Wedge threads with a solid lubricant coating

a technology of solid lubricant coating and wedge thread, which is applied in the direction of hose connection, screw threaded joint, manufacturing tools, etc., can solve the problems of limiting the make-up speed of the connection, damage to the connection, and insufficient make-up
US20110084477A1Inactive Publication Date: 2011-04-14HYDRIL CO
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Patent Information

Authority / Receiving Office
US ¡ United States
Patent Type
Applications(United States)
Current Assignee / Owner
HYDRIL CO
Publication Date
2011-04-14
Estimated Expiration
Not applicable ¡ inactive 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.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority, under 35 U.S.C. §119(e), to U.S. Patent Application No. 61 / 251,124, filed on Oct. 13, 2009, which is assigned to the present assignee and herein incorporated by reference in its entirety.BACKGROUND

[0002] 1. Field of the Disclosure

[0003] Embodiments disclosed herein relate generally to wedge thread connections. More particularly, embodiments disclosed herein relate to wedge threads having a solid lubricant coating permanently bonded thereon and related methods of permanently bonding the solid lubricant coating on the wedge threads.

[0004] 2. Background Art

[0005] One type of threaded connection commonly used in oil country tubular goods is known as a wedge thread. Referring initially to FIGS. 1A and 1B, a prior art tubular connection 100 having a wedge thread is shown. As used herein, “wedge threads” are threads, regardless of a particular thread form, that increase in width (i.e., axial distance between load fl...

Claims

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