CA2339679A1 - Device for measuring and nondestructive inspection of the material of a pipeline - Google Patents
Device for measuring and nondestructive inspection of the material of a pipeline Download PDFInfo
- Publication number
- CA2339679A1 CA2339679A1 CA002339679A CA2339679A CA2339679A1 CA 2339679 A1 CA2339679 A1 CA 2339679A1 CA 002339679 A CA002339679 A CA 002339679A CA 2339679 A CA2339679 A CA 2339679A CA 2339679 A1 CA2339679 A1 CA 2339679A1
- Authority
- CA
- Canada
- Prior art keywords
- pipeline
- carrier
- sensors
- recess
- side walls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/30—Inspecting, measuring or testing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Abstract
The present invention relates to a device intended for measuring and for checking without causing any damage the material of a duct (1). This device includes a cylindrical support (3) for sensors (20) which is made of a resilient material and which has an outer diameter slightly larger than the inner diameter of the duct (1). The support (3) is made in the form of a series of holders (15) which are connected to each other on a common flange (16) and which are spring-loaded in a radial direction. Each holder comprise s a longitudinal recess (22) in which sensors (20) are arranged. The recess (2 2) and the wall of the duct (1) define together a channel which is opened at th e rear portion of the holder (15). The front wall (24) of the recess (22) has an L-shaped cross section, while the side walls (25) are provided on their periphery with plates (26) made of a resilient material and slightly extendi ng beyond the peripheral sections of said side walls (25). The thickness of the side walls is larger than the thickness of the front wall (24) and of the si de plates (26). This devices further includes at least one sealed body (2) whic h is hinged to the support (3) and bears information processing means connecte d to the sensors (20), as well as a power supply unit.
Description
DEVICE FOR MEASURING AND NONDESTRUCTIVE INSPECTION
OF THE MATERIAL OF A PIPELINE
Technical Field The present invention relates to devices for inspecting pipelines for condition, namely, to a device for measuring and nondestructive inspection of the material of a pipeline.
The invention can find most utility when applied for inspecting pipelines that transfer petroleum and petroleum products.
In addition, the invention is applicable for inspecting pipelines handling any other fluid, such as water.
Background Art To avoid troubles during operation of pipelines, their walls are checked for intactness and proper thickness. At present there are in widespread use the so-called "intellectual" intrapipeline inspection apparatus. As a rule such apparatus move along the pipeline transferring the fluid being handled and perform diverse measurements. It is most frequently that the thickness of the pipeline wall is measured in order to reveal local corrosion, loss of metal of the wall due to mechanical damages, large-area corrosion, and so on. Depending on the aim of inspection use is made of sensors of different types, e.g., electro-optical, ultrasonic, etc.
Reliability of measurement is to a great extent influenced by the fact that when moving within the pipeline the sensors come out of contact with the pipe wall due to varying geometry of the inner wall surface.
One prior-art device for measuring and nondestructive inspection of the pipeline material is known (c~ DE 36 26 646 A1) to comprise a cylinder-shaped carrier of the sensors which are arranged along the periphery thereof. The carrier is made of an elastic material and appears as a number of interconnected radially spring-loaded holders. The carrier outside diameter somewhat exceeds the pipeline inside diameter. Each holder has a longitudinal recess accommodating the sensors. Said recess constitutes, together with the pipeline inner wall (when the device is placed within the pipeline), a passage which opens towards the carrier tail portion. The device also comprises a hermetically sealed housing which is articulated to the carrier and bears data processing means connected to said sensors, as well as a power supply unit.
The device discussed above operates as follows.
The device placed within the pipeline being inspected moves along with the fluid being transferred and measures the pipeline wall thickness. However, in the course of operation of the device the sensors get coated with a sediment, whereby reliability of measurements is badly impaired and a large number of flaws on the pipeline walls are missed and thus escape detection.
One more prior-art device for measuring and undestructible inspection of the pipeline material is known (c~ Operating manual of the device "Pipetronix Ultrascan 28"/32" Version (II)" available from Pipetronix Co. (Germany) to comprise a cylinder-shaped carrier of sensors arranged along the periphery thereof. The carrier is made of an elastic material and appears as a number of interconnected radially spring-loaded holders.
