CN111502584A - Heat insulation thermostat for well head casing pipe refrigeration - Google Patents
Heat insulation thermostat for well head casing pipe refrigeration Download PDFInfo
- Publication number
- CN111502584A CN111502584A CN202010318955.7A CN202010318955A CN111502584A CN 111502584 A CN111502584 A CN 111502584A CN 202010318955 A CN202010318955 A CN 202010318955A CN 111502584 A CN111502584 A CN 111502584A
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- China
- Prior art keywords
- thermostat
- heat insulation
- freezing
- cavity
- refrigerant
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- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 21
- 238000005057 refrigeration Methods 0.000 title description 2
- 238000002791 soaking Methods 0.000 claims abstract description 30
- 238000007710 freezing Methods 0.000 claims abstract description 29
- 230000008014 freezing Effects 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000011229 interlayer Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 39
- 230000000694 effects Effects 0.000 abstract description 9
- 239000012774 insulation material Substances 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/047—Casing heads; Suspending casings or tubings in well heads for plural tubing strings
-
- 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/001—Cooling arrangements
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a heat-insulating thermostat for freezing a wellhead casing, which is formed by connecting two semicircular box bodies with symmetrical structures, and surrounds the outside of a pipeline to be cooled; the soaking cavity is tightly surrounded outside the pipeline to be cooled and is filled with liquid nitrogen, so that the cooling speed is high, and the pipeline to be cooled is always kept below the freezing temperature and is in the state of the optimal freezing effect; the refrigerant in the soaking cavity can not generate state change, the temperature distribution is very uniform, and the refrigerant is not influenced by the change of external factors; the thermostat is internally provided with the heat insulation interlayer, is provided with the heat insulation material and is vacuumized, so that the heat insulation effect is better, and the operation requirement for a longer time can be met; the arrangement of the refrigerant storage cavity, the soaking cavity and the heat insulation interlayer reduces the consumption of the refrigerant, avoids frequent operation of supplementing the refrigerant and achieves better freezing effect by using less refrigerant.
Description
Technical Field
The invention belongs to the technical field of temporary freezing and blocking of pipelines, and particularly relates to a heat-insulating thermostat for freezing of a wellhead casing.
Background
In the fields of chemical industry, petroleum, natural gas, water supply systems and the like, the maintenance, replacement and other operations of pipelines or well mouths are often needed, and because certain pressure exists in the pipelines or underground, the fluid in the pipelines needs to be plugged so as to cut off spaces on two sides of a plugging block, control the pressure on the downstream of the plugging block and further carry out the field operation of replacing valves, pipelines, pipe fittings and the like. For an oil well head, the traditional mechanical plugging mode cannot simultaneously plug the inner diameter and the annular space of an oil pipe, the sealing is unreliable, and safety accidents are easy to happen. The device based on the freezing temporary plugging technology can complete plugging of the pressurized oil gas well in a shorter time, realize operations such as well mouth replacement and maintenance on the rear side of the plugging end, eliminate hidden danger and recover production.
Two existing implementations of freezing temporary plugging technology:
1. freezing box device suitable for freezing temporary plugging process of oil well wellhead
Including two semicircle ring box bodies that dock mutually, two semicircle ring box bodies are articulated through the hinge at radial one side, and the box body assembly center after the butt joint forms circular hollow, and the sleeve pipe is located circular hollow department, is closely wrapped up by the box body assembly, and the semicircle ring box body is inside then to be used for placing the refrigerant. The two semicircular box bodies are connected at the other radial side end through a locking device. The semicircular box body is divided into an outer box and an inner box, the inner box is arranged inside the outer box in a drawing mode, and the upper end of the inner box is provided with a box cover. The inner wall of the outer box is provided with a limiting table for preventing the inner box from being separated upwards. The outer box and the inner box are both provided with observation windows.
The outer wall of one side of the sleeve pipe, which is far away from the outer box and the inner box, is provided with a heat insulation material, and the inner wall of the box cover and the bottom surface of the outer side of the outer box are both provided with a heat insulation material. The inner walls of the outer box and the inner box, which are close to one side of the sleeve, are provided with heat conducting materials, and the inner edge of the inner ring of the box cover is provided with a sealing rubber sheet. And an arbitrary point positioning mechanism is arranged between the outer wall of the inner box and the inner wall of the outer box. The axial positioning mechanism at any point is friction lines, namely, the outer wall of the inner box and the inner wall of the outer box are provided with friction positioning lines matched with each other in a convex-concave manner.
