CN214697769U - Same-well same-layer mining and irrigating well body structure - Google Patents
Same-well same-layer mining and irrigating well body structure Download PDFInfo
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- CN214697769U CN214697769U CN202120674101.2U CN202120674101U CN214697769U CN 214697769 U CN214697769 U CN 214697769U CN 202120674101 U CN202120674101 U CN 202120674101U CN 214697769 U CN214697769 U CN 214697769U
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- 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 discloses a same well is with layer well body structure of irritating that adopts belongs to geothermal well technical field. This well bore structure includes: the system comprises a water production wellhead device, a suspension recharge composite device, a surface casing, a pump chamber pipe, a production casing, a full-seal hanger, a technical casing, a recharge screen pipe, a water production screen pipe and a heat exchange system; the surface casing is placed and fixed in ground drilling, the pump chamber pipe is connected to the upper portion of the inner side of the surface casing, the top of the pump chamber pipe is connected with the suspension recharging composite device, the top of the suspension recharging composite device is connected with the water production wellhead device, the bottom of the pump chamber pipe is connected with the production casing, the full-sealing hanger is connected to the outer side of the production casing, and the bottom of the production casing is connected with the technical casing. The utility model discloses in broken through traditional adopting and irritated well mode, will exploit and recharge the setting in same eye geothermal well, reduced geothermal well quantity, reduced geothermal well investment, moreover, improve the development and utilization efficiency of geothermal energy, effectively accelerate the construction of geothermal energy capacity.
Description
Technical Field
The utility model relates to a geothermal well technical field, in particular to same well is with layer well body structure of irritating that adopts.
Background
With the increasing environmental protection requirement of China, the initial single open-width well in-line of geothermal wells gradually develops towards the matching direction of environment protection and sustainable resource development. That is, each production well is matched with one or more recharging wells. However, due to the approval system with strict mining right, the development and utilization of geothermal wells are strictly restricted, and according to the related requirements of well position spacing and resource protection, a corresponding recharge well must be built in a block outside the specified spacing of production wells, one well involves multiple neighbors, the mutual right correction is increased without end, and therefore a large amount of manpower and material resources are consumed. Therefore, a need exists for a same-well same-layer production and irrigation well structure.
SUMMERY OF THE UTILITY MODEL
In order to solve the prior art problem, the utility model provides a same well is with layer well body structure of irritating that adopts, include: the system comprises a water production wellhead device, a suspension recharge composite device, a surface casing, a pump chamber pipe, a production casing, a full-seal hanger, a technical casing, a recharge screen pipe, a water production screen pipe and a heat exchange system; the surface casing is fixedly arranged in a ground drilling hole, the upper part of the inner side of the surface casing is connected with the pump chamber pipe, the pump chamber pipe is connected with the suspension recharging composite device, the top of the suspension recharging composite device is connected with the water production wellhead device, the bottom of the pump chamber pipe is connected with the production casing pipe, the fully-sealed hanger is connected with the outer side of the production casing pipe, the technical casing is connected with the periphery of the bottom of the production casing, the recharging sieve tube is arranged at the bottom of the technical casing and corresponds to the recharging layer, the bottom of the technical casing, and the water production sieve tube is arranged below the recharge sieve tube and corresponds to the mining layer, a submersible pump is arranged in the pump chamber tube, the submersible pump is connected with the heat exchange system through a pipeline, an outlet of the water production wellhead device is connected with an inlet of the heat exchange system through a pipeline, and an inlet of the suspension recharge composite device is connected with an outlet of the heat exchange system through a pipeline.
Further, the connection part of the pump chamber pipe and the production casing pipe is connected through a reducing joint.
Furthermore, an external water stop is arranged on the outer side of the technical casing between the mining layer and the recharging layer.
Further, an in-pipe packer is arranged between the production casing and the technical casing between the production level and the recharge level.
Further, a flat gate valve is arranged between the suspension recharge composite device and the water production wellhead device.
Furthermore, the suspension and recharge composite device is connected with the outer convex section on the surface of the surface casing pipe through a connecting flange.
