Electricity: measuring and testing – Magnetic – Plural tests
Patent
1984-04-11
1987-01-13
Karlsen, Ernest F.
Electricity: measuring and testing
Magnetic
Plural tests
324238, G01R 3312, G01N 2782
Patent
active
046367276
ABSTRACT:
A tubing trip tool for use in determining the extent of defects in tubular elements comprising a continuous string used in a subterranean oil or gas well during removal of the string from the well is disclosed. Local defects and axially extending defects, as well as the average wall thickness of the tubular elements, are measured. The position of the defects is determined by measuring the variable velocity of the tubular elements as they are removed from the well and by detecting end couplings having a larger cross-sectional area and the direction in which the end couplings are moving. A string profile of the position of the defects in the continuous string can also be established.
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Bradfield James E.
Kahil John E.
Lam Clive C.
Milewits Marvin
Karlsen Ernest F.
PA Incorporated
Snow Walter E.
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