The carrier outside diameter somewhat exceeds the pipeline inside diameter.
Each holder has a longitudinal recess accommodating the sensors. Said recess constitutes, together with the pipeline inner wall (when the device is placed within the pipeline), a passage which opens towards the carrier tail portion. The device also comprises a hermetically sealed housing which is provided with perforated cuffs, is articulated to the carrier, and bears data processing means connected to said sensors, as well as a power supply unit.
The recess of each holder communicates with the respective perforation in the tail cuff of the housing via a flexible conduit.
The device operates as follows.
The device placed within the pipeline being inspected moves along with the fluid being transferred and measures the pipeline wall thickness. The flow of the fluid being transferred passes consecutively along the passages of the earner, flexible conduits, and perforations in the cuffs in the direction from the carrier tail portion towards the head portion of the housing.
However, when moving within the pipeline holders together with the sensors come out of contact with the pipeline wall due to varying geometry of the inner wall surface, as well as on the bent pipeline sections and due to corrugations on the pipeline inner surface. As a result, suspended matter disposed round the holders makes its way into the carrier passages. It is due to the fact that a maximum density of the suspended matter occurs near the pipeline walls, and the space between the sensors is washed-through but insufficiently, reliability of measurements is affected adversely which in turn prevents detecting a great deal of flaws on the pipeline walls.
Disclosure of the Invention It is a principal object of the present invention to provide a device for measuring and nondestructive inspection of the material of a pipeline, wherein the carrier has a construction arrangement capable of attaining a snug fit of the holder edges against the pipeline wall irrespective of a varying wall profile.
The foregoing object is accomplished due to the fact that in a device for measuring and nondestructive inspection of the material of a pipeline comprising a cylinder-shaped carrier of sensors arranged along the periphery thereof, said carrier being made of an elastic material and having its outside diameter somewhat exceeding the pipeline inside diameter, which carrier appears as a number of interconnected radially spring-loaded holders, each of said holders having a longitudinal recess accommodating the sensors, and at least one hermetically sealed housing articulated to the carrier and bearing data processing means connected to the sensors, as well as a power supply unit, according to the invention, the forward wall of the recess of each holder of the carrier has an L-shaped cross-section, while the side walls thereof are provided with peripherally disposed plates made of an elastic material and somewhat extending beyond the edges of said side walls the thickness of which exceeds the thickness of the forward wall and of the plates of said recess.
According to the present invention, the L-shape of the forward wall of the recess, as well as the provision of the plates on the side walls thereof provides for, when the geometry of the pipeline inner surface is varied (i.e., in case of a depression or corrugation) a snug fit of the carried edges against the pipeline surface due to plasticity of the forward wall of the recess and of the plates of the side walls thereof, as well as due to a small thickness of said forward wall and said plates. When the pipeline inner surface changes its shape the forward wall of the recess and the plates of the side walls thereof are deformed so as to follow the changed shape of the pipeline inner surface.
In a preferred embodiment of the invention the thickness of the side walls of the recess is a few times that of the forward wall and of the plates of said recess.
OF THE MATERIAL OF A PIPELINE
Technical Field The present invention relates to devices for inspecting pipelines for condition, namely, to a device for measuring and nondestructive inspection of the material of a pipeline.
The invention can find most utility when applied for inspecting pipelines that transfer petroleum and petroleum products.
In addition, the invention is applicable for inspecting pipelines handling any other fluid, such as water.
Background Art To avoid troubles during operation of pipelines, their walls are checked for intactness and proper thickness. At present there are in widespread use the so-called "intellectual" intrapipeline inspection apparatus. As a rule such apparatus move along the pipeline transferring the fluid being handled and perform diverse measurements. It is most frequently that the thickness of the pipeline wall is measured in order to reveal local corrosion, loss of metal of the wall due to mechanical damages, large-area corrosion, and so on. Depending on the aim of inspection use is made of sensors of different types, e.g., electro-optical, ultrasonic, etc.
