Threaded joint for an oil well pipe
This invention relates to a threaded joint for an oil well type having excellent galling resistance. More particularly, it relates to a threaded joint for an oil well pipe used in the excavation of crude oil and which can undergo repeated tightening and loosening without using a liquid lubricant and...
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| Main Authors | , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
20.01.2004
|
| Online Access | Get full text |
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