CN215890402U - Self-sealing rod type oil well pump - Google Patents
Self-sealing rod type oil well pump Download PDFInfo
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- CN215890402U CN215890402U CN202220136162.8U CN202220136162U CN215890402U CN 215890402 U CN215890402 U CN 215890402U CN 202220136162 U CN202220136162 U CN 202220136162U CN 215890402 U CN215890402 U CN 215890402U
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Abstract
The utility model discloses a self-sealing rod type oil well pump, which relates to the technical field of rod type oil well pumps and comprises a pump seat and a pump body, wherein the pump body comprises a pump cylinder and a plunger assembly, the plunger assembly comprises a valve rod connector, a valve rod and a plunger which are fixedly connected up and down, the plunger assembly is arranged in the pump cylinder in a vertical sliding manner, the pump cylinder is detachably, hermetically and inserted in the pump seat through a locking connector arranged at the lower end of the pump cylinder, the upper end of the pump cylinder is connected with an upper self-sealing assembly used for sealing annular spaces of the pump cylinder and an oil pipe, the upper self-sealing assembly comprises a rubber cylinder and a self-locking piece used for locking the rubber cylinder in an expansion state, the rubber cylinder is sleeved on the self-locking piece, the self-locking piece is sleeved on the outer side of the valve rod, the valve rod connector is positioned above the rubber cylinder, and the plunger is arranged in the pump cylinder below the rubber cylinder in a vertical sliding manner; the structure of vertical fixed seal is adopted, the sealing performance of the device is improved, the oil well pump is safer and more reliable, the stress condition of the pump cylinder is improved, and the pump cylinder cannot extend under the action of a liquid column, so that the device can be used in a deep well.
Description
Technical Field
The utility model relates to the technical field of rod-type oil-well pumps, in particular to a self-sealing rod-type oil-well pump.
Background
In order to recover oil from the stratum, mechanical equipment is used to lift the crude oil in the well to the ground in the oil recovery process, an oil well pump is a main oil recovery device, and a rod oil pump is one of the oil well pumps. Compared with a tubular oil pump, the rod-type oil pump has the characteristics of no need of lifting an oil pipe when the pump is lifted, easiness in pump inspection operation and short operation time, and can greatly save the operation cost.
Commonly used rod pumps include fixed-barrel top-fixed rod pumps and fixed-barrel bottom-fixed rod pumps. The fixed cylinder type top fixed rod pump has the advantages that the top is fixed, and the pump cylinder is stressed by the composite load of internal pressure and downward stretching of a liquid column, so that the stress condition is severe; when pumping oil, the internal pressure of the pump barrel is higher than the external pressure, the inner hole of the pump barrel is increased, and the leakage is increased. The fixed cylinder type bottom fixed rod pump is fixed at the bottom, and the pump cylinder is suspended in the air, so that the pump cylinder is better in stress condition and suitable for deep wells and medium-deep wells, but sand grains are easy to deposit in annular spaces of a fixed support sleeve and a bottom locking device, and the pump lifting operation is difficult; the bottom is fixed, and the pump barrel swings greatly during operation, so that the abrasion of the valve rod and the guide sleeve is also aggravated.
In order to better use the rod pump, various research units and individuals have developed various special rod pumps, for example, chinese patent CN207513808U discloses a displacement rod type air-proof pump, which adopts a bottom fixed rod type pump structure, and forms a displacement cavity of an air-proof lock by connecting an outer tube and an upper sealing cylinder with the upper and lower seals of the rod pump through a bottom pump seat. The pump can effectively reduce the gas-liquid ratio of crude oil and prevent air lock.
The rod-type oil well pump has the advantages that the pump does not need to be lifted and lowered when the pump is lifted and lowered, and the operation of checking the pump is easy, but the position and the length of the seal are determined because the positions of the outer pipe and the upper and lower sealing cylinders are fixed. If the rod pump is damaged and taken out for maintenance and needs to be replaced, the rod pump with the same specification and length can only be replaced, and a longer or shorter oil well pump can not be replaced according to the oil production requirement. In addition, such rod pumps are relatively costly due to the addition of the upper seal and outer tube.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a self-sealing rod type oil well pump aiming at the defects in the prior art.
