Patent ID: 6453738
Filing Date: 2002-09-24
Classification: B01D,B03C,E21B

Abstract:
A method of analyzing the condition of well casing by collecting magnetic casing fragments from fluids discharged from a well comprising the steps of:(a) passing the fluids through a magnetic field created by a shrouded magnet to separate the casing fragments and other magnetic materials from the fluids; (b) separating the casing fragments from the other magnetic materials; (c) weighing the casing fragments; (d) calculating the total weight of the casing fragments recovered from the well; (e) calculating the total weight of the casing originally installed in the well; (f) calculating the percent of metal loss from the casing by dividing the total weight of the casing fragments recovered from the well by the total weight of the casing originally installed in the well; and (g) visually examining the casing fragments.