CN110242282A - A kind of downhole video instrument - Google Patents
A kind of downhole video instrument Download PDFInfo
- Publication number
- CN110242282A CN110242282A CN201910652282.6A CN201910652282A CN110242282A CN 110242282 A CN110242282 A CN 110242282A CN 201910652282 A CN201910652282 A CN 201910652282A CN 110242282 A CN110242282 A CN 110242282A
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- China
- Prior art keywords
- pressure
- outer tube
- lower contact
- bearing outer
- absorber
- Prior art date
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- Granted
Links
- 239000006096 absorbing agent Substances 0.000 claims abstract description 43
- 238000003384 imaging method Methods 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims abstract description 9
- 239000012212 insulator Substances 0.000 claims description 28
- 239000005357 flat glass Substances 0.000 claims description 17
- 239000004519 grease Substances 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000005587 bubbling Effects 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- 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
It the present invention relates to a kind of downhole video instrument, is used more particularly to a kind of oil, gas well well logging, photoelectric compound cable instrument, whether has the phenomenon that deformation, corrosion mainly for detection of pipeline and as caused by casing damage phenomena such as bubbling and fishing junk；Especially at sea or oil/gas well in relatively rugged environment than using.A kind of downhole video instrument of the present invention, including pressure-bearing outer tube and hollow lower contact, the lower contact is connected on one end of pressure-bearing outer tube, and one end that pressure-bearing outer tube is connected with lower contact is the outer pipe end of pressure-bearing；The configuration of the present invention is simple, the high pressure in working environment of the present invention is born using pressure-bearing outer tube, and external high temperature is slowed down along axial conduction to imaging sensor by camera lens, imaging sensor itself is pyrotoxin, it is conducted heat on absorber by adjusting set, imaging sensor is avoided to fail because bearing excessively high temperature.
Description
Technical field
The present invention relates to a kind of downhole video instruments, use more particularly to a kind of oil, gas well well logging, photoelectric compound cable instrument
Whether device has the phenomenon that deformation, corrosion and as caused by casing damage phenomena such as bubbling mainly for detection of pipeline, Yi Jiluo
Object is salvaged；Especially at sea or oil/gas well in relatively rugged environment than using.
Background technique
Usually using the degree of measurement multi-arm borehole measuring assessment casing deformation and corrosion in oil well logging operation, in well logging
Data are transported to ground system by middle remote short section, need interpretation software that can just recover 3D effect figure, and instrument be by
A limited number of measurement arm compositions, which results in lateral resolutions loss.Downhole video can not only pass through in real time
Ground system shows that software observes the actual hole condition in underground, and can be by ground interpretation software by the picture taken or view
Frequency utilizes pixel comparison method, the degree for evaluating the corrosion on measured structure surface or getting rusty.
It is analyzed in terms of economic benefit, cost can be reduced using the detection that downhole video technology carries out bad well, reduction need not
The spending wanted.The application range of downhole video also constantly expands, and the system is not only applicable in oilfield at present, bores in the hydrology
The repair in hole and well, coalfield field, engineering geology are also widely used in field.
Common imaging sensor heatproof index is not able to satisfy stone in many cases generally under 70 DEG C currently on the market
High temperature and pressure requirement under oil well.
The imaging sensor of existing video instrument is connected by cable with external signal receiving instrument, due to transmission rate
Limitation, most of instrument all band internal storage space, biggish memory space, although solve data volume greatly can not real-time Transmission
The problem of；While storing high-definition image can only on-line normalization low resolution image, can not achieve big data quantity high definition figure
The real-time Transmission of picture.
Summary of the invention
To solve the above-mentioned problems, the present invention provides that a kind of structure is simple, can adapt to the extraneous ring of complexity of high temperature and pressure
Border guarantees the normal operation of internal component, accurate, quick, intuitive, clear to carry out the transmitting of big data quantity vision signal, thus
Truly judge a kind of downhole video instrument of borehole wall abnormal conditions and abnormal position.
