A cylindrical metal ring used to guide, and centralize, packers or tools inside casing.
A cylindrical ring, usually vise-shaped, employed to back up (or assist) a sealing member against extrusion under temperature and pressure.
A special type of flanged connection in which a metal ring (resting in a groove in he flange) serves as a pressure seal between the ...
A ring of wedges that supports a string of pipe or a threaded, tapered ring used for the same purpose.
A conducting ring that gives current to or receives current from the brushes in a generator or motor.
A spring-actuated metal band or ring(ferrule) used to expand a liner patch when making casing repairs. See liner patch.
A short, heavy, cylindrical steel section with a rounded bottom and attached to the bottom of the casing string. It contains a check valve and ...
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