CN116398082B - Multi-aquifer packing device, water taking device and water taking method for deep geothermal well - Google Patents
Multi-aquifer packing device, water taking device and water taking method for deep geothermal well Download PDFInfo
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- CN116398082B CN116398082B CN202310664411.XA CN202310664411A CN116398082B CN 116398082 B CN116398082 B CN 116398082B CN 202310664411 A CN202310664411 A CN 202310664411A CN 116398082 B CN116398082 B CN 116398082B
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- central tube
- rubber cylinder
- driving
- sleeve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000012856 packing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 60
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 239000002195 soluble material Substances 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a multi-aquifer packing device, a water taking device and a water taking method for a deep geothermal well, and belongs to the technical field of mine packing water taking; the packing device comprises a central pipe, wherein the central pipe sequentially penetrates through the axes of the driving device, the rubber cylinder and the unlocking device from top to bottom; the rubber cylinder is made of elastic materials and deforms radially along the central tube under the pressure of the driving device; the water taking device comprises a sleeve, a perforation is arranged on the circumferential side surface of the sleeve, and temporary blocking blocks are filled in the perforation, and are made of water-soluble materials; the central tube is arranged in the sleeve, and the sleeve is sealed or unsealed through radial deformation of the rubber cylinder along the central tube; the device is convenient for directly taking water from the geothermal water layer at the bottom layer, improves the taking efficiency of geothermal water, does not need pipeline pressurization for the packing device, has simple structure and low manufacturing cost, and can greatly reduce the plugging cost of a geothermal well.
Description
Technical Field
The invention belongs to the technical field of mine isolation water taking, and particularly relates to a multi-aquifer isolation device, a water taking device and a water taking method for a deep geothermal well.
Background
Various geothermal resources are taken as renewable and recyclable clean energy sources, have very wide development and application prospects, and are more and more paid attention to and paid attention to the human society; especially geothermal water resources, sufficient reserve, convenient exploitation and convenient utilization; in the drilling engineering construction of developing geothermal water, because the thermal reservoir is generally buried deeply, when a plurality of aquifers exist, the sealing device is required to seal the aquifers on the upper part, so that the upper aquifers are isolated, and further the deep geothermal water is directly taken.
In the prior art, a pumping station is mainly used for pressurizing a packer in a pipeline matching mode to isolate an upper water-bearing layer, and further the purpose of taking deep geothermal water is achieved, but the method is suitable for layered pumping of a shallow geothermal well, and for the deep geothermal well, the quality requirement on a pressurizing pipeline is more severe due to the well depth, the pressurizing pipeline is too long, material waste can be caused, the pipeline is easy to damage, the using effect of the packer is further affected, and the service life of the packer is shortened.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a multi-aquifer packing device, a water taking device and a water taking method for a deep geothermal well, which abandon a pipeline pressurizing mode, efficiently plug the multi-aquifer of the deep geothermal well, facilitate the taking of the deep geothermal water and reduce the plugging cost of the geothermal well.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
The multi-aquifer packing device for the deep geothermal well comprises a central pipe, wherein the central pipe sequentially penetrates through the axes of a driving device, a rubber cylinder and an unlocking device from top to bottom;
the driving device is movably connected with the outer wall of the central tube, the driving device is provided with a hydraulic driving impeller, the hydraulic driving impeller is in threaded fit connection with the outer wall of the central tube through a self-locking nut, under the action of water pressure, the hydraulic driving impeller and the whole driving device move towards the direction of the rubber cylinder and generate pressure on the rubber cylinder, the rubber cylinder is made of elastic materials, and radial deformation along the central tube is generated under the pressure of the driving device;
the unlocking device comprises a locking clamp, a locking pin and a gear transmission device; one end of the locking clamp is hinged, the other end of the locking clamp is a free opening and closing end, the central tube penetrates through the locking clamp, the ball end of the locking pin is rotationally connected with one side of the free opening and closing end, and the other end of the locking pin penetrates through the other side of the free opening and closing end and is clamped on the end face of the side part of the locking clamp, so that the free opening and closing end of the locking clamp is locked; the gear transmission device comprises a transmission rod and a connecting device, wherein one end of the transmission rod is provided with a small impeller, the other end of the transmission rod is provided with a first gear, and the connecting device is provided with a second gear; the small impeller is positioned in the central tube, the first gear is meshed with the second gear, and the end part of the connecting device is connected with the ball end of the locking pin; when fluid is injected into the central tube, the small impeller is driven to rotate, and then the ball end of the locking pin is driven to rotate through the gear transmission device, so that the other end of the locking pin, which is clamped on the end face of the side part of the locking clamp, is rotated out of the free opening and closing end, and the locking clamp slides downwards from the central tube.