A kind of downhole video instrument of the present invention, including pressure-bearing outer tube and hollow lower contact, the lower contact, which is connected to, is held
On the one end for pressing outer tube, one end that pressure-bearing outer tube is connected with lower contact is the outer pipe end of pressure-bearing, and the other end is pressure-bearing outer tube head end；
The lower contact is also connected with a block head on one end far from pressure-bearing outer tube；
It further include an insulating tube, insulating tube is the insulating tube of hollow columnar, and the insulating tube is coaxially inscribed in pressure-bearing outer tube, and
One end of insulating tube is fixedly linked with lower contact；One end that insulating tube is connected with lower contact is heat preservation pipe end, and the other end is to protect
Warm Guan Shouduan；
Heat sink, the heat insulator and lower contact stationary phase that heat sink passes through hollow columnar are filled in the insulating tube head end
Even, chamber resettling is provided in the heat sink；
A center stepped hole is provided on the block head, the one end of center stepped hole far from lower contact is connected by O-ring seal
It is connected to window glass of the closure in hollow stepped hole；
It is provided in window glass on the chamber resettling, heat insulator central area, the central area of lower contact and block head
Heart stepped hole forms airtight chamber；Imaging sensor and columnar camera lens, the chamber resettling are provided in the airtight chamber
It is inside provided with adjusting set, described image sensor is arranged in chamber resettling and offsets with adjusting set, described camera lens one end and figure
As sensor is connected, the other end pass through heat insulator central area, lower contact central area after protrude into the center step of block head
The step of Kong Bingyu center stepped hole offsets.
Preferably, heat sink is columned absorber, and the chamber resettling is also cylindric, and coaxial with absorber
Setting；One end of the absorber towards lower contact is provided with a blind hole, and blind hole and absorber are coaxially disposed, which is accommodating
Chamber, the absorber are the absorber that shell wraps up heat absorbent forming, which is five water sodium thiosulfate.
Preferably, adjusting set is columnar hollow adjusting set, is provided with external screw thread, the inner wall of absorber on the circumferential surface of adjusting set
On have internal screw thread, the external screw thread in adjusting set on absorber internal screw thread matching is connected, adjusted by screwing or unscrewing screw thread
The length for saving image sensor portion, makes it be tightly attached to the blind-hole bottom face of absorber, and the heat that sensor generates is led as early as possible
Enter into absorber.Adjusting set is thermally conductive fast aluminum alloy material.
Preferably, heat-conducting silicone grease is filled in the region between adjusting set and imaging sensor.
Preferably, heat insulator is socketed in outside camera lens, and the both ends of heat insulator be it is ladder-like, heat insulator is connected with absorber
One end be inscribed in absorber, and be fixedly linked by sunk screw and absorber, one end that heat insulator is connected with lower contact
It is socketed in outside lower contact, is fixedly linked also by sunk screw and lower contact.
Preferably, lower contact includes hollow ring protrusion, and the two sides axial along hollow ring protrusion are provided in one
Empty loop connecting head, the hollow and annular connector are fixedly linked with hollow ring protrusion, and hollow and annular connects head annular
It is step-like；
The hollow and annular connector of close pressure-bearing outer tube is head end connector in lower contact, and another hollow and annular connector is end
Connector；Ring-shaped step on the head end connector is multi-stage annular step, the multi-stage annular step on head end connector according to
It is secondary to be inscribed in pressure-bearing outer tube, insulating tube and heat insulator, and head end connector passes through sunk screw and heat insulator and heat preservation respectively
Pipe is fixedly linked；
It is provided with internal screw thread in the outer pipe end of the pressure-bearing, is provided with outer spiral shell on the head end connector being socketed in pressure-bearing outer tube
Line, internal screw thread is connected with external screw thread matching on head end connector on pressure-bearing outer tube, and head end connector protrudes into the one of pressure-bearing outer tube
O-ring seal is provided between end and pressure-bearing outer tube；
The end connector is connected with block head welded seal.
