CN220621842U - Layered water pumping test device for middle-deep geothermal well - Google Patents
Layered water pumping test device for middle-deep geothermal well Download PDFInfo
- Publication number
- CN220621842U CN220621842U CN202322373192.8U CN202322373192U CN220621842U CN 220621842 U CN220621842 U CN 220621842U CN 202322373192 U CN202322373192 U CN 202322373192U CN 220621842 U CN220621842 U CN 220621842U
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- pipe
- packer
- pump chamber
- water
- joint
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 238000005086 pumping Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 239000007787 solid Substances 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 6
- 238000005338 heat storage Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- 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 utility model relates to a layered water pumping test device for a middle-deep geothermal well, which comprises a packer, a pump chamber and a protection wall arranged between a well pipe and the inner wall of a borehole, wherein the packer comprises an inner pipe and an outer pipe; in geothermal exploration, the method can solve the problem of sealing in the upper and lower parts of the same-diameter well pipe, and can keep good sealing in the environment of high temperature and high pressure difference; the water pumping test, the recharging test and the water quality sampling can be carried out on the upper layer (the liberal pottery group) or the lower layer (the explicit town group) heat storage independently.
Description
Technical Field
The utility model relates to the technical field of geothermal well pumping, in particular to a layered pumping test device for a middle-deep geothermal well.
Background
The geothermal well layered water pumping test is to study the relation between the water inflow of the well and the water level drop, especially the relation between the water inflow and the water pumping duration; obtaining hydrogeologic parameters of the aquifer and the overflow layer; the shape, the size and the expansion process of the dropping funnel are researched, the waterpower between aquifers and between the aquifers and the surface water body is researched, and the boundary position and the property of the aquifer (or the water body) are determined; simulation of production or drainage is performed to determine these parameters required in designing a well group for well spacing, production drawdown, reasonable well diameter, etc.
The existing shallow layered water stopping equipment is difficult to adapt to the sealing problem under high temperature and high pressure difference, and cannot seal the upper part and the lower part of the same-diameter well pipe in a pipe; therefore, how to overcome the above-mentioned technical problems and drawbacks becomes an important problem to be solved.
Disclosure of Invention
The utility model aims to overcome the defects described in the background art, so as to provide a layered pumping test device for a middle-deep geothermal well, which can solve the problem of sealing in the upper and lower parts of a same-diameter well pipe in geothermal exploration and can keep good sealing in the environment of high temperature and high pressure difference; the water pumping test, the recharging test and the water quality sampling can be carried out on the upper layer (the liberal pottery group) or the lower layer (the explicit town group) heat storage independently.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a well deep geothermal well layering water pumping test device, includes packer, pump chamber and the waterstop of setting between well pipe and borehole wall, the packer includes inner tube and outer tube, and the packer outer tube sets up in well pipe lower part, and inner tube upper portion is connected with the packer joint, and the packer joint is through inlet tube and pump chamber lower part intercommunication, and pump chamber upper portion is through connecing pump flange dish and outlet pipe connection.
Further, the water stop belt comprises an upper water stop section and a lower water stop section, and the inner side of the well pipe at the middle part of the lower water stop section is fixedly connected with the outer pipe of the packer.
Further, the upper portion of the inner side of the outer pipe of the packer is provided with a lower sealing table, the upper portion of the outer side of the inner pipe is provided with an upper sealing table matched with the lower sealing table, the upper sealing table and the lower sealing table are made of metal materials, the hardness of the metal materials of the inner pipe is greater than that of the outer pipe, two sealing grooves are formed in the outer side of the lower portion of the inner pipe, and rubber sealing rings are installed in the sealing grooves and form sealing with the inner wall of the lower section of the outer pipe.
Furthermore, a heat-resistant submersible pump is arranged in the pump chamber, an openable and closable pump chamber window is arranged at the lower part of the pump chamber, and the upper part of the pump chamber is connected with the water outlet pipe through a pump chamber joint.
Further, a cable hole and a water level observation hole are formed in the pump chamber connector, and a water level observation pipe is arranged on the water level observation hole.
Further, a flowmeter is arranged on the water outlet pipe.
Further, the packer joint is a common hollow joint or a solid joint.
The layered pumping test device for the middle-deep geothermal well has the beneficial effects that:
the layered water pumping test device for the middle-deep geothermal well has the advantages of simple structure, easy popularization, reliable water stopping effect through practical verification, and no influence on the later use and maintenance of the well, can simplify the structural design of the well body, shorten the construction period and save the construction cost by designing the outer pipe of the packer and the well pipe into a whole; the inner pipe and the outer pipe of the packer are sealed by adopting metals with different hardness, and the metal seal is matched with the dead weight of equipment to ensure the tightness and is safe and reliable.
