Method of detecting collars using computerized pattern recogniti

Details Method of detecting collars using computerized pattern recogniti Method of detecting collars using computerized pattern recogniti

1986-03-14

1988-04-05

Fleming, Michael R.

Boots, shoes, and leggings

340856, 73155, 73151, G01D 140, G01D 512

Patent

active

047362987

ABSTRACT:
A method of determining the location and dimensions of collars present along a section of casing. An inspection instrument is passed through the casing section generating an electromagnetic wave which permeates the casing. The phase shifted electromagnetic wave is detected by a receiver and a data string comprising the degree of phase shift present at each point along the casing section is created. The data string is processed to identify the location of collars present along the casing section. Upon the identification of a collar, a series of pattern recognition interrogations are used to confirm the collar location and to determine the collar's dimensions.

REFERENCES:
patent: 4342911 (1982-08-01), French
patent: 4568933 (1986-02-01), McCracken
patent: 4662209 (1987-05-01), Brown
Dresser Atlas Casing Evaluation Services-The Magnelog Survey, pp. 4-5 and 61-78, 1985.

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