Preferably, the device further comprises a pressing device, wherein the pressing device is positioned between the driving device and the rubber cylinder, and the central tube penetrates through the axis of the pressing device and is in sliding connection with the pressing device.
Preferably, the pressing device is of an inverted truncated cone structure; the upper surface of the pressing device is contacted with the bottom surface of the driving device, and the lower surface of the pressing device is contacted with the top of the rubber cylinder; the top center of the rubber cylinder is sunken downwards to form a sinking groove, and the opening area of the sinking groove is larger than the lower surface area of the pressing device and smaller than the upper surface area of the pressing device.
More preferably, the driving device comprises a driving shell, a hydraulic driving impeller is arranged in the driving shell, at least one water inlet one-way valve is arranged at the top of the driving shell, and at least one water outlet one-way valve is arranged at the lower part of the driving shell; the driving shell is in rotary sealing connection with the central tube; the bottom surface of the driving shell is contacted with the upper surface of the pressing device.
Preferably, the rubber cylinder is of a washer-shaped structure, a connecting hole is formed in the axis of the rubber cylinder, and the connecting hole is in sliding sealing connection with the central tube; the circumference side of the rubber cylinder is inwards recessed to form at least one side groove, and the side groove is spirally arranged.
Preferably, a sealing ring is arranged on the contact surface of the locking clamp and the central tube.
The water taking device based on the multi-aquifer packing device of the deep geothermal well comprises a sleeve, wherein the circumferential side surface of the sleeve is provided with perforations, temporary blocking blocks are filled in the perforations, and the temporary blocking blocks are made of water-soluble materials; the central tube is arranged in the sleeve, and the sleeve is sealed or unsealed through radial deformation of the rubber cylinder along the central tube.
Preferably, a plurality of perforations are uniformly distributed on the sleeve; the dissolution rate of the temporary plugging block is selected according to the actual temperature of the geothermal water and the actual construction progress.
The water taking method adopting the water taking device based on the deep geothermal well multi-aquifer packing device comprises the following steps of:
1) And (3) casing: plugging the perforation by using a temporary plugging block, plugging the bottom of the casing, and putting the casing into a geothermal well;
2) Preparing a packing device: sequentially connecting an unlocking device, a rubber cylinder and a driving device of the packing device to the central tube, and lowering the central tube with the packing device into the sleeve;
3) And (3) packing: sealing the top of the geothermal well, injecting water into the sleeve to pressurize, and driving the impeller to rotate by water flow impact, wherein the driving device downwards rotates along the central tube to squeeze the rubber cylinder, and the waist of the rubber cylinder protrudes outwards to be in close contact with the inner wall of the sleeve so as to seal the sleeve;
4) Perforation penetration: after the sleeve is put in, the temporary blocking block is dissolved, and water in the water-containing layer enters the sleeve;
5) Taking water: taking water from the water in the sleeve at the lower side of the packing device through the central pipe;
6) Deblocking: after the water taking work is completed, the top of the geothermal well is sealed again, water is injected into the central tube to pressurize, under the action of the pressure in the well, the small impeller in the central tube rotates, the small impeller drives the gear transmission device, and then the locking pin rotates, when the locking pin rotates out of the locking clamp, the unlocking device slides downwards from the central tube and is clamped at the tail end of the central tube, the rubber cylinder is restored, and the plugging of the sleeve is relieved.