Reliability of measurement is to a great extent influenced by the fact that when moving within the pipeline the sensors come out of contact with the pipe wall due to varying geometry of the inner wall surface.
One prior-art device for measuring and nondestructive inspection of the pipeline material is known (c~ DE 36 26 646 A1) to comprise a cylinder-shaped carrier of the sensors which are arranged along the periphery thereof. The carrier is made of an elastic material and appears as a number of interconnected radially spring-loaded holders. The carrier outside diameter somewhat exceeds the pipeline inside diameter. Each holder has a longitudinal recess accommodating the sensors. Said recess constitutes, together with the pipeline inner wall (when the device is placed within the pipeline), a passage which opens towards the carrier tail portion. The device also comprises a hermetically sealed housing which is articulated to the carrier and bears data processing means connected to said sensors, as well as a power supply unit.
The device discussed above operates as follows.
The device placed within the pipeline being inspected moves along with the fluid being transferred and measures the pipeline wall thickness. However, in the course of operation of the device the sensors get coated with a sediment, whereby reliability of measurements is badly impaired and a large number of flaws on the pipeline walls are missed and thus escape detection.
One more prior-art device for measuring and undestructible inspection of the pipeline material is known (c~ Operating manual of the device "Pipetronix Ultrascan 28"/32" Version (II)" available from Pipetronix Co. (Germany) to comprise a cylinder-shaped carrier of sensors arranged along the periphery thereof. The carrier is made of an elastic material and appears as a number of interconnected radially spring-loaded holders.
The carrier outside diameter somewhat exceeds the pipeline inside diameter.
Each holder has a longitudinal recess accommodating the sensors. Said recess constitutes, together with the pipeline inner wall (when the device is placed within the pipeline), a passage which opens towards the carrier tail portion. The device also comprises a hermetically sealed housing which is provided with perforated cuffs, is articulated to the carrier, and bears data processing means connected to said sensors, as well as a power supply unit.
The recess of each holder communicates with the respective perforation in the tail cuff of the housing via a flexible conduit.
The device operates as follows.
The device placed within the pipeline being inspected moves along with the fluid being transferred and measures the pipeline wall thickness. The flow of the fluid being transferred passes consecutively along the passages of the earner, flexible conduits, and perforations in the cuffs in the direction from the carrier tail portion towards the head portion of the housing.
However, when moving within the pipeline holders together with the sensors come out of contact with the pipeline wall due to varying geometry of the inner wall surface, as well as on the bent pipeline sections and due to corrugations on the pipeline inner surface. As a result, suspended matter disposed round the holders makes its way into the carrier passages. It is due to the fact that a maximum density of the suspended matter occurs near the pipeline walls, and the space between the sensors is washed-through but insufficiently, reliability of measurements is affected adversely which in turn prevents detecting a great deal of flaws on the pipeline walls.
Disclosure of the Invention It is a principal object of the present invention to provide a device for measuring and nondestructive inspection of the material of a pipeline, wherein the carrier has a construction arrangement capable of attaining a snug fit of the holder edges against the pipeline wall irrespective of a varying wall profile.
The foregoing object is accomplished due to the fact that in a device for measuring and nondestructive inspection of the material of a pipeline comprising a cylinder-shaped carrier of sensors arranged along the periphery thereof, said carrier being made of an elastic material and having its outside diameter somewhat exceeding the pipeline inside diameter, which carrier appears as a number of interconnected radially spring-loaded holders, each of said holders having a longitudinal recess accommodating the sensors, and at least one hermetically sealed housing articulated to the carrier and bearing data processing means connected to the sensors, as well as a power supply unit, according to the invention, the forward wall of the recess of each holder of the carrier has an L-shaped cross-section, while the side walls thereof are provided with peripherally disposed plates made of an elastic material and somewhat extending beyond the edges of said side walls the thickness of which exceeds the thickness of the forward wall and of the plates of said recess.
