Inventor
BRADFIELD JAMES E
US7 patents
Patents
7 patentsUS4636727AJan 13, 1987
Method and apparatus for detecting the location of defects in tubular sections moving past a well head
PA INC26 citations91
US4710712ADec 1, 1987
Method and apparatus for measuring defects in ferromagnetic elements
PA INC49 citations89
US4611170ASep 9, 1986
Coil apparatus mounted on an axially split spool for indicating wall thickness variations of a length of ferromagnetic pipe
PA INC28 citations89
US4555665ANov 26, 1985
Magnetic flux method for measuring tubular wall thickness
PA INC33 citations89
US4492115AJan 8, 1985
Method and apparatus for measuring defects in ferromagnetic tubing
PA INC42 citations89
US4792756ADec 20, 1988
Method and apparatus for measuring axially extending defects in ferromagnetic elements
PA INC22 citations81
US4704580ANov 3, 1987
Method and apparatus for measuring the depth of local defects in ferromagnetic elements
PA INC21 citations81