embodiment, as shown in fig. 1 and 2, when the up stroke starts, the plunger 4 is at the bottommost end of the pump barrel 3, the plunger limiting mechanism 6 and the sealing ring 7 on the plunger pull rod 5 are at the bottommost end, the plunger pull rod 5 moves upwards to drive the sealing ring 7 to contact and seal with the plunger 4, the pressure in the pump cavity 11 is reduced, the fixed valve 10 is opened, and the oil-gas mixture of crude oil and mixed gas enters the pump cavity 11 from the fixed valve 10. When the highest point of the upstroke is reached, the pump chamber 11 is filled with the greatest amount of crude oil. And the oil pump finishes the oil suction function after the upper stroke is finished.
In one embodiment, as shown in fig. 1 and 2, the downstroke forced drain function is achieved when the plunger rod 5 moves down against the limit groove 9 in the plunger 4 and pushes the plunger 4 downward.
In one embodiment, as shown in fig. 1 and 2, at the beginning of the downstroke, the plunger 4 is at the uppermost end of the pump barrel 3, the plunger rod 5 and the plunger 4 are simultaneously lowered, the seal ring 7 is forcibly separated from the plunger 4, and the oil discharge passage is opened. Meanwhile, the pull rod limiting structure 6 descends to drive the plunger 4 to compress the oil-gas mixture in the pump cavity 11, the fixed valve 10 is closed, crude oil is discharged from an annulus between the plunger 4 and the plunger pull rod 5 until the lowest point of the downstroke, and the downstroke is finished, so that the oil-well pump provided by the utility model finishes the oil discharging function of the pump cavity 11.
In one embodiment, as shown in fig. 1 and 2, the pull rod type gas-proof sand-proof oil pump of the utility model has the following working principle:
the up stroke process is as follows: the plunger 4 is at the bottommost end of the pump barrel 3, the limiting mechanism 6 and the sealing ring 7 on the plunger pull rod 5 are at the bottommost end, the plunger pull rod 5 moves upwards and drives the sealing ring 7 to move upwards, the sealing ring 7 contacts with the plunger 4 to seal and move upwards, the pressure in the pump cavity 11 is reduced, the fixed valve 10 is opened, and crude oil and mixed gas enter the pump cavity 11 from the fixed valve 10. When the highest point of the upstroke is reached, the pump cavity 11 is filled with the maximum amount of crude oil, and the upstroke is finished, so that the crude oil sucking function is finished.
The following stroke process: at the uppermost end of the pump cylinder 3, the plunger 4 and the plunger pull rod 5 are simultaneously lowered, the sealing ring 7 is forcedly separated from the plunger 4, and the oil discharge channel is opened. Meanwhile, the pull rod limiting mechanism 6 descends to drive the plunger to compress crude oil and mixed gas in the pump cavity 11, and the fixed valve 10 is closed. Crude oil is discharged from the annulus between the plunger 4 and the plunger rod 5 until the bottom of the downstroke. And the oil discharging function of the pump cavity is completed after the downstroke is finished. The oil extraction function of the oil pump is realized by circularly repeating the steps.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all alterations and/or modifications that fall within the scope of the utility model, and that are intended to be included within the scope of the utility model.
Claims (6)
1. The utility model provides a pull rod formula prevents gas sand control oil-well pump which characterized in that includes:
the upper joint of the pump is provided with a connecting hole,
the upper end of the pump cylinder is connected with an upper joint of the pump;
a plunger coupled within the pump barrel;
the plunger pull rod penetrates through the plunger inner cavity, the middle part of the plunger pull rod is provided with a plunger limiting mechanism connected with the plunger, the lower part of the plunger pull rod is connected with a sealing ring, the upper end of the plunger pull rod is integrally and fixedly connected with a plunger upper joint, and the plunger upper joint is of a U-shaped structure with a cavity formed inside; and
the fixed valve is connected to the lower end of the pump cylinder;
and the plunger rod is configured to:
the sealing ring on the plunger pull rod is matched with the plunger to seal to complete the oil absorption of the upper stroke, the plunger limiting mechanism is matched with the plunger to push the plunger to downwards force the liquid to drain,
the plunger is of a cylindrical structure with a hollow middle part, an annular limiting groove matched with a plunger limiting mechanism is formed in the middle of the plunger, the plunger limiting mechanism is of a petal-shaped structure fixedly connected to a plunger pull rod, the diameter and the height of the limiting groove are both larger than those of the plunger limiting mechanism, an inward-inclined bevel is arranged at the lower part of the plunger, and a sealing ring on the plunger pull rod is matched with the lower end face of the plunger to seal so as to finish upstroke oil absorption.
