Oil well pipe joint
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United States of America Patent
Stats
-
Dec 23, 1986
Grant Date -
N/A
app pub date -
Mar 27, 1985
filing date -
Mar 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An oil well pipe joint comprising a metal-to-metal sealing portion without thread is disclosed. A metal-plated or resin-coated layer exhibiting improved resistance to galling is provided on the outer peripheral surface of a thread-free lip portion which constitutes part of the metal-to-metal sealing portion on an externally-threaded member. At the metal sealing portion, satisfactory sealing properties are maintained under severe corrosive conditions, enabling the joint to be connected and disconnected over 10 times, and usually over 25 times.
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Cited Art Landscape
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