Preferably, a pressing device is arranged between the driving device and the rubber cylinder, and the driving device presses the rubber cylinder through the pressing device when rotating downwards along the central tube.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the perforation is arranged on the sleeve, the perforation is plugged through the temporary plugging block, the sleeve is plugged into the geothermal well, then the packer is plugged, the sleeve is sealed through plugging the wellhead, and then the well is pressurized, so that the rubber cylinder is compressed and expanded, other water layers are isolated, direct water taking of the bottom geothermal water layer is facilitated, the taking efficiency of geothermal water is improved, the plugging device does not need pipeline pressurization, the structure is simple, the manufacturing cost is low, and the plugging cost of the geothermal well can be greatly reduced.
2. The temporary plugging block is a soluble temporary plugging ball, after the casing pipe is put into the temporary plugging block, the injection hole can be plugged, underground water is prevented from entering the casing pipe, a sealed space is formed by a geothermal well, the well is pressurized, the installation of a plugging device is convenient, and meanwhile, the geothermal water is not influenced to enter the casing pipe after the temporary plugging block is melted, so that the taking of the geothermal water is convenient.
3. According to the invention, the sealing ring is arranged between the unlocking device and the central tube, the unlocking device is used for limiting the rubber cylinder, assisting in deformation of the rubber cylinder and blocking of the sleeve, when water taking is completed, the unlocking device is started, the small impeller on the unlocking device is driven to rotate by water pressure, and then the bevel gear transmission device drives the locking pin to rotate, so that the locking clamp drops from the central tube, locking of the rubber cylinder and blocking of an aquifer are released, and the subsequent use of a hot well is facilitated. The device is suitable for sealing and isolating the multi-aquifer environment of the deep geothermal well.
Drawings
Fig. 1 is a schematic structural view of a sleeve according to the present invention.
Fig. 2 is an isometric view of a packing assembly according to the present invention.
FIG. 3 is a bottom isometric view of the packing assembly of the present invention.
Fig. 4 is a schematic top view of the packing device of the present invention.
FIG. 5 is a schematic view of the structure of FIG. 4, cut A-A.
Fig. 6 is an isometric view of a compression device according to the present invention.
Fig. 7 is a schematic view of the bottom shaft side of the unlocking device according to the present invention.
Fig. 8 is a schematic axial view of the unlocking device in the unlocking process.
Fig. 9 is an isometric view of a seal ring according to the present invention.
Fig. 10 is a schematic left-hand view of the seal ring of the present invention.
Fig. 11 is a schematic axial view of an impeller according to the present invention.
Fig. 12 is a schematic axial view of the packing element of the present invention.
Wherein, the device comprises a 1-sleeve, a 2-perforation, a 3-compacting device, a 4-rubber cylinder, a 5-central tube, a 6-driving shell, a 7-hydraulic driving impeller, an 8-water inlet one-way valve, a 9-water outlet one-way valve and a 10-side groove, 11-locking collar, 12-locking pin, 13-sealing ring, 14-gear transmission, 401-countersink, 1401-small impeller, 1402-connecting device, 1403-transmission rod, 1404-first gear, 1405-second gear.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Example 1
Referring to fig. 2-12, the embodiment provides a multi-aquifer hydraulic driving spiral self-sealing packing device for a deep geothermal well, which comprises a central pipe 5, wherein the central pipe 5 sequentially penetrates through the axes of a driving device, a pressing device 3, a rubber cylinder 4 and an unlocking device from top to bottom.
The driving device comprises a driving shell 6, a hydraulic driving impeller 7 is arranged in the driving shell 6, the hydraulic driving impeller 7 and the driving shell 6 are coaxially arranged, and the hydraulic driving impeller 7 is in threaded fit connection with the outer wall of the central tube 5 through a self-locking nut; at least one water inlet one-way valve 8 is arranged at the top of the driving shell 6, and at least one water outlet one-way valve 9 is arranged at the lower part of the driving shell 6; the driving shell 6 is in rotary sealing connection with the central tube 5; the bottom surface of the driving housing 6 is in contact with the upper surface of the pressing device 3.
