A seal, an underground fluid self-driven extraction device and an extraction method thereof

Abstract

The present invention provides a seal, an underground fluid self-driven extraction device and an extraction method thereof, including main components such as a driving piston and an energy replenisher. The driving piston is provided with a power sensing member, a seal and a driving member. The power sensing component can realize the perception of power and signals. The seal can realize the efficient sealing of the driving piston and separate the fluid in the oil pipe. The sealing motor enables the sealing rubber barrel to expand or contract according to the actual pressure, realizing the matching with the external pressure, having better sealing performance, especially not interfering with the flow rate, realizing the stability of the flow rate, and realizing the adaptive control of sealing and driving through sensors, controllers and signal transceivers, improving the control intelligence and reducing the manual management cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground drainage and gas extraction, and particularly relates to a seal, an underground fluid self-driven extraction device and an extraction method thereof. Background Art

[0002] Traditional plunger extraction of underground fluids has problems such as poor plunger sealing, unstable flow rate, high manual management cost, and low intelligence level. For example, the invention patent application with the patent application number CN201510213971.9 discloses an intelligent plunger type drainage and gas production device, which mainly completes the gas-liquid barrier in the gas well through the rubber seal outside the switch housing. It completely relies on the elastic deformation of the rubber seal itself, cannot withstand large pressures and pressure changes, and is extremely easy to wear and become invalid, requiring frequent replacement of the rubber seal, resulting in extremely unstable flow rate and increased management costs. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of poor plunger sealing, unstable flow rate, high management cost, and low service efficiency in the prior art.

[0004] To achieve the above object, the present invention provides a seal, which is characterized in that it includes a seal rubber cylinder, an inverted T-shaped seal sliding sleeve, an upper seal gland, an upper seal gasket, a seal support, a lower seal gasket, a lower seal gland, and two symmetrically arranged racks placed inside the seal rubber cylinder, two symmetrically arranged seal motors, and two symmetrically arranged seal motor supports;

[0005] The column of the inverted T-shaped seal sliding sleeve extends upward to the outside of the top opening of the seal rubber cylinder; the upper seal gland is sleeved on the column outside the top of the seal rubber cylinder;

[0006] The upper seal gasket is sleeved on the column and placed between the upper seal gland and the top of the seal rubber cylinder;

[0007] The bottom annular part of the inverted T-shaped seal sliding sleeve is placed inside the seal rubber cylinder and presses against the inner side of the top of the seal rubber cylinder;

[0008] The seal support is T-shaped, and its column part extends downward to the outside of the bottom opening of the seal rubber cylinder;

[0009] The lower seal gasket and the lower seal gland are placed outside the bottom of the seal rubber cylinder and are sequentially sleeved on the column part from top to bottom;

[0010] The top annular part of the seal support presses against the inner side of the bottom of the seal rubber cylinder;

[0011] The top of the rack is fixedly connected to the bottom of the inverted T-shaped seal sliding sleeve;

[0012] The sealed motor is fixed on the sealed motor support, and the sealed motor support is fixed on the top of the sealed support;

[0013] The sealed motor is connected to a half-ring gear, and the half-ring gear meshes with the rack;

[0014] The sealed rubber cylinder is filled with insulating coolant.

[0015] Meanwhile, a self-driven underground fluid extraction device is provided, which includes a driving piston composed of a power sensing part, a sealing part and a driving part connected in sequence from top to bottom. The special feature is that the power sensing part includes an upper shell, a lower shell integrally provided with the upper shell, and a central tube coaxial with the upper shell and the lower shell and penetrating through the upper shell and the lower shell;

[0016] A wireless charging disk is installed on the top of the upper shell, a first data transceiver is installed on the side of the upper shell, and a controller and a cushion layer stacked up and down are installed inside the bottom of the upper shell;

[0017] A battery pack is installed inside the lower shell;

[0018] The central tube penetrates through the controller, the cushion layer and the battery pack;

[0019] A top cover placed at the bottom of the wireless charging disk is arranged at the top of the central tube. An upper temperature sensor and an upper pressure sensor are installed on the top of the top cover, and the upper temperature sensor and the upper pressure sensor are located in the central hole of the wireless charging disk;

[0020] Two symmetrical upper positioning wheels are arranged on the outer side of the lower shell;

[0021] A power communication channel is arranged inside the central tube. The upper part of the power communication channel is communicated with the bottom of the top cover to provide a cable channel for connecting the upper temperature sensor and the upper pressure sensor;

[0022] An upper sealing port located above the controller is opened on the side of the central tube as a connection channel for the power communication channel with the controller and the data transceiver;

[0023] The sealing part is the aforementioned sealing part;

[0024] The bottom of the lower shell touches the top of the inverted T-shaped sealing sliding sleeve;

[0025] Coaxial perforations extending from top to bottom are opened on both the inverted T-shaped sealing sliding sleeve and the sealing support; The lower section of the central tube is inserted to the bottom end of the perforation; The power communication channel extends downward to the bottom end of the central tube;

[0026] An upper sealing plate is arranged between the bottom end of the central pipe and the lower sealing port of the power communication channel;

[0027] One middle sealing port is opened on one side between the lower section of the central pipe and the inverted T-shaped sealing sliding sleeve and the sealing support, serving as a cable channel for the power communication channel and the sealing motor;

[0028] A plurality of sliding sleeve sealing rings arranged from top to bottom are provided between the inverted T-shaped sealing sliding sleeve and the central pipe.

