Wedge threads with a solid lubricant coating
AssigneeHydril Company
InventorsDavid Llewellyn Mallis, Andrea L. Reade-Romero
Life of this patent
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Abstract
A tubular connection includes a pin member having external wedge threads configured to engage a box member having corresponding internal wedge threads, and a solid lubricant coating applied on at least one of the internal and external wedge threads wherein the solid lubricant coating comprises a first uniform layer of a dry corrosion inhibiting coating made of an epoxy resin containing particles of zinc and a second uniform layer of a dry lubricant coating covering the first uniform layer.
Claims18
A tubular connection comprising:
- a pin member having external wedge threads configured to engage a box member having corresponding internal wedge threads;
- and
- a solid lubricant coating permanently bonded on at least one of the internal and external wedge threads.
A method of manufacturing a connection having wedge threads, the method comprising:
- machining internal wedge threads on a box member and external wedge threads on a pin member, wherein the internal and external wedge threads are configured to correspond;
- and
- permanently bonding a solid lubricant coating on at least one of the internal and external wedge threads.
Dependencies are inferred from the claim text.