The pressing device 3 is positioned between the driving device and the rubber cylinder 4, a vertical first connecting hole is formed in the axis of the pressing device 3, and the central tube 5 penetrates through the first connecting hole in the axis of the pressing device 3 and is in sliding connection with the pressing device 3; specifically, the compressing device 3 has an inverted truncated cone structure; the lower surface of the pressing device 3 is contacted with the top of the rubber cylinder 4; the rubber cylinder 4 is of a washer-shaped structure made of high temperature and high pressure resistant elastic materials, a second connecting hole is formed in the axis of the rubber cylinder 4 and is in sliding sealing connection with the central tube 5, the center of the top of the rubber cylinder 4 is sunken downwards to form a sinking groove 401, and the opening area of the sinking groove 401 is slightly larger than the lower surface area of the pressing device 3 and is smaller than the upper surface area of the pressing device 3. Thus, when the packing device 3 extrudes the rubber cylinder 4, the radial deformation of the rubber cylinder 4 can be promoted; the circumferential side surface of the rubber cylinder 4 is recessed inwards to form at least one side groove 10, the side groove 10 is spirally arranged, and the structure of the side groove 10 enables the rubber cylinder 4 to have a spring-like shape, so that radial deformation of the rubber cylinder 4 can be further promoted. Thus, under the action of the water pressure, the hydraulic driving impeller 7 moves along with the whole driving device towards the direction of the rubber cylinder 4 through the pressing device 3 and generates pressure on the rubber cylinder 4, and under the pressure of the driving device, the deformation along the radial direction of the central tube 5 is generated, which is the action of blocking the outer sleeve.
The unlocking means comprises a locking clip 11, a locking pin 12 and a gear transmission 14; one end of the locking clamp 11 is hinged, the other end is a free opening and closing end, the central tube 5 penetrates through the locking clamp 11, and a sealing ring 13 is arranged on the contact surface of the locking clamp 11 and the central tube 5 to play a role in sealing. The ball end of the locking pin 12 is rotationally connected with one side of the free opening and closing end, and the other end of the locking pin 12 passes through the other side of the free opening and closing end and is clamped on the side end surface of the locking clamp 11 to lock the free opening and closing end of the locking clamp 11; the gear transmission device 14 comprises a transmission rod 1403 and a connecting device 1402, wherein one end of the transmission rod 1403 is provided with a small impeller 1401, the other end of the transmission rod 1403 is provided with a first gear 1404, and the connecting device 1402 is provided with two second gears 1405 which are opposite up and down; the small impeller 1401 is positioned in the central tube 5, the first gear 1404 is meshed with the two second gears 1405, and the end parts of the connecting devices 1402 are connected with the spherical ends of the locking pins 12; when water is injected into the central tube 5, the small impeller 1401 is driven to rotate, and then the ball end of the locking pin 12 is driven to rotate through the gear transmission device 14, the other end of the locking pin 12 clamped on the side end surface of the locking clamp 11 rotates out of the free opening and closing end, so that the locking clamp 11 slides downwards from the central tube 5, and the unlocking effect is realized.
Example 2
Referring to fig. 1-12, the present embodiment provides a water intake device based on the packing device described in embodiment 1, which includes a casing 1, wherein a plurality of perforations 2 are uniformly arranged on a circumferential side surface of the casing 1, and temporary blocking blocks are filled in the perforations 2, and are made of degradable polyurethane; the central tube 5 is arranged in the sleeve 1, and the sleeve 1 is sealed or unsealed through radial deformation of the rubber sleeve 4 along the central tube 5. The dissolution rate of the temporary plugging block can be selected according to the actual temperature of geothermal water and the actual construction progress, in the embodiment, the temporary plugging block is dissolved in 3-7 days, when the temporary plugging block is dissolved to be smaller than the diameter of the perforation 2, the temporary plugging block falls off from the perforation 2, and at the moment, geothermal water flows into the sleeve 1 from the perforation 2, and the geothermal water can be taken in through the central tube 5.
Example 3
Referring to fig. 1 to 12, the present embodiment proposes a water intake method using the water intake device described in embodiment 2, specifically comprising the following steps:
(1) And (3) casing: using temporary plugging blocks to plug the perforation 2, using degradable polyurethane to plug the bottom of the sleeve 1, and lowering the sleeve 1 into a geothermal well;
(2) Preparing a packing device: the unlocking device, the rubber cylinder 4, the compacting device 3 and the driving device of the packing device are sequentially connected to the central tube 5, and the central tube 5 with the packing device is lowered into the sleeve 1;
(3) And (3) packing: sealing the top of the geothermal well, injecting water into the casing 1 for pressurization, enabling water to enter the driving shell 6 through the water inlet one-way valve 8, enabling the hydraulic driving impeller 7 to rotate through water flow impact, enabling the driving device to rotate downwards along the central tube 5, extruding the compressing device 3, extruding the rubber cylinder 4 between the compressing device 3 and the unlocking device, and enabling the waist of the rubber cylinder 4 to protrude outwards to be in tight contact with the inner wall of the casing 1 so as to seal the casing 1;
(4) Perforation penetration: after the sleeve 1 is put in for 3-7 days, temporarily blocking the sleeve to dissolve, and water in the water-containing layer enters the sleeve 1;
(5) Taking water: taking water from the water in the casing pipe 1 at the lower side of the packing device through the central pipe 5;
(6) Deblocking: after the water taking work is finished, the top of the geothermal well is sealed again, water is injected into the central tube 5 to pressurize, under the action of the pressure in the well, the small impeller 1401 in the central tube 5 rotates, the small impeller 1401 drives the gear transmission device 14, and then the locking pin 12 rotates, when the locking pin 12 rotates out of the locking clamp 11, the locking pin 12 rotates by more than 90 degrees, the unlocking device slides downwards from the central tube 5 and is clamped at the tail end of the central tube 5, the rubber cylinder 4 is restored, and the plugging of the sleeve 1 is relieved.
While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the invention pertains without departing from the scope of the invention defined by the appended claims.
Claims (10)
1. The multi-aquifer packing device for the deep geothermal well is characterized by comprising a central pipe (5), wherein the central pipe (5) sequentially penetrates through the axes of a driving device, a rubber cylinder (4) and an unlocking device from top to bottom;
the driving device is movably connected with the outer wall of the central tube (5), the driving device is provided with a hydraulic driving impeller (7), the hydraulic driving impeller (7) is in threaded fit connection with the outer wall of the central tube (5) through a self-locking nut, under the action of water pressure, the hydraulic driving impeller (7) moves along with the whole driving device in the direction of the rubber cylinder (4) and generates pressure on the rubber cylinder (4), the rubber cylinder (4) is made of elastic materials, and radial deformation along the central tube (5) is generated under the pressure of the driving device;
the unlocking device comprises a locking clamp (11), a locking pin (12) and a gear transmission device (14); one end of the locking clamp (11) is hinged, the other end of the locking clamp is a free opening and closing end, the central tube (5) penetrates through the locking clamp (11), the ball end of the locking pin (12) is rotationally connected with one side of the free opening and closing end, and the other end of the locking pin (12) penetrates through the other side of the free opening and closing end and is clamped on the side end face of the locking clamp (11) to lock the free opening and closing end of the locking clamp (11); the gear transmission device (14) comprises a transmission rod (1403) and a connecting device (1402), wherein a small impeller (1401) is arranged at one end of the transmission rod (1403), a first gear (1404) is arranged at the other end of the transmission rod, and a second gear (1405) is arranged on the connecting device (1402); the small impeller (1401) is positioned in the central tube (5), the first gear (1404) is meshed with the second gear (1405), and the end part of the connecting device (1402) is connected with the spherical end of the locking pin (12); when fluid is injected into the central tube (5), the small impeller (1401) is driven to rotate, and then the spherical end of the locking pin (12) is driven to rotate through the gear transmission device (14), the locking pin (12) is clamped at the other end of the side end face of the locking clamp (11) to rotate out of the free opening and closing end, and the locking clamp (11) slides downwards from the central tube (5).
2. The multi-aquifer packing device of the deep geothermal well according to claim 1, further comprising a compressing device (3), wherein the compressing device (3) is located between the driving device and the rubber cylinder (4), and the central tube (5) penetrates through the axle center of the compressing device (3) and is slidably connected with the compressing device (3).
3. The multi-aquifer packing device of the deep geothermal well according to claim 2, wherein the compressing device (3) has an inverted truncated cone structure; the upper surface of the pressing device (3) is contacted with the bottom surface of the driving device, and the lower surface of the pressing device (3) is contacted with the top of the rubber cylinder (4); the top center of the rubber cylinder (4) is sunken downwards to form a sinking groove (401), and the opening area of the sinking groove (401) is larger than the lower surface area of the pressing device (3) and smaller than the upper surface area of the pressing device (3).
4. A multi-aquifer packing device of a deep geothermal well according to claim 3, wherein the driving device comprises a driving housing (6), a hydraulic driving impeller (7) is arranged inside the driving housing (6), at least one water inlet check valve (8) is arranged at the top of the driving housing (6), and at least one water outlet check valve (9) is arranged at the lower part of the driving housing (6); the driving shell (6) is in rotary sealing connection with the central tube (5); the bottom surface of the driving shell (6) is contacted with the upper surface of the pressing device (3).
5. The multi-aquifer packing device of the deep geothermal well according to claim 1, wherein the rubber cylinder (4) is of a washer-shaped structure, a connecting hole is arranged at the axle center of the rubber cylinder (4), and the connecting hole is in sliding sealing connection with the central tube (5); the circumferential side surface of the rubber cylinder (4) is recessed inwards to form at least one side groove (10), and the side groove (10) is spirally arranged.
6. A multi-aquifer packing device for deep geothermal wells according to claim 1, wherein a sealing ring (13) is provided on the contact surface of the locking clip (11) and the central tube (5).
7. The water taking device based on the multi-aquifer packing device of the deep geothermal well as claimed in any one of claims 1-6, which is characterized by comprising a sleeve (1), wherein perforations (2) are arranged on the circumferential side surface of the sleeve (1), temporary plugging blocks are filled in the perforations (2), and the temporary plugging blocks are made of water-soluble materials; the central tube (5) is arranged in the sleeve (1), and the sleeve (1) is sealed or unsealed through radial deformation of the rubber cylinder (4) along the central tube (5).
8. The water taking device based on the multi-aquifer packing device of the deep geothermal well according to claim 7 is characterized in that a plurality of perforations (2) are uniformly distributed on the sleeve (1); the dissolution rate of the temporary plugging block is selected according to the actual temperature of the geothermal water and the actual construction progress.
9. A water intake method using a water intake device based on a multi-aquifer packing device of a deep geothermal well as defined in claim 7, comprising the steps of:
1) And (3) casing: plugging the perforation (2) by using a temporary plugging block, plugging the bottom of the casing (1), and lowering the casing (1) into a geothermal well;
2) Preparing a packing device: the unlocking device, the rubber cylinder (4) and the driving device of the packing device are sequentially connected to the central tube (5), and the central tube (5) with the packing device is lowered into the sleeve (1);
3) And (3) packing: sealing the top of the geothermal well, injecting water into the casing (1) to pressurize, and driving the impeller (7) to rotate by water flow impact, wherein the driving device downwards rotates along the central tube (5) to extrude the rubber cylinder (4), and the waist of the rubber cylinder (4) protrudes outwards to be in close contact with the inner wall of the casing (1) so as to seal the casing (1);
4) Perforation penetration: after the sleeve (1) is put in, the temporary blocking block is dissolved, and water in the water-containing layer enters the sleeve (1);
5) Taking water: taking water from the water in the sleeve (1) at the lower side of the packing device through the central pipe (5);
6) Deblocking: after water taking work is completed, the top of the geothermal well is sealed again, water is injected into the central tube (5) to pressurize, under the action of pressure in the well, the small impeller (1401) in the central tube (5) rotates, the small impeller (1401) drives the gear transmission device (14) to further enable the locking pin (12) to rotate, when the locking pin (12) rotates out of the locking clamp (11), the unlocking device slides downwards from the central tube (5) and is clamped at the tail end of the central tube (5), the rubber cylinder (4) is restored, and the plugging of the sleeve (1) is relieved.
10. The water taking method adopting the water taking device based on the deep geothermal well multi-aquifer packing device according to claim 9, wherein the pressing device (3) is arranged between the driving device and the rubber cylinder (4), and the rubber cylinder (4) is extruded by the pressing device (3) when the driving device rotates downwards along the central tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664411.XA CN116398082B (en) | 2023-06-07 | 2023-06-07 | Multi-aquifer packing device, water taking device and water taking method for deep geothermal well |
Applications Claiming Priority (1)
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| CN116398082A (en) | 2023-07-07 |
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