Device for lifting fluid

Abstract

The utility model provides a device for lifting fluid, which comprises an upper cylinder, a lower cylinder and a liquid inlet component which are sequentially connected, the upper cylinder and the lower cylinder jointly form a channel for fluid movement, and the liquid inlet component is used for selectively communicating the channel with the outside. Wherein a pumping assembly is arranged in the channel, and the channel is divided into an upper cavity and a lower cavity by the pumping assembly. In addition, when the pumping assembly moves upwards, the fluid in the upper cavity can be driven to move upwards, and the liquid inlet assembly is allowed to be opened. When the pumping assembly moves downwards, fluid in the lower cavity can be driven to move upwards, and the liquid inlet assembly is allowed to be closed. According to the arrangement mode, the upward movement and the downward movement of the pump pressure assembly can play a role in lifting fluid. The technical problem that in the prior art, a thick oil pump is insufficient in deep pumping capacity is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil production equipment, and in particular relates to a device for lifting fluid. Background Art

[0002] In oil production operations, some oil has high viscosity and is located deep in the oil well. When this kind of oil is produced, it is difficult for the oil to enter the pump, the oil has great resistance to pass through the valve, and the valve group opens and closes lagging, which will lead to technical problems such as insufficient pump filling and low pump efficiency.

[0003] In the prior art, such oil is usually extracted using a thickening pump or a submersible electric pump. Among them, the thickening pump can overcome the downward viscous resistance caused by the thick oil, form a hydraulic feedback force, and help the sucker rod to go down, thereby extracting the oil. The submersible electric pump has the function of lifting fluid with high head and large displacement.

[0004] When using the above two equipments, although both can extract oil with high viscosity and deep position, the thickening pump has technical problems such as insufficient deep pumping capacity, serious rod breakage, and difficulty in lowering the sucker rod column. When using submersible electric pumps, due to the high viscosity of oil and the large pumping depth, there are technical problems such as low system efficiency and high failure rate. Utility Model Content

[0005] In order to overcome at least one or more of the above-mentioned defects in the prior art, the utility model provides a device for lifting fluid, comprising an upper cylinder, a lower cylinder and a liquid inlet assembly connected in sequence, wherein the upper cylinder and the lower cylinder together form a channel for fluid movement, and the liquid inlet assembly is used to connect the channel with the outside in a selectable manner.

[0006] A pump pressure assembly is arranged in the channel, and the pump pressure assembly includes an upper stroke mechanism, a connecting mechanism and a lower stroke mechanism connected in sequence. The connecting mechanism is sealed in the channel and is used to separate the channel into an upper chamber and a lower chamber for accommodating fluids respectively. The connecting mechanism is used to connect the upper chamber and the lower chamber in a selectable manner.

[0007] The upper stroke mechanism is configured to drive the connecting mechanism to move upward, actuate the fluid in the upper chamber to move upward, and allow the liquid inlet assembly to open, and the lower stroke mechanism is configured to drive the connecting mechanism to move downward, actuate the fluid in the lower chamber to move upward, and allow the liquid inlet assembly to close.

[0008] In one embodiment, the upper stroke mechanism includes a pull rod and a pull rod joint sleeved on the end of the pull rod for connecting to the connecting mechanism. The pull rod and the pull rod joint are both configured as hollow structures for jointly forming a passage for fluid movement. A fluid valve is arranged in the pull rod joint. The fluid valve is configured to allow the passage to open when the pull rod moves upward, and to allow the passage to close when the pull rod moves downward.

[0009] In one embodiment, the fluid valve includes a valve body and a valve core arranged in the valve body, a baffle and a fluid valve seat are respectively arranged on the inner wall of the valve body at the upper and lower positions of the valve core, a third through hole and a first through hole for fluid to pass through are respectively arranged on the baffle and the fluid valve seat, a second through hole for connecting the first through hole and the upper chamber is arranged on the side of the first through hole, the baffle and the fluid valve seat can jointly form a space for axial movement of the valve core, and the fluid valve is opened or closed by the axial movement of the valve core.

[0010] In one embodiment, at least one liquid inlet for connecting the outside with the upper chamber is provided on the side wall of the upper cylinder, a first limiting portion is provided along the inner wall of the upper cylinder below the liquid inlet, and a sealing portion is also provided on the pull rod, which can be selectively sealed with the first limiting portion, for selectively isolating the liquid inlet from the upper chamber.

[0011] In one embodiment, the downstroke mechanism includes a fluid flow valve connected to the connecting mechanism, wherein the fluid flow valve is configured to selectively connect the lower chamber to the interior of the connecting mechanism.

[0012] In one embodiment, the liquid flow valve includes a valve housing sleeved in a connecting mechanism, and a sealing core arranged in the valve housing, and a limit plate and a liquid flow valve seat are respectively arranged on the inner wall of the valve housing at the upper and lower positions of the sealing core, and a fifth through hole and a fourth through hole for fluid to pass are respectively arranged on the limit plate and the liquid flow valve seat, and the limit plate and the liquid flow valve seat together form a space for axial movement of the sealing core, and the liquid flow valve is opened or closed by the axial movement of the sealing core.

[0013] In one embodiment, the liquid inlet component includes an upper shell and a lower shell connected to the upper shell, and a liquid inlet platform is circumferentially sealed in the lower shell, and at least one liquid inlet hole penetrating along the axial direction of the liquid inlet platform is opened on the liquid inlet platform, and a groove is formed on the upper surface of the liquid inlet platform along the path formed by the liquid inlet hole, and a valve ring is arranged in the groove, and a limit platform for limiting the upward movement of the valve ring is arranged in the upper shell, and the limit platform and the groove together constitute a space for axial movement of the valve ring, and the liquid inlet component is opened or closed by the axial movement of the valve ring.

