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US 9,206,910 B2Granted
Gate valve having low-friction coating over substrate and method for making same
AssigneeVetco Gray Inc.
InventorsJon Bonner Kahn, Fei Tang
Life of this patent
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AssigneeVetco Gray Inc.
InventorsJon Bonner Kahn, Fei Tang
Estimating the term…
A gate valve has a body, the body having a cavity and a flow passage intersecting the cavity. A seat fabricated from a ceramic and/or hardfacing alloy matrix composite substrate is mounted to the body at the intersection of the flow passage and the cavity. A gate fabricated from a ceramic and/or hardfacing alloy matrix composite substrate is installed at the cavity and has an engaging face that slidingly engages the seat while the gate is being moved between open and closed positions. The engaging faces of the gate and seats are coated with a low-friction material to facilitate sliding. The ceramic and/or hardfacing alloy matrix composite substrate construction of the gate and seats with low friction engaging surfaces enhances the gate valve's bearing stress capacity.
A method manufacturing a gate valve having a body with a chamber and a flow passage having an axis and extending through and intersecting the chamber, the method comprising:
An apparatus for controlling well fluids comprising:
An apparatus for controlling well fluids comprising:
Dependencies are inferred from the claim text.