[0029] Furthermore, it further includes an energy replenisher, a flow discharge cover and an electric gate valve; the energy replenisher includes an energy replenisher housing, a movable plate, an electromagnet and a pneumatic spring arranged in the energy replenisher housing, and one end of the pneumatic spring is connected to the electromagnet and the other end extends out of a perforation on the right side surface of the energy replenisher housing;

[0030] A plurality of wireless charging modules are arranged on the top surface of the energy replenisher housing;

[0031] The left side of the movable plate contacts the inner side of the left side surface of the energy replenisher housing; an outward extending inclined slope is provided at the right end of the movable plate, and the lower end of the inclined slope extends to the bottom surface of the energy replenisher housing;

[0032] A plurality of compression springs are arranged between the movable plate and the bottom surface of the energy replenisher housing;

[0033] A top hole and a bottom hole are opened on the top surface and the bottom surface of the energy replenisher housing; the flow discharge cover is fixed on the top surface of the energy replenisher housing and communicated with the top hole, and a flow discharge orifice plate is arranged in the top hole; a flow discharge pipe is arranged on the right side of the flow discharge cover;

[0034] The gate valve housing of the electric gate valve is fixed on the bottom surface of the energy replenisher housing outside the bottom hole and communicated with the bottom hole; the gate of the electric gate valve is horizontally arranged on the gate valve housing;

[0035] A second data transceiver is arranged on the right side of the bottom surface of the energy replenisher housing, which is used to receive the data transmitted by the first data transceiver to realize the on-off control of the electromagnet, the pneumatic spring and the electric gate valve.

[0036] Finally, a self-driven underground fluid extraction method by a self-driven underground fluid extraction device is also provided, including the following steps:

[0037] 1), After connecting the slotted pipe with the oil pipe and lowering it into the well, put 3 driving pistons into the slotted pipe, and then connect the pulsating pipe, the electric gate valve and the energy replenisher in sequence from bottom to top through the wellhead device at the top of the oil pipe;

[0038] 2) Close the electric gate valve, send a pulsating pressure signal to the upward pressure sensor through the pulsating channel, and send a sealing motor working instruction through the controller to expand the sealing rubber tube to contact the inner wall of the flower tube to achieve sealing. Then, the controller sends a driving motor working instruction, and the driving motor drives the driving blade to rotate, pushing the driving piston upward, and finally discharges the fluid on the upper part of the driving piston to the ground through the pulsating channel;

[0039] 3) Write the inner diameter and length parameters of the oil pipe into the controller in advance, and calculate the position of the driving piston in the oil pipe by the total volume of the fluid flowing out of the pulsating channel. When the driving piston is 20 meters away from the wellhead device, the data transceiver transmits data to the upper data transceiver;

[0040] 4) When the battery pack is low on power, close the pulsation channel, open the electric gate valve, and drive the piston to continue to move upward; when the top of the driving piston contacts the bottom of the discharge plate, the data transceiver transmits a signal to the controller to make the sealing motor work and shrink the sealing rubber cylinder; at this time, the upper data transceiver controls the electromagnet to work and suck the driving piston, and the pneumatic spring works to drive the piston to move to the left side of the energy compensator housing; when the driving piston moves to the right position, the electromagnet is powered off, the pneumatic spring is reset, and the wireless charging module charges the battery pack through the wireless charging plate;

[0041] 5) Close the electric gate valve and repeat step 2). When the battery pack is fully charged, the piston is driven to move to the pulsation channel. The lower data transceiver transmits a signal to the data transceiver, and the controller transmits the working instruction of the sealing motor to shrink the sealing rubber cylinder, realizing double confirmation with step 4), shrinking the piston, and driving the piston to descend to the initial position by gravity, and repeating step 2.

[0042] The advantages of the present invention are:

[0043] The sealing motor allows the sealant barrel to expand or contract according to the actual pressure, thereby matching the external pressure and having better sealing performance. In particular, it will not interfere with the flow rate and achieves flow stability. The sensors, controllers and signal transceivers are used to achieve adaptive control of sealing and driving, which improves the intelligent control, reduces labor management costs and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the half-section structure of the driving piston.

[0045] Figure 2 is a cross-sectional view of the seal.

[0046] Figure 3 It is a cross-sectional view of the power sensor.

[0047] Figure 4 It is a cross-sectional view of the driving piston.

[0048] Figure 5 It is a sectional view of the driving part.

[0049] Figure 6 It is a plan view of the battery pack setting.

[0050] Figure 7 It is a schematic structural diagram of the energy replenisher and the flow discharge cover.

[0051] Figure 8 It is a sectional view of the structure setting of the energy replenisher, the flow discharge cover and the electric gate valve.