According to the present invention, the L-shape of the forward wall of the recess, as well as the provision of the plates on the side walls thereof provides for, when the geometry of the pipeline inner surface is varied (i.e., in case of a depression or corrugation) a snug fit of the carried edges against the pipeline surface due to plasticity of the forward wall of the recess and of the plates of the side walls thereof, as well as due to a small thickness of said forward wall and said plates. When the pipeline inner surface changes its shape the forward wall of the recess and the plates of the side walls thereof are deformed so as to follow the changed shape of the pipeline inner surface.
In a preferred embodiment of the invention the thickness of the side walls of the recess is a few times that of the forward wall and of the plates of said recess.
Such an embodiment of the invention enables one to provide most efficiently a snug fit of the holder edges against the pipeline inner surface regardless of a change in the geometry thereof.
According to one of the embodiments of the present invention each holder is connected to a flange through two articulated joints.
Provision of two articulated joints makes it possible to eliminate mutual interference of the radial motion of the holder and flange, so that when the holder passes over the pipeline portion with, e.g., a corrugation, the holder is allowed to follow the shape of the corrugation with minimum deviations. Thus, a snugger of the holder edges against the pipeline wall is attained.
According to one of the embodiments of the invention the carrier is constituted by at least two sections articulated to each other, each of which accommodating the holders.
Such an embodiment of the invention makes possible a snugger fit of the holder edges against the pipeline wall when the device passes over pipeline bents having small bending radius, due to the fact that the holders are shorter, whereby approximation of a circle is performed more accurately.
Brief Description of the Drawings Further objects and advantages of the present invention will become apparent from a detailed description of an exemplary embodiment thereof and the accompanying drawings, wherein:
FIG.1 is a side view of the device, according to the invention;
FIG.2 is a general view of the carrier;
FIG.3 is a plan view of the carrier holder;
FIG.4 is a longitudinal sectional view of the holder; and FIGS is a section taken along the line V-V in FIG.3.
Best Method of Carrying Out the Invention The device for measuring and nondestructive inspection of the material of a pipeline (FIG.I) comprises a hermetically sealed housing 2 and a cylinder-shaped carrier 3. The housing 2 comprises three sections 4, 5, and 6 within which are accommodated data recording and processing means not shown), as well as a power supply unit. Cuffs 7, 8 are installed on the sections 4, 5 of the housing 2, the cuffs 7 being aimed at centering the housing 2 in the pipeline 1, as well as for advancing the device along with the fluid being transferred. The cuffs 8 are intended for centering the housing 2 in the pipeline 1;
they also serve as an additional support. The cuffs 7, 8 have perforations (not shown).
Disposed in the forward portion of the housing 2 is a protective bumper 9 within which the head of a marker transceiver (not shown) is disposed which is for locating the device in the pipeline l and for recording the signals sent by the marker situated off the pipeline, which promotes finding an exact position of the device. The sections 4, 5, and 6 of the housing 2 are connected to one another and to the carrier 3 through a universal joint 10.
The section 4 of the housing 2 mounts a system 11 for measuring the distance covered by the device. The earner 3 is constituted by two sections 12, 13 interconnected by an articulated joint 14 and is made of an elastic material such as rubber, its outside diameter somewhat exceeding the inside diameter of the pipeline 1. Each section 12, 13 comprises a number of holders 15 (FIG.2) which are attached to a flange 16 through elastic arms 17 having two articulated joints and additionally actuated by springs 19. Sensors 20, e.g., ultrasonic ones are held in the holders 15 of the carrier 3 along the periphery thereof, said sensors being used for measuring and nondestructive inspection, each of said sensors being connected, via a cable 21, to the data processing means provided in the sections 4, 5, and 6 of the housing 2. The housing 15 (FIG.3) is shaped as the sector of a cylinder, whereby a snug fit of the edges of the carrier 15 against the inner wall of the pipeline 1 is provided, as well as a continuous distance between the wall of the pipeline 1 and the sensor 20 and a continuous angularity of the sensors 20 relative to the wall of the pipeline 1. Each of the holders 15 has a recess 22 which together with the wall of the pipeline 1 form a passage that opens towards the tail portion of the holder 15. A hole 23 is provided in the holder 15 for the sensors 20 to attach. At its forward the recess 22 is confined to a forward wall 24 (FIG.4) which has an L-shaped cross-section which enables the edge of the forward wall 24 to move radially. At its sides the recess 22 is confined to side walls 25 (FIG.S) provided with peripherally arranged plates 26 made of an elastic material, e.g., rubber. The plates 26 somewhat extend beyond the peripheral portions of the side walls 25 whose thickness is a few times that of the plates 26 and of the forward wall 24 of the recess 22.
