CN114458243A - Scale inhibitor filling system - Google Patents
Scale inhibitor filling system Download PDFInfo
- Publication number
- CN114458243A CN114458243A CN202011240395.4A CN202011240395A CN114458243A CN 114458243 A CN114458243 A CN 114458243A CN 202011240395 A CN202011240395 A CN 202011240395A CN 114458243 A CN114458243 A CN 114458243A
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- CN
- China
- Prior art keywords
- scale inhibitor
- pipe
- pump
- filling system
- scale
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 124
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Fluid Mechanics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a scale inhibitor filling system.A scale inhibitor conveying pipeline is partially arranged outside a pump pipe in a well and is fixed by the pump pipe, so that the problems of vibration and abrasion caused by installation in the pump pipe are solved, and the safe and stable operation of the scale inhibitor filling system is ensured. The scale inhibitor conveying pipeline is connected with a geothermal well flange through a movable joint, so that a pump can be conveniently lifted, the scale inhibitor conveying pipeline can be conveniently installed, and meanwhile, the scale inhibitor conveying pipeline is easily collected on a winch. The scale inhibitor liquid distribution pipe is annular and is provided with a plurality of scale inhibitor filling branch pipes, so that the filling uniformity is ensured, and the problem that a single branch pipe is easy to block is solved. The scale inhibitor filling branch pipes are arranged along the water flow direction and form an included angle of 30-60 degrees with the water flow direction, so that solid particles in the water flow can be prevented from blocking the scale inhibitor filling branch pipes.
Description
Technical Field
The invention relates to the technical field of geothermal heating, in particular to a scale inhibitor filling system.
Background
In North China, the haze is severe in winter, and the demand on clean energy heating technology is urgent. The karst geothermal energy storage of the area is rich, the development and utilization degree is high, and a feasible solution is provided for clean energy heating. In the development process of karst heat storage, the scale formation of underground calcium carbonate is common, and the greater effect of geothermal heating is restricted. The downhole scaling is more prominent in the scaling in the pump pipe, which affects the flow cross section of the pump pipe. During heating, scaling is removed in a mechanical mode, and a deep-well pump and a pump pipe need to be provided, so that heating is affected. The traditional filling scale inhibitor is used for removing scale, a filling pipeline is arranged in a pump pipe, and the filling pipeline is easy to vibrate and wear due to the high flow velocity of water in the pump pipe and has poor safety and stability.
Disclosure of Invention
The invention provides a scale inhibitor filling system in order to solve calcium carbonate scaling in a well and ensure the safe and stable operation of a scale inhibition system.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a scale inhibitor filling system comprises a pump chamber pipe which is deep underground for operation, wherein a deep-well pump is arranged in the pump chamber pipe, one end of the pump pipe is connected to the deep-well pump, the pump pipe extends upwards and partially extends out of the pump chamber pipe, and the other end of the pump pipe is fixed at the upper end of the pump chamber pipe; the scale inhibitor feeding device is characterized in that a scale inhibitor liquid distribution pipe is arranged on the pump pipe, a plurality of scale inhibitor feeding branch pipes are arranged on the scale inhibitor liquid distribution pipe along the circumferential direction of the pump pipe, and the scale inhibitor liquid distribution pipe is communicated with a scale inhibitor box for supplying scale inhibitors through a scale inhibitor conveying pipeline.
The scale inhibitor filling system is characterized in that the pump pipe is fixed at the upper end of the pump chamber pipe through a geothermal well flange, and the scale inhibitor conveying pipeline is connected with the geothermal well flange through a movable joint.
The scale inhibitor filling system is characterized in that the scale inhibitor filling branch pipe is connected with the pump pipe in a welding mode.
The scale inhibitor filling system is characterized in that one end of the scale inhibitor conveying pipeline arranged on the ground is connected with a movable joint on a geothermal well flange, and the other end of the scale inhibitor conveying pipeline is connected with a pipeline communicated with a scale inhibitor box.
The scale inhibitor filling system is characterized in that a winch, a regulating valve, a flow meter, a metering pump and a shut-off valve are arranged on a pipeline communicated with the scale inhibitor tank.
