WO1999044367A1 - Single camera video inspection system for water wells and bore holes - Google Patents
Single camera video inspection system for water wells and bore holes Download PDFInfo
- Publication number
- WO1999044367A1 WO1999044367A1 PCT/US1999/004357 US9904357W WO9944367A1 WO 1999044367 A1 WO1999044367 A1 WO 1999044367A1 US 9904357 W US9904357 W US 9904357W WO 9944367 A1 WO9944367 A1 WO 9944367A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- camera
- operable
- image
- inspection system
- image sensor
- Prior art date
Links
- 238000007689 inspection Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 16
- 238000000034 method Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 3
- 238000000429 assembly Methods 0.000 claims 3
- 238000009434 installation Methods 0.000 claims 3
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 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
- E21B47/002—Survey of boreholes or wells by visual inspection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/185—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source from a mobile camera, e.g. for remote control
Definitions
- This invention relates generally to inspection tools and more particularly to a video inspection system for passages such as water wells and bore holes.
- a down hole inspection might also be used to located lost or damaged pumps or tools. By capturing the inspection of a borehole or water well on a video tape, a record of the well's condition can be captured and saved.
- the down hole tool has a single camera which allows for downward viewing only. This eliminates the possibility of examining the sides of a wall or a bore hole.
- Patent No. 5,652,617 entitled “Side Scan Down Hole Tool Having Two Cameras” and issued to Barbour on May 31, 1996.
- This system includes one camera pointed straight down the bore hole and operable to view down the hole and a second camera mounted to provide a close up of the side of the borehole.
- One drawback of this system is that an added camera involves added expense, additional complexity and takes-up additional space.
- a need has arisen for a single camera video inspection tool for water wells, bore holes or other passages.
- a single camera video inspection tool is provided that substantially eliminates or reduces the disadvantages of previous inspection tools.
- a system for video inspection of a bore hole includes a carrying case having a deep housing and a removable cover with a spool of coaxial cable stored inside the carrying case.
- the coaxial cable exits the carrying case at an opening.
- a cable arm attached to the carrying case and supported by an adjustable leg has the coaxial cable pass over it.
- Attached to the end of the coaxial cable is a camera assembly.
- the camera assembly includes a single camera operable to capture an image in a first direction along a long axis and a second direction, ninety degrees off set from the first direction.
- a down hole tool for video inspection is provided.
- the camera includes a first image sensor operable to acquire an image in a first direction along a first axis and a second image sensor operable to acquire an image in a second direction essentially perpendicular to the first direction. Also included is a 3
- a down hole tool for video inspection includes an image sensor in a housing operable to capture an image in a first direction parallel to a first axis.
- the image sensor is further able to capture an image in a second direction.
- the second direction is approximately perpendicular to the first direction.
- a camera board and processor coupled to the image sensor and operable to process the image and prepare it for display.
- the present invention provides various technical advantages over current methods. For example, a single camera can be used to view downward images and side images, reducing the size and bulk of the camera assembly. Also, an inspection tool is provided that can be easily transported. Other technical advantages may be readily apparent to one skilled in the art from the following figures, descriptions and claims.
- FIGURE 1 illustrates a system for inspecting bore holes and water wells
- FIGURE 2 illustrates a carry case in accordance with the teachings of the present invention
- FIGURE 3 illustrates a control system and monitor in accordance with the teachings of the present invention
- FIGURE 4 illustrates a cable winder in accordance with the teachings of the present invention
- FIGURE 5 illustrates a cable arm encoder in accordance with the teachings of the present invention
- FIGURE 6 illustrates a single camera assembly in accordance with the teachings of the present invention
- FIGURE 7 illustrates a two camera system in accordance with the teachings of the present invention.
- FIGURES 8A, 8B, and 8C illustrate a one camera system in accordance with the teachings of the present invention
- FIGURE 9 illustrates a close-up view of the lower section of the one camera system in accordance with the teachings of the present invention.
