Lip seal for roller cone drill bit
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United States of America Patent
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May 2, 2006
Grant Date -
Mar 17, 2005
app pub date -
Sep 12, 2003
filing date -
Sep 12, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A radial lip seal for use with roller cone drill bits is at least partially collapsed and held in place when the drill bit is subjected to hydrostatic pressure in the well bore when performing drilling operations. The drill bit and seal cooperate to form at least one void intentionally established between the outer surface of a seal recess in the bit and the outer surface of the lip seal. The drill bit has a spindle and a rolling cutter positioned around the spindle. The seal recess is formed in the rolling cutter and has an outer surface to carry the lip seal.
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