The scale inhibitor filling system is characterized in that a liquid level meter is arranged on the side surface of the scale inhibitor box body.
The scale inhibitor filling system is characterized in that the scale inhibitor liquid distribution pipe is annular, and four scale inhibitor filling branch pipes are arranged on the annular.
The scale inhibitor filling system is characterized in that the scale inhibitor filling branch pipe is obliquely and upwards inserted into the pump pipe, and the vertical included angle between the scale inhibitor filling branch pipe and the pump pipe is 30-60 degrees.
The scale inhibitor filling system is characterized in that the scale inhibitor conveying pipeline is partially arranged outside the pump pipe in the well and is fixed through the pump pipe.
The scale inhibitor filling system is characterized in that the scale inhibitor conveying pipeline is connected with a geothermal well flange through a movable joint.
Compared with the prior art, the invention has the beneficial effects that: the scale inhibitor conveying pipeline is partially arranged outside the pump pipe in the well and is fixed through the pump pipe, so that the problems of vibration and abrasion caused by installation in the pump pipe are solved, and the safe and stable operation of a scale inhibitor filling system is ensured. The scale inhibitor conveying pipeline is connected with a geothermal well flange through a movable joint, so that a pump can be conveniently lifted, the scale inhibitor conveying pipeline can be conveniently installed, and meanwhile, the scale inhibitor conveying pipeline is easily collected on a winch. The scale inhibitor liquid distribution pipe is annular and is provided with a plurality of scale inhibitor filling branch pipes, so that the filling uniformity is ensured, and the problem that a single branch pipe is easy to block is solved. The scale inhibitor filling branch pipes are arranged along the water flow direction and form an included angle of 30-60 degrees with the water flow direction, so that solid particles in the water flow can be prevented from blocking the scale inhibitor filling branch pipes.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a scale inhibitor filling system provided in an embodiment of the present invention.
In the figure, 1, a geothermal well flange; 2. a pump tube; 3. a pump chamber tube; 4. filling the scale inhibitor into the branch pipe; 5. a deep well pump; 6. a scale inhibitor liquid separating pipe; 7. a movable joint; 8. a scale inhibitor transport line; 9. a winch; 10. adjusting a valve; 11. a metering pump; 12. closing the valve; 13. a scale inhibitor box body; 14. a liquid level meter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example (b):
it should be noted that the terms "comprises" and "comprising," and any variations thereof, of embodiments of the present invention are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a scale inhibitor filling system provided in an embodiment of the present invention. In order to solve the calcium carbonate scaling in the well and ensure the safe and stable operation of the scale inhibition system, the invention provides a scale inhibitor filling system, which comprises a pump chamber pipe 3 which is deep into the underground operation, wherein a deep well pump 5 is arranged in the pump chamber pipe 3, one end of a pump pipe 2 is connected to the deep well pump 5, the pump pipe 2 extends upwards and partially extends out of the pump chamber pipe 3, and the other end of the pump pipe 2 is fixed at the upper end of the pump chamber pipe 3; the scale inhibitor feeding device is characterized in that a scale inhibitor liquid distributing pipe 6 is arranged on the pump pipe 2, a plurality of scale inhibitor feeding branch pipes 4 are arranged on the scale inhibitor liquid distributing pipe 6 along the circumferential direction of the pump pipe 2, and the scale inhibitor liquid distributing pipe 6 is communicated with a scale inhibitor box for supplying scale inhibitor through a scale inhibitor conveying pipeline 8. Specifically, the pump chamber tube 3 has a diameter of 406mm and a depth of 400 m. The depth of the deep-well pump 5 is 260 meters, and the diameter of the pump pipe 2 is 159 mm. The fouling location is located in the pump pipe 2 at a position of 40m downhole. The scale inhibitor filling position is 200m underground.
As an alternative embodiment, in some embodiments, the pump pipe 2 is fixed on the upper end of the pump chamber pipe 3 by a geothermal well flange 1, and the antisludging agent conveying pipeline 8 is connected with the geothermal well flange 1 by a movable joint 7.
As an alternative embodiment, in some embodiments, the antisludging agent filling branch pipe 4 is connected with the pump pipe 2 by welding.