Drawings
FIG. 1 is a schematic view of the structure of the utility model when extracting groundwater;
FIG. 2 is a schematic view of the structure of the utility model when extracting the upper water;
FIG. 3 is a schematic illustration of the structure of the packer of the present utility model;
FIG. 4 is a schematic view of the outer tube of the packer of the utility model;
FIG. 5 is a schematic illustration of the structure of the inner pipe of the packer of the present utility model;
in the figure: the device comprises a 1-pump chamber, a 2-heat-resistant submersible pump, a 3-pump chamber window, a 4-upper water stop section, a 5-upper water intake layer, a 6-water stop belt, a 7-lower water intake layer, an 8-packer joint, a 9-packer outer pipe, a 10-packer inner pipe, an 11-well pipe, a 12-water intake pipe, a 13-water outlet pipe, a 14-water level observation pipe, a 15-flowmeter, a 16-rubber sealing ring, a 17-lower sealing table, an 18-upper sealing table and a 19-pump chamber joint.
Detailed Description
The layered pumping test device for the middle-deep geothermal well is described in more detail below by means of specific embodiments in combination with the accompanying drawings.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1-2, the middle-deep geothermal well layered water pumping test device of the embodiment can seal the inside of the pipe at the upper and lower parts of the same diameter well pipe in geothermal exploration, and can keep good sealing under the environment of high temperature and high pressure difference; the water pumping test, the recharging test and the water quality sampling can be carried out on the upper layer (the liberal pottery group) or the lower layer (the explicit town group) heat storage independently.
In this embodiment, see fig. 1-5 in detail, the well casing comprises a packer, a pump chamber 1 and a water stop arranged on the outer side of the well casing 11, the water stop comprises an upper water stop section 4 and a lower water stop section 5, the well casing 11 corresponding to the water stop 6 in the middle of the lower water stop section 5 is fixedly connected with the outer pipe 9 of the packer, the outer pipe 9 of the packer and the outer pipe 11 are designed into a whole, and during installation, the inner pipe 10 is directly placed into the outer pipe 9 to be properly pressurized to complete the installation, so that the structural design of a well body is simplified, the construction period is shortened, the construction cost is saved, the later use and maintenance of a well are not influenced, and the well casing is very convenient.
In this embodiment, see fig. 3-5 in detail, the packer includes inner tube 10 and outer tube 9, the inboard upper portion of outer tube 9 of packer is provided with down sealing platform 17, the outside upper portion of inner tube 10 is provided with and seals platform 17 assorted last sealing platform 18 down, inner tube 10 and outer tube 9 are the metal material, the metal material hardness of inner tube 10 is greater than outer tube 9, utilize the dead weight of inner tube 10 upper portion junction device to push down, with upper and lower sealing platform closely compress tightly together, two seal grooves have been seted up in the lower part outside of inner tube 10, install rubber seal ring 16 in the seal groove, further promote the leakproofness between the inner tube.
In the embodiment, as shown in fig. 1-2 in detail, the outer pipe 9 of the packer is fixed at the position corresponding to the water stop belt 6 at the lower part of the well pipe 11, the upper part of the inner pipe 10 is connected with the water inlet pipe through the packer joint 8, the packer joint 8 is a common hollow joint or a solid joint, the common hollow joint is arranged when the lower water layer is taken, the solid joint is arranged when the upper water layer is taken, and the independent water pumping of the upper water layer and the lower water layer is realized through the conversion of different joints, so that the device is very convenient; the upper part of the packer joint 8 is communicated with the lower part of the pump chamber 1 through a water inlet pipe 12, a heat-resistant submersible pump 2 is arranged in the pump chamber 1, an openable and closable pump chamber window 3 is arranged at the lower part of the pump chamber 1, and the pump chamber window 3 is matched with the packer joint 8 for use, so that independent pumping of upper water and lower water is realized; the upper part of the pump chamber 1 is provided with a pump chamber joint, a cable hole and a water level observation hole are formed in the pump chamber joint, a water level observation pipe 14 is arranged on the water level observation hole, the upper part of the pump chamber 1 is connected with a water outlet pipe 13 through a pump connecting flange plate, and a flowmeter 15 is arranged on the water outlet pipe 13.
Working principle:
1. and after drilling is completed, the well arranged well pipes are put in, and the outer pipe of the packer is arranged between the well pipes corresponding to the water stop section and is put in together with the well pipes.