The technical scheme of the utility model is as follows: the utility model provides a self sealss rod-type oil-well pump, includes the pump mount and the pump body, the pump body includes pump barrel and plunger assembly, the plunger assembly includes upper and lower fixed connection's valve rod joint, valve rod and plunger, the plunger assembly slides from top to bottom and sets up in the pump barrel, the pump barrel can dismantle sealed cartridge in the pump mount through the locking joint that the lower extreme was equipped with, the pump barrel upper end is connected with the upper portion self sealss assembly that is used for sealed pump barrel and oil pipe annular space, upper portion self sealss assembly includes the rubber barrel and is used for locking the self-locking piece at expansion state with the rubber barrel, the rubber barrel suit is on the self-locking piece, the self-locking piece suit is in the outside of valve rod, valve rod joint is located the rubber barrel top, the plunger slides from top to bottom and sets up in the pump barrel of rubber barrel below.
Preferably, the self-locking piece comprises a core shaft and a supporting seat, the supporting seat is fixedly installed at the upper end of the pump cylinder, the lower part of the core shaft is arranged in the supporting seat in a sliding mode, and a locking ring is fixedly sleeved on the core shaft; the locking ring is an elastic supporting piece, an annular groove matched with the locking ring is formed in the inner wall of the supporting seat, and an inner conical table convenient for unlocking the locking ring is arranged at the upper end of the annular groove; the rubber cylinder is sleeved on the upper part of the mandrel, and the outer diameter of the rubber cylinder is larger than the inner diameter of the supporting seat; a stop cap for extruding the rubber cylinder is arranged on the outer wall of the mandrel on the upper side of the rubber cylinder, and when the lock ring is positioned in the annular groove, the rubber cylinder is sealed on the oil pipe in an expanding way;
the outer diameter of the valve rod connector is larger than the inner diameter of the mandrel, and the outer diameter of the plunger is larger than the inner diameter of the mandrel and smaller than the inner diameter of the supporting seat.
Preferably, the outer edge of the lower end of the rubber cylinder is provided with an outer conical surface, and the inner edge of the upper end of the supporting seat is provided with an inner conical surface matched with the outer conical surface.
Preferably, the locking ring is spring steel.
Preferably, the lower end of the blocking cap is fixedly connected with the upper end of the rubber cylinder, a boss is arranged at the inner edge of the lower end of the blocking cap, and a groove matched with the boss is formed in the inner edge of the upper end of the rubber cylinder.
Compared with the prior art, the utility model has the following advantages:
the upper self-sealing assembly of the device adopts the rubber cylinder to seal in a bulging way, the sealing position of the sealing mode does not need to be fixed, and a longer or shorter pump body can be replaced according to the oil extraction requirement after the rod pump is overhauled; the structure of upper and lower fixed seal is adopted, the sealing performance of the device is improved, the oil well pump is safer and more reliable, the stress condition of the pump cylinder is improved, and the pump cylinder cannot extend under the action of a liquid column, so that the device can be used in a deep well to achieve the purpose of deep well oil pumping; the device has the advantages of simple structure, strong practicability and lower processing cost.
Drawings
FIG. 1 is a schematic view of the downhole configuration of the present invention;
FIG. 2 is a schematic structural view of the sealing state of the present invention;
FIG. 3 is a schematic diagram of the pumping state of the present invention;
FIG. 4 is a schematic view of the upper self-sealing assembly.
In the figure: 1. pump base, 2, pump barrel, 3, valve rod connector, 4, valve rod, 5, plunger, 6, rubber cylinder, 601, external conical surface, 602, groove, 7, self-locking piece, 8, mandrel, 9, supporting seat, 901, annular groove, 902, internal frustum, 903, internal conical surface, 10, locking ring, 11, blocking cap, 1101, boss.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
Example one
Referring to fig. 1, a self sealss rod-type oil-well pump, including the pump mount 1 and the pump body, the pump body includes pump barrel 2 and plunger assembly, the plunger assembly includes upper and lower fixed connection's valve rod joint 3, valve rod 4 and plunger 5, the plunger assembly slides from top to bottom and sets up in pump barrel 2, pump barrel 2 can dismantle sealed cartridge in pump mount 1 through the locking joint that the lower extreme was equipped with, 2 upper ends of pump barrel are connected with the upper portion self sealss assembly that is used for sealed pump barrel 2 and oil pipe annular space, upper portion self sealss assembly includes rubber tube 6 and is used for locking 6 at the auto-lock piece 7 of inflation state with rubber tube, 6 suits of rubber tube are on auto- lock piece 7, 7 suits of auto-lock piece are in the outside of valve rod 4, valve rod joint 3 is located rubber tube 6 top, plunger 5 slides from top to bottom and sets up in pump barrel 2 of rubber tube 6 below.