- FIGURE 10 illustrates a single camera system having multiple image sensors in accordance with the teachings of the present invention.
- FIGURES 1 through 10 of the drawings like numerals being used for like and corresponding parts of the various drawings.
- FIGURE 1 illustrates a system for using a video inspection system in accordance with the teachings of the present invention.
- System 10 includes a carrying case 1 which includes a deep housing 12 and a removable cover 14.
- Carrying case 1 also includes a spool 16 of coaxial cable 18.
- Coaxial cable 18 is fed through carrying case 1 and over a cable arm 20 which is supported by an adjustable leg 22.
- the end of coaxial cable 18 is attached to down hole camera assembly 24, which will be discussed in detail in conjunction with FIGURES 6 through 10.
- Coaxial cable 18 can be equipped with a quick disconnect 26. One half of the quick disconnect is mounted to coaxial cable 18 and the other half near the top of camera assembly 24. This 5
- Camera assembly 24 in one embodiment, is constructed of stainless steel which is water sealed to at least a depth of 2300 feet at an approximate pressure of 1000 pounds per square inch.
- down hole camera assembly 24 is lowered into a well or bore hole 2 that needs inspecting.
- Bore hole 2 can be a well water hole, a natural gas or oil well, a hole produced at a construction site, a hole produced when taking a core sample or any other hole in the ground that needs to be investigated.
- Coaxial cable 18 is fed from through housing 12 and over cable arm 20 as camera system 24 is lowered. Depth information and video from camera assembly 24 are displayed on a monitor 5 located in housing 12. Further details on the operation of system 10 are provided in FIGURES 2-10.
- the complete system is made up of five subassemblies .
- the carrying case which is illustrated in FIGURE 2, the control system and monitor, which is illustrated in FIGURE 3, the cable winder, illustrated in FIGURE 4, the cable arm encoder illustrated in FIGURE 5 and variations of the cameras illustrated in FIGURES 6-10.
- FIGURE 2 illustrates the carrying case 1 in accordance with the teaching of the present invention. Illustrated is a deep housing 12 which contains a spool 16 of coaxial cable 18 as well as electronic equipment that will be discussed in conjunction with FIGURE 3. Attached to deep housing 12 is a removable cover 14 which can close to provide a water-tight seal. Also illustrated is opening 13 6
- Carry case 1 can be mounted to a pickup truck or van. Alternatively, carrying case 1 can be transported to a site by manual labor.
- FIGURE 3 illustrates a control system 9 and monitor
- Control system 9 includes a monitor 5. Also pictured are a depth gauge 11 which can display the depth of camera assembly 24. Also included are electronics 7 which provides for control of the camera, control of the power supply, control of monitor 5 and control of or regulation of any other electronic system. Monitor control electronics, power supply electronics and camera control electronics are well known to those skilled in the art. The entire unit is mounted on a rail 3 for easy removal. Monitor 5 is operable to display the output of camera assembly 24. It also is operable to display the depth of camera assembly 24. Additionally, monitor 5 can include an integrated video tape recorder or can attach to an external video tape recorder or similar storage device for recording what is displayed on monitor 5. Monitor 5 can also be attached to a video printer, not pictured, which can provide pictures of the display.
- FIGURE 4 illustrates a cable winder in accordance with the teaching of the present invention.
- Cable winder 13 includes spool 16 of coaxial cable 18.
- Spool 16 is controlled by a motor 17 which is linked to spool 16 via a chain or belt.
- motor 17 which is a reversible motor
- Motor 17 controls are mounted on control system 9 and can be lowered and raised by an operator.
- FIGURE 5 illustrates a cable arm encoder in accordance with the teaching of the present invention. Illustrated is 7
- cable arm 20 which can be supported by adjustable leg 22. Also included is an encoder pulley 23 which is attached to electronic encoder shaft 25. As coaxial cable 18 moves along encoder pulley 23, encoder shaft 25 turns. The number of turns can then be used to determine the amount of cable sent in terms of linear feet or linear meters as is well known to those of skill in the art. The result can be displayed directly onto monitor 5. Also included on cable arm 20 is support pulley 29, which is used to support the cable and camera assembly 24 as it is conveyed along the passage. Encoder shaft 25 could be mounted on to support pulley 29.