2. Freezing temporary blocking device
This freezing temporary blocking device presss from both sides the cover including surrounding the cylinder outside treating the cooling pipe, presss from both sides the inside refrigerant that holds of cover, and refrigerant conveying line connects between the refrigerant holding vessel outside pressing from both sides the cover and pressing from both sides the cover, is provided with the governing valve on the refrigerant conveying line, is provided with temperature-detecting device in the clamp cover and on treating the cooling pipe outer wall, and the governing valve is connected with measurement and control device with temperature-detecting device simultaneously. The jacket is internally provided with a cold air distributor which comprises a circular ring plate sleeved outside the pipeline to be cooled and distribution holes positioned on the circular ring plate, and the cold air distributor is a steel wire mesh.
The jacket is formed by connecting two semicircular first jackets and two semicircular second jackets, and each jacket comprises an insulating layer and connecting outer edges protruding outwards from two side edges of the insulating layer.
The cooling temperature of the existing thermostat is not low enough, the cooling time is long, the pressure bearing capacity of a plugging block is small, and the safety of plugging is not high; automatic replenishment of cryogen cannot be achieved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an insulating thermostat for wellhead casing freezing.
A heat-insulating thermostat for freezing a wellhead casing is formed by connecting two semicircular box bodies with symmetrical structures, and surrounds the outside of a pipeline to be cooled;
a storage cavity and a soaking cavity are formed in the semicircular box body, the soaking cavity surrounds the periphery of the pipeline to be cooled, the storage cavity surrounds the periphery of the soaking cavity, and the storage cavity is communicated with the soaking cavity through an outlet pipe;
a heat insulation interlayer is arranged between the storage cavity and the soaking cavity, and a heat insulation interlayer is arranged between the storage cavity and the outer wall of the heat insulation thermostat;
and the semicircular box body is provided with a control valve group and a signal interface.
In the above technical solution, the heat-insulating thermostat is provided with a thermostat upper flange and a thermostat lower flange for mounting.
In the technical scheme, the pipeline to be cooled is connected with a temporary plugging agent injection system.
In the technical scheme, the inner side of the soaking cavity is in close contact with the pipeline to be cooled by using a heat conduction material.
In the technical scheme, a heater is arranged in the storage cavity and used for rewarming the thermostat.
In the technical scheme, the two semicircular box bodies are fixedly connected through the fastening bolt.
In the above technical solution, the heat insulating interlayer is evacuated.
In the technical scheme, the control valve group comprises an injection valve, a pressure increasing valve, an emptying valve and a safety valve, wherein the injection valve is connected with an external liquid nitrogen tank and used for supplementing liquid nitrogen, and the pressure increasing valve is used for filling liquid nitrogen into the soaking cavity.
In the technical scheme, the signal interface is connected with the measurement and control device and used for monitoring the temperature, the pressure and the liquid level inside the thermostat.
The invention has the advantages and beneficial effects that:
1. the soaking cavity is tightly surrounded outside the pipeline to be cooled and is filled with liquid nitrogen, so that the cooling speed is high, and the pipeline to be cooled is always kept below the freezing temperature and is in the state of the optimal freezing effect;
2. the refrigerant in the soaking cavity can not be subjected to state change, the temperature distribution is very uniform, and the change of external factors is avoided.
3. The thermostat is internally provided with the heat insulation interlayer, is provided with the heat insulation material and is vacuumized, so that the heat insulation effect is better, and the operation requirement for a longer time can be met.
4. The arrangement of the refrigerant storage cavity, the soaking cavity and the heat insulation interlayer reduces the consumption of the refrigerant, avoids frequent operation of supplementing the refrigerant and achieves better freezing effect by using less refrigerant.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein: the device comprises a temporary plugging agent injection system 1, a pipeline valve 2, a pipeline to be cooled 3, a signal interface 4, a control valve group 5, a heater 6, a storage cavity 7, a leading-out pipe 8, a soaking cavity 9, a heat insulation interlayer 10, a lower flange of a thermostat 11, an upper flange of the thermostat 12 and a fastening bolt 13.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Examples
As shown in figure 1, the heat-insulating thermostat for freezing a wellhead casing comprises two semicircular box bodies with symmetrical structures, wherein the two box bodies are butted in the radial direction and connected through a fastening bolt 13, a cavity is formed in the center of the butted box bodies, and a pipeline to be cooled is positioned in the cavity and is tightly surrounded by the box bodies.
The semi-circular box body mainly comprises 3 parts, namely a refrigerant storage cavity 7, a soaking cavity 9 and a heat insulation interlayer 10.
