WINCH ASSEMBLY
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United States of America Patent
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Issued Date -
Nov 25, 2010
app pub date -
Jul 28, 2008
filing date -
Jul 31, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A winch assembly (30) comprises a winch chamber (32) defined within a housing (31) which includes an orifice to permit fluid communication with a wellbore. A winch drum (34) which supports a spoolable medium (36), such as wireline, is rotatably mounted within the winch chamber (32). A cavity (50) containing a fluid, such as lubrication oil, is defined within the housing (31) and a sealing arrangement is provided between the winch chamber (32) and the cavity (50). The winch assembly (30) also includes a pressure compensator (62) adapted to maintain the cavity (50) at least at the same pressure as the winch chamber (32).
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