CN108756861B - Underground temperature and pressure measuring device - Google Patents
Underground temperature and pressure measuring device Download PDFInfo
- Publication number
- CN108756861B CN108756861B CN201810837553.0A CN201810837553A CN108756861B CN 108756861 B CN108756861 B CN 108756861B CN 201810837553 A CN201810837553 A CN 201810837553A CN 108756861 B CN108756861 B CN 108756861B
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- sensor
- cavity
- capsule
- pressure
- temperature
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- 239000007788 liquid Substances 0.000 claims abstract description 60
- 239000002775 capsule Substances 0.000 claims abstract description 34
- 230000001012 protector Effects 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 10
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 47
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 abstract description 17
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
-
- 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
- E21B47/07—Temperature
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to the technical field of underground parameter measurement devices of oil fields, in particular to an underground temperature and pressure measurement device. It comprises the following steps: the two ends of the protector shell are communicated and hollow inside, and the two ends of the protector shell are respectively connected with a screw pump and a motor under the well; the capsule is provided with an opening at one end and is arranged in the protector shell, and the capsule is communicated with the inside of the motor; and the sensor module is fixed at the lower part of the motor. The space between the protector shell and the capsule forms a first cavity for containing well liquid, the communication channel from the inside of the capsule to the upper part of the sensor module forms a second cavity, the sensor module is communicated with the second cavity, and insulating liquid is filled in the second cavity. The capsule is not easy to age and loosen, thereby preventing leakage of well fluid and insulating fluid, and effectively preventing blockage and corrosion of each inductor caused by leakage from causing inductor faults; compared with a rubber pad, the capsule can keep longer elasticity and sensitivity, and effectively avoid the reduction of measurement accuracy caused by long-term use.
Description
Technical Field
The invention relates to the technical field of underground parameter measurement devices of oil fields, in particular to an underground temperature and pressure measurement device.
Background
In a screw pump downhole oil recovery system, the downhole pressure and temperature need to be monitored in real time so as to ensure the safe production of an oil well. The working principle of the existing temperature and pressure measuring device is as follows: the planar rubber pad is used for isolating the well fluid and the sensor, and the sensor is directly contacted with the rubber pad, so that the pressure change of the well fluid can deform the rubber pad to squeeze the pressure sensor to measure the pressure. However, the above-mentioned temperature and pressure measuring device has the following technical drawbacks: the rubber pad produces deformation along with well hydraulic pressure variation, after long-term use, very easily causes the rubber pad to break, and planar rubber pad is in long-term deformation in-process, is easy not hard up with being connected of lateral wall, and above reasons all lead to well liquid leakage very easily, lead to the induction end jam and the corruption of sensor after well liquid leakage, lead to the inductor trouble.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the utility model provides a temperature and pressure measuring device in pit, it can solve among the prior art use the long-term use back rubber pad that the plane rubber pad caused and break or link not hard up to the problem is leaked to the well liquid that leads to, thereby prevents that the well liquid from leaking and causing the inductor to block up and corrode the inductor trouble that leads to.
The technical scheme adopted for solving the technical problems is as follows:
a downhole temperature and pressure measurement device comprising:
the two ends of the protector shell are communicated and hollow inside, and the two ends of the protector shell are respectively connected with a screw pump and a motor under the well;
the capsule is provided with an opening at one end and is arranged in the protector shell, and the capsule is communicated with the inside of the motor;
a sensor module fixed at the lower part of the motor,
the space between the protector shell and the capsule forms a first cavity, the communication channel from the inside of the capsule to the upper part of the sensor module forms a second cavity, the sensor module is communicated with the second cavity, insulating liquid is filled in the second cavity, well liquid enters the first cavity, the well liquid in the first cavity enables the pressure of the insulating liquid in the second cavity to be equal to the pressure of the well liquid in the first cavity through the elastic action of the capsule, the sensor module measures the pressure of the insulating liquid to represent the pressure of the well liquid, and meanwhile, the sensor module can measure the temperature parameter of the well liquid outside the sensor module.