[0014] In one embodiment, a center hole is provided on the liquid inlet platform and extends along the axial direction of the liquid inlet platform. The lower stroke mechanism also includes a plunger arranged at the free end of the liquid flow valve and extending downward. The plunger seals through the center hole and extends to the outside, and can move axially along the center hole.

[0015] In one embodiment, the lower stroke mechanism further comprises a hollow connector for connecting the plunger and the liquid flow valve into one body, and at least one liquid flow hole for connecting the lower chamber with the interior of the connector is provided on the side wall of the connector.

[0016] In one embodiment, a stabilizing portion is provided on the inner wall of the upper cylinder, the stabilizing portion is in sealing contact with the pull rod and allows the pull rod to pass through the stabilizing portion and move axially.

[0017] In general, compared with the prior art, the above technical solution conceived by the utility model can achieve at least the following beneficial effects:

[0018] 1. In the utility model, an upper cylinder and a lower cylinder are arranged in sequence, so that the upper cylinder and the lower cylinder can form a channel for fluid movement together, and a liquid inlet assembly is arranged at the free end of the lower cylinder, so that the liquid inlet assembly can connect the channel with the outside in an optional manner, so that the fluid can enter the channel along the liquid inlet assembly. At the same time, a pump pressure assembly for lifting the fluid is arranged in the channel, and the pump pressure assembly forms an upper chamber and a lower chamber. In addition, when the pump pressure assembly moves upward, it can actuate the fluid in the upper chamber to move upward and be discharged, and when the pump pressure assembly moves downward, it can actuate the fluid in the lower chamber to move upward. Under this arrangement, the upward movement and downward movement of the pump pressure assembly can both play a role in lifting the fluid. The technical problem of insufficient deep pumping capacity of the thickening pump in the prior art is solved.

[0019] 2. In the utility model, an upper chamber and a lower chamber are provided, each of which can be used to contain fluid, so that when the lower stroke mechanism moves downward, the deadweight of the fluid in the upper chamber can exert a force on the lower stroke mechanism, thereby helping the lower stroke mechanism to move downward. In this way, the technical problem of the difficulty of the sucker rod column of the prior art pumping thickening pump to move downward is solved. In addition, the device is connected to each other through a mechanical structure, which solves the technical problems of low system efficiency and high failure rate of the prior art submersible electric pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure of the device for lifting fluid according to the utility model is schematically shown;

[0021] Figure 2The overall structure of the upper stroke mechanism of the device for lifting fluid according to the utility model is schematically shown;

[0022] Figure 3 The overall structure of the lower stroke mechanism of the device for lifting fluid according to the utility model is schematically shown;

[0023] Figure 4 The partial structure of the fluid valve according to the utility model is schematically shown;

[0024] Figure 5 The overall structure of the liquid inlet assembly of the device for lifting fluid according to the utility model is schematically shown;

[0025] Figure 6 The overall structure of the adjustment ring of the liquid inlet assembly according to the utility model is schematically shown.

[0026] It should be noted that the drawings are not necessarily drawn according to actual scale.

[0027] In all the drawings, the same reference numerals represent the same technical features, specifically: 100-device for lifting fluid; 1-upper cylinder; 11-liquid inlet; 12-first limiting portion; 13-second limiting portion; 14-stabilizing portion; 15-upper joint; 2-lower cylinder; 3-channel; 31-upper chamber; 32-lower chamber; 4-pumping assembly; 41-upper stroke mechanism; 411-pull rod; 412-pull rod joint; 413-passageway; 414-fluid valve; 4141-valve body; 4142-valve core; 4143-fluid valve seat; 4144-first through hole; 4145-second through hole; 4146- Baffle; 4147-third through hole; 4148-guide hole; 415-sealing part; 416-liquid outlet joint; 4161-liquid outlet hole; 4162-force head; 42-lower stroke mechanism; 421-liquid flow valve; 4211-valve shell; 4212-sealing core; 4213-liquid flow valve seat; 4214-limiting plate; 422-plunger; 423-connecting head; 4231-liquid flow hole; 43-connecting mechanism; 5-liquid inlet assembly; 51-upper shell; 511-limiting platform; 52-lower shell; 521-liquid inlet platform; 5211-center hole; 522-liquid inlet hole; 523-valve ring; 524-adjusting ring. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a device for lifting fluid of the present invention in conjunction with the accompanying drawings.

[0029] For convenience, the direction extending along the upper cylinder is called "axial direction", "vertical direction" or similar terms, the direction perpendicular to the "axial direction" is called "lateral direction", "horizontal direction" or similar terms, the direction of movement from the lower cylinder to the upper cylinder is called "upward" or similar terms, the direction of movement from the upper cylinder to the lower cylinder is called "downward" or similar terms, the direction close to the upper cylinder is called "above" or similar terms, and the direction close to the lower cylinder is called "below" or similar terms.

[0030] like Figure 1 As shown, an embodiment of the utility model provides a device 100 for lifting fluid, comprising an upper cylinder 1 and a lower cylinder 2 connected in sequence, wherein the upper cylinder 1 and the lower cylinder 2 are both configured as hollow structures, and are used to form a channel 3 for fluid movement. A pump pressure component 4 is provided in the channel 3 for providing pressure to the fluid in the channel 3.

[0031] At the same time, if Figure 1 As shown, the device 100 for lifting fluid also includes a liquid inlet component 5 arranged at the free end of the lower cylinder 2, and the liquid inlet component 5 is used to be connected to the outside in a selectable manner, so as to allow the external fluid to enter the channel 3 along the liquid inlet component 5 in a selectable manner.

[0032] In this arrangement, when in use, the upper cylinder 1 and the lower cylinder 2 are connected to each other so that they together form a channel 3 for fluid movement, and the pump pressure component 4 is arranged in the channel 3. At the same time, the liquid inlet component 5 is connected to the free end of the lower cylinder 2. Thus, the assembly of the device 100 for lifting fluid is completed. Then, the liquid inlet component 5 is opened so that the channel 3 is connected to the outside. In this process, the fluid in the outside will move from the liquid inlet component 5 to the channel 3. At this time, the fluid entering the channel 3 will be subjected to the pressure provided by the pump pressure component 4, so that the fluid continues to move upward until it is discharged from the free end of the upper cylinder 1. Thus, the fluid extraction work is completed.

[0033] In one embodiment, Figure 1 As shown, the pump assembly 4 includes an upper stroke mechanism 41, a lower stroke mechanism 42, and a connecting mechanism 43 for connecting the upper stroke mechanism 41 and the lower stroke mechanism 42 into one. The connecting mechanism 43 is arranged in the channel 3 in a circumferentially sealed manner and is configured to be able to move axially along the channel 3.

[0034] In this way, the connection mechanism 43 can separate the channel 3, thereby forming an upper chamber 31 for accommodating the upper stroke mechanism 41 and a lower chamber 32 for accommodating the lower stroke mechanism 42. At the same time, the connection mechanism 43 is set to a hollow structure. In this way, the upper chamber 31 and the lower chamber 32 can be connected to each other through the connection mechanism 43, so that the fluid between the upper chamber 31 and the lower chamber 32 can flow to each other.

[0035] In this embodiment, if Figure 1 As shown, the upper stroke mechanism 41 includes a tie rod 411, and a tie rod joint 412 is sleeved on the end of the tie rod 411. The tie rod 411 and the tie rod joint 412 are both configured as hollow structures, which are used to form a passage 413 for fluid movement for fluid to pass through. At the same time, a fluid valve 414 is provided in the tie rod head 412, and the fluid valve 414 is configured to allow the passage 413 to be opened when the upper stroke mechanism 41 moves upward, and to allow the passage 413 to be closed when the upper stroke mechanism 41 moves downward.

[0036] In one embodiment, Figure 2 As shown, the fluid valve 414 includes a valve body 4141 disposed in the tie rod joint 412, wherein the valve body 4141 is configured as a hollow structure, and a valve core 4142 is disposed in the hollow area, and the valve core 4142 is configured to be able to move axially along the hollow area.

[0037] Among them, Figure 2 As shown, a fluid valve seat 4143 is also provided in the valve body 4141. The fluid valve seat 4143 is provided along the inner wall of the valve body 4141 and is used to receive the valve core 4142, thereby limiting the downward movement of the valve core 4142 to prevent the valve core from continuously moving downward. In addition, a first through hole 4144 for fluid movement is formed on the fluid valve seat 4143. A second through hole 4145 penetrating the side wall of the valve body 4141 is provided on the side of the first through hole 4144. The second through hole 4145 is used to connect the first through hole 4144 with the upper chamber 31.

[0038] At the same time, if Figure 2As shown, the fluid valve 414 also includes a baffle 4146 disposed inside the valve body 4141 for preventing the valve core 4142 from continuously moving upwards, and at least one third through hole 4147 is disposed on the baffle 4146, and the third through hole 4147 is used to connect the passage 413 with the hollow area formed by the valve body 4141. In addition, the baffle 4146 can also be used to limit the upwardly moving valve core 4142 to prevent the valve core 4142 from continuously moving upwards. In this way, the valve seat 4143 of the fluid valve and the baffle 4146 together constitute a space for the axial movement of the valve core 4142, and the passage 413 is connected or disconnected through the axial movement of the valve core 4142.

[0039] In one embodiment, Figure 1 As shown, at least one liquid inlet 11 is also provided on the side wall of the upper cylinder 1. In this embodiment, the liquid inlet 11 is provided in a plurality and arranged around the upper cylinder 1. The liquid inlet 11 passes through the side wall of the upper cylinder 1 and is used to communicate with the upper chamber 31. In this way, the external fluid can move along the liquid inlet 11 into the upper chamber 31 and fill the upper chamber 31. In this process, the fluid will move along the second through hole 4145 into the first through hole 4144 and contact the valve core 4142.

[0040] In one embodiment, Figure 1 As shown, a blocking portion 415 is provided on the pull rod 411 and around the pull rod 411. At the same time, a first limiting portion 12 is also provided below the liquid inlet 11 along the inner wall of the upper cylinder 1, and the blocking portion 415 is located below the first limiting portion 12. The first limiting portion 12 and the blocking portion 415 can form a sealed fit in an optional manner, thereby blocking the liquid inlet 11, so that the liquid inlet 11 is separated from the upper chamber 31.

[0041] In this way, when the blocking portion 415 moves upward, it can abut against the first limiting portion 12 to form a sealed fit. In this process, as the blocking portion 415 moves upward, the volume of the upper chamber 31 will gradually decrease, so that the pressure in the upper chamber 31 will gradually increase.

[0042] According to a preferred embodiment of the present invention, Figure 1 As shown, a second limiting portion 13 is formed on the inner wall of the upper cylinder 1 along the inner wall of the upper cylinder 1, and the second limiting portion 13 is configured to receive the blocking portion 415 and limit the downward movement of the blocking portion 415, so that the blocking portion 415 cannot continue to move downward. In this way, the first limiting portion 12 and the second limiting portion 13 can jointly form an area for the axial movement of the blocking portion 415.

[0043] In this arrangement, when it is necessary to extract fluid, first, a downward force is applied to the pull rod 411 to make the pull rod 411 move downward. At this time, the pull rod 411 will drive the blocking portion 415 to move downward together until the blocking portion 415 and the second limiting portion 13 abut against each other. At this time, the blocking portion 415 will gradually move away from the first limiting portion 12. In this way, the liquid inlet 11 and the upper chamber 31 can be connected to each other. In this process, the fluid in the outside will enter the upper chamber 31 along the liquid inlet 11 and fill the upper chamber 31. At the same time, the fluid filled in the upper chamber 31 will move along the second through hole 4145 into the first through hole 4144 and contact the valve core 4142.

[0044] Then, an upward force is applied to the pull rod 411, so that the pull rod 411 moves upward. At this time, the pull rod 411 will drive the blocking portion 415 to move upward together, so that the blocking portion 415 gradually approaches the first limit portion 12, until it is in contact with the first limit portion 12 to form a sealed connection. In this process, the volume of the upper chamber 31 will gradually decrease, so that the pressure in the upper chamber 31 will gradually increase.

[0045] In this way, the upward force exerted by the fluid in the upper chamber 31 on the valve core 4142 gradually increases until the valve core 4142 is separated from the fluid valve seat 4143 and moves upward. As a result, the first through hole 4144 and the passage 413 can be interconnected through the third through hole 4147, and the fluid can continue to move upward along the second through hole 4145, the first through hole 4144, the third through hole 4147 and the passage 413 from the upper chamber 31 until it is output from the free end of the pull rod 411. In this way, the extraction of the fluid is completed. It should be noted that the above process is a one-time work of extracting the fluid. During the production process, the pull rod 411 can continuously move up and down to complete the continuous extraction of the fluid.

[0046] In one embodiment, Figure 1 As shown, the lower stroke mechanism 42 includes a liquid flow valve 421 connected to the hollow connecting mechanism 43, and the liquid flow valve 421 is configured to selectively connect the lower chamber 32 to the upper chamber 31 through the hollow connecting mechanism 43.

[0047] Among them, Figure 3As shown, the liquid flow valve 421 includes a hollow valve housing 4211 connected to the connecting mechanism 43, and a sealing core 4212 disposed in the valve housing 4211, wherein the sealing core 4212 is configured to be able to move axially along the hollow area. A liquid flow valve seat 4213 is disposed below the sealing core 4212 along the inner wall of the valve housing 4211, and a fourth through hole (not shown in the figure) for fluid to pass through is formed on the liquid flow valve seat 4213. In this way, the liquid flow valve seat 4213 can be used to receive the sealing core 4212, and the fourth through hole is sealed by the sealing core 4212, thereby blocking the passage between the lower chamber 31 and the connecting mechanism 43.

[0048] At the same time, if Figure 3 As shown, in the valve housing 4211, a limit plate 4214 is also provided above the sealing core 4212 along the inner wall of the valve housing 4211, and the limit plate 4214 is used to limit the sealing core 4212 moving upward to prevent the sealing core 4212 from continuously moving upward. Among them, a fifth through hole (not shown in the figure) is formed on the limit plate 4214, and the fifth through hole is used to connect the lower chamber 32 with the interior of the connecting mechanism 43. Under this arrangement, a space for the axial movement of the sealing core 4212 can be formed between the valve seat 4213 of the liquid flow valve and the limit plate 4214. In addition, the connection or disconnection between the lower chamber 32 and the connecting mechanism 43 can be achieved through the axial movement of the sealing core 4212.

[0049] In this way, when the sealing core 4212 and the valve seat 4213 of the liquid flow valve abut against each other, the sealing core 4212 will be sealed and connected to the fourth through hole, thereby blocking the passage between the lower chamber 31 and the connecting mechanism 43. When the sealing core 4212 and the limiting plate 4214 abut against each other, the sealing core 4212 will be away from the fourth through hole, so that the lower chamber 32, the fourth through hole, the fifth through hole, and the hollow connecting mechanism 43 are interconnected, thereby forming a path for fluid movement, so that the fluid can move along the path.

[0050] In one embodiment, Figure 1 As shown, a liquid inlet assembly 5 is provided at the free end of the lower cylinder 2, and the liquid inlet assembly 5 is used to connect the lower chamber 32 with the outside in a selectable manner, so as to allow the external fluid to enter the lower chamber 32 along the liquid inlet assembly 5 in a selectable manner.

[0051] Among them, Figure 5As shown, the liquid inlet assembly 5 includes an upper shell 51 and a lower shell 52 connected to the upper shell 51. The upper shell 51 and the lower shell 52 are both configured as hollow structures. A liquid inlet platform 521 is provided inside the lower shell 52 along the inner wall of the lower shell 52, and at least one liquid inlet hole 522 is provided on the liquid inlet platform 521 along the axial direction of the liquid inlet platform 521, and the liquid inlet hole 522 is used to selectively connect the outside with the lower chamber 32. In this embodiment, the liquid inlet holes 522 are provided in a plurality and are arranged circumferentially along the upper surface of the liquid inlet platform 521.

[0052] In one embodiment, Figure 5 As shown, a groove (not shown) is formed on the upper surface of the liquid inlet platform 521 along the path formed by the liquid inlet holes 522, and a valve ring 523 is arranged in the groove along the path formed by the groove. The valve ring 523 is arranged to be able to move along the axial direction in the lower shell 52, so as to contact with the plurality of liquid inlet holes 522 synchronously in a selective manner. In this arrangement, the plurality of liquid inlet holes 522 can be opened or closed synchronously by the valve ring 523.

[0053] At the same time, if Figure 5 As shown, a limiting platform 511 is provided in the upper shell 51, and the limiting platform 511 is provided in a structure capable of abutting against the valve ring 523, thereby limiting the upward movement of the valve ring 523 and preventing the valve ring 523 from continuously moving upward. At the same time, the limiting platform 511 is provided along the inner wall of the upper shell 51 and forms a hollow flow channel, which is used to communicate with the lower chamber 32.

[0054] In this setting, if Figure 1 As shown, the limiting platform 511 and the groove (not shown in the figure) form a region for the movement of the valve ring 523, and when the valve ring 523 is located in the groove, the liquid inlet hole 522 can be blocked, so that the outside world and the lower chamber 32 are disconnected from each other. When the valve ring 523 moves upward and abuts against the limiting platform 511, the lower chamber 32 and the liquid inlet hole 522 can be connected to each other, so that the lower chamber 32, the liquid inlet hole 522, and the outside world can be connected to each other. As a result, the external fluid can enter the lower chamber 32 along the hollow lower shell 52 and the liquid inlet hole 522, and fill the lower chamber 32.

[0055] According to a preferred embodiment of the present utility model, Figure 5 As shown, an adjusting ring 524 that matches the groove is arranged in the groove, and the adjusting ring 524 is arranged along the groove to accommodate the valve ring 523. Figure 6As shown, a fluid hole corresponding to the liquid inlet hole 522 is formed on the adjustment ring 524 .

[0056] The end of the adjusting ring 524 is configured to be a trapezoidal structure with a diameter that gradually decreases from top to bottom. Specifically, the end of the adjusting ring 524 forms an inverted truncated cone. In this way, when the valve ring 523 moves downward, the truncated cone can play a guiding role. As a result, the valve ring 523 can accurately move into the adjusting ring 524 and block the liquid inlet hole 522.

[0057] According to a preferred embodiment of the present utility model, Figure 5 As shown, the end of the limiting platform 511 is configured to be an inwardly concave structure, and the concave portion can be used to accommodate the valve ring 523. In this way, the limiting platform 511 can stably limit the valve ring 523.

[0058] In one embodiment, Figure 4 As shown, a guide hole 4148 is also provided on the fluid valve 414, which is connected along the axial direction and is used to connect the upper chamber 31 with the interior of the connecting mechanism 43. In this arrangement, when the lower stroke mechanism 42 moves downward, as the volume of the lower chamber 32 gradually decreases, the pressure gradually increases, and the fluid in the lower chamber 32 can be continuously transported to the upper chamber 31 along the guide hole 4148. In this way, the upward movement and downward movement of the pump pressure component 4 can both play a role in lifting the fluid. The technical problem of insufficient deep pumping capacity of the thickening pump in the prior art is solved.

[0059] In this arrangement, when in use, first, the upper cylinder 1 and the lower cylinder 2 are connected to each other, so that the upper cylinder 1 and the lower cylinder 2 form a channel 3 for fluid movement, and the pump pressure component 4 is arranged in the channel 3. At the same time, the liquid inlet component 5 is connected to the free end of the lower cylinder 2. Thus, the assembly work of the device 100 for lifting fluid is completed. After the assembly is completed, the device 100 for lifting fluid is arranged in the well, so that the fluid contacts the device 100 for lifting fluid.

[0060] Secondly, an upward force is applied to the pull rod 411, so that the pull rod 411 moves upward. At this time, the pull rod 411 will drive the lower stroke assembly 42 to move upward together. During the upward movement of the lower stroke assembly 42, the volume of the lower chamber 32 will gradually increase, and the pressure in the lower chamber 32 will gradually decrease.

[0061] At this time, the sealing core 4212 of the liquid flow valve 421 in the lower chamber 3 will abut against the valve seat 4213 of the liquid flow valve, so that the liquid flow valve 421 is in a closed state. At the same time, the valve ring 523 in the liquid inlet assembly 5 will be separated from the groove (not shown in the figure) and continue to move upward until it abuts against the limit platform 511. In this process, a mutually conductive structure will be formed between the lower chamber 32, the liquid inlet hole 522, and the outside world, so that the external fluid can move along the hollow lower shell 52 and the liquid inlet hole 522 into the lower chamber 32 and fill the lower chamber 32.

[0062] In addition, as the pull rod moves upward, the volume of the upper chamber 31 will gradually decrease, and the upward force exerted by the fluid in the upper chamber 31 on the valve core 4142 will gradually increase, until the valve core 4142 is separated from the fluid valve seat 4143 and moves upward. As a result, the first through hole 4144 and the passage 413 can be connected to each other through the third through hole 4147, and the fluid can continue to move upward from the upper chamber 31 along the second through hole 4145, the first through hole 4144, the third through hole 4147 and the passage 413 until it is output from the free end of the pull rod 411.

[0063] Once again, a downward force is applied to the pull rod 411, so that the pull rod 411 moves downward. At this time, the pull rod 411 will drive the blocking portion 415 to move downward together, so that the blocking portion 415 is away from the first limiting portion 12. In this way, the liquid inlet 11 and the upper chamber 31 can be connected to each other. In this process, the fluid in the outside will enter the upper chamber 31 along the liquid inlet 11 and fill the upper chamber 31. At the same time, the fluid filled in the upper chamber 31 will move along the second through hole 4145 into the first through hole 4144, and contact the valve core 4142.

[0064] At this time, the lower stroke mechanism 42 will also continue to move downward, and as the fluid in the upper chamber 31 increases, the gravity of the fluid will exert a downward force on the lower stroke mechanism 42, thereby helping the lower stroke mechanism 42 to move downward. At the same time, as the lower stroke mechanism 42 continues to move downward, the volume of the lower chamber 32 will gradually decrease, so that the pressure in the lower chamber 32 gradually increases and gradually exceeds the external pressure.

[0065] During this process, the valve ring 523 in the liquid inlet assembly 5 will continue to move downward until it fits into the groove (not shown in the figure), thereby blocking the liquid inlet hole 522, thereby disconnecting the outside world from the lower chamber 32.

[0066] In addition, the sealing core 4212 of the liquid flow valve 421 located in the lower chamber 3 will continue to move upward. In this way, the sealing core 4212 will abut against the limit plate 4214, so that the liquid flow valve 421 is in an open state. Specifically, the lower chamber 32, the fourth through hole, the fifth through hole, and the hollow connecting mechanism 43 are interconnected to form a path for fluid movement. And as the pressure in the lower chamber 32 continues to increase, the fluid will continue to move upward along the path until it moves into the upper chamber 31 through the guide hole 4148. In this setting, the upward movement and downward movement of the pump pressure component 4 can both play a role in lifting the fluid. The technical problem of insufficient deep extraction capacity of the thickening pump in the prior art is solved. It should be noted that the above process is a one-time work of extracting the fluid. During the production process, the pull rod 411 can continuously move up and down to complete the continuous extraction of the fluid.

[0067] In one embodiment, Figure 1 As shown, the lower stroke mechanism 42 further includes a plunger 422 connected to the liquid flow valve 421, and the plunger 422 is arranged at the free end of the liquid flow valve 421 and extends downward. Figure 5 As shown, a central hole 5211 for the plunger 422 to pass through is formed on the liquid inlet platform 521. In this embodiment, the central hole 5211 is arranged in the middle of the liquid inlet platform 521 and is formed through along the axial direction.

[0068] In this arrangement, the plunger 422 can pass through the center hole 5211 and extend to the outside of the center hole 5211. The plunger 422 and the center hole 5211 are sealed together, and the plunger 422 can move axially along the center hole 5211. In this arrangement, when the pull rod 411 moves up and down, it can drive the plunger 422 to move up and down synchronously. In this process, the plunger 422 will reciprocate up and down in the fluid. In this way, the surface tension of the fluid can be destroyed, making it easier for the fluid to enter the lower chamber 32 along the lower shell 52. In addition, it is also possible to extract high-viscosity fluids. In this way, the technical problem of the difficulty of the sucker rod column of the thickening pump to go down in the prior art is solved.

[0069] At the same time, the plunger 422 passes through the liquid inlet platform 521, and the plunger 422 is sealedly connected to the liquid inlet platform 521. In this way, the liquid inlet platform 521 can exert an inward force on the plunger 422 along the circumferential direction, thereby supporting the plunger 422. As a result, the plunger 422 can be stably arranged in the lower cylinder 2 to prevent the plunger 422 from breaking.

[0070] According to a preferred embodiment of the present utility model, Figure 1 As shown, the free end of the plunger 422 is configured to be a conical structure, and the diameter of the cone decreases from top to bottom. Specifically, the free end of the plunger 422 is configured to be pointed downward. In this configuration, when the plunger 422 contacts the fluid, the pressure exerted on the fluid can be increased, thereby more easily destroying the surface tension of the liquid. Preferably, the plunger 422 is configured to be a solid structure. In this way, the deadweight of the plunger 422 can be increased, thereby facilitating the downward movement of the plunger 422. As a result, the technical problem of the difficulty in descending the sucker rod column of the thickening pump in the prior art is further solved.

[0071] In one embodiment, Figure 1 As shown, the lower stroke mechanism 42 further includes a connector 423 disposed between the liquid flow valve 421 and the plunger 422, and the connector 423 is used to connect the liquid flow valve 421 and the plunger 422 into one body. Figure 3 As shown, the connector 423 is configured as a hollow structure. At the same time, at least one liquid flow hole 4231 penetrating the connector 423 is formed on the side wall of the connector 423, and the liquid flow hole 4231 is used to communicate with the lower chamber 32. In this way, the fluid in the lower chamber 32 can move along the liquid flow hole 4231 into the liquid flow valve 421.

[0072] According to a preferred embodiment of the present utility model, Figure 3 As shown, the liquid flow holes 4231 are arranged in a plurality and distributed circumferentially along the side wall of the connector 423. At the same time, the liquid flow holes 4231 are configured to be inclined downward. In this way, the resistance of the fluid entering the liquid flow holes 4231 can be reduced, thereby facilitating the flow of the fluid.

[0073] According to a preferred embodiment of the present utility model, Figure 1 As shown, a stabilizing portion 14 is provided on the inner wall of the upper cylinder 1, and the stabilizing portion 14 is provided along the inner wall of the upper cylinder 1 and is located above the liquid inlet hole 11. At the same time, the stabilizing portion 14 is configured to be in sealed contact with the tie rod 411, and enables the tie rod 411 to move along the axis of the stabilizing portion 14. In this way, the stabilizing portion 14 can exert an inward force on the tie rod 411 along the circumferential direction, thereby supporting the tie rod 411. As a result, the tie rod 411 can be stably arranged in the upper cylinder 1 to prevent the tie rod 411 from breaking.

[0074] In one embodiment, Figure 1As shown, a liquid outlet connector 416 is sleeved on the free end of the pull rod 411, and the liquid outlet connector 416 is configured as a hollow structure for communicating with the pull rod 411. In addition, at least one liquid outlet hole 4161 penetrating the side wall of the liquid outlet connector 416 is formed on the side wall of the liquid outlet connector 416.

[0075] In this way, the fluid in the pull rod 411 can move along the liquid outlet joint 416 and be discharged from the liquid outlet hole 4161. In this embodiment, the liquid outlet holes 4161 are arranged in a plurality and are distributed circumferentially along the side wall of the liquid outlet joint 416. At the same time, the liquid outlet holes 4161 are configured to be inclined upward. In this way, the fluid entering the liquid outlet hole 4161 can be guided, thereby facilitating the fluid to flow out.

[0076] According to a preferred embodiment of the present utility model, Figure 1 As shown, a force-bearing head 4162 is further provided at the free end of the liquid outlet joint 416, and the force-bearing head 4162 is used to be connected to a reciprocating motion device in an optional manner, and the reciprocating motion device is used to continuously apply a reciprocating force to the pumping mechanism 4, so that the pumping mechanism 4 can continuously move up and down. In this way, the force-bearing head 4162 can provide a force fulcrum, which is convenient for applying the force.

[0077] In one embodiment, Figure 1 As shown, an upper joint 15 is sleeved on the free end of the upper cylinder 1, and the upper joint 15 is set to a hollow structure, which is used to form a cavity for receiving fluid between the upper joint 15 and the liquid outlet joint 416. In this arrangement, when the fluid drips from the liquid outlet hole 4161, it can be received by the cavity. In this arrangement, the stabilizing portion 14 and the upper joint 15 can be sealed by the fluid, thereby increasing air tightness.

[0078] According to a preferred embodiment of the present utility model, the upper joint 15, the upper cylinder 1, the lower cylinder 2 and the liquid inlet assembly 5 are all connected by threads.

[0079] The operation of the device 100 for lifting a fluid according to the present invention is as follows.

[0080] First, assemble the components of the device 100 for lifting fluid together, and connect the force head 4162 to the reciprocating device. At the same time, put the assembled device 100 for lifting fluid into the well so that the fluid in the well can contact the device 100 for lifting fluid. In this process, the blocking portion 415 will abut against the second limiting portion 13, so that the liquid inlet 11 and the upper chamber 31 are connected to each other. As a result, the external fluid can enter the upper chamber 31 along the liquid inlet 11 and be blocked by the fluid valve 414.

[0081] Secondly, an upward force is applied to the pull rod 411, so that the pull rod 411 moves upward. At this time, the pull rod 411 will drive the blocking portion 415 to move upward together, so that the blocking portion 415 gradually approaches the first limit portion 12, until it is in contact with the first limit portion 12 to form a sealed connection. In this process, the volume of the upper chamber 31 will gradually decrease, so that the pressure in the upper chamber 31 will gradually increase.

[0082] In this way, the upward force exerted by the fluid in the upper chamber 31 on the valve core 4142 gradually increases until the valve core 4142 is separated from the fluid valve seat 4143. As a result, the fluid valve 414 can be in an open state. In this process, the fluid can enter the fluid valve 414 and move upward until it is output from the free end of the pull rod 411.

[0083] When the pull rod 411 moves upward, the pull rod 411 drives the lower stroke assembly 42 to move upward together, so that the volume of the lower chamber 32 gradually increases and the pressure in the lower chamber 32 gradually decreases.

[0084] At this time, the liquid flow valve 421 in the lower chamber 3 is in a closed state, but the liquid inlet assembly 5 is in an open state. In this process, the lower chamber 32 and the outside are connected to each other through the liquid inlet assembly 5, so that the fluid from the outside can move into the lower chamber 32 and fill the lower chamber 32.

[0085] Then, a downward force is applied to the pull rod 411, so that the pull rod 411 moves downward. At this time, the pull rod 411 will drive the blocking portion 415 to move downward together, so that the blocking portion 415 is away from the first limiting portion 12. In this way, the liquid inlet 11 and the upper chamber 31 can be connected to each other. In this process, the fluid in the outside will enter the upper chamber 31 along the liquid inlet 11 and fill the upper chamber 31. At the same time, the fluid filled in the upper chamber 31 will be blocked by the fluid valve 414.

[0086] During this process, the lower stroke mechanism 42 will also continue to move downward. As the lower stroke mechanism 42 continues to move downward, the volume of the lower chamber 32 will gradually decrease, so that the pressure in the lower chamber 32 gradually increases and gradually exceeds the external pressure. At this time, the liquid inlet component 5 will be in a closed state, but the liquid flow valve 421 will be in an open state. Under this setting, the fluid in the lower chamber 32 will enter from the liquid flow valve 421, and as the pressure in the lower chamber 32 continues to increase, the fluid will continue to move upward along the path. It should be noted that the above process is a one-time work of extracting fluid. In the production process, the reciprocating motion device can continuously apply a reciprocating force to the force-bearing head 4162 to complete the continuous extraction of the fluid.

[0087] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A device for lifting a fluid, characterized in that: The invention comprises an upper cylinder (1), a lower cylinder (2) and a liquid inlet assembly (5) which are connected in sequence, wherein the upper cylinder (1) and the lower cylinder (2) together form a channel (3) for fluid movement, and the liquid inlet assembly (5) is used to connect the channel (3) with the outside in a selectable manner. A pump assembly (4) is arranged in the channel (3), the pump assembly (4) comprising an upper stroke mechanism (41), a connecting mechanism (43) and a lower stroke mechanism (42) which are connected in sequence, the connecting mechanism (43) being sealedly arranged in the channel (3) and used to separate the channel (3) into an upper chamber (31) and a lower chamber (32) for respectively accommodating a fluid, the connecting mechanism (43) being used to selectively connect the upper chamber (31) and the lower chamber (32), The upper stroke mechanism (41) is configured to be able to drive the connecting mechanism (43) to move upward, and to actuate the fluid in the upper chamber (31) to move upward, and to allow the liquid inlet assembly (5) to open; the lower stroke mechanism (42) is configured to be able to drive the connecting mechanism (43) to move downward, and to actuate the fluid in the lower chamber (32) to move upward, and to allow the liquid inlet assembly (5) to close.

2. The device for lifting fluid according to claim 1, characterized in that The upper stroke mechanism (41) comprises a pull rod (411) and a pull rod joint (412) sleeved on the end of the pull rod (411) for connecting to a connecting mechanism (43); the pull rod (411) and the pull rod joint (412) are both configured as hollow structures for jointly forming a passage (413) for fluid movement; a fluid valve (414) is provided in the pull rod joint (412); the fluid valve (414) is configured to allow the passage (413) to open when the pull rod (411) moves upward, and to allow the passage (413) to close when the pull rod (411) moves downward.

3. The device for lifting fluid according to claim 2, characterized in that: The fluid valve (414) comprises a valve body (4141) and a valve core (4142) arranged in the valve body (4141); a baffle plate (4146) and a fluid valve seat (4143) are respectively arranged on the inner wall of the valve body (4141) at upper and lower positions of the valve core (4142); a third through hole (4147) and a first through hole (4144) for fluid to pass through are respectively arranged on the baffle plate (4146) and the fluid valve seat (4143); a second through hole (4145) for connecting the first through hole (4144) with an upper chamber (31) is arranged on the side of the first through hole (4144); the baffle plate (4146) and the fluid valve seat (4143) can jointly form a space for axial movement of the valve core (4142), and the fluid valve (4144) is opened or closed by the axial movement of the valve core (4142).

4. The device for lifting fluid according to claim 3, characterized in that: At least one liquid inlet (11) for connecting the outside with the upper chamber (31) is provided on the side wall of the upper cylinder (1), a first limiting portion (12) is provided below the liquid inlet (11) along the inner wall of the upper cylinder (1), and a blocking portion (415) is also provided on the pull rod (411) for selectively sealingly cooperating with the first limiting portion (12) for selectively isolating the liquid inlet (11) from the upper chamber (31).

5. The device for lifting a fluid according to any one of claims 1 to 4, characterized in that: The fluid valve (414) is also provided with a guide hole (4148) for connecting the upper chamber (31) with the interior of the connecting mechanism (43). The lower stroke mechanism (42) includes a liquid flow valve (421) connected to the connecting mechanism (43). The liquid flow valve (421) is configured to connect the lower chamber (32) with the interior of the connecting mechanism (43) in a selective manner, and is used to form a path for fluid movement together with the guide hole (4148).

6. The device for lifting fluid according to claim 5, characterized in that The liquid flow valve (421) comprises a valve housing (4211) sleeved in a connecting mechanism (43), and a sealing core (4212) arranged in the valve housing (4211); a limit plate (4214) and a liquid flow valve seat (4213) are respectively arranged on the inner wall of the valve housing (4211) at upper and lower positions of the sealing core (4212); a fifth through hole and a fourth through hole for fluid to pass through are respectively arranged on the limit plate (4214) and the liquid flow valve seat (4213); the limit plate (4214) and the liquid flow valve seat (4213) jointly form a space for axial movement of the sealing core (4212); and the liquid flow valve (4211) is opened or closed by the axial movement of the sealing core (4212).

7. The device for lifting fluid according to claim 5, characterized in that The liquid inlet assembly (5) comprises an upper shell (51) and a lower shell (52) connected to the upper shell (51); a liquid inlet platform (521) is circumferentially sealed inside the lower shell (52); the liquid inlet platform (521) is provided with at least one liquid inlet hole (522) penetrating along the axial direction of the liquid inlet platform (521); a groove is formed on the upper surface of the liquid inlet platform (521) along the path formed by the liquid inlet hole (522); a valve ring (523) is arranged in the groove; a limit platform (511) for limiting the upward movement of the valve ring (523) is arranged in the upper shell (51); the limit platform (511) and the groove together constitute a space for the axial movement of the valve ring (523); and the liquid inlet assembly (5) is opened or closed by the axial movement of the valve ring (523).

8. The device for lifting fluid according to claim 7, characterized in that A central hole (5211) is also provided on the liquid inlet platform (521) and extends along the axial direction of the liquid inlet platform (521). The lower stroke mechanism (42) further comprises a plunger (422) which is provided at the free end of the liquid flow valve (421) and extends downward. The plunger (422) passes through the central hole (5211) in a sealed manner and extends to the outside, and is capable of axial movement along the central hole (5211).

9. The device for lifting fluid according to claim 8, characterized in that The lower stroke mechanism (42) further comprises a hollow connector (423) for connecting the plunger (422) and the liquid flow valve (421) into one body, and at least one liquid flow hole (4231) for connecting the lower chamber (32) with the interior of the connector (423) is provided on a side wall of the connector (423).

10. The device for lifting fluid according to claim 1, characterized in that A stabilizing portion (14) is provided on the inner wall of the upper cylinder (1); the stabilizing portion (14) is in sealing contact with the pull rod (411) and allows the pull rod (411) to pass through the stabilizing portion (14) and move axially.

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