Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2011-01-25
2011-01-25
Nguyen, Hoai-An D (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S071200, C324S527000
Reexamination Certificate
active
07876110
ABSTRACT:
Method and apparatus for simulating electrical pipe-to-soil impedance of a coated segment of a pipeline includes simulating a current injection point to a buried pipe section, simulating a first output signal from a magnetometer positioned at a first location over the buried pipe section, simulating a second output signal from a magnetometer positioned at a second location over the buried pipe section, simulating bonding of pipe coating of the pipe section, and simulating soil resistance of a soil environment surrounding the buried pipe section. The invention includes both field-test simulation with calibration pipe samples, and bench-test simulation using electronic simulation of the pipe coating. The simulations may be used for test and general calibration of MEIS pipeline coating inspection systems.
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Davis Thomas James
Miller Scott Downing
Perez Jaime Paunlagui
Abelman ,Frayne & Schwab
Nguyen Hoai-An D
Saudi Arabian Oil Company
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