In a preferred embodiment, the material of the capsule is fluororubber.
In a preferred embodiment, the protector housing is connected to the screw pump by a first connector, the protector housing is connected to the motor by a second connector, the first connector has a first through hole penetrating the inside of the protector housing in the axial direction, a liquid inlet hole communicating with external well liquid is formed in the radial direction of the first connector, the liquid inlet hole communicates with the first through hole, the second connector has a second through hole penetrating the inside of the protector housing, the second through hole communicates with the inside of the motor, and the opening of the capsule is connected to the second through hole.
In a preferred embodiment, the insulating liquid is transformer oil.
In a preferred embodiment, the sensor module is connected to the motor via a adapter flange, which has a third through-opening for connecting the interior of the motor to the sensor module.
In a preferred embodiment, the adapter flange has a filling opening for filling the insulating liquid and a drain opening for discharging the insulating liquid.
In a preferred embodiment, the sensor module comprises a sensor housing, a first sealing joint, a second sealing joint, a pressure sensor and a temperature sensor, wherein the first sealing joint is connected with an adapter flange and the sensor housing, the lower end of the sensor housing is connected with the second sealing joint, the pressure sensor is fixed in the first sealing joint and communicated with the second cavity, a fixing seat is fixed in the sensor housing, a circuit board and the temperature sensor are mounted on the fixing seat, the sensing end of the temperature sensor is abutted against the fixing seat, the pressure sensor and the temperature sensor are connected with the circuit board, the sensor housing conducts heat transfer with well fluid outside the sensor housing and conducts temperature to the fixing seat, and therefore the temperature of the fixing seat is equal to that of the well fluid.
In a preferred embodiment, the first sealing joint is provided with a first sealing ring in the axial direction and the second sealing joint is provided with a second sealing ring in the axial direction, both the first sealing ring and the second sealing ring being against the inside of the sensor housing.
In a preferred embodiment, the first sealing joint has a liquid inlet channel for communicating the second cavity with the sensing end of the pressure sensor.
In a preferred embodiment, the first sealing joint is provided with a cable channel penetrating through the first sealing joint, a connector is fixed at one end, close to the second cavity, of the cable channel, UVW cables are connected to two ends of the connector, the UVW cables penetrate through the cable channel to be connected with a circuit board so as to achieve signal and power transmission, and the circuit board is electrically connected with the pressure sensor and the temperature sensor.
The beneficial effects of the invention are as follows: the capsule is filled in the protector shell, a first cavity is formed between the protector shell and the capsule, a second cavity is formed from a communication channel from the inside of the capsule to the upper part of the sensor module, well liquid enters the first cavity, insulating liquid is injected into the second cavity, the structure of directly measuring well liquid parameters by using a planar rubber pad in the prior art is completely changed, the pressure of the insulating liquid is the same as that of the well liquid by using the balance effect of the capsule on the well liquid, the parameters of the insulating liquid are indirectly measured by the sensor module so as to be used for representing the pressure of the well liquid, and the area of the capsule is far larger than that of the rubber pad.
Drawings
FIG. 1 is an exploded view of a thermometric pressure apparatus of the present invention;
FIG. 2 is a cross-sectional view of the thermometric pressure apparatus of the present invention;
FIG. 3 is an enlarged view of a portion of the temperature and pressure measuring device of the present invention at a second sealed joint.
