COMPOSITE DIAPHRAGM FOR ROLLER CONE PRESSURE COMPENSATION SYSTEM
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United States of America Patent
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Issued Date -
Mar 17, 2016
app pub date -
Sep 17, 2014
filing date -
Sep 17, 2014
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Abstract
To address issues of durability of pressure compensation systems in roller cone rock bits, a composite diaphragm of a pressure compensation system for a roller cone drill bit includes an inner surface that defines an inner cavity and is formed of a first elastomeric material. The inner cavity is configured to serve as a lubricant reservoir. An external surface is disposed opposite the inner surface and is formed of a second elastomeric material that is different than the first elastomeric material.
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