Protection against loss of downhole tools

Details Protection against loss of downhole tools Protection against loss of downhole tools

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 47/00 (2012.01)

Patent

CA 2411775

A method of protecting against loss of downhole tools in wells, the method comprising the steps of making repeated use of a wire rope to suspend downhole tools in wells, the downhole tools being suspended from a downhole end of the wire rope, testing the integrity of the wire rope from time to time according to a maintenance schedule, and shortening the wire rope when the wire rope fails integrity testing. Tests that may be performed are a test of the longitudinal strength of at least one wire from the downhole end of the wire rope, a test of the stretch of the wire rope, a test of the diameter of a wire from the downhole end of the wire rope, a test of the diameter of the downhole end of the wire rope, a test of the flex strength of a wire from the wire rope, a test of the twist strength of a wire from the wire rope; and a test of the weight of a segment of the wire rope.

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