[0052] Figure 9 It is a sectional view of the structure setting of the electromagnet and the pneumatic spring.

[0053] Figure 10 It is a schematic structural diagram of the implementation of the self-driving underground fluid extraction method.

[0054] Figure 11 It is a schematic structural diagram of the setting of the lower positioning wheel on the housing of the power component. Specific implementation mode

[0055] In order to overcome the problems of poor sealing of the existing plunger, unstable flow rate, high management cost and low use efficiency, this embodiment provides a component with better wear resistance and sealing performance than the existing sealing switch and sealing rubber sleeve, specifically a Figure 2 sealing member as shown, which is applied to Figure 1 the underground fluid self-driving extraction device as shown. The underground fluid self-driving extraction device mainly includes a driving piston formed by sequentially connecting a power sensing member 1, a sealing member 2 and a driving member 3 from top to bottom. Among them, the sealing member 2 includes a sealing rubber cylinder 201, an inverted T-shaped sealing sliding sleeve 202, an upper sealing gland 203, an upper sealing gasket 204, a sealing support 205, a lower sealing gasket 206, a lower sealing gland 207, and two racks 208 symmetrically arranged in the sealing rubber cylinder 201, two sealing motors 209 symmetrically arranged and two sealing motor supports 210 symmetrically arranged.

[0056] Among them, the cylinder of the inverted T-shaped sealing sliding sleeve 202 extends upward to the outside of the top opening of the sealing rubber cylinder 201; the upper sealing gland 203 is sleeved on the cylinder outside the top of the sealing rubber cylinder 201; the upper sealing gasket 204 is sleeved on the cylinder and placed between the upper sealing gland 203 and the top of the sealing rubber cylinder 201; the bottom annular part of the inverted T-shaped sealing sliding sleeve 202 is placed inside the sealing rubber cylinder 201 and presses against the inner side of the top of the sealing rubber cylinder 201; and the sealing support 205 is T-shaped, and its cylinder part extends downward to the outside of the bottom opening of the sealing rubber cylinder 201; the lower sealing gasket 206 and the lower sealing gland 207 are placed outside the bottom of the sealing rubber cylinder 201 and are sleeved on the cylinder part in sequence from top to bottom; the top annular part of the sealing support 205 presses against the inner side of the bottom of the sealing rubber cylinder 201; and the top of the rack 208 is fixedly connected to the bottom of the inverted T-shaped sealing sliding sleeve 202; the sealing motor 209 is fixed on the sealing motor support 210, and the sealing motor support 210 is fixed on the top of the sealing support 205; the sealing motor 209 is connected to a half ring gear 211, and the half ring gear 211 meshes with the rack 208; the sealing rubber cylinder 201 is filled with insulating coolant. A liquid injection channel 213 is opened on the sealing support 205, and a sealing cover 214 is provided at the entrance of the liquid injection channel 213.

[0057] The sealing process of the seal 2 is as follows: The sealing motor 209 rotates forward ( Figure 2 , Figure 4 the right motor on the right side should be on the left side of the rack, and the L-shaped direction of the right rack should be the same as that of the left rack) and drives the rack 208 to move downward through the half ring gear 211, and then drives the inverted T-shaped sealing sliding sleeve 202 connected to the rack 208 to move downward, and inwardly squeezes the sealing rubber cylinder 201 through the upper sealing gland 203 and the upper sealing gasket 204, and then squeezes the insulating coolant in the sealing rubber cylinder 201 (the bottom of the sealing rubber cylinder 201 is sealed and supported by the sealing support 205 and remains stationary). Under the extrusion of the insulating coolant, the circumferential side wall of the sealing rubber cylinder 201 bulges outward, so that it can be tightly pressed against the inner wall of the pipeline to be sealed, realizing the upper and lower sealing of the pipeline. On the contrary, the inverted T-shaped sealing sliding sleeve 202 is pushed up or pushed out of the sealing rubber cylinder 201 by the reverse rotation of the sealing motor 209, so that the sealing rubber barrel 201 returns to its initial state and the sealing of the pipeline is released.

[0058] By Figure 2It can be clearly seen that in order to improve the sealing performance of the sealant bucket 201, in this embodiment, the upper sealing gasket 204 and the outer side of the top of the sealant cylinder 201 are pressed together through a concave-convex surface structure; at the same time, the bottom annular part of the inverted T-shaped sealing sliding sleeve 202 and the inner side of the top of the sealant cylinder 201 are also pressed together through a concave-convex surface structure; the top annular part of the sealing support 205 and the inner side of the bottom of the sealant cylinder 201 are pressed together through a concave-convex surface structure; the lower sealing gasket 206 and the outer side of the bottom of the sealant cylinder 201 are pressed together through a concave-convex surface structure. The concave-convex surface structure involved here refers to that among the two surfaces pressed against each other, one surface is provided with a depression, and the other surface is provided with a protrusion that matches and fits with the depression. Through the matching extrusion of the depression and the protrusion, multi-site sealing is achieved, and the sealing effect is improved.