In more detail, referring to fig. 4, the self-locking member 7 includes a mandrel 8 and a supporting seat 9, the supporting seat 9 is fixedly installed at the upper end of the pump barrel 2, the lower part of the mandrel 8 is slidably disposed in the supporting seat 9, and a locking ring 10 is fixedly sleeved on the mandrel 8; the locking ring 10 is an elastic supporting piece, the inner wall of the supporting seat 9 is provided with an annular groove 901 matched with the locking ring 10, and the upper end of the annular groove 901 is provided with an inner cone platform 902 convenient for unlocking the locking ring 10; the rubber cylinder 6 is sleeved on the upper part of the mandrel 8, and the outer diameter of the rubber cylinder is larger than the inner diameter of the supporting seat 9; a blocking cap 11 for extruding the rubber tube 6 is arranged on the outer wall of the mandrel 8 on the upper side of the rubber tube 6, and when the locking ring 10 is positioned in the annular groove 901, the rubber tube 6 is sealed on an oil pipe in an expanding way;
the external diameter of the valve rod connector 3 is larger than the internal diameter of the mandrel 8, and the external diameter of the plunger 5 is larger than the internal diameter of the mandrel 8 and smaller than the internal diameter of the supporting seat 9.
Further, the lock ring 10 in the present embodiment is spring steel.
When in use, as shown in figures 1-3, the pump base 1 is connected on an oil pipe and is put into a preset position of an oil well along with the oil pipe, the pump body part is put in along with a sucker rod, and after the pump base 1 is reached, a locking joint at the lower end of the pump barrel 2 is inserted into the pump base 1 for sealing and locking under the action of the weight of the sucker rod; at this time, the device has finished the fixed sealing of the bottom; the sucker rod continues to go down, the valve rod joint 3 pushes the mandrel 8 of the upper self-sealing assembly downwards, the mandrel 8 drives the baffle cap 11 to extrude the rubber cylinder 6, so that the rubber cylinder is sealed on the inner wall of the oil pipe in an expanding way, and meanwhile, the locking ring 10 at the lower part of the mandrel 8 enters the annular groove 901 to lock the rubber cylinder 6 in an expanding state; at the moment, the device realizes the top automatic sealing, and the oil can be normally pumped by lifting the anti-impact distance.
When the oil well pump needs to be replaced, the oil pumping rod is lifted, when the plunger 5 at the lower part of the valve rod 4 reaches the upper self-sealing assembly, the mandrel 8 is pushed upwards, the mandrel 8 drives the locking ring 10 to exit the annular groove 901, and the fixed locking of the expansion deformation of the rubber cylinder 6 is released; and the pumping rod is lifted up continuously, the rubber cylinder 6 can shrink and recover to deform after losing locking, and when the outer diameter of the rubber cylinder 6 is smaller than the inner diameter of the oil pipe, the whole pump body can be lifted up by lifting up the pumping rod.
The upper self-sealing assembly of the device adopts a rubber cylinder 6 to be sealed in a bulging way, the sealing position of the sealing mode does not need to be fixed, and a longer or shorter pump body can be replaced according to the oil extraction requirement after the rod pump is overhauled; the structure of upper and lower fixed seal is adopted, the sealing performance of the device is improved, the oil well pump is safer and more reliable, the stress condition of the pump barrel 2 is improved, and the pump barrel 2 cannot extend under the action of a liquid column, so that the device can be used in a deep well to achieve the purpose of deep well oil pumping; the device has the advantages of simple structure, strong practicability and lower processing cost.
Example two
As a preferred embodiment of the present invention, the present embodiment optimizes the structure of the upper self-sealing assembly based on the first embodiment, specifically:
referring to fig. 4, an outer conical surface 601 is arranged at the outer edge of the lower end of the rubber cylinder 6, and an inner conical surface 903 matched with the outer conical surface 601 is arranged at the inner edge of the upper end of the supporting seat 9; when the mandrel 8 drives the blocking cap 11 to extrude the rubber tube 6 downwards, the outer conical surface 601 at the lower end of the rubber tube 6 is clamped into the inner conical surface 903 at the upper end of the supporting seat 9, so that the lower end of the rubber tube 6 can be prevented from being tripped, and the setting obviously improves the success rate of expansion sealing of the rubber tube 6.