2. The pellets and the clay balls are put into the outside of the well pipe according to the design to stop water, so that a water stop belt is formed, if the lower part of the well pipe is plugged by a water stop umbrella without putting the pellets below a packer, the clay balls and the pellets are put into the upper part to form a well, and the basic operation is to finish layered water stop outside the well pipe.
3. After well flushing is finished, the inner pipe of the packer and the connected pumping device are put down according to the requirement.
4. Firstly, a water pumping experiment of a mixed layer is carried out, then, a water pumping experiment of an upper part (for example, an explicit town group) is carried out, at the moment, a lower water-bearing layer needs to be sealed, and the water is introduced into a well pipe from bottom to top: the inner pipe of the packer, the solid joint, the water inlet pipe and the pump chamber (the pump chamber window is opened) +the water outlet pipe (the water level observation pipe is arranged in parallel) +the flowmeter, the lower connection of the water outlet pipe is connected by screw threads, the solid joint is matched with the packer to separate upper layer water and lower layer water, the solid joint can be arranged at any position between the pump chamber and the packer, the upper layer water enters the pump chamber through the pump chamber window, and the independent extraction of the upper layer water is realized.
5. The practice proves that the structure has good sealing effect, high temperature resistance, high connection strength, good sealing performance, safety and reliability.
6. The facilities that lower floor (for example, the liberal pottery group) water pumping test goes into from bottom to top have: the packer seals the upper water and the lower water, prevents the upper water from entering the lower water, and the lower water enters the pump chamber through the inner pipe and the water inlet pipe of the packer, so that the lower water is independently extracted, and the packer has good sealing performance, safety and reliability and achieves the aim of layered pumping test through practical verification.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, whether direct or indirect.
While the exemplary embodiments of the present utility model have been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that many changes and modifications can be made to the specific embodiments described above without departing from the spirit of the utility model, and that many combinations of technical features and structures can be made without departing from the scope of the utility model.
Claims (7)
1. The utility model provides a well deep geothermal well layering test device that draws water, includes packer, pump chamber and sets up the waterstop in the well pipe outside, its characterized in that: the packer comprises an inner pipe and an outer pipe, the outer pipe of the packer is arranged at the lower part of the well pipe, the upper part of the inner pipe is connected with a packer joint, the packer joint is communicated with the lower part of a pump chamber through a water inlet pipe, and the upper part of the pump chamber is connected with a water outlet pipe through a pump connecting flange plate.
2. The device for testing the stratified pumping of the middle-deep geothermal well according to claim 1 is characterized in that: the water stop belt comprises an upper water stop section and a lower water stop section, and the inner side of a well pipe at the middle part of the lower water stop section is fixedly connected with the outer pipe of the packer.
3. The stratified pumping test device for the mid-deep geothermal well according to claim 1 or 2, wherein: the outer pipe of packer is inboard upper portion is provided with down sealing platform, and the outside upper portion of inner tube is provided with sealing platform under with sealing platform assorted, and upper and lower sealing platform is the metal material, and the metal material hardness of sealing platform is greater than sealing platform down, and the inner tube lower part outside is provided with the rubber sealing ring.
4. The device for testing the stratified pumping of the middle-deep geothermal well according to claim 1 is characterized in that: the heat-resistant submersible pump is arranged in the pump chamber, the lower part of the pump chamber is provided with a pump chamber window which can be opened and closed, and the upper part of the pump chamber is connected with the water outlet pipe through a pump chamber joint.
5. The stratified pumping test device for the middle-deep geothermal well according to claim 4 is characterized in that: and a cable hole and a water level observation hole are formed in the pump chamber joint, and a water level observation pipe is arranged on the water level observation hole.
6. The device for testing the stratified pumping of the middle-deep geothermal well according to claim 1 is characterized in that: and a flowmeter is arranged on the water outlet pipe.
7. The device for testing the stratified pumping of the middle-deep geothermal well according to claim 1 is characterized in that: the packer joint is a common hollow joint or a solid joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322373192.8U CN220621842U (en) | 2023-09-01 | 2023-09-01 | Layered water pumping test device for middle-deep geothermal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322373192.8U CN220621842U (en) | 2023-09-01 | 2023-09-01 | Layered water pumping test device for middle-deep geothermal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220621842U true CN220621842U (en) | 2024-03-19 |
Family
ID=90219335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322373192.8U Active CN220621842U (en) | 2023-09-01 | 2023-09-01 | Layered water pumping test device for middle-deep geothermal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220621842U (en) |
-
2023
- 2023-09-01 CN CN202322373192.8U patent/CN220621842U/en active Active
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