[0059] In this embodiment, the rack 208 is set as an inverted L shape, and its top straight part is connected to the bottom of the inverted T-shaped sealing sliding sleeve 202, which can enhance the connection stability between the rack and the inverted T-shaped sealing sliding sleeve, and at the same time facilitate the operation of the connection structure.

[0060] In order to facilitate the laying of signal control lines and conductive wires during intelligent control, in this embodiment, a coaxial through hole one 212 extending from top to bottom is opened on both the inverted T-shaped sealing sliding sleeve 202 and the sealing support 205. Through this through hole one 212, pipes can be passed through to form a power and signal transmission channel.

[0061] Figure 1 In the driving piston of a self-driven underground fluid extraction device shown, the power sensing member 1 is as Figure 3 shown, including an upper housing 101, a lower housing 106 integrally provided with the upper housing 101, and a central tube 108 coaxial with the upper housing 101 and the lower housing 106 and passing through the upper housing 101 and the lower housing 106; a wireless charging disk 102 is installed on the top of the upper housing 101, and a ring-shaped charging belt is provided on the wireless charging disk 102 for use as a charging docking part.

[0062] A first data transceiver 103 is installed on the side of the upper housing 101, and a controller 104 and a cushion layer 105 stacked up and down are installed inside the bottom of the upper housing 102; while a battery pack 107 is installed inside the lower housing 106 and is electrically connected to the wireless charging disk 102 to provide power supply for the driving piston. The battery pack 107 is composed of Figure 6It consists of the cylindrical battery 115 and the thermal conductive silica gel 116 shown. The cylindrical batteries are arranged in 3 layers in a circular pattern in the space between the outer wall of the central tube 108 and the inner wall of the lower housing 106. The gaps between the cylindrical batteries 115 are filled with the thermal conductive silica gel 116. The cylindrical battery 115 is used to store electricity and provide sufficient power for the sealed motor and the driving motor. The thermal conductive silica gel 116 is used to fill the gaps between the cylindrical batteries 115 to support the cylindrical batteries 115, and can also transfer the heat of the battery during charging to make the temperature of the entire battery pack 107 uniform. The top of the battery pack 107 is connected to the bottom of the cushion layer 105, the inner wall of the battery pack 107 is in contact with the outer wall of the central tube 108, the outer wall of the battery pack 107 is in contact with the inner wall of the lower housing 106, and the bottom of the battery pack 107 is in contact with the bottom of the lower housing 106.

[0063] The central tube 108 penetrates through the controller 104, the cushion layer 105 and the battery pack 107; and a top cover 109 is provided at the top of the central tube 108 and placed at the bottom of the wireless charging disc 102. An upper temperature sensor 110 and an upper pressure sensor 111 are installed on the top of the top cover 109. The upper temperature sensor 110 and the upper pressure sensor 111 are located in the central hole of the wireless charging disc 102, and the top surface is lower than the top surface of the wireless charging disc 102 to prevent wear on the upper temperature sensor 110 and the upper pressure sensor 111. Two symmetric upper positioning wheels 112 are provided on the outside of the lower housing 106 to ensure the coaxiality during the use of the driving piston and avoid skewing.

[0064] Combined Figure 4 As can be seen, a power communication channel 113 is provided in the central tube 108. The upper part of the power communication channel 113 is communicated with the bottom of the top cover 109 to provide a cable channel for connecting the upper temperature sensor 110 and the upper pressure sensor 111; an upper seal port 114 is opened on the side of the central tube 108 above the controller 104 as a connection channel between the power communication channel 113 and the controller 104 and the first data transceiver 103. The lower section of the central tube 108 is inserted to the bottom end of the through hole 212; the power communication channel 113 extends downward to the bottom end of the central tube 108; an upper seal plate 116 is provided between the bottom end of the central tube 108 and the lower seal port 115 of the power communication channel 113; a middle seal port 117 is opened on one side of the lower section of the central tube 108 between the inverted T-shaped seal sliding sleeve 202 and the seal support 205 as a cable channel between the power communication channel 113 and the sealed motor 209; a plurality of sliding sleeve seal rings 215 are arranged from top to bottom between the inverted T-shaped seal sliding sleeve 202 and the central tube 108. The power supply cable and signal cable of the sealed motor 209 enter the power communication channel 113 through the middle seal port 117 and are then connected to the controller 104 through the upper seal port 114.

[0065] The driving member 3 in the driving piston is as Figure 4 、5 As shown in the figure, it includes a housing, a drive motor 302 arranged inside the housing, and a drive blade 316 arranged at the bottom of the housing; the housing includes an upper drive housing 301 and a lower drive housing 309; the top of the upper drive housing 301 is connected to the bottom of the sealing support 205, and the bottom of the upper drive housing 301 is connected to the inner side of the lower drive housing 309; the lower sealing port 115 is arranged inside the top of the upper drive housing 301; the power supply line of the drive motor 302 enters the power communication channel 113 through the lower sealing port 115 and is then connected to the controller 104 through the upper sealing port 114.