As an alternative embodiment, in some embodiments, the antisludging agent delivery line 8 arranged on the ground is connected at one end to the union 7 on the geothermal well flange 1 and at the other end to a pipe communicating with an antisludging agent tank.
As an alternative embodiment, in some embodiments, the pipeline communicated with the antisludging agent tank is provided with a winch 9, a regulating valve 10, a flow meter, a metering pump 11 and a shut-off valve 12. The amount of scale inhibitor added is controlled by regulating valve 10. When the scale inhibitor is filled, the metering pump 11 is started, and the consumption of the scale inhibitor is calculated according to the reading change of the liquid level meter 14.
As an alternative embodiment, in some embodiments, the antisludging agent box 13 is provided with a liquid level meter 14 on the side. The liquid level meter 14 with a scale can display the liquid level and measure the flow of the scale inhibitor. The liquid level meter 14 with the scale is adopted to measure the flow of the scale inhibitor, and the method is simple, convenient to operate, low in cost and high in precision.
As an optional implementation manner, in some embodiments, the scale inhibitor liquid distribution pipe 6 is a circular ring with a diameter of 6mm, four scale inhibitor filling branch pipes 4 are arranged on the circular ring, and the four scale inhibitor filling branch pipes 4 are arranged, so that on one hand, the scale inhibitor is uniformly filled, and on the other hand, the blockage of a single branch pipe is prevented.
As an alternative implementation manner, in some embodiments, the diameter of the antisludging agent filling branch pipe 4 is 6mm, and the antisludging agent filling branch pipe 4 is inserted into the pump pipe 2 obliquely upwards and forms an included angle of 30-60 degrees, preferably 45 degrees with the pump pipe 2 in the vertical direction. The scale inhibitor filling branch pipe 4 is along the water flow direction and has an included angle of 45 degrees with the water flow direction, so that solid particles in the water flow can be prevented from blocking the scale inhibitor filling branch pipe 4.
As an alternative embodiment, in some embodiments, the scale inhibitor delivery line 8 is disposed partially outside the pump tubing 2 downhole and is secured by the pump tubing 2. The scale inhibitor conveying pipeline 8 is 6mm in diameter and made of 316L. In the downhole part, a scale inhibitor transport line 8 is arranged outside the pump pipe 2 and fixed by the pump pipe 2. The underground scale inhibitor conveying pipeline 8 is arranged outside the pump pipe 2, so that the problems of vibration and abrasion can be solved, and the safe and stable operation of a scale inhibitor filling system is ensured.
As an alternative embodiment, in some embodiments, the scale inhibitor transport line 8 is connected to the geothermal well flange 1 by a union 7. The scale inhibitor conveying pipeline 8 is connected with the geothermal well flange 1 through the movable joint 7, and when the pump and the pump pipe 2 are lifted and the scale inhibitor conveying pipeline 8 is installed, the geothermal well flange 1 is separated from the scale inhibitor conveying pipeline 8 through the movable joint 7. After the geothermal well flange 1 is separated from the scale inhibitor conveying pipeline 8, the scale inhibitor conveying pipeline 8 on the upper portion of the flange and the scale inhibitor conveying pipeline 8 on the lower portion of the flange can be connected together through screw threads, and the scale inhibitor conveying pipeline 8 can be conveniently collected on a winch 9. The diameter of the capstan 9 is 500 mm.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A scale inhibitor filling system comprises a pump chamber pipe which is deeply operated underground, and is characterized in that a deep-well pump is arranged in the pump chamber pipe, one end of the pump pipe is connected to the deep-well pump, the pump pipe extends upwards and partially extends out of the pump chamber pipe, and the other end of the pump pipe is fixed at the upper end of the pump chamber pipe; the scale inhibitor feeding device is characterized in that a scale inhibitor liquid distribution pipe is arranged on the pump pipe, a plurality of scale inhibitor feeding branch pipes are arranged on the scale inhibitor liquid distribution pipe along the circumferential direction of the pump pipe, and the scale inhibitor liquid distribution pipe is communicated with a scale inhibitor box for supplying scale inhibitors through a scale inhibitor conveying pipeline.