Preferably, it is provided with an annular groove on the one end of center stepped hole far from pressure-bearing outer tube, is provided with one in the annular groove
Annular retaining ring, the internal diameter of annular retaining ring is greater than the diameter of camera lens, and is less than the outer diameter of window glass；The window glass passes through pad
Circle offsets with annular retaining ring.
Or preferably, the circumferential direction on the one end of block head far from pressure-bearing outer tube along center stepped hole is removably provided with
Several lighting devices.
Preferably, lighting device is LED light group, and LED light group is high color temperature lamp or low color temperature lamp or high color temperature lamp and low
The setting of color temperature lamp interval.
The configuration of the present invention is simple is born the high pressure in working environment of the present invention using pressure-bearing outer tube, and is slowed down by camera lens
For external high temperature along axial conduction to imaging sensor, imaging sensor itself is pyrotoxin, is conducted heat to by adjusting set
On absorber, imaging sensor is avoided to fail because bearing excessively high temperature.It is quasi- to realize the expansion of use scope of the present invention
Really judge the abnormal conditions and abnormal position in petroleum down-hole casing, reduce unnecessary expenditures, saves production cost.
The advantage of the invention is that solving the problems, such as sensor heatproof using insulating tube and conducive to the structure of heat transmitting, utilizing
Photoelectric compound cable solves the problems, such as big data quantity video signal transmission.
Camera lens, imaging sensor are mounted in insulating tube by the present invention, and insulating tube is mounted in pressure-bearing outer tube, make camera lens and
Imaging sensor can either bear extraneous high pressure, and the high temperature being able to bear under oil well.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Appended drawing reference: 1- absorber, 2- insulating tube, 3- adjusting set, 4- pressure-bearing outer tube, 5- imaging sensor, 6- camera lens, 7-
Heat insulator, 8-O type sealing ring, 9- lower contact, 11-LED lamp group, 12- window glass, 13- circlip, 14- heat-conducting silicone grease.
Specific embodiment
A kind of downhole video instrument of the present invention, including pressure-bearing outer tube 4 and hollow lower contact 9, the lower contact 9 is connected to
On one end of pressure-bearing outer tube 4, one end that pressure-bearing outer tube 4 is connected with lower contact 9 is 4 end of pressure-bearing outer tube, and the other end is outside pressure-bearing
4 head end of pipe；A block head is also connected on the described one end of lower contact 9 far from pressure-bearing outer tube 4；
It further include an insulating tube 2, insulating tube 2 is the insulating tube 2 of hollow columnar, and the insulating tube 2 is coaxially inscribed in pressure-bearing outer tube 4
It is interior, and one end of insulating tube 2 is fixedly linked with lower contact 9；One end that insulating tube 2 is connected with lower contact 9 is 2 end of insulating tube,
The other end is 2 head end of insulating tube；
Heat sink is filled in 2 head end of insulating tube, heat sink is solid by the heat insulator 7 of hollow columnar and lower contact 9
It is fixed to be connected, chamber resettling is provided in the heat sink；Camera lens 6 and imaging sensor 5 are placed in insulating tube 2, with the external world
High temperature isolation, effectively improves the heatproof index of video instrument.
A center stepped hole is provided on the block head, the one end of center stepped hole far from lower contact 9 passes through O-shaped sealing
Circle 8 is connected with window glass 12 of the closure in hollow stepped hole；The O-ring seal 8 of window glass 12 and extraneous high pressure every
From；For window glass 12 with circlip 13 in center stepped hole, 12 both ends of window glass are respectively provided with engineering plastics material
Washer II and washer I, play buffer function when window glass 12 is by impact vibration.
Window glass is provided on the chamber resettling, 7 central area of heat insulator, the central area of lower contact 9 and block head
The center stepped hole of glass 12 forms airtight chamber to be isolated from the outside；5 He of imaging sensor is provided in the airtight chamber
Columnar camera lens 6, is provided with adjusting set 3 in the chamber resettling, described image sensor 5 be arranged in chamber resettling and with tune
Section set 3 offsets, described 6 one end of camera lens is connected with imaging sensor 5, and the other end is across 7 central area of heat insulator, lower contact 9
The center stepped hole of block head is protruded into behind central area and is offseted with the step of center stepped hole.Imaging sensor 5 by across
The photoelectric compound cable of adjusting set 3 and absorber 1 is connected with external signal receiving instrument.