EXAMPLE III
As a preferred embodiment of the present invention, this embodiment further optimizes the structure of the upper self-sealing assembly on the basis of the second embodiment, specifically:
in this embodiment, the lower end of the blocking cap 11 is fixedly connected with the upper end of the rubber tube 6, a boss 1101 is arranged at the inner edge of the lower end of the blocking cap 11, and a groove 602 matched with the boss 1101 is arranged at the inner edge of the upper end of the rubber tube 6; when the mandrel 8 drives the blocking cap 11 to downwards extrude the rubber cylinder 6, the boss 1101 at the lower end of the blocking cap 11 is embedded into the groove 602 at the upper end of the rubber cylinder 6, and the expansion fastening force of the rubber cylinder 6 is increased by the arrangement, so that the sealing reliability of the upper self-sealing assembly is ensured.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (5)
1. The utility model provides a self sealss rod-type oil-well pump, includes the pump seat and the pump body, the pump body includes pump barrel and plunger assembly, the plunger assembly includes upper and lower fixed connection's valve rod joint, valve rod and plunger, the plunger assembly slides from top to bottom and sets up in the pump barrel, the pump barrel can dismantle sealed cartridge in the pump seat through the locking joint that the lower extreme was equipped with, its characterized in that: the utility model discloses a valve rod, including pump barrel, pump barrel upper end, upper portion self sealss assembly, valve rod joint, plunger, self-locking piece, valve rod joint, the plunger slides from top to bottom and sets up in the pump barrel of rubber barrel below.
2. The self-sealing rod-type oil well pump of claim 1, wherein: the self-locking piece comprises a mandrel and a supporting seat, the supporting seat is fixedly arranged at the upper end of the pump cylinder, the lower part of the mandrel is arranged in the supporting seat in a sliding mode, and a locking ring is fixedly sleeved on the mandrel; the locking ring is an elastic supporting piece, an annular groove matched with the locking ring is formed in the inner wall of the supporting seat, and an inner conical table convenient for unlocking the locking ring is arranged at the upper end of the annular groove; the rubber cylinder is sleeved on the upper part of the mandrel, and the outer diameter of the rubber cylinder is larger than the inner diameter of the supporting seat; a stop cap for extruding the rubber cylinder is arranged on the outer wall of the mandrel on the upper side of the rubber cylinder, and when the lock ring is positioned in the annular groove, the rubber cylinder is sealed on the oil pipe in an expanding way;
the outer diameter of the valve rod connector is larger than the inner diameter of the mandrel, and the outer diameter of the plunger is larger than the inner diameter of the mandrel and smaller than the inner diameter of the supporting seat.
3. The self-sealing rod-type oil well pump of claim 2, wherein: the outer edge of the lower end of the rubber cylinder is provided with an outer conical surface, and the inner edge of the upper end of the supporting seat is provided with an inner conical surface matched with the outer conical surface.
4. The self-sealing rod-type oil well pump of claim 2, wherein: the lock ring is made of spring steel.
5. The self-sealing rod-type oil well pump of claim 2, wherein: the lower end of the blocking cap is fixedly connected with the upper end of the rubber cylinder, a boss is arranged at the inner edge of the lower end of the blocking cap, and a groove matched with the boss is formed in the inner edge of the upper end of the rubber cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220136162.8U CN215890402U (en) | 2022-01-19 | 2022-01-19 | Self-sealing rod type oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220136162.8U CN215890402U (en) | 2022-01-19 | 2022-01-19 | Self-sealing rod type oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890402U true CN215890402U (en) | 2022-02-22 |
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ID=80251341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220136162.8U Active CN215890402U (en) | 2022-01-19 | 2022-01-19 | Self-sealing rod type oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890402U (en) |
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2022
- 2022-01-19 CN CN202220136162.8U patent/CN215890402U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Lv Fengmei Inventor after: Hu Chunqin Inventor after: Zhou Chuanhai Inventor after: Zhang Pengpeng Inventor before: Lv Fengmei Inventor before: Hu Chunqin Inventor before: Zhou Chuanhai Inventor before: Su Qingxin Inventor before: Zhao Haizhen Inventor before: Zhang Pengpeng |
|
| CB03 | Change of inventor or designer information |