- FIGURE 6 illustrate a single camera in accordance with the teachings of the present invention.
- Single camera 30 includes one or more image sensors 32 coupled to a single camera board and processor 34.
- a single camera may have multiple image sensors 32 but only one camera board and processor.
- Image sensors can be charged coupled devices
- CCD sensors such as the Sony ICX086AK, or can be other types of sensors such as CMOS sensors.
- a switch is provided to allow switching between image sensors 32.
- Switch 36 can be any type of electronic switch and can be fiber optic switches as well.
- optics 38 which are used to focus the image on image sensor 32.
- Optics 38 can be of fixed focal length, typically providing a wide angle view, or can be of variable focal length in order to provide a zoom feature.
- a zoom feature can also be provided electronically, by manipulation of the image captured by image sensor 32.
- FIGURE 7 illustrates a double camera embodiment of the present invention. Illustrated in FIGURE 7 is a coaxial cable 18 attached to an upper housing of camera assembly 24. Upper housing 40 of camera assembly 24 includes two 8
- Lower housing 41 of camera assembly 24 includes a down view camera 54 and a side view camera 52.
- Side view camera 52 is mounted approximately 90 degrees from down view camera 54.
- Down view camera 54 is operable to view down a long axis of a bore hole or water well while side view camera 52, views along a plane approximately perpendicular to the long axis of the bore hole.
- Illumination for the cameras is provided by high intensity lights 50 with two located on the side and three located on the lower face of the housing and associated with down camera 54.
- the lower housing is mounted in such a way that side view camera 52 can be rotated while downward view camera 54 stays fixed.
- Side view camera 52 is rotated by means of a stepper motor 48.
- Camera assembly 24 is lowered into a well or bore hole by means of coaxial cable 18 stored on a motor driven spool 16 bolted into housing. As coaxial cable 18 is unwound or wound, it threads a level wind mechanism 19 which maintains an even distribution of the cable 18 over the spool 16.
- the video is displayed on the monitor 5 and viewed by the operator at the surface.
- a user would switch between down view camera 54 and side view camera 52 depending on what view was needed.
- Side view camera 52 can also be rotated 360 degrees for enhanced viewing.
- the display of monitor 5 can be split into two or more windows . Part of the display could show the view of down view camera 54 while another part could display the view of side camera 52.
- the down view camera 54 image is fixed while the side view camera 52 can provide a moving image of the condition of the sides of a bore hole or similar structure. An operator can then see down hole problems, make note of the depth or provide a voice-over narration on the tape using a microphone input (not shown) which can be provided as part of the video tape recorder.
- FIGURES 8A, 8B, and 8C illustrate a single-camera system with a single image sensor.
- Camera assembly 24 consists of an upper section 56a and a lower section 56b.
- Upper section 56a comprises camera control board 34 along with an electronic interface control 61 which ties the camera system to the master control panel as illustrated in FIGURE 3, through the coaxial cable 18.
- the housing 58, 60 of upper section 56a in one embodiment is constructed of stainless steel which is water sealed to at least a depth of 2300 feet at an approximate pressure of 1000 pounds per square inch.
- Lower section 56b of camera assembly 24, is comprised of two parts, an upper part 66 coupled to a lower part 68.
- Upper part 66 and lower part 68 are coupled by a pair of pivot arms 74 and 76, which are rigidly mounted to upper part 66 and lower part 68 by pivot shafts. This connection allows lower part 68 to be suspended and able to rotate 90 degrees from a vertical to a horizontal position.
- Upper part 66 is coupled to upper section 56a by a hollow shaft 64 which may be rotated by a stepper motor 62 located in upper section 56a.
- Coaxial cable 18 and other cables are routed from upper section 56a to lower section 56b via hollow shaft 64.
