Drill-Pipe
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Dimensions of Drill Pipe
with Weld-On Tool Joints
Internal Upset
IU
External Upset
EU
Internal-External Upset
IEU
Treatment of Thread Surfaces
The tool joint threads are phosphated and in connection with the thread dope, according to API BUL 7A1, this
provides an excellent surface treatment to avoid galling during make-up and break-out.
As an alternative copper plated threads can be supplied on request.
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