Furthermore, a first valve is arranged on a connecting pipeline between the submersible pump and the heat exchange system.
And furthermore, a second valve is arranged on a connecting pipeline between the outlet of the water production wellhead device and the inlet of the heat exchange system.
Furthermore, a third valve is arranged on a connecting pipeline between the inlet of the suspension recharging composite device and the outlet of the heat exchange system.
The utility model provides a technical scheme's beneficial effect is: the utility model discloses in broken through traditional adopting and irritated well mode, will exploit and recharge the setting in same eye geothermal well, reduced geothermal well quantity, reduced geothermal well investment, moreover, improve the development and utilization efficiency of geothermal energy, effectively accelerate the construction of geothermal energy capacity. In addition, the adopted structure is simple and reliable, the mining layer position and the recharging layer position are switched, a pipe column does not need to be taken out, and the construction period and the maintenance cost are saved.
Drawings
Fig. 1 is an integral structural schematic diagram of a same-well same-layer mining and irrigating well structure provided by the utility model;
fig. 2 is a schematic view of an upper structure of a same-well same-layer mining and irrigating well structure provided by the present invention;
fig. 3 is a schematic view of a lower section structure of a same-well same-layer mining and irrigating well structure provided by the present invention;
fig. 4 is an operation schematic diagram of the same-well same-layer mining and irrigating well structure provided by the utility model.
Reference numerals: 1-a water production wellhead device; 2-flat gate valve; 3-hanging a recharge compound device; 4-a connecting flange; 5-surface casing pipe; 6-pump chamber tube; 7-a reducer union; 8-producing the sleeve; 9-fully sealed hanger; 10-technical casing; 11-recharging the sieve tube; 12-an in-pipe packer; 13-an external water stop; 14-screen for water production; 15-a heat exchange system; 16-a submersible pump; 17-a first valve; 18-a second valve; 19-third valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The use of the terms "upper", "lower", "left", "right" and the like in the present invention is for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1-3, the wellbore construction comprises: the system comprises a water production wellhead device 1, a suspension recharge composite device 3, a surface casing 5, a pump chamber pipe 6, a production casing 8, a full-seal hanger 9, a technical casing 10, a recharge screen 11, a water production screen 14 and a heat exchange system 15; the ground drilling is placed and the surface casing 5 is fixed, the upper part of the inner side of the surface casing 5 is connected with the pump chamber pipe 6, the pump chamber pipe 6 is connected with the suspension recharging composite device 3, the top of the suspension recharging composite device 3 is connected with the water production well head device 1, the bottom of the pump chamber pipe 6 is connected with the production casing 8, the fully-sealed hanger 9 is connected to the outer side of the production casing 8, the peripheral technology casing 10 at the bottom of the production casing 8 is connected with the technical casing 10, the recharging screen 11 is arranged at the bottom of the technical casing 10 and corresponds to the recharging layer, the bottom of the technical casing 10 is connected with the water production screen 14 below the recharging screen 11 and corresponds to the water production layer, the submersible pump chamber pipe 6 is internally provided with the submersible pump 16, the submersible pump 16 is connected with the heat exchange system 15 through a pipeline, the outlet of the water production well head device 1 is connected with the inlet of the heat exchange system 15 through a pipeline, and the inlet of the suspension recharging composite device 3 is connected with the outlet of the heat exchange system 15 through a pipeline.