2. The scale inhibitor filling system of claim 1, wherein the pump pipe is fixed at the upper end of the pump chamber pipe by a geothermal well flange, and the scale inhibitor delivery line is connected with the geothermal well flange by a union.
3. The scale inhibitor filling system according to claim 1, wherein the scale inhibitor filling branch pipe is connected with the pump pipe by welding.
4. The scale inhibitor filling system according to claim 1, wherein one end of the scale inhibitor conveying pipeline arranged on the ground is connected with a movable joint on a geothermal well flange, and the other end of the scale inhibitor conveying pipeline is connected with a pipeline communicated with a scale inhibitor box.
5. The system of claim 4, wherein the pipe connected to the antisludging agent tank is provided with a winch, a regulating valve, a flow meter, a metering pump and a shut-off valve.
6. The scale inhibitor filling system of claim 4, wherein the scale inhibitor tank is equipped with a level gauge on the side.
7. The scale inhibitor filling system according to claim 1, wherein the scale inhibitor liquid distribution pipe is annular, and four scale inhibitor filling branch pipes are arranged on the annular.
8. The scale inhibitor filling system of claim 1, wherein the scale inhibitor filling branch pipe is inserted into the pump pipe obliquely upwards, and the vertical included angle between the scale inhibitor filling branch pipe and the pump pipe is 30-60 degrees.
9. The scale inhibitor filling system of claim 1, wherein the scale inhibitor transport line is partially disposed outside the pump pipe downhole and is fixed by the pump pipe.
10. The scale inhibitor filling system of claim 1, wherein the scale inhibitor delivery line is connected to a geothermal well flange by a union.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011240395.4A CN114458243A (en) | 2020-11-09 | 2020-11-09 | Scale inhibitor filling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011240395.4A CN114458243A (en) | 2020-11-09 | 2020-11-09 | Scale inhibitor filling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114458243A true CN114458243A (en) | 2022-05-10 |
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ID=81404478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011240395.4A Pending CN114458243A (en) | 2020-11-09 | 2020-11-09 | Scale inhibitor filling system |
Country Status (1)
| Country | Link |
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| CN (1) | CN114458243A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2462587C1 (en) * | 2011-11-17 | 2012-09-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of operation of oil-producing high-temperature well |
| CN202752281U (en) * | 2012-08-20 | 2013-02-27 | 陈建平 | Pipeline built-in automatic input device of terrestrial heat scale inhibitors |
| US20150369229A1 (en) * | 2014-06-19 | 2015-12-24 | Saudi Arabian Oil Company | Downhole Chemical Injection Method and System for Use in ESP Applications |
| CN206753550U (en) * | 2017-05-12 | 2017-12-15 | 西南石油大学 | A kind of oil field industrial water ring generating apparatus |
| CN207260975U (en) * | 2017-09-19 | 2018-04-20 | 中国石油天然气集团公司 | A kind of oil field back washing device |
| CN110056330A (en) * | 2019-03-13 | 2019-07-26 | 中国电建集团河南工程有限公司 | Geothermal well down-hole pipe medicine system and descaling method |
-
2020
- 2020-11-09 CN CN202011240395.4A patent/CN114458243A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2462587C1 (en) * | 2011-11-17 | 2012-09-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of operation of oil-producing high-temperature well |
| CN202752281U (en) * | 2012-08-20 | 2013-02-27 | 陈建平 | Pipeline built-in automatic input device of terrestrial heat scale inhibitors |
| US20150369229A1 (en) * | 2014-06-19 | 2015-12-24 | Saudi Arabian Oil Company | Downhole Chemical Injection Method and System for Use in ESP Applications |
| CN206753550U (en) * | 2017-05-12 | 2017-12-15 | 西南石油大学 | A kind of oil field industrial water ring generating apparatus |
| CN207260975U (en) * | 2017-09-19 | 2018-04-20 | 中国石油天然气集团公司 | A kind of oil field back washing device |
| CN110056330A (en) * | 2019-03-13 | 2019-07-26 | 中国电建集团河南工程有限公司 | Geothermal well down-hole pipe medicine system and descaling method |
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Application publication date: 20220510 |