[0066] The drive motor 302 is fixed to the inner side of the lower drive housing 309 by two symmetrically arranged motor brackets 303; a upper drive shaft 304 is connected to the middle of the drive motor 302 and is arranged between the two symmetrically arranged motor brackets 303; and a plurality of circumferentially arranged outer permanent magnets 305 are arranged at the lower end of the upper drive shaft 304, and the outer permanent magnets 305 extend axially; a through hole 307 is formed in the lower drive housing 309 corresponding to the upper drive shaft 304, and an isolation sleeve 308 is arranged in the groove space formed by the lower end of the upper drive shaft 304 and the plurality of circumferentially arranged outer permanent magnets 305, and the notch of the isolation sleeve 308 is connected to the outer edge of the through hole 307; a rotating bearing 310 is arranged at the center of the bottom of the groove of the isolation sleeve 308, and a lower drive shaft 311 is connected to the rotating bearing 310 and then passes through the through hole 307 downward and is connected to the drive blade 316. And an inner permanent magnet 312 is arranged on the top section of the lower drive shaft 311 placed inside the isolation sleeve 308 to transmit the rotary motion of the drive motor 302 to the lower drive shaft 311 under the magnetic force of the outer permanent magnet 305, thereby driving the drive blade 316 to rotate.

[0067] A thrust support 313 is arranged outside the lower drive housing 309, and the thrust support 313 is arranged above the drive blade 316;

[0068] An upper thrust plate 314 is arranged between the lower drive housing 309 and the thrust support 313; a lower thrust plate 315 is arranged between the thrust support 313 and the drive blade 316; both the upper thrust plate 314 and the lower thrust plate 315 are sleeved on the lower drive shaft 311; an upper thrust ball 317 is arranged between the upper thrust plate 314 and the thrust support 313, and a lower thrust ball 318 is arranged between the lower thrust plate 315 and the thrust support 313.

[0069] A vane sheath 319 is connected to the bottom of the lower housing 309 of the drive, enclosing the thrust bearing 313, the lower drive shaft 311 and the drive vane 316 to protect the drive vane 316. Finally, it should be noted in the specification that two symmetrically arranged lower positioning wheels 320 are provided on the upper housing 301 of the drive. The lower positioning wheels 320 and the upper positioning wheels 112 are respectively arranged on two mutually perpendicular radial directions. The main function is to keep the drive piston centered, prevent uneven force on the drive piston, and avoid eccentric wear of the sealing rubber cylinder.

[0070] Based on the aforementioned underground fluid self-driven extraction device, it further includes Figure 7 The energy replenisher 5 for replenishing electric energy to the drive piston, the flow discharge cover 6 provided at the liquid outlet of the energy replenisher 5, and the electric gate valve provided at the liquid inlet of the energy replenisher 5 as shown.

[0071] Among them, the energy replenisher 5 includes Figure 8 The energy replenisher housing 500 as shown, the movable plate 504 placed inside the energy replenisher housing 500, the electromagnet 506, and the pneumatic spring 507 with one end connected to the electromagnet 506 and the other end extending out of the through hole two 503 on the right side of the energy replenisher housing 500.

[0072] Among them, a plurality of wireless charging modules 508 are provided on the top surface of the energy replenisher housing 500 for charging the battery pack 107 through the wireless charging disk 102.

[0073] The left side of the movable plate 504 is in contact with the inner side of the left side surface of the energy replenisher housing 500; an outwardly extending inclined downhill 509 is provided at the right end of the movable plate 504, and the lower end of the inclined downhill 509 extends to the bottom surface of the energy replenisher housing 500. The inclined downhill 509 serves as a transition zone for the drive piston to move from right to left, preventing the drive piston from getting stuck during the movement to the left side of the energy replenisher 5. A plurality of compression springs 505 are provided between the movable plate 504 and the bottom surface of the energy replenisher housing 500 to upwardly support the movable plate to clamp the drive piston entering the energy replenisher.

[0074] Top holes 501 (liquid outlets) and bottom holes 502 (liquid inlets) are opened on the top surface and the bottom surface of the energy replenisher housing 500; a flow discharge orifice plate 601 is provided in the top hole 501; the inner side surface of the top surface of the energy replenisher housing 500 and the inner bottom surface (the orientation towards the inside of the energy replenisher housing is the inside) of the flow discharge orifice plate 601 are in the same plane to prevent the drive piston from being blocked during operation and unable to be charged. A flow discharge pipe 602 is provided on the right side of the flow discharge cover 6 for continuously discharging the fluid after the drive piston passes through the electric gate valve.

[0075] The gate valve housing 701 of the electric gate valve is fixed on the bottom surface of the energy charger housing 500 outside the bottom hole 502 and communicated with the bottom hole 502; the gate 702 of the electric gate valve is transversely arranged on the gate valve housing 701. The electric gate valve is used to keep the energy charger relatively dry when charging the driving piston, and there is no liquid to interfere with the wireless charging efficiency.

[0076] A data transceiver is provided on the right side of the bottom surface of the energy charger housing 500 for receiving data transmitted by the first data transceiver 103 to realize on-off control of the electromagnet 506, the pneumatic spring 507 and the electric gate valve.