It should be noted that in the well structure, the surface casing 5 and the technical casing 10, the pump chamber pipe 6 and the production casing 8 form a concentric overlapping structure in series, the central drift diameter is a production through-flow section, and the annular section formed by the two casings is a recharge through-flow section. In addition, the surface casing 5 phi 339.7 multiplied by 9.65mm, the technical casing 10 phi 219.08 multiplied by 8.94mm, the pump chamber pipe 6 phi 244.5mm and the production casing 8 phi 139.7mm, the flow cross-sectional area of the pump chamber and the recharge annulus which are formed by the surface casing 5 and the pump chamber pipe 6 at the upper part are 403.15cm respectively2And 336.6cm2Namely, the flow cross section of the recharge is larger than that of the pump chamber, the large enough recharge annulus is more favorable for the recharge injection of the tail water to avoid the water resistance phenomenon, and the flow cross sections of the recharge annulus and the tail water are far larger than the flow cross section area of 154.4cm of the phi 139.7mm production casing 82. Considering that chemical components in geothermal water can form solids through scaling, when geothermal water pumped by a pump chamber flows back through a heat exchange system, the solids are easy to accumulate and adhere between the end surface of a collar boss of an inner pipe of a circular seam and the inner space of a circular seam with narrow inner diameter of an outer pipe and the outer circle of the collar, so that a passage is blocked, and the settled solids can adhere and deposit on the position of a back-filling screen pipe, so that the back-filling is blocked.
In addition, when the technical casing 10 is put in, the coupling box at the tail end of the technical casing is connected and screwed with the hanging group string core pipe male buckle of the fully-sealed hanger 9, and the technical casing is put down to the hanging position of an open male-female joint, so that the hanging and sealing of the technical casing 10 are realized.
Further, the pump chamber tube 6 is connected to the production casing 8 by a reducer union 7. The problem of different calibers when metal pipelines are connected can be solved.
Further, an external water stop 13 is arranged outside the technical casing 10 between the mining level and the recharge level. After the recharge and production levels are determined from the electrical measurements, an external separator 13 for the recharge and production levels is installed between the technical casing 10 and the wellbore to isolate the passage for production and recharge water from the wellbore.
Further, an in-pipe packer 12 is arranged between the production casing 8 and the technical casing 10 between the production level and the recharge level. When the pump chamber pipe 6 and the production casing pipe 8 are put into the production casing pipe, an in-pipe separator 12 is arranged at a position corresponding to an outside water stop 13 so as to block a passage of the recharge tail water in the recharge annulus and the geothermal water at the water production layer.
Further, a flat gate valve 2 is arranged between the suspension recharge composite device 3 and the water production wellhead device 1. The geothermal water source can be closed when the submersible pump 16 is overhauled, and the flat gate valve 2 can be opened to lower the submersible pump 16 into the pump chamber pipe 6 after the overhaul is finished.
The flat gate valve 2 can be a DN300 flat gate valve, a flange at the lower end of the flat gate valve 2 is connected with the suspended recharge composite device 3 below the flat gate valve, a suspended boss for suspending the pump chamber pipe 6 is reserved at the upper part of an inner cavity of the suspended recharge composite device 3, and a seat seal on the suspended seal assembly is connected with a terminal coupling of the pump chamber pipe 6 through a central core pipe through a screw thread. When the pump chamber pipe 6 is lowered to a designed position, the hanging recharging well mouth cavity diameter and the hanging boss hanging sealing component are seated and sealed to form a sealing bin, and the rubber ring sealed in the bin is pressed by the self weight of the pump chamber pipe 6 and the production casing pipe 8, so that the volume in the bin is continuously reduced, and the rubber ring is forced to deform to contact with the bin wall and to be compressed. When the resistance of the sealing rubber ring is balanced with the weight of the pump chamber pipe production casing pipe string, the pipe string is statically hung at the upper part of the inner cavity of the suspension recharge wellhead and is sealed.
Further, the suspension and recharge composite device 3 is connected with the outer convex section on the ground of the surface layer casing 5 through a connecting flange 4.
Further, a first valve 17 is arranged on a connecting pipeline between the submersible pump 16 and the heat exchange system 15.
Further, a second valve 18 is arranged on a connecting pipeline between the outlet of the water production wellhead device 1 and the inlet of the heat exchange system 15.
Furthermore, a third valve 19 is arranged on a connecting pipeline between the inlet of the suspension recharging composite device 3 and the outlet of the heat exchange system 15.