- FIGURES 8B and 8C illustrate lower section 56b of camera 60.
- lower section 56b contains a high torque dc motor 78 which is connected to a chain and sprocket system 80 as illustrated in FIGURE 8C. 10
- Chain and sprocket system 80 are mounted within one of the pivot arms 74. Chain and sprocket system 80 are therefore connecting upper part 66 with lower part 68.
- Second pivot arm 76 provides a path for routing coaxial cable 56 and other electronic cables from hollow shaft 64 through upper part 66 of lower section 51b to lower part 68 of lower section 51b in order to provide power to a video camera 70, a plurality of lights 72, and pivot switches (not pictured) contained in lower part 68.
- Lower part 68 comprises the camera enclosure which contains a single image sensor 70 with a wide-angle lens. Image sensor 70 typically includes a CCD-type image sensor.
- Lower part 68 also includes three high intensity lights 72, which can be adjusted to provide for a variety of brightness levels.
- lights 72 may be set for a variety of voltages to display a variety of brightness levels.
- Down position is achieved when the image sensor is pointing down the bore hole or passage along an axis parallel to the long axis of the bore hole. This is a first position.
- the second position is ninety degrees off-set from the first position and is the side-view position.
- the voltage supplied to lights 72 are automatically switched to a lower setting in order to reduce the brightness caused by reflection off of the wall of the passage, particularly when camera system 60 is used in white PVC casing.
- lower part 68 When image sensor 70 is in side-view mode, lower part 68 is operable to rotate a full 360 degrees around the first axis to view the side wall of the bore hole or well casing. The rotation is controlled at the control panel as illustrated in earlier figures and allows for image sensor 70 to be started, stopped and reversed to a complete 360 degrees while in a side-view mode. Image sensor 70 can capture an image at any angle between the down position and the side-view position. 11
- FIGURE 9 illustrates a close-up view of lower section 56b of camera system 60. Illustrated in upper section 66 coupled to lower section 68 by pivot arms 74 and 76. Also, illustrated is chain and sprocket system- 80 as housed inside pivot arm 74. As mentioned before, chain and sprocket system allows lower section 68 to be moved from a horizontal to a vertical position to allow both down hole view and side viewing.
- camera assembly 24 is lowered into a passage such as a well, pipe, pipeline, bore hole, tank, pit or any other fluid containment system.
- electronic devices 25 measures the linear feed of cable deployed which is recorded in order to indicate depth of camera assembly 24 on the video tape. This allows the depth reading to be shown on a monitor for continuous viewing.
- the operator of camera assembly 24 can control the positioning of lower section 68 if the operator wishes to only view straight down the bore hole or other opening, lower section 68 can be set to stay in the down position.
- a signal can be sent from the operator to lower section 56b and lower part 68 can be rotated 90 degrees to a side view position via a pivoting means 80.
- Pivoting means 80 may include a chain and sprocket assembly, a belt driven assembly, a direct gear assembly or similar means to pivot lower part 68.
- the entire lower section 56b may be rotated 360 degrees for viewing all of the side of a bore hole or other opening by use of stepper motor 62 and 64.
- the 360 degree rotation can be started, stopped, or reversed in any order that the operator needs.
- the advantage of this system is that only one camera is used and there is no need to switch between a down view camera and a side-view camera. 12
- FIGURE 10 illustrates a single camera with a multiple image sensor down-hole camera in accordance with the teachings of the present invention.
- Camera assembly 24 has at least one down image sensor 82 operable to capture a view downward along a first axis and one side image sensor 84 operable to capture an image along a plane essentially ninety degrees from down camera 82.
- Down image sensor 82 and side image sensor 84 are coupled to a single camera board 34, forming a single camera with multiple image sensors.
- Side image sensor 84 can be mounted in such a way that it can rotate 360 degrees around camera assembly 24.
- all or part of camera assembly 24 can be made to rotate in such a way that side image sensors 84 can capture an image in a complete 360 degree circle around the inside of a bore hole or well.