The reference numerals in the drawings are as follows: 1: protector housing, 11: first joint, 111: first through hole, 112: liquid inlet hole, 12: second joint, 121: second through hole, 2: capsule, 3: motor, 41: adapter flange, 42: connector, 431: first sealing joint, 4311: feed liquor channel, 4312: cable channels, 432: first seal ring, 44: pressure sensor, 45: circuit board, 46: sensor housing, 471: second seal joint, 472: second seal ring, 48: temperature sensor, 5: first cavity, 6: second cavity, 7: an insulating liquid.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the downhole temperature and pressure measuring device of the present invention includes a protector housing 1, a capsule 2 installed inside the protector housing 1, and a sensor module communicating with the capsule 2. Wherein the protector housing 1 is connected to the downhole screw pump by a first joint 11, and a second joint 12 is connected to the protector housing 1 at the other end opposite to the first joint 11. The first joint 11 has a first through hole 111 penetrating the inside thereof, and the first through hole 111 is along the axial direction of the first joint 11, meanwhile, a liquid inlet 112 is arranged along the radial direction of the first joint 11, and the first through hole 111 and the liquid inlet 112 are communicated, and a capsule 2 is arranged on a second through hole 121 of the second joint 12, and the second through hole 121 is communicated with the penetrating space inside the motor 3. Preferably, the material of the capsule 2 is fluororubber, which has excellent oil resistance and corrosion resistance, can avoid oil corrosion during long-term use, has good air tightness and excellent bonding performance, and can ensure that the sealing performance of the joint of the capsule 2 and the second through hole 121 is stable and is not easy to leak. The lower part of the motor 3 is connected via an adapter flange 41 to a sensor module comprising a first sealing connection 431, a sensor housing 46, a second sealing connection 471, a pressure sensor 44, a temperature sensor 48 and a circuit board 45. A fixing base is fixed in the sensor housing 46, and a circuit board 45 and a temperature sensor 48 are fixed on the fixing base. The first sealing joint 431 is respectively connected with the adapter flange 41 and the sensor housing 46 through external threads, a first sealing ring 432 is sleeved on one end thread connected with the sensor housing 46 to realize multi-stage sealing, well fluid is prevented from entering the sensor module, and the first sealing ring 432 is of a three-stage sealing structure comprising a first rubber ring, a second rubber ring and a third rubber ring. A second sealing joint 471 is screwed at the lower part of the sensor housing 46, and a second sealing ring 472 is installed between the second sealing joint 471 and the sensor housing 46, and the second sealing ring 472 is a three-stage sealing structure comprising a first rubber ring, a second rubber ring and a third rubber ring. In the above way, the first sealing joint 431 is matched with the first sealing ring 432, and the second sealing joint 471 is matched with the second sealing ring 472 to realize multi-stage sealing, so that the leakage prevention capability of the system is greatly improved. In order to realize the functions of temperature measurement, pressure measurement, power supply and signal transmission, a liquid inlet channel 4311 and a cable channel 4312 are arranged on the first sealing joint 431, wherein the liquid inlet channel 4311 is communicated with a sensing head of the pressure sensor 44, the circuit board 45 is arranged in the sensor shell 46, the temperature sensor 48 is fixed on a bracket of the circuit board 45, and the sensing head of the temperature sensor 48 is abutted against the fixed seat. A connector 42 is mounted on the cable passage 4312, and UVW cables (not shown) are connected to both ends of the connector 42, pass through the cable passage 4312 to be connected to the circuit board 45, and the UVW cables at the other end are connected to power supply and signal receiving devices (not shown).