The refrigerant storage cavity 7 is arranged on the outer side of the semicircular box body, the refrigerant is stored in the refrigerant storage cavity 7, the refrigerant is usually liquid nitrogen, and compared with the traditional scheme of dry ice and methanol, the refrigerant storage cavity has obvious advantages of safety, high efficiency and no pollution, and the refrigerant can also be other cold fluids and can realize the same functions.
Soaking chamber 9 arranges at the semicircle ring box inboard, with treat cooling jacket or pipeline 3 in close contact with, is full of the refrigerant in soaking chamber 9, and liquid nitrogen promptly, this part liquid nitrogen is direct to be used for treating cooling jacket or pipeline 3 and cools off, has that temperature distribution is even, the fast effect of cooling speed.
The parts except the refrigerant storage cavity 7 and the soaking cavity 9 are heat insulation interlayers 10 which are specifically distributed between the outer wall of the thermostat and the refrigerant storage cavity 7 and between the refrigerant storage cavity 7 and the soaking cavity 9, the heat insulation interlayers 10 are wrapped and covered with heat insulation materials and are simultaneously vacuumized to realize the maximum heat insulation effect, and various heat insulation materials can be applied, such as foaming materials, foam materials, multilayer heat insulation binding and the like. The specific arrangement of the heat insulation material is that the outer wall and the upper and lower end faces of the thermostat are made of the heat insulation material, the inner wall of the thermostat, which is in contact with the sleeve or the pipeline 3 to be cooled, is made of a heat conduction material, and the heat insulation material is arranged around the refrigerant storage cavity 7 and outside the soaking cavity 9.
The refrigerant storage cavity 7 is connected with the soaking cavity 9 through a refrigerant outlet pipe 8, liquid in the refrigerant storage cavity 7 enters the soaking cavity 9 through the refrigerant outlet pipe 8, the cooling process is realized, and the refrigerant outlet pipe uses a metal hose with a heat preservation function, so that the loss of cold energy in the transmission process is reduced; meanwhile, a heater 6 is also arranged in the refrigerant storage cavity 7, and after the freezing temporary blocking operation is finished, the heater 6 is used for unfreezing and rewarming the thermostat and the sleeve or pipeline 3 to be cooled.
The thermostat top end face is reserved with a plurality of interfaces and valves for measuring and adjusting the thermostat internal conditions, and the thermostat top end face comprises a thermostat refrigerant control valve group 5 and a signal interface 4. The thermostat refrigerant control valve group 5 specifically comprises an injection valve, a pressure increasing valve, an emptying valve and a safety valve, and liquid nitrogen is filled into or emptied out of the refrigerant storage cavity 7 and liquid nitrogen is filled into the soaking cavity 9 from the refrigerant storage cavity 7 through the operation of each valve. Signal interface 4 is used for monitoring the inside condition of thermostat, including temperature, pressure, flow, liquid level isoparametric, be connected with measurement and control device simultaneously, according to the parameter that records, adjust the aperture of each valve of thermostat, the flow of control refrigerant, the realization is to the control of cooling rate, treat the temperature stabilization back, keep thermostat steady operation through signal interface 4 and measurement and control device equally, guarantee freezing effect, after the operation is accomplished, can also control rewarming speed, many-sided guarantee treats that cooling pipe or the used material of sleeve pipe 3 is safe in whole operation flow, stable.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (9)
1. An insulated thermostat for wellhead casing freezing, characterized by: the cooling device is formed by connecting two semicircular box bodies with symmetrical structures, and surrounds the outside of a pipeline to be cooled;
a storage cavity and a soaking cavity are formed in the semicircular box body, the soaking cavity surrounds the periphery of the pipeline to be cooled, the storage cavity surrounds the periphery of the soaking cavity, and the storage cavity is communicated with the soaking cavity through an outlet pipe;
a heat insulation interlayer is arranged between the storage cavity and the soaking cavity, and a heat insulation interlayer is arranged between the storage cavity and the outer wall of the heat insulation thermostat;
and the semicircular box body is provided with a control valve group and a signal interface.
2. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: the heat-insulating thermostat is provided with a thermostat upper flange and a thermostat lower flange for mounting.
3. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: and the pipeline to be cooled is connected with the temporary plugging agent injection system.
4. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: the inner side of the soaking cavity is in close contact with the pipeline to be cooled by using a heat conducting material.
5. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: the storage cavity is internally provided with a heater for rewarming the thermostat.
6. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: and the two semicircular box bodies are fixedly connected through fastening bolts.
7. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: and vacuumizing the heat insulation interlayer.
8. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: the control valve group comprises an injection valve, a pressure increasing valve, an emptying valve and a safety valve, wherein the injection valve is connected with an external liquid nitrogen tank and used for supplementing liquid nitrogen, and the pressure increasing valve is used for filling liquid nitrogen into the soaking cavity.
9. An insulated thermostat for wellhead casing freezing as claimed in claim 1 wherein: the signal interface is connected with the measurement and control device and used for monitoring the temperature, the pressure and the liquid level inside the thermostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010318955.7A CN111502584A (en) | 2020-04-21 | 2020-04-21 | Heat insulation thermostat for well head casing pipe refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010318955.7A CN111502584A (en) | 2020-04-21 | 2020-04-21 | Heat insulation thermostat for well head casing pipe refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111502584A true CN111502584A (en) | 2020-08-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010318955.7A Pending CN111502584A (en) | 2020-04-21 | 2020-04-21 | Heat insulation thermostat for well head casing pipe refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111502584A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031695A (en) * | 2020-11-05 | 2020-12-04 | 胜利油田胜机石油装备有限公司 | Gas production wellhead device and gas production well |
| CN117646614A (en) * | 2024-01-29 | 2024-03-05 | 中国石油集团川庆钻探工程有限公司 | Freezing temporary plugging valve replacing device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070144732A1 (en) * | 2005-04-22 | 2007-06-28 | Kim Dong S | Low temperature barriers for use with in situ processes |
| CN103015997A (en) * | 2013-01-16 | 2013-04-03 | 西南石油大学 | Filtration plugging testing apparatus and simulation method for process of fracture temporary plugging by ice crystals |
| CN204717218U (en) * | 2015-06-29 | 2015-10-21 | 孙耕 | Freeze temporary blocking device |
| CN205823227U (en) * | 2016-08-01 | 2016-12-21 | 东营蒙德石油装备制造有限公司 | A kind of temporary block apparatus of fluid |
| CN106337670A (en) * | 2015-07-16 | 2017-01-18 | 中国石油化工股份有限公司 | Freezing box device applicable to oil well wellhead frozen temporary plugging technology |
| CN207988987U (en) * | 2018-03-14 | 2018-10-19 | 维欧（天津）能源技术服务有限公司 | A kind of refrigeration temporary blocking equipment for offshore oil |
| CN209444312U (en) * | 2018-12-25 | 2019-09-27 | 中国科学院理化技术研究所 | Well head cooling device based on high-speed turbo expander |
-
2020
- 2020-04-21 CN CN202010318955.7A patent/CN111502584A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070144732A1 (en) * | 2005-04-22 | 2007-06-28 | Kim Dong S | Low temperature barriers for use with in situ processes |
| CN103015997A (en) * | 2013-01-16 | 2013-04-03 | 西南石油大学 | Filtration plugging testing apparatus and simulation method for process of fracture temporary plugging by ice crystals |
| CN204717218U (en) * | 2015-06-29 | 2015-10-21 | 孙耕 | Freeze temporary blocking device |
| CN106337670A (en) * | 2015-07-16 | 2017-01-18 | 中国石油化工股份有限公司 | Freezing box device applicable to oil well wellhead frozen temporary plugging technology |
| CN205823227U (en) * | 2016-08-01 | 2016-12-21 | 东营蒙德石油装备制造有限公司 | A kind of temporary block apparatus of fluid |
| CN207988987U (en) * | 2018-03-14 | 2018-10-19 | 维欧（天津）能源技术服务有限公司 | A kind of refrigeration temporary blocking equipment for offshore oil |
| CN209444312U (en) * | 2018-12-25 | 2019-09-27 | 中国科学院理化技术研究所 | Well head cooling device based on high-speed turbo expander |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031695A (en) * | 2020-11-05 | 2020-12-04 | 胜利油田胜机石油装备有限公司 | Gas production wellhead device and gas production well |
| CN112031695B (en) * | 2020-11-05 | 2021-01-08 | 胜利油田胜机石油装备有限公司 | Gas production wellhead device and gas production well |
| CN117646614A (en) * | 2024-01-29 | 2024-03-05 | 中国石油集团川庆钻探工程有限公司 | Freezing temporary plugging valve replacing device and method |
| CN117646614B (en) * | 2024-01-29 | 2024-04-05 | 中国石油集团川庆钻探工程有限公司 | Freezing temporary plugging valve replacing device and method |
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Application publication date: 20200807 |
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