Referring to fig. 4, the complete workflow of the present invention may be: during operation, geothermal water at the mining layer position flows into the inner cavity of the pump chamber pipe 6 through the production casing pipe 8, the first valve 17 is opened, geothermal water in the pump chamber pipe 6 is conveyed to the heat exchange system 15 for heat exchange through the submersible pump 16, the second valve 18 and the third valve 19 are opened after heat exchange, geothermal tail water after heat exchange flows into the recharging layer position through the annular space between the outer wall of the pump chamber pipe 6 and the surface casing pipe 5 and then enters the space between the production casing pipe 8 and the technical casing pipe 10 and flows into the recharging layer position through the inside of the recharging screen pipe 11.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. The utility model provides a with well same floor adopt irritate well bore structure which characterized in that includes: the system comprises a water production wellhead device (1), a suspension recharge composite device (3), a surface casing (5), a pump chamber pipe (6), a production casing (8), a full-seal hanger (9), a technical casing (10), a recharge screen pipe (11), a water production screen pipe (14) and a heat exchange system (15);
the surface casing pipe (5) is placed and fixed in a ground drilling manner, the upper part of the inner side of the surface casing pipe (5) is connected with the pump chamber pipe (6), the pump chamber pipe (6) is connected with the suspension recharging composite device (3), the top of the suspension recharging composite device (3) is connected with the water production wellhead device (1), the bottom of the pump chamber pipe (6) is connected with the production casing pipe (8), the fully-sealed hanger (9) is connected with the outer side of the production casing pipe (8), the periphery of the bottom of the production casing pipe (8) is connected with the technical casing pipe (10), the bottom of the technical casing pipe (10) is provided with the recharging sieve pipe (11) corresponding to a recharging layer, the bottom of the technical casing pipe (10) is provided with the water production sieve pipe (14) corresponding to a mining layer, and a submersible pump (16) is arranged in the pump chamber pipe (6), the submersible pump (16) is connected with the heat exchange system (15) through a pipeline, an outlet of the water production wellhead device (1) is connected with an inlet of the heat exchange system (15) through a pipeline, and an inlet of the suspension recharge composite device (3) is connected with an outlet of the heat exchange system (15) through a pipeline.
2. A same-well same-layer production and irrigation well bore structure as claimed in claim 1, wherein the connection of the pump chamber pipe (6) and the production casing (8) is connected by a reducer union (7).
3. A same-well same-layer production and recharge well structure according to claim 1, characterized in that an external water stop (13) is arranged outside the technical casing (10) between the production level and the recharge level.
4. A same-well same-layer production-and-recharge well bore structure according to claim 3, characterized in that an in-pipe packer (12) is arranged between the production casing (8) and the technical casing (10) between the production level and the recharge level.
5. The same-well same-layer production and irrigation well bore structure as claimed in claim 1, wherein a flat gate valve (2) is arranged between the suspension recharge compound device (3) and the water production well head device (1).
6. The same-well same-layer production and irrigation well bore structure as defined in claim 1, wherein the suspension and recharge combined device (3) is connected with the outer convex section on the ground surface of the surface casing (6) through a connecting flange (4).
7. The same-well same-layer production and irrigation well bore structure as claimed in claim 1, wherein a first valve (17) is arranged on a connecting pipeline of the submersible pump (16) and the heat exchange system (15).
8. The same-well same-layer mining and irrigating well structure as claimed in claim 7, wherein a second valve (18) is arranged on a connecting pipeline between the outlet of the water production wellhead device (1) and the inlet of the heat exchange system (15).
9. The same-well same-layer production and irrigation well bore structure as claimed in claim 8, wherein a third valve (19) is arranged on a connecting pipeline between an inlet of the suspension recharging composite device (3) and an outlet of the heat exchange system (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120674101.2U CN214697769U (en) | 2021-04-02 | 2021-04-02 | Same-well same-layer mining and irrigating well body structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120674101.2U CN214697769U (en) | 2021-04-02 | 2021-04-02 | Same-well same-layer mining and irrigating well body structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214697769U true CN214697769U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120674101.2U Active CN214697769U (en) | 2021-04-02 | 2021-04-02 | Same-well same-layer mining and irrigating well body structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214697769U (en) |
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2021
- 2021-04-02 CN CN202120674101.2U patent/CN214697769U/en active Active
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