The working principle of the temperature and pressure measuring device disclosed by the invention is as follows in combination with fig. 2 and 3: the first through hole 111, the gap between the inside of the protector shell 1 and the capsule 2 form a first cavity 5; the interior of the capsule 2, the second through-hole 121, the interior of the motor 3 and the interior of the adapter flange 41 together form a second cavity 6. Since the screw pump suction port communicates with the first through hole 111 and the liquid inlet hole 112 communicates with the external well liquid, the well liquid enters the first cavity 5 through the first through hole 111 and the liquid inlet hole 112; meanwhile, the insulating liquid 7 is injected into the second cavity 6 by the injection Kong Zhuman, preferably, transformer oil is used as the insulating liquid 7, and the insulating liquid 7 can contact the sensing head of the pressure sensor 44 through the liquid inlet channel 4311. When the well fluid in the first cavity 5 is balanced with the pressure of the insulating fluid 7 by the elastic action of the capsule 2, the well fluid pressure is equal to the pressure of the insulating fluid 7, and at this time, the pressure sensor 44 may characterize the fluid pressure by measuring the pressure of the insulating fluid 7. Since the annulus space outside the device is filled with well fluid and the sensor housing 46 conducts heat, the well fluid temperature is transferred to the mounting of the circuit board 45 through the sensor housing 46, and since the temperature sensor 48 is mounted to the mounting of the circuit board 45, the temperature sensor 48 can characterize the well fluid temperature by measuring the mounting temperature of the circuit board 45. The pressure sensor 44 and the temperature sensor 48 transmit parameter signals to the circuit board 45, and the circuit board 45 transmits signals to the ground display device through the UVW cable, so that the real-time measurement of the pressure and the temperature of the well fluid is realized.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover all equivalent structures as modifications within the scope of the invention, either directly or indirectly, as may be contemplated by the present invention.
Claims (9)
1. A downhole temperature and pressure measurement device, comprising:
the two ends of the protector shell are communicated and hollow inside, and the two ends of the protector shell are respectively connected with a screw pump and a motor under the well;
the capsule is provided with an opening at one end and is arranged in the protector shell, and the capsule is communicated with the inside of the motor;
a sensor module fixed at the lower part of the motor,
the gap between the protector shell and the capsule forms a first cavity, a communication channel from the inside of the capsule to the upper part of the sensor module forms a second cavity, the sensor module is communicated with the second cavity, insulating liquid is filled in the second cavity, well liquid enters the first cavity, the pressure of the insulating liquid in the second cavity is equal to the pressure of the well liquid in the first cavity through the elastic action of the capsule, the sensor module measures the pressure of the insulating liquid to represent the pressure of the well liquid, and meanwhile, the sensor module can measure the temperature parameter of the well liquid outside the sensor module;
the protector shell is connected with the screw pump through a first connector, the protector shell is connected with the motor through a second connector, the first connector is provided with a first through hole penetrating through the protector shell in the axial direction, a liquid inlet hole communicated with external well liquid is formed in the radial direction of the first connector, the liquid inlet hole is communicated with the first through hole, the second connector is provided with a second through hole penetrating through the protector shell, the second through hole is communicated with the inside of the motor, and the opening of the capsule is connected to the second through hole.
2. A downhole temperature and pressure measuring device according to claim 1, wherein the capsule is made of fluororubber.
3. A downhole temperature and pressure measuring device according to claim 1, wherein the insulating liquid is transformer oil.
4. A downhole temperature and pressure measurement device according to claim 1, wherein the sensor module is connected to the motor via an adapter flange having a third through hole for communicating the interior of the motor with the sensor module.
5. The downhole temperature and pressure measurement device according to claim 4, wherein the adapter flange is provided with a liquid injection hole and a liquid discharge hole, the liquid injection hole is used for injecting insulating liquid, and the liquid discharge hole is used for discharging the insulating liquid.
6. The downhole temperature and pressure measurement device of claim 4 wherein the sensor module comprises a sensor housing, a first sealing joint, a second sealing joint, a pressure sensor and a temperature sensor, wherein the first sealing joint is connected with the adapter flange and the sensor housing, the second sealing joint is connected with the lower end of the sensor housing, the pressure sensor is fixed in the first sealing joint and communicated with the second cavity, a fixed seat is fixed in the sensor housing, a circuit board and the temperature sensor are mounted on the fixed seat, the sensing end of the temperature sensor is abutted against the fixed seat, the pressure sensor and the temperature sensor are connected with the circuit board, the sensor housing conducts heat transfer with well fluid outside the sensor housing and conducts temperature to the fixed seat, and therefore the temperature of the fixed seat is equal to the temperature of the well fluid.
7. The downhole temperature and pressure measurement device of claim 6 wherein the first sealing joint is axially mounted with a first sealing ring and the second sealing joint is axially mounted with a second sealing ring, both the first and second sealing rings being disposed against the inside of the sensor housing.
8. The downhole temperature and pressure measurement device of claim 6 wherein the first sealing joint has a fluid inlet passage for communicating the second cavity with the sensing end of the pressure sensor.
9. The downhole temperature and pressure measuring device according to claim 6, wherein the first sealing joint is provided with a cable channel penetrating through the first sealing joint, a connector is fixed at one end, close to the second cavity, of the cable channel, UVW cables are connected to two ends of the connector, the UVW cables penetrate through the cable channel to be connected with a circuit board for achieving signal and power transmission, and the circuit board is electrically connected with the pressure sensor and the temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837553.0A CN108756861B (en) | 2018-07-26 | 2018-07-26 | Underground temperature and pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837553.0A CN108756861B (en) | 2018-07-26 | 2018-07-26 | Underground temperature and pressure measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108756861A CN108756861A (en) | 2018-11-06 |
| CN108756861B true CN108756861B (en) | 2024-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810837553.0A Active CN108756861B (en) | 2018-07-26 | 2018-07-26 | Underground temperature and pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108756861B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281656A (en) * | 2018-11-19 | 2019-01-29 | 杭州乾景科技有限公司 | A kind of underground electrical equipment connection sealing structure and pressure measuring unit |
| CN110017132B (en) * | 2019-05-24 | 2023-12-22 | 中国地质科学院地质力学研究所 | Hydraulic fracturing packer and fracturing section pressure monitoring device |
| CN111725643A (en) * | 2020-07-01 | 2020-09-29 | 浙江都美电气技术股份有限公司 | Connector for submersible driving device, connecting module and driving device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4052903A (en) * | 1976-12-06 | 1977-10-11 | Thor Instrument Company, Inc. | Pressure sensor |
| CN201671588U (en) * | 2010-04-30 | 2010-12-15 | 华北科技学院 | Pressure measuring hole sealing apparatus for downward long hole |
| CN103437758A (en) * | 2013-08-14 | 2013-12-11 | 宁波新中方测控系统有限公司 | Downhole temperature and pressure measurement system |
| CN203531889U (en) * | 2013-11-18 | 2014-04-09 | 刘兴家 | Antifreezing casing pressure collector base |
| CN105697001A (en) * | 2016-03-31 | 2016-06-22 | 杭州乾景科技有限公司 | Oil-submersible underground temperature measuring and pressure measuring device |
| CN208633818U (en) * | 2018-07-26 | 2019-03-22 | 杭州乾景科技有限公司 | A kind of underground thermometric pressure measuring unit |
-
2018
- 2018-07-26 CN CN201810837553.0A patent/CN108756861B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4052903A (en) * | 1976-12-06 | 1977-10-11 | Thor Instrument Company, Inc. | Pressure sensor |
| CN201671588U (en) * | 2010-04-30 | 2010-12-15 | 华北科技学院 | Pressure measuring hole sealing apparatus for downward long hole |
| CN103437758A (en) * | 2013-08-14 | 2013-12-11 | 宁波新中方测控系统有限公司 | Downhole temperature and pressure measurement system |
| CN203531889U (en) * | 2013-11-18 | 2014-04-09 | 刘兴家 | Antifreezing casing pressure collector base |
| CN105697001A (en) * | 2016-03-31 | 2016-06-22 | 杭州乾景科技有限公司 | Oil-submersible underground temperature measuring and pressure measuring device |
| CN208633818U (en) * | 2018-07-26 | 2019-03-22 | 杭州乾景科技有限公司 | A kind of underground thermometric pressure measuring unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108756861A (en) | 2018-11-06 |
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