Method for detecting wear at connections between pin and box joints
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United States of America Patent
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Jan 4, 2000
Grant Date -
N/A
app pub date -
Sep 24, 1998
filing date -
Sep 24, 1998
priority date (Note) -
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Abstract
A method of detecting thread wear for drill pipe and drill casing that are connectable end-to-end at threaded joint connections includes the providing of a pair of pipe joints to be joined coming each having end portions with threads that engage upon assembly. A projection is place on a first of the pipe joints near the joint end portion, the projection facing a second pipe joint during assembly of the pair of pipe joints. The joints are connected together and observed after assembly to determine weather or not the projection has become mechanically deformed or has scratched the surface of the opposing joint to thereby indicating worn condition of the threads.
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