[0077] Based on the above embodiments, this embodiment provides a Figure 10 The structure diagram of the self-driven underground fluid extraction method shown in the figure includes the following steps:

[0078] 1) Connect the flower tube 10 with the oil pipe 9 and lower it into the well. Put the three driving pistons into the flower tube 10. Then, connect the pulsation tube 8, the electric gate valve and the energy compensator 5 from bottom to top on the top of the oil pipe 9 through the wellhead device 11.

[0079] 2) Close the electric gate valve, send a pulsating pressure signal to the upward pressure sensor 111 through the pulsating channel 801, and send a working instruction to the sealing motor 209 through the controller 104, so that the sealing rubber cylinder 201 expands to contact the inner wall of the flower tube 10 to achieve sealing. Then, the controller 104 sends a working instruction to the driving motor 302, and the driving motor 302 drives the driving blade 311 to rotate, pushing the driving piston upward, and finally discharges the fluid on the upper part of the driving piston to the ground through the pulsating channel 801;

[0080] 3) The inner diameter and length parameters of the oil pipe 9 are written into the controller 104 in advance, and the position of the driving piston in the oil pipe 9 is calculated by the total volume of the fluid flowing out of the pulsation channel 804. When the driving piston is 20-30 meters away from the wellhead device 11, the first data transceiver 103 transmits data to the upper data transceiver;

[0081] 4) When the battery pack 107 is low on power, the pulsation channel 801 is closed, the electric gate valve is opened, and the driving piston continues to move upward; when the top of the driving piston contacts the bottom of the discharge plate 601, the first data transceiver 103 transmits a signal to the controller 104 to make the sealing motor 209 work, so that the sealing rubber cylinder 201 shrinks; at this time, the upper data transceiver works according to the signal received from the first data transceiver 103, and the electromagnet 506 works to attract the driving piston, and the pneumatic spring 507 works to push the driving piston to the left side of the energy compensator housing; when the driving piston moves to the right position, the electromagnet 506 is powered off, the pneumatic spring 507 is reset, and the wireless charging module charges the battery pack 107 through the wireless charging plate 102;

[0082] 5) Close the electric gate valve and repeat step 2). When the battery pack 107 has sufficient power and the driving piston moves to the pulsation channel 801, the lower data transceiver transmits a signal to the first data transceiver 103, and the controller 104 transmits an operating instruction for the sealing motor 209 to cause the sealing rubber cylinder 201 to contract. The driving piston drops to the initial position by gravity and repeat step 2.

[0083] The algorithm for calculating the position of the driving piston in the oil pipe 9 based on the total volume of the fluid flowing out through the pulsation channel 801 in step 3) is as follows:

[0084]

[0085] In the formula: h - the position of the driving piston in the oil pipe, m; P 底 - the liquid pressure at the bottom of the oil pipe, MPa; V 出 - the volume of the fluid flowing out of the pulsation channel, m 3 ; A - the cross-sectional area of the inner diameter of the oil pipe, m 2 .

Claims

1. A seal, characterized in that, It includes a sealing rubber cylinder (201), an inverted T-shaped sealing sliding sleeve (202), an upper sealing gland (203), an upper sealing gasket (204), a sealing support (205), a lower sealing gasket (206), a lower sealing gland (207), and two symmetrically arranged racks (208) placed inside the sealing rubber cylinder (201), two symmetrically arranged sealing motors (209), and two symmetrically arranged sealing motor supports (210); The cylinder of the inverted T-shaped sealing sliding sleeve (202) extends upward beyond the top opening of the sealing rubber cylinder (201); the upper sealing gland (203) is sleeved on the cylinder outside the top of the sealing rubber cylinder (201); The upper sealing gasket (204) is sleeved on the cylinder and placed between the upper sealing gland (203) and the top of the sealing rubber cylinder (201); The bottom annular part of the inverted T-shaped sealing sliding sleeve (202) is placed inside the sealing rubber cylinder (201) and presses against the inner side of the top of the sealing rubber cylinder (201); the sealing support (205) is T-shaped, and its cylinder part extends downward beyond the bottom opening of the sealing rubber cylinder (201); The lower sealing gasket (206) and the lower sealing gland (207) are placed outside the bottom of the sealing rubber cylinder (201) and are sleeved on the cylinder part in sequence from top to bottom; The top annular part of the sealing support (205) presses against the inner side of the bottom of the sealing rubber cylinder (201); The top of the rack (208) is fixedly connected to the bottom of the inverted T-shaped sealing sliding sleeve (202); The sealing motor (209) is fixed on the sealing motor support (210), and the sealing motor support (210) is fixed on the top of the sealing support (205); The sealing motor (209) is connected to a half-ring gear (211), and the half-ring gear (211) meshes with the rack (208); The sealing rubber cylinder (201) is filled with insulating coolant.

