Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate
2006-06-27
2006-06-27
Tsay, Frank S. (Department: 3672)
Wells
Processes
With indicating, testing, measuring or locating
Reexamination Certificate
active
07066255
ABSTRACT:
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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Lewin Allan
Sugden Daryl R.
Baker & Botts L.L.P.
Nabors Industries, Inc.
Tsay Frank S.
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