- a number of side image sensors 84 can be placed around camera assembly 24 in such a way that the entire side of a bore hole can be viewed by simply switching side view image sensors 84 to view the appropriate sections.
- camera board and processor 34 can display all of the outputs from side view image sensors 84 together on a display, thus giving an instantaneous three hundred and sixty degree view without rotating camera assembly 24. While the embodiments discussed in conjunction with
- FIGURES 1-10 discuss the use of the present invention in bore holes and the like, the present invention can also be used in pipelines and the like that have substantial horizontal runs. In this case, down view would be along a long axis of the pipeline.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Signal Processing (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Multimedia (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Studio Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002321546A CA2321546A1 (en) | 1998-02-27 | 1999-02-26 | Single camera video inspection system for water wells and bore holes |
AU31821/99A AU3182199A (en) | 1998-02-27 | 1999-02-26 | Single camera video inspection system for water wells and bore holes |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7631298P | 1998-02-27 | 1998-02-27 | |
US60/076,312 | 1998-02-27 | ||
US8982498P | 1998-06-19 | 1998-06-19 | |
US60/089,824 | 1998-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999044367A1 true WO1999044367A1 (en) | 1999-09-02 |
Family
ID=26757950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/004357 WO1999044367A1 (en) | 1998-02-27 | 1999-02-26 | Single camera video inspection system for water wells and bore holes |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3182199A (en) |
CA (1) | CA2321546A1 (en) |
WO (1) | WO1999044367A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2343893A1 (en) * | 2010-01-11 | 2011-07-13 | Emerson Electric Co. | Camera manipulating device for video inspection system |
CN103015977A (en) * | 2012-12-11 | 2013-04-03 | 武汉科技大学 | Panoramic video scanning device for jack shaft |
WO2012042353A3 (en) * | 2010-09-29 | 2013-06-20 | Schlumberger Technology B.V. | Imaging methods and systems for downhole fluid analysis |
WO2013128396A1 (en) * | 2012-02-28 | 2013-09-06 | Smart Applications Limited | Inspection and repair module |
WO2018134614A1 (en) * | 2017-01-20 | 2018-07-26 | E.V. Offshore Limited | Inspection assembly viewport |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4532545A (en) * | 1983-08-29 | 1985-07-30 | Hanson Lowell C | Subteranean surveying apparatus |
GB2210530A (en) * | 1987-09-28 | 1989-06-07 | Pearpoint Ltd | T.V. camera with tilt/pan effect |
US5134471A (en) * | 1991-05-06 | 1992-07-28 | Noranda Inc. | System for monitoring the walls of a borehole using a video camera |
EP0765086A2 (en) * | 1995-09-21 | 1997-03-26 | AT&T Corp. | Video camera including multiple image sensors |
US5652617A (en) | 1995-06-06 | 1997-07-29 | Barbour; Joel | Side scan down hole video tool having two camera |
-
1999
- 1999-02-26 AU AU31821/99A patent/AU3182199A/en not_active Abandoned
- 1999-02-26 WO PCT/US1999/004357 patent/WO1999044367A1/en active Application Filing
- 1999-02-26 CA CA002321546A patent/CA2321546A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4532545A (en) * | 1983-08-29 | 1985-07-30 | Hanson Lowell C | Subteranean surveying apparatus |
GB2210530A (en) * | 1987-09-28 | 1989-06-07 | Pearpoint Ltd | T.V. camera with tilt/pan effect |
US5134471A (en) * | 1991-05-06 | 1992-07-28 | Noranda Inc. | System for monitoring the walls of a borehole using a video camera |
US5652617A (en) | 1995-06-06 | 1997-07-29 | Barbour; Joel | Side scan down hole video tool having two camera |
EP0765086A2 (en) * | 1995-09-21 | 1997-03-26 | AT&T Corp. | Video camera including multiple image sensors |
Non-Patent Citations (1)
Title |
---|