2. The seal according to claim 1, characterized in that, The upper sealing gasket (204) and the outer side of the top of the sealing rubber cylinder (201) are pressed together through a concave-convex surface structure; The bottom annular part of the inverted T-shaped sealing sliding sleeve (202) and the inner side of the top of the sealing rubber cylinder (201) are pressed together through a concave-convex surface structure; The top annular part of the sealing support (205) and the inner side of the bottom of the sealing rubber cylinder (201) are pressed together through a concave-convex surface structure; The lower sealing gasket (206) and the outer side of the bottom of the sealing rubber cylinder (201) are pressed together through a concave-convex surface structure.

3. The seal according to claim 1 or 2, characterized in that, The rack (208) is L-shaped in reverse, and its top straight part is connected to the bottom of the inverted T-shaped sealing sliding sleeve (202).

4. The seal according to claim 1 or 2, characterized in that, An axially extending perforation one (212) is provided on both the inverted T-shaped sealing sliding sleeve (202) and the sealing support (205) from top to bottom.

5. The seal according to claim 1 or 2, characterized in that, A liquid injection channel (213) is provided on the sealing support (205), and a sealing cover (214) is provided at the entrance of the liquid injection channel (213).

6. An underground fluid self-driven extraction device, comprising a driving piston composed of a power sensing member (1), a sealing member (2) and a driving member (3) connected in sequence from top to bottom, characterized in that, The power sensing component (1) includes an upper housing (101), a lower housing (106) integrally provided with the upper housing (101), and a central tube (108) coaxial with the upper housing (101) and the lower housing (106) and penetrating through the upper housing (101) and the lower housing (106); A wireless charging disk (102) is installed at the top of the upper housing (101), a first data transceiver (103) is installed on the side of the upper housing (101), and a controller (104) and a cushion layer (105) stacked up and down are installed inside the bottom of the upper housing (101); A battery pack (107) is installed inside the lower housing (106); The central tube (108) penetrates through the controller (104), the cushion layer (105) and the battery pack (107); A top cover (109) placed at the bottom of the wireless charging disk (102) is provided at the top of the central tube (108), an upper temperature sensor (110) and an upper pressure sensor (111) are installed at the top of the top cover (109), and the upper temperature sensor (110) and the upper pressure sensor (111) are located in the central hole of the wireless charging disk (102); Two symmetric upper positioning wheels (112) are provided on the outer side of the lower housing (106); A power communication channel (113) is provided inside the central tube (108), and the upper part of the power communication channel (113) communicates with the bottom of the top cover (109) to provide a cable channel for connecting the upper temperature sensor (110) and the upper pressure sensor (111); An upper sealing port (114) located above the controller (104) is opened on the side of the central tube (108) as a connection channel for the power communication channel (113) with the controller (104) and the first data transceiver (103); The seal (2) is the seal described in claim 1 or 2; The bottom of the lower housing (106) is in contact with the top of the inverted T-shaped seal sliding sleeve (202); A coaxial perforation one (212) extending downward is opened on both the inverted T-shaped seal sliding sleeve (202) and the seal support (205); the lower section of the central tube (108) is inserted into the bottom end of the perforation one (212); the power communication channel (113) extends downward to the bottom end of the central tube (108); An upper sealing plate (116) is provided between the bottom end of the central tube (108) and the lower sealing port (115) of the power communication channel (113); a middle sealing port (117) is opened on one side of the lower section of the central tube (108) between the inverted T-shaped seal sliding sleeve (202) and the seal support (205) as a cable channel for the power communication channel (113) with the seal motor (209); A plurality of sliding sleeve sealing rings (215) arranged from top to bottom are provided between the inverted T-shaped seal sliding sleeve (202) and the central tube (108).

7. The underground fluid self-driven extraction device according to claim 6, characterized in that, The driving component (3) includes a housing, a driving motor (302) arranged inside the housing, and a driving blade (316) arranged at the bottom of the housing; The housing includes an upper driver housing (301) and a lower driver housing (309); The top of the upper driver housing (301) is connected to the bottom of the sealing support (205), and the bottom of the upper driver housing (301) is connected to the inner side of the lower driver housing (309); the lower sealing port (115) is placed inside the top of the upper driver housing (301); The drive motor (302) is fixed to the inner side of the lower driver housing (309) by two symmetrically arranged motor brackets (303); The middle of the drive motor (302) is connected to an upper drive shaft (304) placed between the two symmetrically arranged motor brackets (303); The lower end of the upper drive shaft (304) is provided with a plurality of circumferentially arranged outer permanent magnets (305), and the outer permanent magnets (305) extend axially; A through hole (307) is opened on the lower driver housing (309) corresponding to the upper drive shaft (304), and an isolation sleeve (308) is placed in the groove space formed by the lower end of the upper drive shaft (304) and the plurality of circumferentially arranged outer permanent magnets (305), and the notch of the isolation sleeve (308) is connected to the outer edge of the through hole (307); A rotary bearing (310) is arranged at the center of the bottom of the groove of the isolation sleeve (308), and a lower drive shaft (311) is connected to the rotary bearing (310) and then passes downward through the through hole (307) and is connected to the drive blade (316); an inner permanent magnet (312) is arranged on the outer top section of the lower drive shaft (311) placed in the isolation sleeve (308) to transmit the rotary motion of the drive motor (302) to the lower drive shaft (311) under the magnetic force of the outer permanent magnets (305); A thrust support (313) is arranged on the outside of the lower driver housing (309), and the thrust support (313) is placed above the drive blade (316); An upper thrust plate (314) is arranged between the lower driver housing (309) and the thrust support (313); a lower thrust plate (315) is arranged between the thrust support (313) and the drive blade (316); both the upper thrust plate (314) and the lower thrust plate (315) are sleeved on the lower drive shaft (311); An upper thrust ball (317) is arranged between the upper thrust plate (314) and the thrust support (313), and a lower thrust ball (318) is arranged between the lower thrust plate (315) and the thrust support (313).

