GB1475538A - Pipeline signalling systems and techniques - Google Patents
Pipeline signalling systems and techniquesInfo
- Publication number
- GB1475538A GB1475538A GB3739374A GB3739374A GB1475538A GB 1475538 A GB1475538 A GB 1475538A GB 3739374 A GB3739374 A GB 3739374A GB 3739374 A GB3739374 A GB 3739374A GB 1475538 A GB1475538 A GB 1475538A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- pipeline
- pig
- techniques
- signalling systems
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
- G01V3/108—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils the emitter and the receiver coils or loops being uncoupled by positioning them perpendicularly to each other
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
1475538 Locating pipe line pigs TRANSCANADA PIPELINES Ltd 27 Aug 1974 [19 Sept 1973] 37393/74 Heading G1N A coil 13 is arranged outside a pipeline 11 so that its magnetic axis is approximately at right angles to that of the pipeline and is energized by A.C. from a source 15. The resulting magnetic field generated by eddy currents set up in the electrically conductive pipeline is detected by a coil 16 mounted on a pig 17 carrying a tape recorder 23, there being a "null" position when coil 16 is centred beneath coil 13 with a phase reversal on either side. A Hall effect device may replace coil 16. The coil 13 may be saddle-shaped to fit directly on the pipe. The arrangement may be used to control some function of the pig e.g. pipeline blocking at a selected location.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA181,449A CA980422A (en) | 1973-09-19 | 1973-09-19 | Pipeline signalling system and techniques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1475538A true GB1475538A (en) | 1977-06-01 |
Family
ID=4097847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3739374A Expired GB1475538A (en) | 1973-09-19 | 1974-08-27 | Pipeline signalling systems and techniques |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU474592B2 (en) |
| CA (1) | CA980422A (en) |
| FR (1) | FR2244125B1 (en) |
| GB (1) | GB1475538A (en) |
| NL (1) | NL158931B (en) |
-
1973
- 1973-09-19 CA CA181,449A patent/CA980422A/en not_active Expired
-
1974
- 1974-07-10 AU AU71088/74A patent/AU474592B2/en not_active Expired
- 1974-07-29 NL NL7410156A patent/NL158931B/en not_active IP Right Cessation
- 1974-08-27 GB GB3739374A patent/GB1475538A/en not_active Expired
- 1974-09-04 FR FR7430054A patent/FR2244125B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2244125B1 (en) | 1977-11-04 |
| CA980422A (en) | 1975-12-23 |
| FR2244125A1 (en) | 1975-04-11 |
| AU474592B2 (en) | 1976-07-29 |
| AU7108874A (en) | 1976-01-15 |
| NL7410156A (en) | 1975-03-21 |
| NL158931B (en) | 1978-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930827 |