The device operates as follows.
According to one of the embodiments of the present invention each holder is connected to a flange through two articulated joints.
Provision of two articulated joints makes it possible to eliminate mutual interference of the radial motion of the holder and flange, so that when the holder passes over the pipeline portion with, e.g., a corrugation, the holder is allowed to follow the shape of the corrugation with minimum deviations. Thus, a snugger of the holder edges against the pipeline wall is attained.
According to one of the embodiments of the invention the carrier is constituted by at least two sections articulated to each other, each of which accommodating the holders.
Such an embodiment of the invention makes possible a snugger fit of the holder edges against the pipeline wall when the device passes over pipeline bents having small bending radius, due to the fact that the holders are shorter, whereby approximation of a circle is performed more accurately.
Brief Description of the Drawings Further objects and advantages of the present invention will become apparent from a detailed description of an exemplary embodiment thereof and the accompanying drawings, wherein:
FIG.1 is a side view of the device, according to the invention;
FIG.2 is a general view of the carrier;
FIG.3 is a plan view of the carrier holder;
FIG.4 is a longitudinal sectional view of the holder; and FIGS is a section taken along the line V-V in FIG.3.
Best Method of Carrying Out the Invention The device for measuring and nondestructive inspection of the material of a pipeline (FIG.I) comprises a hermetically sealed housing 2 and a cylinder-shaped carrier 3. The housing 2 comprises three sections 4, 5, and 6 within which are accommodated data recording and processing means not shown), as well as a power supply unit. Cuffs 7, 8 are installed on the sections 4, 5 of the housing 2, the cuffs 7 being aimed at centering the housing 2 in the pipeline 1, as well as for advancing the device along with the fluid being transferred. The cuffs 8 are intended for centering the housing 2 in the pipeline 1;
they also serve as an additional support. The cuffs 7, 8 have perforations (not shown).
Disposed in the forward portion of the housing 2 is a protective bumper 9 within which the head of a marker transceiver (not shown) is disposed which is for locating the device in the pipeline l and for recording the signals sent by the marker situated off the pipeline, which promotes finding an exact position of the device. The sections 4, 5, and 6 of the housing 2 are connected to one another and to the carrier 3 through a universal joint 10.
The section 4 of the housing 2 mounts a system 11 for measuring the distance covered by the device. The earner 3 is constituted by two sections 12, 13 interconnected by an articulated joint 14 and is made of an elastic material such as rubber, its outside diameter somewhat exceeding the inside diameter of the pipeline 1. Each section 12, 13 comprises a number of holders 15 (FIG.2) which are attached to a flange 16 through elastic arms 17 having two articulated joints and additionally actuated by springs 19. Sensors 20, e.g., ultrasonic ones are held in the holders 15 of the carrier 3 along the periphery thereof, said sensors being used for measuring and nondestructive inspection, each of said sensors being connected, via a cable 21, to the data processing means provided in the sections 4, 5, and 6 of the housing 2. The housing 15 (FIG.3) is shaped as the sector of a cylinder, whereby a snug fit of the edges of the carrier 15 against the inner wall of the pipeline 1 is provided, as well as a continuous distance between the wall of the pipeline 1 and the sensor 20 and a continuous angularity of the sensors 20 relative to the wall of the pipeline 1. Each of the holders 15 has a recess 22 which together with the wall of the pipeline 1 form a passage that opens towards the tail portion of the holder 15. A hole 23 is provided in the holder 15 for the sensors 20 to attach. At its forward the recess 22 is confined to a forward wall 24 (FIG.4) which has an L-shaped cross-section which enables the edge of the forward wall 24 to move radially. At its sides the recess 22 is confined to side walls 25 (FIG.S) provided with peripherally arranged plates 26 made of an elastic material, e.g., rubber. The plates 26 somewhat extend beyond the peripheral portions of the side walls 25 whose thickness is a few times that of the plates 26 and of the forward wall 24 of the recess 22.