Video instrument involved in the present invention is using photoelectric compound cable as ground data acquisition part and downhole instrument
Transmission medium, conventional instrument communication and instrument power supply are completed by the cable in composite cable；Big data quantity is transmitted by optical fiber
Vision signal.To realize the real-time Transmission of high-definition image, accurate, quick, intuitive, clearly, truly it can judge that the borehole wall is different
Reason condition and position.It is analyzed in terms of economic benefit, cost can be reduced using the detection that downhole video technology carries out bad well, reduced
Unnecessary expenditures.
Camera lens 6 uses a kind of overlength camera lens 6, and ambient temperature can be delayed to pass on imaging sensor 5；It can also be in camera lens 6
Corresponding provision for thermal insulation is taken in part, generates good heat insulation.Camera lens of the present invention further slows down the external world using overlength camera lens
High temperature is along axial conduction to imaging sensor.
Heat sink is columned absorber 1, and the chamber resettling is also cylindric, and is coaxially disposed with absorber 1；
One end of absorber 1 towards the lower contact 9 is provided with a blind hole, and blind hole and absorber 1 are coaxially disposed, which is accommodating cavity
Room, the absorber 1 are the absorber 1 that shell wraps up heat absorbent forming, which is five water sodium thiosulfate.
Adjusting set 3 is columnar hollow adjusting set 3, is provided with external screw thread on the circumferential surface of adjusting set 3, on the inner wall of absorber 1
There is internal screw thread, the external screw thread in adjusting set 3 is connected with the internal screw thread matching on absorber 1, adjusts by screwing or unscrewing screw thread
The length for saving 5 part of imaging sensor, makes it be tightly attached to the blind-hole bottom face of absorber 1, and the heat that sensor is generated is as early as possible
It imported into absorber 1.Adjusting set 3 is thermally conductive fast aluminum alloy material.
Heat-conducting silicone grease 14 is filled in region between adjusting set 3 and imaging sensor 5.
Heat insulator 7 is socketed in outside camera lens 6, and the both ends of heat insulator 7 be it is ladder-like, heat insulator 7 is connected with absorber 1
One end is inscribed in absorber 1, and is fixedly linked with absorber 1 by sunk screw, heat insulator 7 be connected with lower contact 9 one
End is socketed in outside lower contact 9, is fixedly linked also by sunk screw and lower contact 9.
Lower contact 9 includes hollow ring protrusion, and the two sides axial along hollow ring protrusion are provided with a hollow and annular
Connector, the hollow and annular connector are fixedly linked with hollow ring protrusion, and hollow and annular connector annular table scalariform；
The hollow and annular connector of close pressure-bearing outer tube 4 is head end connector in lower contact 9, and another hollow and annular connector is end
Hold connector；Ring-shaped step on the head end connector is multi-stage annular step, the multi-stage annular step on head end connector
It is successively inscribed in pressure-bearing outer tube 4, insulating tube 2 and heat insulator 7, and head end connector passes through sunk screw and heat insulator 7 respectively
It is fixedly linked with insulating tube 2；
It is provided with internal screw thread on 4 end of pressure-bearing outer tube, is provided with outer spiral shell on the head end connector being socketed in pressure-bearing outer tube 4
Line, internal screw thread is connected with external screw thread matching on head end connector on pressure-bearing outer tube 4, and head end connector protrudes into pressure-bearing outer tube 4
O-ring seal 8 is provided between one end and pressure-bearing outer tube 4；
The end connector is connected with block head welded seal.
Center stepped hole is provided with an annular groove on one end far from pressure-bearing outer tube 4, an annular gear is provided in the annular groove
Circle, the internal diameter of annular retaining ring is greater than the diameter of camera lens 6, and is less than the outer diameter of window glass 12；The window glass 12 passes through pad
Circle offsets with annular retaining ring.