L. GAY ET AL.: "Contribution to reservoir behaviour appraisal by television", SPE, no. 3749, 17 May 1972 (1972-05-17), dallas, pages 1 - 8, XP002107499 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2343893A1 (en) * | 2010-01-11 | 2011-07-13 | Emerson Electric Co. | Camera manipulating device for video inspection system |
WO2012042353A3 (en) * | 2010-09-29 | 2013-06-20 | Schlumberger Technology B.V. | Imaging methods and systems for downhole fluid analysis |
US8483445B2 (en) | 2010-09-29 | 2013-07-09 | Schlumberger Technology Corporation | Imaging methods and systems for downhole fluid analysis |
WO2013128396A1 (en) * | 2012-02-28 | 2013-09-06 | Smart Applications Limited | Inspection and repair module |
TWI576579B (en) * | 2012-02-28 | 2017-04-01 | 智慧應用有限公司 | Inspection and repair module and system and inspection method |
US9746429B2 (en) | 2012-02-28 | 2017-08-29 | Smart Applications Limited | Inspection and repair module |
EA034842B1 (en) * | 2012-02-28 | 2020-03-27 | Смарт Эппликейшнз Лимитед | Inspection and repair module |
CN103015977A (en) * | 2012-12-11 | 2013-04-03 | 武汉科技大学 | Panoramic video scanning device for jack shaft |
WO2018134614A1 (en) * | 2017-01-20 | 2018-07-26 | E.V. Offshore Limited | Inspection assembly viewport |
US11215917B2 (en) | 2017-01-20 | 2022-01-04 | E.V. Offshore Limited | Inspection assembly viewport |
Also Published As
Publication number | Publication date |
---|---|
CA2321546A1 (en) | 1999-09-02 |
AU3182199A (en) | 1999-09-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7002620B1 (en) | Single camera video inspection system for water wells and bore holes | |
US9277105B2 (en) | Self-leveling camera heads | |
US6538732B1 (en) | Inspection system and method | |
US8279278B2 (en) | Apparatus for photographing pipe without suspension of water supply and system for controlling the same | |
WO2003025536A3 (en) | Video inspection apparatus | |
US5689734A (en) | Pressurized camera system | |
US20200173879A1 (en) | Systems and methods for inspecting pipelines using a robotic imaging system | |
JP2007114079A (en) | Subsidence measuring technique and device thereof | |
US20060066847A1 (en) | Inspection apparatus | |
US3974330A (en) | Miniature underwater bore hole inspection apparatus | |
CN109356206A (en) | A kind of underwater detection device of bridge pile foundation can be suitably used for different shape and size | |
WO1999044367A1 (en) | Single camera video inspection system for water wells and bore holes | |
KR100936469B1 (en) | Data collection system | |
KR100611355B1 (en) | Inspection Apparatus for Water Pipeline | |
WO1996030719A1 (en) | Device for observing inner wall surface of conduit | |
KR102192341B1 (en) | Moving shot based structure inspection apparatus using smartphone | |
EP3798622B1 (en) | Systems and methods for inspecting pipelines using a robotic imaging system | |
MXPA00008308A (en) | Single camera video inspection system for water wells and bore holes | |
AU2014218432A1 (en) | An Inspection Device And System | |
EP0968612A1 (en) | Apparatus and methods for remote inspection of structure facades | |
JPH08201297A (en) | Device for inspecting inside of receiving tank | |
JP2003035538A (en) | Thin display screen type theodolite | |
US4915073A (en) | Boiler tube wall inspection system | |
JP3447282B1 (en) | Camera device for well | |
Chezar et al. | A new look at deep-sea video |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AT AU AZ BA BB BG BR BY CA CH CN CU CZ CZ DE DE DK DK EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT UA UG UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: PA/a/2000/008308 Country of ref document: MX |
|
ENP | Entry into the national phase |
Ref document number: 2321546 Country of ref document: CA Ref country code: CA Ref document number: 2321546 Kind code of ref document: A Format of ref document f/p: F |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
122 | Ep: pct application non-entry in european phase |