2. The pull rod type gas-proof and sand-proof oil pump of claim 1, wherein the upper end surface of the plunger is provided with an inward inclined bevel.
3. The pull rod type gas-proof and sand-proof oil pump according to claim 2, wherein a pump cavity is formed among the pump cylinder, the plunger pull rod, the plunger and the fixed valve.
4. The pull rod type gas-proof sand-proof oil pump according to claim 3, wherein when the upstroke starts, the plunger is at the bottommost end of the pump barrel, the limiting device on the plunger pull rod is at the bottommost end with the sealing ring, the plunger pull rod drives the sealing ring to move upwards to be in contact with the plunger for sealing, the pressure in the pump cavity is reduced, the fixed valve is opened, and the oil-gas mixture enters the pump cavity from the fixed valve; when the highest point of the upstroke is reached, the pump cavity is filled with the maximum amount of crude oil, and the upstroke is finished to complete the oil suction function.
5. The pull rod type gas-proof and sand-proof oil pump according to claim 4, wherein when the plunger pull rod moves down to abut against a limit groove in the plunger and push the plunger to move down, a down-stroke forced liquid discharge function is realized.
6. The pull rod type gas-proof and sand-proof oil pump according to claim 5, wherein at the beginning of the downstroke, the plunger is at the uppermost end of the pump barrel, the plunger pull rod and the plunger simultaneously descend, the sealing ring and the plunger are forcedly separated, the oil discharge channel is opened, meanwhile, the pull rod limiting structure descends to drive the plunger to compress the oil-gas mixture in the pump cavity, the fixed valve is closed, crude oil is discharged from the annular space between the plunger and the plunger pull rod until the downstroke is at the lowest point, and the downstroke is completed, thereby completing the oil discharge function of the pump cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009852.2A CN113074101B (en) | 2020-01-06 | 2020-01-06 | Pull rod type gas-proof sand-proof oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009852.2A CN113074101B (en) | 2020-01-06 | 2020-01-06 | Pull rod type gas-proof sand-proof oil pump |
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| Publication Number | Publication Date |
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| CN113074101A CN113074101A (en) | 2021-07-06 |
| CN113074101B true CN113074101B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010009852.2A Active CN113074101B (en) | 2020-01-06 | 2020-01-06 | Pull rod type gas-proof sand-proof oil pump |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201080913Y (en) * | 2007-08-29 | 2008-07-02 | 马宝忠 | Strong open-close multilevel elastic seal oil pump |
| CN103133311A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Oil pumping technology based on javelin valve anti-gas pump |
| CN202991456U (en) * | 2012-12-10 | 2013-06-12 | 长葛市福侨机电有限公司 | Novel inclined shaft thick oil pump |
| US10174752B2 (en) * | 2013-01-17 | 2019-01-08 | Innovative Oilfield Consultants Ltd Operating As Conn Pumps | Anti-gas lock valve for a reciprocating downhole pump |
| CN207093351U (en) * | 2017-09-04 | 2018-03-13 | 中国石油大学(华东) | A kind of spherical valve seat mechanical closed-open type oil well pump |
| CN110397576A (en) * | 2019-06-13 | 2019-11-01 | 中国石油化工股份有限公司 | Oil well pump |
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2020
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