The device operates as follows.
The device placed in the pipeline 1 being inspected travels along with the fluid being transferred and makes measurements. The flow of the fluid being handled gets in the recess 2 of each holder 15, while a continuous snug fitting of the side plates 26 and of the forward wall 24 of the recess 22 against the inner surface of the pipeline 1 is provided, whereby more reliable measuring results are obtainable. When the device passes over such obstacles as corrugations, the spring-actuated holders 15 assume the position as close to the inner surface of the pipeline 1 as possible. When passing over bents of the pipeline 1 having small bending radius, the articulated joint 14 of the carrier 3 provides for a snug fit of the edges of the holders 15 against the inner surface of the pipeline 1.
Industrial Applicability The invention can find most utility when applied for inspecting pipelines that transfer petroleum and petroleum products.
In addition, the invention is applicable for inspecting pipelines handling any other fluid, such as water.
Industrial Applicability The invention can find most utility when applied for inspecting pipelines that transfer petroleum and petroleum products.
In addition, the invention is applicable for inspecting pipelines handling any other fluid, such as water.
Claims (4)
1. A device for measuring and nondestructive inspection of the material of a pipeline comprising a cylinder-shaped carrier of sensors which are arranged along the periphery thereof, said carrier being made of an elastic material and having its outside diameter somewhat exceeding the inside diameter of the pipeline, which carrier appears as a number of interconnected radially spring-actuated holders, each of said holders having a longitudinal recess accommodating the sensors, and at least one hermetically sealed housing articulately mounted to the carrier and bearing data processing means connected to the sensors, as well as a power supply unit, wherein the forward wall of the recess of each holder of the carrier has an L-shaped cross-section, while side walls of the recess are provided with peripherally disposed plates made of an elastic material and somewhat extending beyond the edges of said side walls, the thickness of which exceeds the thickness of the forward wall and of the plates.
2. The device of claim 1, wherein the thickness of the side walls is a few times that of the forward wall and of the plates of the recess.
3. The device of claim 1, wherein each holder is connected to a flange through two articulated joints.
4. The device of claim 1, wherein the carrier comprises least two sections articulately connected to each other, each of which accommodates the holders.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU1998/000253 WO2000008377A1 (en) | 1998-08-04 | 1998-08-04 | Device for measuring and for checking with causing any damage the material of a duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2339679A1 true CA2339679A1 (en) | 2000-02-17 |
Family
ID=20130243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002339679A Abandoned CA2339679A1 (en) | 1998-08-04 | 1998-08-04 | Device for measuring and nondestructive inspection of the material of a pipeline |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2339679A1 (en) |
| WO (1) | WO2000008377A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7178418B2 (en) | 2002-03-12 | 2007-02-20 | Ndt Systems & Services Ag | Segment of a sensor-supporting element for a scraper-type device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3626646A1 (en) * | 1986-08-06 | 1988-02-18 | Pipetronix Gmbh | DEVICE FOR MEASURING AND NON-DESTRUCTIVE MATERIAL TESTING ON INSTALLED PIPELINES |
| FR2629898B1 (en) * | 1988-04-07 | 1990-08-03 | Sagem | MEASUREMENT PROBE FOR USE IN ESTABLISHING THE TOPOGRAPHIC SURVEY OF A NON-FREELY ACCESSIBLE TUBE |
| RU2068148C1 (en) * | 1994-04-04 | 1996-10-20 | Николай Николаевич Горохов | Instrument for pipe line inspection |
-
1998
- 1998-08-04 CA CA002339679A patent/CA2339679A1/en not_active Abandoned
- 1998-08-04 WO PCT/RU1998/000253 patent/WO2000008377A1/en active Search and Examination
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7178418B2 (en) | 2002-03-12 | 2007-02-20 | Ndt Systems & Services Ag | Segment of a sensor-supporting element for a scraper-type device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000008377A1 (en) | 2000-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |