Electricity: measuring and testing – Magnetic – Magnetic sensor within material
Patent
1986-02-19
1988-01-05
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic sensor within material
33313, 73151, 324247, E21B 4702, G01C 706, G01B 728
Patent
active
047178752
ABSTRACT:
A change in curvature or displacement of a section of submarine or subterranean fluid transmission pipeline is measured by traversing the pipeline with a pig having an onboard instrument package, including accelerometers and a longitudinal position measuring device comprising a magnetometer for counting the girth welds or other known magnetic anomalies along the section of pipeline to be measured. The accelerometers are mounted at the central longitudinal axis of the pig which is substantially coincident with the central longitudinal axis of the section of pipeline being measured so that the roll attitude of the pig does not influence the signals generated by the accelerometers. This arrangement precludes the requirement of mounting the accelerometers on a gyroscopic stabilized platform since the absolute position of the pig in space is not required, but primarily the change in curvature or displacement of the pipeline from a predetermined course is what is desired to be known. The pig weight is minimized and supporting structure is sufficiently stiff as to provide natural modes of vibration at frequencies higher than the frequencies of signals of interest as the pig traverses the pipe.
REFERENCES:
patent: 2834113 (1958-05-01), En Dean et al.
patent: 2940178 (1960-06-01), Krueger
patent: 3460028 (1969-08-01), Beaver et al.
patent: 3789511 (1974-02-01), Groom et al.
patent: 4163324 (1979-08-01), Russell et al.
patent: 4231252 (1980-11-01), Cherkson
patent: 4265028 (1981-05-01), Van Steenwyk
patent: 4361192 (1982-11-01), Trowsdale
patent: 4399692 (1983-08-01), Hulsing et al.
patent: 4524526 (1985-06-01), Levine
Atlantic Richfield Company
Martin Michael E.
Strecker Gerard R.
LandOfFree
Method and system for determining curvature in fluid transmissio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for determining curvature in fluid transmissio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for determining curvature in fluid transmissio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-10102