8. The underground fluid self-driven extraction device according to claim 7, wherein, The bottom of the lower driver housing (309) is connected to a blade sheath (319) to enclose the thrust support (313), the lower drive shaft (311) and the drive blade (316).

9. The underground fluid self-driven extraction device according to claim 6, characterized in that It also includes an energy replenisher (5), a flow discharge cover (6) and an electric gate valve; The energy booster (5) comprises an energy booster housing (500), a movable plate (504) and an electromagnet (506) disposed in the energy booster housing (500), and a pneumatic spring (507) having one end connected to the electromagnet (506) and the other end extending from a second through hole (503) on the right side of the energy booster housing (500); A plurality of wireless charging modules (508) are arranged on the top surface of the energy charger housing (500); The left side of the movable plate (504) contacts the inner side of the left side surface of the energy booster housing (500); the right end of the movable plate (504) is provided with an outwardly extending inclined downhill slope (509), and the lower end of the inclined downhill slope (509) extends to the bottom surface of the energy booster housing (500); A plurality of compression springs (505) are arranged between the movable plate (504) and the bottom surface of the energy compensator housing (500); A top hole (501) and a bottom hole (502) are provided on the top and bottom surfaces of the energy charger shell (500); the leakage cover (6) is fixed on the top surface of the energy charger shell (500) and communicated with the top hole (501), and a leakage orifice plate (601) is provided in the top hole (501); a leakage pipe (602) is provided on the right side of the leakage cover (6); The gate valve housing (701) of the electric gate valve is fixed on the bottom surface of the energy compensator housing (500) outside the bottom hole (502) and is connected to the bottom hole (502); the gate (702) of the electric gate valve is transversely arranged on the gate valve housing (701); A second data transceiver is provided on the right side of the bottom surface of the energy compensator housing (500) for receiving data transmitted by the first data transceiver (103) to realize on / off control of the electromagnet (506), the pneumatic spring (507) and the electric gate valve.

10. A self-driven underground fluid extraction method using the underground fluid self-driven extraction device according to claim 6, characterized in that, The steps include: 1) Connect the flower tube (10) with the oil pipe (9) and lower it into the well, put the three driving pistons into the flower tube (10), and then connect the pulsation tube (8), the electric gate valve and the energy compensator (5) in sequence from bottom to top at the top of the oil pipe (9) through the wellhead device (11); 2) Close the electric gate valve, send a pulsating pressure signal to the upper pressure sensor (111) through the pulsating channel (801), and send a working instruction to the sealing motor (209) through the controller (104), so that the sealing rubber cylinder (201) expands to contact the inner wall of the flower tube (10) to achieve sealing. Then, the controller (104) sends a working instruction to the driving motor (302), and the driving motor (302) drives the driving blade (316) to rotate, pushing the driving piston upward, and finally discharges the fluid on the upper part of the driving piston to the ground through the pulsating channel (801); 3) The inner diameter and length parameters of the oil pipe (9) are written into the controller (104) in advance, and the position of the driving piston in the oil pipe (9) is calculated by the total volume of the fluid flowing out of the pulsation channel (801). When the driving piston is 20 meters away from the wellhead device (11), the first data transceiver (103) transmits data to the upper data transceiver; 4) When the battery pack (107) has insufficient power, close the pulsation channel (801), open the electric gate valve, and drive the piston to continue moving upward; when the top of the drive piston contacts the bottom of the flow discharge orifice plate (601), the first data transceiver (103) transmits a signal to the controller (104) to make the sealing motor (209) work, causing the sealing rubber cylinder (201) to contract; at this time, the upper data transceiver controls the electromagnet (506) to work to hold the drive piston, and the pneumatic spring (507) works to push the drive piston to move to the left side of the energy replenishment device housing; when the drive piston moves in place, the electromagnet (506) is powered off, the pneumatic spring (507) resets, and the wireless charging module (508) charges the battery pack (107) through the wireless charging plate (102); 5) Close the electric gate valve, repeat step 2), when the battery pack (107) has sufficient power and the drive piston moves to the pulsation channel (801), the lower data transceiver transmits a signal to the first data transceiver (103), and through the controller (104), issues a working instruction for the sealing motor (209) to make the sealing rubber cylinder (201) contract, achieving double confirmation with step 4), causing the piston to contract, and the drive piston descends to the initial position by gravity, and repeat step 2).

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