Circumferential direction on the one end of block head far from pressure-bearing outer tube 4 along center stepped hole is removably provided with several illuminations
Device.
Lighting device is LED light group 11, and LED light group 11 is high color temperature lamp or low color temperature lamp or high color temperature lamp and low color
Warm lamp interval setting, the LED light group 11 are connected with photoelectric compound cable, realize the control to LED light group 11.According to underground
Different medium selection uses the LED light group 11 of different-colour, uses in different media for the present invention and obtains best shooting effect,
LED light group 11 can be replaced.There are several LED light, generally six in same LED light group 11, it is two neighboring in six LED light
LED light is high color temperature lamp or low color temperature lamp or one be high color temperature lamp one is low color temperature lamp.
Downhole video instrument uses transmission medium of the photoelectric compound cable as ground data acquisition part and downhole instrument,
Conventional instrument communication and instrument power supply are completed by the cable in photoelectric compound cable；Big data quantity video letter is transmitted by optical fiber
Number, the actual conditions of software real-time display underground are shown by ground system.
The configuration of the present invention is simple is born the high pressure in working environment of the present invention using pressure-bearing outer tube 4, and is subtracted by camera lens 6
Slow high temperature is conducted to imaging sensor 5, then is conducted through adjusting set 3 to absorber 1, to realize the expansion of use scope of the present invention
Greatly, accurate judgement abnormal conditions and abnormal position reduce unnecessary expenditures, save production cost.
Claims (10)
1. a kind of downhole video instrument, including pressure-bearing outer tube (4) and hollow lower contact (9), the lower contact (9), which is connected to, is held
On the one end for pressing outer tube (4), one end that pressure-bearing outer tube (4) is connected with lower contact (9) is pressure-bearing outer tube (4) end, and the other end is
Pressure-bearing outer tube (4) head end；A block head is also connected on one end of the lower contact (9) separate pressure-bearing outer tube (4)；
It is characterized in that, further including an insulating tube (2), insulating tube (2) is the insulating tube (2) of hollow columnar, the insulating tube (2)
It is coaxially inscribed in pressure-bearing outer tube (4), and one end of insulating tube (2) is fixedly linked with lower contact (9)；Insulating tube (2) connects under
The connected one end of head (9) is insulating tube (2) end, and the other end is insulating tube (2) head end；
Heat sink is filled in insulating tube (2) head end, heat sink passes through the heat insulator (7) of hollow columnar and lower contact
(9) it is fixedly linked, is provided with chamber resettling in the heat sink；
A center stepped hole is provided on the block head, center stepped hole passes through O-ring seal far from the one end of lower contact (9)
(8) it is connected with window glass (12) of the closure in hollow stepped hole；
Window glass is provided on the chamber resettling, heat insulator (7) central area, the central area of lower contact (9) and block head
The center stepped hole of glass (12) forms airtight chamber；Imaging sensor (5) and columnar camera lens are provided in the airtight chamber
(6), it is provided in the chamber resettling adjusting set (3), described image sensor (5) is arranged in chamber resettling and and adjusting set
(3) it offsets, described camera lens (6) one end is connected with imaging sensor (5), and the other end passes through heat insulator (7) central area, lower contact
(9) center stepped hole of block head is protruded into behind central area and is offseted with the step of center stepped hole.
2. a kind of downhole video instrument as described in claim 1, which is characterized in that the heat sink is columned absorber
(1), the chamber resettling is also cylindric, and is coaxially disposed with absorber (1)；The absorber (1) is towards lower contact (9)
One end is provided with a blind hole, and blind hole and absorber (1) are coaxially disposed, which is chamber resettling, and the absorber (1) is shell
Wrap up the absorber (1) of heat absorbent forming.
