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US 7,472,927 B2Granted
Tubular member having an anti-galling coating
AssigneesHunting Oilfield Services (UK) Limited, M.P. Eastern Limited
InventorsRichard J. Guise, Michael G. Edwards
Life of this patent
Estimating the term…
Abstract
A tubular member 12 having an internal and/or external metal thread 18, 20 at one end thereof, at least part of the thread 18, 20 being coated with an alloy of copper and tin, said alloy containing 5 wt % to 95 wt % copper. The tubular member 10 can be combined with another tubular member 14, 16 to provide a threaded connection 10 having improved galling resistance.
Claims50
A tubular member having:
- an internal metal thread, an external metal thread, or both at one end thereof,
- at least part of the internal metal thread, external metal thread, or both being coated with an alloy of copper and tin for increasing galling resistance of threaded metal-metal contact points,
- said alloy containing 20 wt % to 80 wt % copper, and
- the remainder of the alloy comprising tin and optionally up to 2 wt % additives or impurities.
1 more element
A threaded connection comprising:
- a first tubular member having an internal metal thread, an external metal thread, or both at one end thereof,
- at least part of the internal metal thread, external metal thread, or both being coated with an alloy of copper and tin for increasing galling resistance of threaded metal-metal contact points,
- said alloy containing 20 wt % to 80 wt % copper, and
- the remainder of the alloy comprising tin and optionally up to 2 wt % additives or impurities;
- and
- a second tubular member, the second tubular member having a threaded end adapted to engage the threaded end of the first tubular member.
3 more elements
A threaded connection comprising:
- a first tubular member having a metal thread at each end thereof,
- at least part of each thread being coated with an alloy of copper and tin for increasing galling resistance of threaded metal-metal contact points,
- said alloy containing 20 wt % to 80 wt % copper, and
- the remainder of the alloy comprising tin and optionally up to 2 wt % additives or impurities;
- a second tubular member, the second tubular member having a threaded end adapted to engage one of the threaded ends of the first tubular member;
- and
- a third tubular member, the third tubular member having a threaded end adapted to engage the other end of the first tubular member.
4 more elements
A method comprising:
- coating an alloy of copper and tin on all or a portion of threaded metal-metal contact points for increasing the galling resistance of the threaded metal-metal contact points of oil and gas tubulars,
- wherein the alloy comprises 20 wt % to 80 wt % copper, and
- the remainder of the alloy comprises tin and optionally up to 2 wt % additives or impurities.
Dependencies are inferred from the claim text.