3. a kind of downhole video instrument as claimed in claim 2, which is characterized in that the adjusting set (3) is columnar hollow adjusting
It covers (3), is provided with external screw thread on the circumferential surface of adjusting set (3), there is internal screw thread on the inner wall of absorber (1), it is outer in adjusting set (3)
Screw thread is connected with the internal screw thread matching on absorber (1).
4. a kind of downhole video instrument as claimed in claim 3, which is characterized in that the adjusting set (3) and imaging sensor (5)
Between region in be filled with heat-conducting silicone grease (14).
5. a kind of downhole video instrument as claimed in claim 4, which is characterized in that the heat insulator (7) is socketed in camera lens (6)
Outside, and the both ends of heat insulator (7) be it is ladder-like, one end that heat insulator (7) is connected with absorber (1) is inscribed in absorber (1)
It is interior, and be fixedly linked by sunk screw with absorber (1), one end that heat insulator (7) is connected with lower contact (9), which is socketed in down, to be connect
Head (9) outside, is fixedly linked also by sunk screw and lower contact (9).
6. a kind of downhole video instrument as claimed in claim 5, which is characterized in that the lower contact (9) includes a hollow ring
Protrusion, the two sides axial along hollow ring protrusion are provided with a hollow and annular connector, the hollow and annular connector with
Hollow ring protrusion is fixedly linked, and hollow and annular connector annular table scalariform；
Hollow and annular connector in lower contact (9) close to pressure-bearing outer tube (4) is head end connector, another hollow and annular connector
For end connector；Ring-shaped step on the head end connector is multi-stage annular step, the multi-stage annular on head end connector
Step is successively inscribed in pressure-bearing outer tube (4), insulating tube (2) and heat insulator (7), and head end connector passes through sunk screw respectively
It is fixedly linked with heat insulator (7) and insulating tube (2)；
It is provided with internal screw thread on pressure-bearing outer tube (4) end, is provided on the head end connector being socketed in pressure-bearing outer tube (4)
External screw thread, internal screw thread is connected with external screw thread matching on head end connector on pressure-bearing outer tube (4), and head end connector protrudes into outside pressure-bearing
It manages and is provided with O-ring seal (8) between the one end and pressure-bearing outer tube (4) of (4)；
The end connector is connected with block head welded seal.
7. a kind of downhole video instrument as described in claim 1, which is characterized in that the center stepped hole is far from pressure-bearing outer tube
(4) it is provided with an annular groove on one end, an annular retaining ring is provided in the annular groove, the internal diameter of annular retaining ring is greater than camera lens (6)
Diameter, and be less than window glass (12) outer diameter；The window glass (12) is offseted by washer and annular retaining ring.
8. a kind of downhole video instrument as described in claim 1-7 any one, which is characterized in that the block head is far from pressure-bearing
Circumferential direction on one end of outer tube (4) along center stepped hole is removably provided with several lighting devices.
9. a kind of downhole video instrument as claimed in claim 8, which is characterized in that the lighting device is LED light group (11),
LED light group (11) is high color temperature lamp or low color temperature lamp or high color temperature lamp and the setting of low color temperature lamp interval.
10. a kind of downhole video instrument as claimed in claim 9, which is characterized in that described image sensor (5) is by across tune
The photoelectric compound cable of section set (3) and absorber (1) is connected with external signal receiving instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652282.6A CN110242282B (en) | 2019-07-19 | 2019-07-19 | Underground video instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652282.6A CN110242282B (en) | 2019-07-19 | 2019-07-19 | Underground video instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110242282A true CN110242282A (en) | 2019-09-17 |
| CN110242282B CN110242282B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910652282.6A Active CN110242282B (en) | 2019-07-19 | 2019-07-19 | Underground video instrument |
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| Country | Link |
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| CN (1) | CN110242282B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117005847A (en) * | 2023-10-07 | 2023-11-07 | 西安正实智能科技有限公司 | Oil-gas well perforation visualization quantitative detection device adopting ultra-wide angle lens |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996041066A1 (en) * | 1995-06-07 | 1996-12-19 | Dhv International, Inc. | Logging system combining video camera and sensors for environmental downhole conditions |
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